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perl/doio.c

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/* doio.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* Far below them they saw the white waters pour into a foaming bowl, and
* then swirl darkly about a deep oval basin in the rocks, until they found
* their way out again through a narrow gate, and flowed away, fuming and
* chattering, into calmer and more level reaches.
*
* [p.684 of _The Lord of the Rings_, IV/vi: "The Forbidden Pool"]
*/
/* This file contains functions that do the actual I/O on behalf of ops.
* For example, pp_print() calls the do_print() function in this file for
* each argument needing printing.
*/
#include "EXTERN.h"
#define PERL_IN_DOIO_C
#include "perl.h"
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
#ifndef HAS_SEM
#include <sys/ipc.h>
#endif
#ifdef HAS_MSG
#include <sys/msg.h>
#endif
#ifdef HAS_SHM
#include <sys/shm.h>
# ifndef HAS_SHMAT_PROTOTYPE
extern Shmat_t shmat (int, char *, int);
# endif
#endif
#endif
#ifdef I_UTIME
# if defined(_MSC_VER) || defined(__MINGW32__)
# include <sys/utime.h>
# else
# include <utime.h>
# endif
#endif
#ifdef O_EXCL
# define OPEN_EXCL O_EXCL
#else
# define OPEN_EXCL 0
#endif
#define PERL_MODE_MAX 8
#define PERL_FLAGS_MAX 10
#include <signal.h>
void
Perl_setfd_cloexec(int fd)
{
assert(fd >= 0);
#if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
}
void
Perl_setfd_inhexec(int fd)
{
assert(fd >= 0);
#if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
(void) fcntl(fd, F_SETFD, 0);
#endif
}
void
Perl_setfd_cloexec_for_nonsysfd(pTHX_ int fd)
{
assert(fd >= 0);
if(fd > PL_maxsysfd)
setfd_cloexec(fd);
}
void
Perl_setfd_inhexec_for_sysfd(pTHX_ int fd)
{
assert(fd >= 0);
if(fd <= PL_maxsysfd)
setfd_inhexec(fd);
}
void
Perl_setfd_cloexec_or_inhexec_by_sysfdness(pTHX_ int fd)
{
assert(fd >= 0);
if(fd <= PL_maxsysfd)
setfd_inhexec(fd);
else
setfd_cloexec(fd);
}
#define DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC) \
do { \
int res = (GENOPEN_NORMAL); \
if(LIKELY(res != -1)) GENSETFD_CLOEXEC; \
return res; \
} while(0)
#if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC) && \
defined(F_GETFD)
enum { CLOEXEC_EXPERIMENT = 0, CLOEXEC_AT_OPEN, CLOEXEC_AFTER_OPEN };
# define DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, TESTFD, GENOPEN_CLOEXEC, \
GENOPEN_NORMAL, GENSETFD_CLOEXEC) \
do { \
switch (strategy) { \
case CLOEXEC_EXPERIMENT: default: { \
int res = (GENOPEN_CLOEXEC), eno; \
if (LIKELY(res != -1)) { \
int fdflags = fcntl((TESTFD), F_GETFD); \
if (LIKELY(fdflags != -1) && \
LIKELY(fdflags & FD_CLOEXEC)) { \
strategy = CLOEXEC_AT_OPEN; \
} else { \
strategy = CLOEXEC_AFTER_OPEN; \
GENSETFD_CLOEXEC; \
} \
} else if (UNLIKELY((eno = errno) == EINVAL || \
eno == ENOSYS)) { \
res = (GENOPEN_NORMAL); \
if (LIKELY(res != -1)) { \
strategy = CLOEXEC_AFTER_OPEN; \
GENSETFD_CLOEXEC; \
} else if (!LIKELY((eno = errno) == EINVAL || \
eno == ENOSYS)) { \
strategy = CLOEXEC_AFTER_OPEN; \
} \
} \
return res; \
} \
case CLOEXEC_AT_OPEN: \
return (GENOPEN_CLOEXEC); \
case CLOEXEC_AFTER_OPEN: \
DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC); \
} \
} while(0)
#else
# define DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, TESTFD, GENOPEN_CLOEXEC, \
GENOPEN_NORMAL, GENSETFD_CLOEXEC) \
DO_GENOPEN_THEN_CLOEXEC(GENOPEN_NORMAL, GENSETFD_CLOEXEC)
#endif
#define DO_ONEOPEN_THEN_CLOEXEC(ONEOPEN_NORMAL) \
do { \
int fd; \
DO_GENOPEN_THEN_CLOEXEC(fd = (ONEOPEN_NORMAL), \
setfd_cloexec(fd)); \
} while(0)
#define DO_ONEOPEN_EXPERIMENTING_CLOEXEC(strategy, \
ONEOPEN_CLOEXEC, ONEOPEN_NORMAL) \
do { \
int fd; \
DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, \
fd, \
fd = (ONEOPEN_CLOEXEC), \
fd = (ONEOPEN_NORMAL), setfd_cloexec(fd)); \
} while(0)
#define DO_PIPESETFD_CLOEXEC(PIPEFD) \
do { \
setfd_cloexec((PIPEFD)[0]); \
setfd_cloexec((PIPEFD)[1]); \
} while(0)
#define DO_PIPEOPEN_THEN_CLOEXEC(PIPEFD, PIPEOPEN_NORMAL) \
DO_GENOPEN_THEN_CLOEXEC(PIPEOPEN_NORMAL, DO_PIPESETFD_CLOEXEC(PIPEFD))
#define DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(strategy, PIPEFD, PIPEOPEN_CLOEXEC, \
PIPEOPEN_NORMAL) \
DO_GENOPEN_EXPERIMENTING_CLOEXEC(strategy, \
(PIPEFD)[0], PIPEOPEN_CLOEXEC, \
PIPEOPEN_NORMAL, DO_PIPESETFD_CLOEXEC(PIPEFD))
int
Perl_PerlLIO_dup_cloexec(pTHX_ int oldfd)
{
#if !defined(PERL_IMPLICIT_SYS) && defined(F_DUPFD_CLOEXEC)
/*
* struct IPerlLIO doesn't cover fcntl(), and there's no clear way
* to extend it, so for the time being this just isn't available on
* PERL_IMPLICIT_SYS builds.
*/
dVAR;
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_dup,
fcntl(oldfd, F_DUPFD_CLOEXEC, 0),
PerlLIO_dup(oldfd));
#else
DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_dup(oldfd));
#endif
}
int
Perl_PerlLIO_dup2_cloexec(pTHX_ int oldfd, int newfd)
{
#if !defined(PERL_IMPLICIT_SYS) && defined(HAS_DUP3) && defined(O_CLOEXEC)
/*
* struct IPerlLIO doesn't cover dup3(), and there's no clear way
* to extend it, so for the time being this just isn't available on
* PERL_IMPLICIT_SYS builds.
*/
dVAR;
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_dup2,
dup3(oldfd, newfd, O_CLOEXEC),
PerlLIO_dup2(oldfd, newfd));
#else
DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_dup2(oldfd, newfd));
#endif
}
int
Perl_PerlLIO_open_cloexec(pTHX_ const char *file, int flag)
{
dVAR;
PERL_ARGS_ASSERT_PERLLIO_OPEN_CLOEXEC;
#if defined(O_CLOEXEC)
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_open,
PerlLIO_open(file, flag | O_CLOEXEC),
PerlLIO_open(file, flag));
#else
DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_open(file, flag));
#endif
}
int
Perl_PerlLIO_open3_cloexec(pTHX_ const char *file, int flag, int perm)
{
dVAR;
PERL_ARGS_ASSERT_PERLLIO_OPEN3_CLOEXEC;
#if defined(O_CLOEXEC)
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_open3,
PerlLIO_open3(file, flag | O_CLOEXEC, perm),
PerlLIO_open3(file, flag, perm));
#else
DO_ONEOPEN_THEN_CLOEXEC(PerlLIO_open3(file, flag, perm));
#endif
}
int
Perl_my_mkstemp_cloexec(char *templte)
{
dVAR;
PERL_ARGS_ASSERT_MY_MKSTEMP_CLOEXEC;
#if defined(O_CLOEXEC)
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_mkstemp,
Perl_my_mkostemp(templte, O_CLOEXEC),
Perl_my_mkstemp(templte));
#else
DO_ONEOPEN_THEN_CLOEXEC(Perl_my_mkstemp(templte));
#endif
}
#ifdef HAS_PIPE
int
Perl_PerlProc_pipe_cloexec(pTHX_ int *pipefd)
{
dVAR;
PERL_ARGS_ASSERT_PERLPROC_PIPE_CLOEXEC;
/*
* struct IPerlProc doesn't cover pipe2(), and there's no clear way
* to extend it, so for the time being this just isn't available on
* PERL_IMPLICIT_SYS builds.
*/
# if !defined(PERL_IMPLICIT_SYS) && defined(HAS_PIPE2) && defined(O_CLOEXEC)
DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(PL_strategy_pipe, pipefd,
pipe2(pipefd, O_CLOEXEC),
PerlProc_pipe(pipefd));
# else
DO_PIPEOPEN_THEN_CLOEXEC(pipefd, PerlProc_pipe(pipefd));
# endif
}
#endif
#ifdef HAS_SOCKET
int
Perl_PerlSock_socket_cloexec(pTHX_ int domain, int type, int protocol)
{
# if defined(SOCK_CLOEXEC)
dVAR;
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_socket,
PerlSock_socket(domain, type | SOCK_CLOEXEC, protocol),
PerlSock_socket(domain, type, protocol));
# else
DO_ONEOPEN_THEN_CLOEXEC(PerlSock_socket(domain, type, protocol));
# endif
}
int
Perl_PerlSock_accept_cloexec(pTHX_ int listenfd, struct sockaddr *addr,
Sock_size_t *addrlen)
{
# if !defined(PERL_IMPLICIT_SYS) && \
defined(HAS_ACCEPT4) && defined(SOCK_CLOEXEC)
/*
* struct IPerlSock doesn't cover accept4(), and there's no clear
* way to extend it, so for the time being this just isn't available
* on PERL_IMPLICIT_SYS builds.
*/
dVAR;
DO_ONEOPEN_EXPERIMENTING_CLOEXEC(
PL_strategy_accept,
accept4(listenfd, addr, addrlen, SOCK_CLOEXEC),
PerlSock_accept(listenfd, addr, addrlen));
# else
DO_ONEOPEN_THEN_CLOEXEC(PerlSock_accept(listenfd, addr, addrlen));
# endif
}
#endif
#if defined (HAS_SOCKETPAIR) || \
(defined (HAS_SOCKET) && defined(SOCK_DGRAM) && \
defined(AF_INET) && defined(PF_INET))
int
Perl_PerlSock_socketpair_cloexec(pTHX_ int domain, int type, int protocol,
int *pairfd)
{
dVAR;
PERL_ARGS_ASSERT_PERLSOCK_SOCKETPAIR_CLOEXEC;
# ifdef SOCK_CLOEXEC
DO_PIPEOPEN_EXPERIMENTING_CLOEXEC(PL_strategy_socketpair, pairfd,
PerlSock_socketpair(domain, type | SOCK_CLOEXEC, protocol, pairfd),
PerlSock_socketpair(domain, type, protocol, pairfd));
# else
DO_PIPEOPEN_THEN_CLOEXEC(pairfd,
PerlSock_socketpair(domain, type, protocol, pairfd));
# endif
}
#endif
static IO *
S_openn_setup(pTHX_ GV *gv, char *mode, PerlIO **saveifp, PerlIO **saveofp,
int *savefd, char *savetype)
{
IO * const io = GvIOn(gv);
PERL_ARGS_ASSERT_OPENN_SETUP;
*saveifp = NULL;
*saveofp = NULL;
*savefd = -1;
*savetype = IoTYPE_CLOSED;
Zero(mode,sizeof(mode),char);
PL_forkprocess = 1; /* assume true if no fork */
/* If currently open - close before we re-open */
if (IoIFP(io)) {
if (IoTYPE(io) == IoTYPE_STD) {
/* This is a clone of one of STD* handles */
}
else {
const int old_fd = PerlIO_fileno(IoIFP(io));
if (old_fd >= 0 && old_fd <= PL_maxsysfd) {
/* This is one of the original STD* handles */
*saveifp = IoIFP(io);
*saveofp = IoOFP(io);
*savetype = IoTYPE(io);
*savefd = old_fd;
}
else {
int result;
if (IoTYPE(io) == IoTYPE_PIPE)
result = PerlProc_pclose(IoIFP(io));
else if (IoIFP(io) != IoOFP(io)) {
if (IoOFP(io)) {
result = PerlIO_close(IoOFP(io));
PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
}
else
result = PerlIO_close(IoIFP(io));
}
else
result = PerlIO_close(IoIFP(io));
if (result == EOF && old_fd > PL_maxsysfd) {
/* Why is this not Perl_warn*() call ? */
PerlIO_printf(Perl_error_log,
"Warning: unable to close filehandle %" HEKf
" properly.\n",
HEKfARG(GvENAME_HEK(gv))
);
}
}
}
IoOFP(io) = IoIFP(io) = NULL;
}
return io;
}
bool
Perl_do_openn(pTHX_ GV *gv, const char *oname, I32 len, int as_raw,
int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp,
I32 num_svs)
{
PERL_ARGS_ASSERT_DO_OPENN;
if (as_raw) {
/* sysopen style args, i.e. integer mode and permissions */
if (num_svs != 0) {
Perl_croak(aTHX_ "panic: sysopen with multiple args, num_svs=%ld",
(long) num_svs);
}
return do_open_raw(gv, oname, len, rawmode, rawperm, NULL);
}
return do_open6(gv, oname, len, supplied_fp, svp, num_svs);
}
bool
Perl_do_open_raw(pTHX_ GV *gv, const char *oname, STRLEN len,
int rawmode, int rawperm, Stat_t *statbufp)
{
PerlIO *saveifp;
PerlIO *saveofp;
int savefd;
char savetype;
char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
int writing = 0;
PerlIO *fp;
PERL_ARGS_ASSERT_DO_OPEN_RAW;
/* For ease of blame back to 5.000, keep the existing indenting. */
{
/* sysopen style args, i.e. integer mode and permissions */
STRLEN ix = 0;
const int appendtrunc =
0
#ifdef O_APPEND /* Not fully portable. */
|O_APPEND
#endif
#ifdef O_TRUNC /* Not fully portable. */
|O_TRUNC
#endif
;
const int modifyingmode = O_WRONLY|O_RDWR|O_CREAT|appendtrunc;
int ismodifying;
SV *namesv;
/* It's not always
O_RDONLY 0
O_WRONLY 1
O_RDWR 2
It might be (in OS/390 and Mac OS Classic it is)
O_WRONLY 1
O_RDONLY 2
O_RDWR 3
This means that simple & with O_RDWR would look
like O_RDONLY is present. Therefore we have to
be more careful.
*/
if ((ismodifying = (rawmode & modifyingmode))) {
if ((ismodifying & O_WRONLY) == O_WRONLY ||
(ismodifying & O_RDWR) == O_RDWR ||
(ismodifying & (O_CREAT|appendtrunc)))
TAINT_PROPER("sysopen");
}
mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */
#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
rawmode |= O_LARGEFILE; /* Transparently largefiley. */
#endif
IoTYPE(io) = PerlIO_intmode2str(rawmode, &mode[ix], &writing);
namesv = newSVpvn_flags(oname, len, SVs_TEMP);
fp = PerlIO_openn(aTHX_ NULL, mode, -1, rawmode, rawperm, NULL, 1, &namesv);
}
return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
savetype, writing, 0, NULL, statbufp);
}
bool
Perl_do_open6(pTHX_ GV *gv, const char *oname, STRLEN len,
PerlIO *supplied_fp, SV **svp, U32 num_svs)
{
PerlIO *saveifp;
PerlIO *saveofp;
int savefd;
char savetype;
char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */
IO * const io = openn_setup(gv, mode, &saveifp, &saveofp, &savefd, &savetype);
int writing = 0;
PerlIO *fp;
bool was_fdopen = FALSE;
char *type = NULL;
PERL_ARGS_ASSERT_DO_OPEN6;
/* For ease of blame back to 5.000, keep the existing indenting. */
{
/* Regular (non-sys) open */
char *name;
STRLEN olen = len;
char *tend;
int dodup = 0;
bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0;
/* Collect default raw/crlf info from the op */
if (PL_op && PL_op->op_type == OP_OPEN) {
/* set up IO layers */
const U8 flags = PL_op->op_private;
in_raw = (flags & OPpOPEN_IN_RAW);
in_crlf = (flags & OPpOPEN_IN_CRLF);
out_raw = (flags & OPpOPEN_OUT_RAW);
out_crlf = (flags & OPpOPEN_OUT_CRLF);
}
type = savepvn(oname, len);
tend = type+len;
SAVEFREEPV(type);
/* Lose leading and trailing white space */
while (isSPACE(*type))
type++;
while (tend > type && isSPACE(tend[-1]))
*--tend = '\0';
if (num_svs) {
const char *p;
STRLEN nlen = 0;
/* New style explicit name, type is just mode and layer info */
#ifdef USE_STDIO
if (SvROK(*svp) && !memchr(oname, '&', len)) {
if (ckWARN(WARN_IO))
Perl_warner(aTHX_ packWARN(WARN_IO),
"Can't open a reference");
SETERRNO(EINVAL, LIB_INVARG);
fp = NULL;
goto say_false;
}
#endif /* USE_STDIO */
p = (SvOK(*svp) || SvGMAGICAL(*svp)) ? SvPV(*svp, nlen) : NULL;
if (p && !IS_SAFE_PATHNAME(p, nlen, "open")) {
fp = NULL;
goto say_false;
}
name = p ? savepvn(p, nlen) : savepvs("");
SAVEFREEPV(name);
}
else {
name = type;
len = tend-type;
}
IoTYPE(io) = *type;
if ((*type == IoTYPE_RDWR) && /* scary */
(*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) &&
((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) {
TAINT_PROPER("open");
mode[1] = *type++;
writing = 1;
}
if (*type == IoTYPE_PIPE) {
if (num_svs) {
if (type[1] != IoTYPE_STD) {
unknown_open_mode:
Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname);
}
type++;
}
do {
type++;
} while (isSPACE(*type));
if (!num_svs) {
name = type;
len = tend-type;
}
if (*name == '\0') {
/* command is missing 19990114 */
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
errno = EPIPE;
fp = NULL;
goto say_false;
}
if (!(*name == '-' && name[1] == '\0') || num_svs)
TAINT_ENV();
TAINT_PROPER("piped open");
if (!num_svs && name[len-1] == '|') {
name[--len] = '\0' ;
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ packWARN(WARN_PIPE), "Can't open bidirectional pipe");
}
mode[0] = 'w';
writing = 1;
if (out_raw)
mode[1] = 'b';
else if (out_crlf)
mode[1] = 't';
if (num_svs > 1) {
fp = PerlProc_popen_list(mode, num_svs, svp);
}
else {
fp = PerlProc_popen(name,mode);
}
if (num_svs) {
if (*type) {
if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
fp = NULL;
goto say_false;
}
}
}
} /* IoTYPE_PIPE */
else if (*type == IoTYPE_WRONLY) {
TAINT_PROPER("open");
type++;
if (*type == IoTYPE_WRONLY) {
/* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */
mode[0] = IoTYPE(io) = IoTYPE_APPEND;
type++;
}
else {
mode[0] = 'w';
}
writing = 1;
if (out_raw)
mode[1] = 'b';
else if (out_crlf)
mode[1] = 't';
if (*type == '&') {
duplicity:
dodup = PERLIO_DUP_FD;
type++;
if (*type == '=') {
dodup = 0;
type++;
}
if (!num_svs && !*type && supplied_fp) {
/* "<+&" etc. is used by typemaps */
fp = supplied_fp;
}
else {
PerlIO *that_fp = NULL;
int wanted_fd;
UV uv;
if (num_svs > 1) {
/* diag_listed_as: More than one argument to '%s' open */
Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io));
}
while (isSPACE(*type))
type++;
if (num_svs && (
SvIOK(*svp)
|| (SvPOKp(*svp) && looks_like_number(*svp))
)) {
wanted_fd = SvUV(*svp);
num_svs = 0;
}
else if (isDIGIT(*type)
&& grok_atoUV(type, &uv, NULL)
&& uv <= INT_MAX
) {
wanted_fd = (int)uv;
}
else {
const IO* thatio;
if (num_svs) {
thatio = sv_2io(*svp);
}
else {
GV * const thatgv = gv_fetchpvn_flags(type, tend - type,
0, SVt_PVIO);
thatio = GvIO(thatgv);
}
if (!thatio) {
#ifdef EINVAL
SETERRNO(EINVAL,SS_IVCHAN);
#endif
fp = NULL;
goto say_false;
}
if ((that_fp = IoIFP(thatio))) {
/* Flush stdio buffer before dup. --mjd
* Unfortunately SEEK_CURing 0 seems to
* be optimized away on most platforms;
* only Solaris and Linux seem to flush
* on that. --jhi */
/* On the other hand, do all platforms
* take gracefully to flushing a read-only
* filehandle? Perhaps we should do
* fsetpos(src)+fgetpos(dst)? --nik */
PerlIO_flush(that_fp);
wanted_fd = PerlIO_fileno(that_fp);
/* When dup()ing STDIN, STDOUT or STDERR
* explicitly set appropriate access mode */
if (that_fp == PerlIO_stdout()
|| that_fp == PerlIO_stderr())
IoTYPE(io) = IoTYPE_WRONLY;
else if (that_fp == PerlIO_stdin())
IoTYPE(io) = IoTYPE_RDONLY;
/* When dup()ing a socket, say result is
* one as well */
else if (IoTYPE(thatio) == IoTYPE_SOCKET)
IoTYPE(io) = IoTYPE_SOCKET;
}
else {
SETERRNO(EBADF, RMS_IFI);
fp = NULL;
goto say_false;
}
}
if (!num_svs)
type = NULL;
if (that_fp) {
fp = PerlIO_fdupopen(aTHX_ that_fp, NULL, dodup);
}
else {
if (dodup)
wanted_fd = PerlLIO_dup_cloexec(wanted_fd);
else
was_fdopen = TRUE;
if (!(fp = PerlIO_openn(aTHX_ type,mode,wanted_fd,0,0,NULL,num_svs,svp))) {
if (dodup && wanted_fd >= 0)
PerlLIO_close(wanted_fd);
}
}
}
} /* & */
else {
while (isSPACE(*type))
type++;
if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
type++;
fp = PerlIO_stdout();
IoTYPE(io) = IoTYPE_STD;
if (num_svs > 1) {
/* diag_listed_as: More than one argument to '%s' open */
Perl_croak(aTHX_ "More than one argument to '>%c' open",IoTYPE_STD);
}
}
else {
if (num_svs) {
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
}
else {
SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
type = NULL;
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
}
}
} /* !& */
if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
goto unknown_open_mode;
} /* IoTYPE_WRONLY */
else if (*type == IoTYPE_RDONLY) {
do {
type++;
} while (isSPACE(*type));
mode[0] = 'r';
if (in_raw)
mode[1] = 'b';
else if (in_crlf)
mode[1] = 't';
if (*type == '&') {
goto duplicity;
}
if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) {
type++;
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
if (num_svs > 1) {
/* diag_listed_as: More than one argument to '%s' open */
Perl_croak(aTHX_ "More than one argument to '<%c' open",IoTYPE_STD);
}
}
else {
if (num_svs) {
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
}
else {
SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
type = NULL;
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
}
}
if (!fp && type && *type && *type != ':' && !isIDFIRST(*type))
goto unknown_open_mode;
} /* IoTYPE_RDONLY */
else if ((num_svs && /* '-|...' or '...|' */
type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) ||
(!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) {
if (num_svs) {
type += 2; /* skip over '-|' */
}
else {
*--tend = '\0';
while (tend > type && isSPACE(tend[-1]))
*--tend = '\0';
for (; isSPACE(*type); type++)
;
name = type;
len = tend-type;
}
if (*name == '\0') {
/* command is missing 19990114 */
if (ckWARN(WARN_PIPE))
Perl_warner(aTHX_ packWARN(WARN_PIPE), "Missing command in piped open");
errno = EPIPE;
fp = NULL;
goto say_false;
}
if (!(*name == '-' && name[1] == '\0') || num_svs)
TAINT_ENV();
TAINT_PROPER("piped open");
mode[0] = 'r';
if (in_raw)
mode[1] = 'b';
else if (in_crlf)
mode[1] = 't';
if (num_svs > 1) {
fp = PerlProc_popen_list(mode,num_svs,svp);
}
else {
fp = PerlProc_popen(name,mode);
}
IoTYPE(io) = IoTYPE_PIPE;
if (num_svs) {
while (isSPACE(*type))
type++;
if (*type) {
if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) {
fp = NULL;
goto say_false;
}
}
}
}
else { /* layer(Args) */
if (num_svs)
goto unknown_open_mode;
name = type;
IoTYPE(io) = IoTYPE_RDONLY;
for (; isSPACE(*name); name++)
;
mode[0] = 'r';
if (in_raw)
mode[1] = 'b';
else if (in_crlf)
mode[1] = 't';
if (*name == '-' && name[1] == '\0') {
fp = PerlIO_stdin();
IoTYPE(io) = IoTYPE_STD;
}
else {
if (num_svs) {
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp);
}
else {
SV *namesv = newSVpvn_flags(type, tend - type, SVs_TEMP);
type = NULL;
fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,1,&namesv);
}
}
}
}
say_false:
return openn_cleanup(gv, io, fp, mode, oname, saveifp, saveofp, savefd,
savetype, writing, was_fdopen, type, NULL);
}
/* Yes, this is ugly, but it's private, and I don't see a cleaner way to
simplify the two-headed public interface of do_openn. */
static bool
S_openn_cleanup(pTHX_ GV *gv, IO *io, PerlIO *fp, char *mode, const char *oname,
PerlIO *saveifp, PerlIO *saveofp, int savefd, char savetype,
int writing, bool was_fdopen, const char *type, Stat_t *statbufp)
{
int fd;
Stat_t statbuf;
PERL_ARGS_ASSERT_OPENN_CLEANUP;
Zero(&statbuf, 1, Stat_t);
if (!fp) {
if (IoTYPE(io) == IoTYPE_RDONLY && ckWARN(WARN_NEWLINE)
&& should_warn_nl(oname)
)
{
GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "open");
GCC_DIAG_RESTORE_STMT;
}
goto say_false;
}
if (ckWARN(WARN_IO)) {
if ((IoTYPE(io) == IoTYPE_RDONLY) &&
(fp == PerlIO_stdout() || fp == PerlIO_stderr())) {
Perl_warner(aTHX_ packWARN(WARN_IO),
"Filehandle STD%s reopened as %" HEKf
" only for input",
((fp == PerlIO_stdout()) ? "OUT" : "ERR"),
HEKfARG(GvENAME_HEK(gv)));
}
else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) {
Perl_warner(aTHX_ packWARN(WARN_IO),
"Filehandle STDIN reopened as %" HEKf " only for output",
HEKfARG(GvENAME_HEK(gv))
);
}
}
fd = PerlIO_fileno(fp);
/* Do NOT do: "if (fd < 0) goto say_false;" here. If there is no
* fd assume it isn't a socket - this covers PerlIO::scalar -
* otherwise unless we "know" the type probe for socket-ness.
*/
if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && fd >= 0) {
if (PerlLIO_fstat(fd,&statbuf) < 0) {
/* If PerlIO claims to have fd we had better be able to fstat() it. */
(void) PerlIO_close(fp);
goto say_false;
}
#ifndef PERL_MICRO
if (S_ISSOCK(statbuf.st_mode))
IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */
#ifdef HAS_SOCKET
else if (
!(statbuf.st_mode & S_IFMT)
&& IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */
&& IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */
) { /* on OS's that return 0 on fstat()ed pipe */
char tmpbuf[256];
Sock_size_t buflen = sizeof tmpbuf;
if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
|| errno != ENOTSOCK)
IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */
/* but some return 0 for streams too, sigh */
}
#endif /* HAS_SOCKET */
#endif /* !PERL_MICRO */
}
/* Eeek - FIXME !!!
* If this is a standard handle we discard all the layer stuff
* and just dup the fd into whatever was on the handle before !
*/
if (saveifp) { /* must use old fp? */
/* If fd is less that PL_maxsysfd i.e. STDIN..STDERR
then dup the new fileno down
*/
if (saveofp) {
PerlIO_flush(saveofp); /* emulate PerlIO_close() */
if (saveofp != saveifp) { /* was a socket? */
PerlIO_close(saveofp);
}
}
if (savefd != fd) {
/* Still a small can-of-worms here if (say) PerlIO::scalar
is assigned to (say) STDOUT - for now let dup2() fail
and provide the error
*/
if (fd < 0) {
SETERRNO(EBADF,RMS_IFI);
goto say_false;
} else if (PerlLIO_dup2(fd, savefd) < 0) {
(void)PerlIO_close(fp);
goto say_false;
}
#ifdef VMS
if (savefd != PerlIO_fileno(PerlIO_stdin())) {
char newname[FILENAME_MAX+1];
if (PerlIO_getname(fp, newname)) {
if (fd == PerlIO_fileno(PerlIO_stdout()))
vmssetuserlnm("SYS$OUTPUT", newname);
if (fd == PerlIO_fileno(PerlIO_stderr()))
vmssetuserlnm("SYS$ERROR", newname);
}
}
#endif
#if !defined(WIN32)
/* PL_fdpid isn't used on Windows, so avoid this useless work.
* XXX Probably the same for a lot of other places. */
{
Pid_t pid;
SV *sv;
sv = *av_fetch(PL_fdpid,fd,TRUE);
SvUPGRADE(sv, SVt_IV);
pid = SvIVX(sv);
SvIV_set(sv, 0);
sv = *av_fetch(PL_fdpid,savefd,TRUE);
SvUPGRADE(sv, SVt_IV);
SvIV_set(sv, pid);
}
#endif
if (was_fdopen) {
/* need to close fp without closing underlying fd */
int ofd = PerlIO_fileno(fp);
int dupfd = ofd >= 0 ? PerlLIO_dup_cloexec(ofd) : -1;
if (ofd < 0 || dupfd < 0) {
if (dupfd >= 0)
PerlLIO_close(dupfd);
goto say_false;
}
PerlIO_close(fp);
PerlLIO_dup2_cloexec(dupfd, ofd);
setfd_inhexec_for_sysfd(ofd);
PerlLIO_close(dupfd);
}
else
PerlIO_close(fp);
}
fp = saveifp;
PerlIO_clearerr(fp);
fd = PerlIO_fileno(fp);
}
IoIFP(io) = fp;
IoFLAGS(io) &= ~IOf_NOLINE;
if (writing) {
if (IoTYPE(io) == IoTYPE_SOCKET
|| (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(statbuf.st_mode)) ) {
char *s = mode;
if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC)
s++;
*s = 'w';
if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,NULL))) {
PerlIO_close(fp);
goto say_false;
}
}
else
IoOFP(io) = fp;
}
if (statbufp)
*statbufp = statbuf;
return TRUE;
say_false:
IoIFP(io) = saveifp;
IoOFP(io) = saveofp;
IoTYPE(io) = savetype;
return FALSE;
}
/* Open a temp file in the same directory as an original name.
*/
static bool
S_openindirtemp(pTHX_ GV *gv, SV *orig_name, SV *temp_out_name) {
int fd;
PerlIO *fp;
const char *p = SvPV_nolen(orig_name);
const char *sep;
/* look for the last directory separator */
sep = strrchr(p, '/');
#ifdef DOSISH
{
const char *sep2;
if ((sep2 = strrchr(sep ? sep : p, '\\')))
sep = sep2;
}
#endif
#ifdef VMS
if (!sep) {
const char *openp = strchr(p, '[');
if (openp)
sep = strchr(openp, ']');
else {
sep = strchr(p, ':');
}
}
#endif
if (sep) {
sv_setpvn(temp_out_name, p, sep - p + 1);
sv_catpvs(temp_out_name, "XXXXXXXX");
}
else
sv_setpvs(temp_out_name, "XXXXXXXX");
{
int old_umask = umask(0177);
fd = Perl_my_mkstemp_cloexec(SvPVX(temp_out_name));
umask(old_umask);
}
if (fd < 0)
return FALSE;
fp = PerlIO_fdopen(fd, "w+");
if (!fp)
return FALSE;
return do_openn(gv, "+>&", 3, 0, 0, 0, fp, NULL, 0);
}
#if defined(HAS_UNLINKAT) && defined(HAS_RENAMEAT) && defined(HAS_FCHMODAT) && \
(defined(HAS_DIRFD) || defined(HAS_DIR_DD_FD)) && !defined(NO_USE_ATFUNCTIONS) && \
defined(HAS_LINKAT)
# define ARGV_USE_ATFUNCTIONS
#endif
/* Win32 doesn't necessarily return useful information
* in st_dev, st_ino.
*/
#ifndef DOSISH
# define ARGV_USE_STAT_INO
#endif
#define ARGVMG_BACKUP_NAME 0
#define ARGVMG_TEMP_NAME 1
#define ARGVMG_ORIG_NAME 2
#define ARGVMG_ORIG_MODE 3
#define ARGVMG_ORIG_PID 4
/* we store the entire stat_t since the ino_t and dev_t values might
not fit in an IV. I could have created a new structure and
transferred them across, but this seemed too much effort for very
little win.
We store it even when the *at() functions are available, since
while the C runtime might have definitions for these functions, the
operating system or a specific filesystem might not implement them.
eg. NetBSD 6 implements linkat() but only where the fds are AT_FDCWD.
*/
#ifdef ARGV_USE_STAT_INO
# define ARGVMG_ORIG_CWD_STAT 5
#endif
#ifdef ARGV_USE_ATFUNCTIONS
# define ARGVMG_ORIG_DIRP 6
#endif
#ifdef ENOTSUP
#define NotSupported(e) ((e) == ENOSYS || (e) == ENOTSUP)
#else
#define NotSupported(e) ((e) == ENOSYS)
#endif
static int
S_argvout_free(pTHX_ SV *io, MAGIC *mg) {
PERL_UNUSED_ARG(io);
/* note this can be entered once the file has been
successfully deleted too */
assert(IoTYPE(io) != IoTYPE_PIPE);
/* mg_obj can be NULL if a thread is created with the handle open, in which
case we leave any clean up to the parent thread */
if (mg->mg_obj) {
#ifdef ARGV_USE_ATFUNCTIONS
SV **dir_psv;
DIR *dir;
dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE);
assert(dir_psv && *dir_psv && SvIOK(*dir_psv));
dir = INT2PTR(DIR *, SvIV(*dir_psv));
#endif
if (IoIFP(io)) {
if (PL_phase == PERL_PHASE_DESTRUCT && PL_statusvalue == 0) {
(void)argvout_final(mg, (IO*)io, FALSE);
}
else {
SV **pid_psv;
PerlIO *iop = IoIFP(io);
assert(SvTYPE(mg->mg_obj) == SVt_PVAV);
pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE);
assert(pid_psv && *pid_psv);
if (SvIV(*pid_psv) == (IV)PerlProc_getpid()) {
/* if we get here the file hasn't been closed explicitly by the
user and hadn't been closed implicitly by nextargv(), so
abandon the edit */
SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
const char *temp_pv = SvPVX(*temp_psv);
assert(temp_psv && *temp_psv && SvPOK(*temp_psv));
(void)PerlIO_close(iop);
IoIFP(io) = IoOFP(io) = NULL;
#ifdef ARGV_USE_ATFUNCTIONS
if (dir) {
if (unlinkat(my_dirfd(dir), temp_pv, 0) < 0 &&
NotSupported(errno))
(void)UNLINK(temp_pv);
}
#else
(void)UNLINK(temp_pv);
#endif
}
}
}
#ifdef ARGV_USE_ATFUNCTIONS
if (dir)
closedir(dir);
#endif
}
return 0;
}
static int
S_argvout_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
PERL_UNUSED_ARG(param);
/* ideally we could just remove the magic from the SV but we don't get the SV here */
SvREFCNT_dec(mg->mg_obj);
mg->mg_obj = NULL;
return 0;
}
/* Magic of this type has an AV containing the following:
0: name of the backup file (if any)
1: name of the temp output file
2: name of the original file
3: file mode of the original file
4: pid of the process we opened at, to prevent doing the renaming
etc in both the child and the parent after a fork
If we have useful inode/device ids in stat_t we also keep:
5: a stat of the original current working directory
If we have unlinkat(), renameat(), fchmodat(), dirfd() we also keep:
6: the DIR * for the current directory when we open the file, stored as an IV
*/
static const MGVTBL argvout_vtbl =
{
NULL, /* svt_get */
NULL, /* svt_set */
NULL, /* svt_len */
NULL, /* svt_clear */
S_argvout_free, /* svt_free */
NULL, /* svt_copy */
S_argvout_dup, /* svt_dup */
NULL /* svt_local */
};
PerlIO *
Perl_nextargv(pTHX_ GV *gv, bool nomagicopen)
{
IO * const io = GvIOp(gv);
SV *const old_out_name = PL_inplace ? newSVsv(GvSV(gv)) : NULL;
PERL_ARGS_ASSERT_NEXTARGV;
if (old_out_name)
SAVEFREESV(old_out_name);
if (!PL_argvoutgv)
PL_argvoutgv = gv_fetchpvs("ARGVOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
if (io && (IoFLAGS(io) & (IOf_ARGV|IOf_START)) == (IOf_ARGV|IOf_START)) {
IoFLAGS(io) &= ~IOf_START;
if (PL_inplace) {
assert(PL_defoutgv);
Perl_av_create_and_push(aTHX_ &PL_argvout_stack,
SvREFCNT_inc_simple_NN(PL_defoutgv));
}
}
{
IO * const io = GvIOp(PL_argvoutgv);
if (io && IoIFP(io) && old_out_name) {
do_close(PL_argvoutgv, FALSE);
}
}
PL_lastfd = -1;
PL_filemode = 0;
if (!GvAV(gv))
return NULL;
while (av_tindex(GvAV(gv)) >= 0) {
STRLEN oldlen;
SV *const sv = av_shift(GvAV(gv));
SAVEFREESV(sv);
SvTAINTED_off(GvSVn(gv)); /* previous tainting irrelevant */
sv_setsv(GvSVn(gv),sv);
SvSETMAGIC(GvSV(gv));
PL_oldname = SvPVx(GvSV(gv), oldlen);
if (LIKELY(!PL_inplace)) {
if (nomagicopen
? do_open6(gv, "<", 1, NULL, &GvSV(gv), 1)
: do_open6(gv, PL_oldname, oldlen, NULL, NULL, 0)
) {
return IoIFP(GvIOp(gv));
}
}
else {
Stat_t statbuf;
/* This very long block ends with return IoIFP(GvIOp(gv));
Both this block and the block above fall through on open
failure to the warning code, and then the while loop above tries
the next entry. */
if (do_open_raw(gv, PL_oldname, oldlen, O_RDONLY, 0, &statbuf)) {
#ifndef FLEXFILENAMES
int filedev;
int fileino;
#endif
#ifdef ARGV_USE_ATFUNCTIONS
DIR *curdir;
#endif
Uid_t fileuid;
Gid_t filegid;
AV *magic_av = NULL;
SV *temp_name_sv = NULL;
MAGIC *mg;
TAINT_PROPER("inplace open");
if (oldlen == 1 && *PL_oldname == '-') {
setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL,
SVt_PVIO));
return IoIFP(GvIOp(gv));
}
#ifndef FLEXFILENAMES
filedev = statbuf.st_dev;
fileino = statbuf.st_ino;
#endif
PL_filemode = statbuf.st_mode;
fileuid = statbuf.st_uid;
filegid = statbuf.st_gid;
if (!S_ISREG(PL_filemode)) {
Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
"Can't do inplace edit: %s is not a regular file",
PL_oldname );
do_close(gv,FALSE);
continue;
}
magic_av = newAV();
if (*PL_inplace && strNE(PL_inplace, "*")) {
const char *star = strchr(PL_inplace, '*');
if (star) {
const char *begin = PL_inplace;
SvPVCLEAR(sv);
do {
sv_catpvn(sv, begin, star - begin);
sv_catpvn(sv, PL_oldname, oldlen);
begin = ++star;
} while ((star = strchr(begin, '*')));
if (*begin)
sv_catpv(sv,begin);
}
else {
sv_catpv(sv,PL_inplace);
}
#ifndef FLEXFILENAMES
if ((PerlLIO_stat(SvPVX_const(sv),&statbuf) >= 0
&& statbuf.st_dev == filedev
&& statbuf.st_ino == fileino)
#ifdef DJGPP
|| ((_djstat_fail_bits & _STFAIL_TRUENAME)!=0)
#endif
)
{
Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
"Can't do inplace edit: %"
SVf " would not be unique",
SVfARG(sv));
goto cleanup_argv;
}
#endif
av_store(magic_av, ARGVMG_BACKUP_NAME, newSVsv(sv));
}
sv_setpvn(sv,PL_oldname,oldlen);
SETERRNO(0,0); /* in case sprintf set errno */
temp_name_sv = newSV(0);
if (!S_openindirtemp(aTHX_ PL_argvoutgv, GvSV(gv), temp_name_sv)) {
SvREFCNT_dec(temp_name_sv);
/* diag_listed_as: Can't do inplace edit on %s: %s */
Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit on %s: Cannot make temp name: %s",
PL_oldname, Strerror(errno) );
#ifndef FLEXFILENAMES
cleanup_argv:
#endif
do_close(gv,FALSE);
SvREFCNT_dec(magic_av);
continue;
}
av_store(magic_av, ARGVMG_TEMP_NAME, temp_name_sv);
av_store(magic_av, ARGVMG_ORIG_NAME, newSVsv(sv));
av_store(magic_av, ARGVMG_ORIG_MODE, newSVuv(PL_filemode));
av_store(magic_av, ARGVMG_ORIG_PID, newSViv((IV)PerlProc_getpid()));
#if defined(ARGV_USE_ATFUNCTIONS)
curdir = opendir(".");
av_store(magic_av, ARGVMG_ORIG_DIRP, newSViv(PTR2IV(curdir)));
#elif defined(ARGV_USE_STAT_INO)
if (PerlLIO_stat(".", &statbuf) >= 0) {
av_store(magic_av, ARGVMG_ORIG_CWD_STAT,
newSVpvn((char *)&statbuf, sizeof(statbuf)));
}
#endif
setdefout(PL_argvoutgv);
sv_setsv(GvSVn(PL_argvoutgv), temp_name_sv);
mg = sv_magicext((SV*)GvIOp(PL_argvoutgv), (SV*)magic_av, PERL_MAGIC_uvar, &argvout_vtbl, NULL, 0);
mg->mg_flags |= MGf_DUP;
SvREFCNT_dec(magic_av);
PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv)));
if (PL_lastfd >= 0) {
(void)PerlLIO_fstat(PL_lastfd,&statbuf);
#ifdef HAS_FCHMOD
(void)fchmod(PL_lastfd,PL_filemode);
#else
(void)PerlLIO_chmod(PL_oldname,PL_filemode);
#endif
if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
/* XXX silently ignore failures */
#ifdef HAS_FCHOWN
PERL_UNUSED_RESULT(fchown(PL_lastfd,fileuid,filegid));
#elif defined(HAS_CHOWN)
PERL_UNUSED_RESULT(PerlLIO_chown(PL_oldname,fileuid,filegid));
#endif
}
}
return IoIFP(GvIOp(gv));
}
} /* successful do_open_raw(), PL_inplace non-NULL */
if (ckWARN_d(WARN_INPLACE)) {
const int eno = errno;
Stat_t statbuf;
if (PerlLIO_stat(PL_oldname, &statbuf) >= 0
&& !S_ISREG(statbuf.st_mode)) {
Perl_warner(aTHX_ packWARN(WARN_INPLACE),
"Can't do inplace edit: %s is not a regular file",
PL_oldname);
}
else {
Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't open %s: %s",
PL_oldname, Strerror(eno));
}
}
}
if (io && (IoFLAGS(io) & IOf_ARGV))
IoFLAGS(io) |= IOf_START;
if (PL_inplace) {
if (io && (IoFLAGS(io) & IOf_ARGV)
&& PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0)
{
GV * const oldout = MUTABLE_GV(av_pop(PL_argvout_stack));
setdefout(oldout);
SvREFCNT_dec_NN(oldout);
return NULL;
}
setdefout(gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO));
}
return NULL;
}
#ifdef ARGV_USE_ATFUNCTIONS
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
/* FreeBSD 11 renameat() mis-behaves strangely with absolute paths in cases where the
* equivalent rename() succeeds
*/
static int
S_my_renameat(int olddfd, const char *oldpath, int newdfd, const char *newpath) {
/* this is intended only for use in Perl_do_close() */
assert(olddfd == newdfd);
assert(PERL_FILE_IS_ABSOLUTE(oldpath) == PERL_FILE_IS_ABSOLUTE(newpath));
if (PERL_FILE_IS_ABSOLUTE(oldpath)) {
return PerlLIO_rename(oldpath, newpath);
}
else {
return renameat(olddfd, oldpath, newdfd, newpath);
}
}
# else
# define S_my_renameat(dh1, pv1, dh2, pv2) renameat((dh1), (pv1), (dh2), (pv2))
# endif /* if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */
#endif
static bool
S_dir_unchanged(pTHX_ const char *orig_pv, MAGIC *mg) {
Stat_t statbuf;
#ifdef ARGV_USE_STAT_INO
SV **stat_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_CWD_STAT, FALSE);
Stat_t *orig_cwd_stat = stat_psv && *stat_psv ? (Stat_t *)SvPVX(*stat_psv) : NULL;
/* if the path is absolute the possible moving of cwd (which the file
might be in) isn't our problem.
This code tries to be reasonably balanced about detecting a changed
CWD, if we have the information needed to check that curdir has changed, we
check it
*/
if (!PERL_FILE_IS_ABSOLUTE(orig_pv)
&& orig_cwd_stat
&& PerlLIO_stat(".", &statbuf) >= 0
&& ( statbuf.st_dev != orig_cwd_stat->st_dev
|| statbuf.st_ino != orig_cwd_stat->st_ino)) {
Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s",
orig_pv, "Current directory has changed");
}
#else
SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
/* Some platforms don't have useful st_ino etc, so just
check we can see the work file.
*/
if (!PERL_FILE_IS_ABSOLUTE(orig_pv)
&& PerlLIO_stat(SvPVX(*temp_psv), &statbuf) < 0) {
Perl_croak(aTHX_ "Cannot complete in-place edit of %s: %s",
orig_pv,
"Work file is missing - did you change directory?");
}
#endif
return TRUE;
}
#define dir_unchanged(orig_psv, mg) \
S_dir_unchanged(aTHX_ (orig_psv), (mg))
STATIC bool
S_argvout_final(pTHX_ MAGIC *mg, IO *io, bool not_implicit) {
bool retval;
/* ensure args are checked before we start using them */
PERL_ARGS_ASSERT_ARGVOUT_FINAL;
{
/* handle to an in-place edit work file */
SV **back_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_BACKUP_NAME, FALSE);
SV **temp_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_TEMP_NAME, FALSE);
/* PL_oldname may have been modified by a nested ARGV use at this point */
SV **orig_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_NAME, FALSE);
SV **mode_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_MODE, FALSE);
SV **pid_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_PID, FALSE);
#if defined(ARGV_USE_ATFUNCTIONS)
SV **dir_psv = av_fetch((AV*)mg->mg_obj, ARGVMG_ORIG_DIRP, FALSE);
DIR *dir;
int dfd;
#endif
UV mode;
int fd;
const char *orig_pv;
assert(temp_psv && *temp_psv);
assert(orig_psv && *orig_psv);
assert(mode_psv && *mode_psv);
assert(pid_psv && *pid_psv);
#ifdef ARGV_USE_ATFUNCTIONS
assert(dir_psv && *dir_psv);
dir = INT2PTR(DIR *, SvIVX(*dir_psv));
dfd = my_dirfd(dir);
#endif
orig_pv = SvPVX(*orig_psv);
mode = SvUV(*mode_psv);
if ((mode & (S_ISUID|S_ISGID)) != 0
&& (fd = PerlIO_fileno(IoIFP(io))) >= 0) {
(void)PerlIO_flush(IoIFP(io));
#ifdef HAS_FCHMOD
(void)fchmod(fd, mode);
#else
(void)PerlLIO_chmod(orig_pv, mode);
#endif
}
retval = io_close(io, NULL, not_implicit, FALSE);
if (SvIV(*pid_psv) != (IV)PerlProc_getpid()) {
/* this is a child process, don't duplicate our rename() etc
processing below */
goto freext;
}
if (retval) {
#if defined(DOSISH) || defined(__CYGWIN__)
if (PL_argvgv && GvIOp(PL_argvgv)
&& IoIFP(GvIOp(PL_argvgv))
&& (IoFLAGS(GvIOp(PL_argvgv)) & (IOf_ARGV|IOf_START)) == IOf_ARGV) {
do_close(PL_argvgv, FALSE);
}
#endif
#ifndef ARGV_USE_ATFUNCTIONS
if (!dir_unchanged(orig_pv, mg))
goto abort_inplace;
#endif
if (back_psv && *back_psv) {
#if defined(HAS_LINK) && !defined(DOSISH) && !defined(__CYGWIN__) && defined(HAS_RENAME)
if (
# ifdef ARGV_USE_ATFUNCTIONS
linkat(dfd, orig_pv, dfd, SvPVX(*back_psv), 0) < 0 &&
!(UNLIKELY(NotSupported(errno)) &&
dir_unchanged(orig_pv, mg) &&
link(orig_pv, SvPVX(*back_psv)) == 0)
# else
link(orig_pv, SvPVX(*back_psv)) < 0
# endif
)
#endif
{
#ifdef HAS_RENAME
if (
# ifdef ARGV_USE_ATFUNCTIONS
S_my_renameat(dfd, orig_pv, dfd, SvPVX(*back_psv)) < 0 &&
!(UNLIKELY(NotSupported(errno)) &&
dir_unchanged(orig_pv, mg) &&
PerlLIO_rename(orig_pv, SvPVX(*back_psv)) == 0)
# else
PerlLIO_rename(orig_pv, SvPVX(*back_psv)) < 0
# endif
) {
if (!not_implicit) {
# ifdef ARGV_USE_ATFUNCTIONS
if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 &&
UNLIKELY(NotSupported(errno)) &&
dir_unchanged(orig_pv, mg))
(void)UNLINK(SvPVX_const(*temp_psv));
# else
UNLINK(SvPVX(*temp_psv));
# endif
Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file",
SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno));
}
/* should we warn here? */
goto abort_inplace;
}
#else
(void)UNLINK(SvPVX(*back_psv));
if (link(orig_pv, SvPVX(*back_psv))) {
if (!not_implicit) {
Perl_croak(aTHX_ "Can't rename %s to %s: %s, skipping file",
SvPVX(*orig_psv), SvPVX(*back_psv), Strerror(errno));
}
goto abort_inplace;
}
/* we need to use link() to get the temp into place too, and linK()
fails if the new link name exists */
(void)UNLINK(orig_pv);
#endif
}
}
#if defined(DOSISH) || defined(__CYGWIN__) || !defined(HAS_RENAME)
else {
UNLINK(orig_pv);
}
#endif
if (
#if !defined(HAS_RENAME)
link(SvPVX(*temp_psv), orig_pv) < 0
#elif defined(ARGV_USE_ATFUNCTIONS)
S_my_renameat(dfd, SvPVX(*temp_psv), dfd, orig_pv) < 0 &&
!(UNLIKELY(NotSupported(errno)) &&
dir_unchanged(orig_pv, mg) &&
PerlLIO_rename(SvPVX(*temp_psv), orig_pv) == 0)
#else
PerlLIO_rename(SvPVX(*temp_psv), orig_pv) < 0
#endif
) {
if (!not_implicit) {
#ifdef ARGV_USE_ATFUNCTIONS
if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) < 0 &&
NotSupported(errno))
UNLINK(SvPVX(*temp_psv));
#else
UNLINK(SvPVX(*temp_psv));
#endif
/* diag_listed_as: Cannot complete in-place edit of %s: %s */
Perl_croak(aTHX_ "Cannot complete in-place edit of %s: failed to rename work file '%s' to '%s': %s",
orig_pv, SvPVX(*temp_psv), orig_pv, Strerror(errno));
}
abort_inplace:
UNLINK(SvPVX_const(*temp_psv));
retval = FALSE;
}
#ifndef HAS_RENAME
UNLINK(SvPVX(*temp_psv));
#endif
}
else {
#ifdef ARGV_USE_ATFUNCTIONS
if (unlinkat(dfd, SvPVX_const(*temp_psv), 0) &&
NotSupported(errno))
UNLINK(SvPVX_const(*temp_psv));
#else
UNLINK(SvPVX_const(*temp_psv));
#endif
if (!not_implicit) {
Perl_croak(aTHX_ "Failed to close in-place work file %s: %s",
SvPVX(*temp_psv), Strerror(errno));
}
}
freext:
;
}
return retval;
}
/* explicit renamed to avoid C++ conflict -- kja */
bool
Perl_do_close(pTHX_ GV *gv, bool not_implicit)
{
bool retval;
IO *io;
MAGIC *mg;
if (!gv)
gv = PL_argvgv;
if (!gv || !isGV_with_GP(gv)) {
if (not_implicit)
SETERRNO(EBADF,SS_IVCHAN);
return FALSE;
}
io = GvIO(gv);
if (!io) { /* never opened */
if (not_implicit) {
report_evil_fh(gv);
SETERRNO(EBADF,SS_IVCHAN);
}
return FALSE;
}
if ((mg = mg_findext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl))
&& mg->mg_obj) {
retval = argvout_final(mg, io, not_implicit);
mg_freeext((SV*)io, PERL_MAGIC_uvar, &argvout_vtbl);
}
else {
retval = io_close(io, NULL, not_implicit, FALSE);
}
if (not_implicit) {
IoLINES(io) = 0;
IoPAGE(io) = 0;
IoLINES_LEFT(io) = IoPAGE_LEN(io);
}
IoTYPE(io) = IoTYPE_CLOSED;
return retval;
}
bool
Perl_io_close(pTHX_ IO *io, GV *gv, bool not_implicit, bool warn_on_fail)
{
bool retval = FALSE;
PERL_ARGS_ASSERT_IO_CLOSE;
if (IoIFP(io)) {
if (IoTYPE(io) == IoTYPE_PIPE) {
const int status = PerlProc_pclose(IoIFP(io));
if (not_implicit) {
STATUS_NATIVE_CHILD_SET(status);
retval = (STATUS_UNIX == 0);
}
else {
retval = (status != -1);
}
}
else if (IoTYPE(io) == IoTYPE_STD)
retval = TRUE;
else {
if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */
const bool prev_err = PerlIO_error(IoOFP(io));
#ifdef USE_PERLIO
if (prev_err)
PerlIO_restore_errno(IoOFP(io));
#endif
retval = (PerlIO_close(IoOFP(io)) != EOF && !prev_err);
PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */
}
else {
const bool prev_err = PerlIO_error(IoIFP(io));
#ifdef USE_PERLIO
if (prev_err)
PerlIO_restore_errno(IoIFP(io));
#endif
retval = (PerlIO_close(IoIFP(io)) != EOF && !prev_err);
}
}
IoOFP(io) = IoIFP(io) = NULL;
if (warn_on_fail && !retval) {
if (gv)
Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
"Warning: unable to close filehandle %"
HEKf " properly: %" SVf,
HEKfARG(GvNAME_HEK(gv)),
SVfARG(get_sv("!",GV_ADD)));
else
Perl_ck_warner_d(aTHX_ packWARN(WARN_IO),
"Warning: unable to close filehandle "
"properly: %" SVf,
SVfARG(get_sv("!",GV_ADD)));
}
}
else if (not_implicit) {
SETERRNO(EBADF,SS_IVCHAN);
}
return retval;
}
bool
Perl_do_eof(pTHX_ GV *gv)
{
IO * const io = GvIO(gv);
PERL_ARGS_ASSERT_DO_EOF;
if (!io)
return TRUE;
else if (IoTYPE(io) == IoTYPE_WRONLY)
report_wrongway_fh(gv, '>');
while (IoIFP(io)) {
if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */
if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */
return FALSE; /* this is the most usual case */
}
{
/* getc and ungetc can stomp on errno */
dSAVE_ERRNO;
const int ch = PerlIO_getc(IoIFP(io));
if (ch != EOF) {
(void)PerlIO_ungetc(IoIFP(io),ch);
RESTORE_ERRNO;
return FALSE;
}
RESTORE_ERRNO;
}
if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) {
if (PerlIO_get_cnt(IoIFP(io)) < -1)
PerlIO_set_cnt(IoIFP(io),-1);
}
if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */
if (gv != PL_argvgv || !nextargv(gv, FALSE)) /* get another fp handy */
return TRUE;
}
else
return TRUE; /* normal fp, definitely end of file */
}
return TRUE;
}
Off_t
Perl_do_tell(pTHX_ GV *gv)
{
IO *const io = GvIO(gv);
PerlIO *fp;
PERL_ARGS_ASSERT_DO_TELL;
if (io && (fp = IoIFP(io))) {
return PerlIO_tell(fp);
}
report_evil_fh(gv);
SETERRNO(EBADF,RMS_IFI);
return (Off_t)-1;
}
bool
Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
{
IO *const io = GvIO(gv);
PerlIO *fp;
if (io && (fp = IoIFP(io))) {
return PerlIO_seek(fp, pos, whence) >= 0;
}
report_evil_fh(gv);
SETERRNO(EBADF,RMS_IFI);
return FALSE;
}
Off_t
Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
{
IO *const io = GvIO(gv);
PerlIO *fp;
PERL_ARGS_ASSERT_DO_SYSSEEK;
if (io && (fp = IoIFP(io))) {
int fd = PerlIO_fileno(fp);
if (fd < 0 || (whence == SEEK_SET && pos < 0)) {
SETERRNO(EINVAL,LIB_INVARG);
return -1;
} else {
return PerlLIO_lseek(fd, pos, whence);
}
}
report_evil_fh(gv);
SETERRNO(EBADF,RMS_IFI);
return (Off_t)-1;
}
int
Perl_mode_from_discipline(pTHX_ const char *s, STRLEN len)
{
int mode = O_BINARY;
PERL_UNUSED_CONTEXT;
if (s) {
while (*s) {
if (*s == ':') {
switch (s[1]) {
case 'r':
if (s[2] == 'a' && s[3] == 'w'
&& (!s[4] || s[4] == ':' || isSPACE(s[4])))
{
mode = O_BINARY;
s += 4;
len -= 4;
break;
}
/* FALLTHROUGH */
case 'c':
if (s[2] == 'r' && s[3] == 'l' && s[4] == 'f'
&& (!s[5] || s[5] == ':' || isSPACE(s[5])))
{
mode = O_TEXT;
s += 5;
len -= 5;
break;
}
/* FALLTHROUGH */
default:
goto fail_discipline;
}
}
else if (isSPACE(*s)) {
++s;
--len;
}
else {
const char *end;
fail_discipline:
end = (char *) memchr(s+1, ':', len);
if (!end)
end = s+len;
#ifndef PERLIO_LAYERS
Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s);
#else
len -= end-s;
s = end;
#endif
}
}
}
return mode;
}
#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE)
I32
my_chsize(int fd, Off_t length)
{
#ifdef F_FREESP
/* code courtesy of William Kucharski */
#define HAS_CHSIZE
Stat_t filebuf;
if (PerlLIO_fstat(fd, &filebuf) < 0)
return -1;
if (filebuf.st_size < length) {
/* extend file length */
if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0)
return -1;
/* write a "0" byte */
if ((PerlLIO_write(fd, "", 1)) != 1)
return -1;
}
else {
/* truncate length */
struct flock fl;
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = length;
fl.l_type = F_WRLCK; /* write lock on file space */
/*
* This relies on the UNDOCUMENTED F_FREESP argument to
* fcntl(2), which truncates the file so that it ends at the
* position indicated by fl.l_start.
*
* Will minor miracles never cease?
*/
if (fcntl(fd, F_FREESP, &fl) < 0)
return -1;
}
return 0;
#else
Perl_croak_nocontext("truncate not implemented");
#endif /* F_FREESP */
return -1;
}
#endif /* !HAS_TRUNCATE && !HAS_CHSIZE */
bool
Perl_do_print(pTHX_ SV *sv, PerlIO *fp)
{
PERL_ARGS_ASSERT_DO_PRINT;
/* assuming fp is checked earlier */
if (!sv)
return TRUE;
if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) {
assert(!SvGMAGICAL(sv));
if (SvIsUV(sv))
PerlIO_printf(fp, "%" UVuf, (UV)SvUVX(sv));
else
PerlIO_printf(fp, "%" IVdf, (IV)SvIVX(sv));
return !PerlIO_error(fp);
}
else {
STRLEN len;
/* Do this first to trigger any overloading. */
const char *tmps = SvPV_const(sv, len);
U8 *tmpbuf = NULL;
bool happy = TRUE;
if (PerlIO_isutf8(fp)) { /* If the stream is utf8 ... */
if (!SvUTF8(sv)) { /* Convert to utf8 if necessary */
/* We don't modify the original scalar. */
tmpbuf = bytes_to_utf8((const U8*) tmps, &len);
tmps = (char *) tmpbuf;
}
else if (ckWARN4_d(WARN_UTF8, WARN_SURROGATE, WARN_NON_UNICODE, WARN_NONCHAR)) {
(void) check_utf8_print((const U8*) tmps, len);
}
} /* else stream isn't utf8 */
else if (DO_UTF8(sv)) { /* But if is utf8 internally, attempt to
convert to bytes */
STRLEN tmplen = len;
bool utf8 = TRUE;
U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8);
if (!utf8) {
/* Here, succeeded in downgrading from utf8. Set up to below
* output the converted value */
tmpbuf = result;
tmps = (char *) tmpbuf;
len = tmplen;
}
else { /* Non-utf8 output stream, but string only representable in
utf8 */
assert((char *)result == tmps);
Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8),
"Wide character in %s",
PL_op ? OP_DESC(PL_op) : "print"
);
/* Could also check that isn't one of the things to avoid
* in utf8 by using check_utf8_print(), but not doing so,
* since the stream isn't a UTF8 stream */
}
}
/* To detect whether the process is about to overstep its
* filesize limit we would need getrlimit(). We could then
* also transparently raise the limit with setrlimit() --
* but only until the system hard limit/the filesystem limit,
* at which we would get EPERM. Note that when using buffered
* io the write failure can be delayed until the flush/close. --jhi */
if (len && (PerlIO_write(fp,tmps,len) == 0))
happy = FALSE;
Safefree(tmpbuf);
return happy ? !PerlIO_error(fp) : FALSE;
}
}
I32
Perl_my_stat_flags(pTHX_ const U32 flags)
{
dSP;
IO *io;
GV* gv;
if (PL_op->op_flags & OPf_REF) {
gv = cGVOP_gv;
do_fstat:
if (gv == PL_defgv) {
if (PL_laststatval < 0)
SETERRNO(EBADF,RMS_IFI);
return PL_laststatval;
}
io = GvIO(gv);
do_fstat_have_io:
PL_laststype = OP_STAT;
PL_statgv = gv ? gv : (GV *)io;
SvPVCLEAR(PL_statname);
if (io) {
if (IoIFP(io)) {
int fd = PerlIO_fileno(IoIFP(io));
if (fd < 0) {
/* E.g. PerlIO::scalar has no real fd. */
SETERRNO(EBADF,RMS_IFI);
return (PL_laststatval = -1);
} else {
return (PL_laststatval = PerlLIO_fstat(fd, &PL_statcache));
}
} else if (IoDIRP(io)) {
return (PL_laststatval = PerlLIO_fstat(my_dirfd(IoDIRP(io)), &PL_statcache));
}
}
PL_laststatval = -1;
report_evil_fh(gv);
SETERRNO(EBADF,RMS_IFI);
return -1;
}
else if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
== OPpFT_STACKED)
return PL_laststatval;
else {
SV* const sv = TOPs;
const char *s, *d;
STRLEN len;
if ((gv = MAYBE_DEREF_GV_flags(sv,flags))) {
goto do_fstat;
}
else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) {
io = MUTABLE_IO(SvRV(sv));
gv = NULL;
goto do_fstat_have_io;
}
s = SvPV_flags_const(sv, len, flags);
PL_statgv = NULL;
sv_setpvn(PL_statname, s, len);
d = SvPVX_const(PL_statname); /* s now NUL-terminated */
PL_laststype = OP_STAT;
if (!IS_SAFE_PATHNAME(s, len, OP_NAME(PL_op))) {
PL_laststatval = -1;
}
else {
PL_laststatval = PerlLIO_stat(d, &PL_statcache);
}
if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(s)) {
GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "stat");
GCC_DIAG_RESTORE_STMT;
}
return PL_laststatval;
}
}
I32
Perl_my_lstat_flags(pTHX_ const U32 flags)
{
static const char* const no_prev_lstat = "The stat preceding -l _ wasn't an lstat";
dSP;
const char *file;
STRLEN len;
SV* const sv = TOPs;
bool isio = FALSE;
if (PL_op->op_flags & OPf_REF) {
if (cGVOP_gv == PL_defgv) {
if (PL_laststype != OP_LSTAT)
Perl_croak(aTHX_ "%s", no_prev_lstat);
if (PL_laststatval < 0)
SETERRNO(EBADF,RMS_IFI);
return PL_laststatval;
}
PL_laststatval = -1;
if (ckWARN(WARN_IO)) {
/* diag_listed_as: Use of -l on filehandle%s */
Perl_warner(aTHX_ packWARN(WARN_IO),
"Use of -l on filehandle %" HEKf,
HEKfARG(GvENAME_HEK(cGVOP_gv)));
}
SETERRNO(EBADF,RMS_IFI);
return -1;
}
if ((PL_op->op_private & (OPpFT_STACKED|OPpFT_AFTER_t))
== OPpFT_STACKED) {
if (PL_laststype != OP_LSTAT)
Perl_croak(aTHX_ "%s", no_prev_lstat);
return PL_laststatval;
}
PL_laststype = OP_LSTAT;
PL_statgv = NULL;
if ( ( (SvROK(sv) && ( isGV_with_GP(SvRV(sv))
|| (isio = SvTYPE(SvRV(sv)) == SVt_PVIO) )
)
|| isGV_with_GP(sv)
)
&& ckWARN(WARN_IO)) {
if (isio)
/* diag_listed_as: Use of -l on filehandle%s */
Perl_warner(aTHX_ packWARN(WARN_IO),
"Use of -l on filehandle");
else
/* diag_listed_as: Use of -l on filehandle%s */
Perl_warner(aTHX_ packWARN(WARN_IO),
"Use of -l on filehandle %" HEKf,
HEKfARG(GvENAME_HEK((const GV *)
(SvROK(sv) ? SvRV(sv) : sv))));
}
file = SvPV_flags_const(sv, len, flags);
sv_setpv(PL_statname,file);
if (!IS_SAFE_PATHNAME(file, len, OP_NAME(PL_op))) {
PL_laststatval = -1;
}
else {
PL_laststatval = PerlLIO_lstat(file,&PL_statcache);
}
if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && should_warn_nl(file)) {
GCC_DIAG_IGNORE_STMT(-Wformat-nonliteral); /* PL_warn_nl is constant */
Perl_warner(aTHX_ packWARN(WARN_NEWLINE), PL_warn_nl, "lstat");
GCC_DIAG_RESTORE_STMT;
}
return PL_laststatval;
}
static void
S_exec_failed(pTHX_ const char *cmd, int fd, int do_report)
{
const int e = errno;
PERL_ARGS_ASSERT_EXEC_FAILED;
if (ckWARN(WARN_EXEC))
Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s",
cmd, Strerror(e));
if (do_report) {
/* XXX silently ignore failures */
PERL_UNUSED_RESULT(PerlLIO_write(fd, (void*)&e, sizeof(int)));
PerlLIO_close(fd);
}
}
bool
Perl_do_aexec5(pTHX_ SV *really, SV **mark, SV **sp,
int fd, int do_report)
{
dVAR;
PERL_ARGS_ASSERT_DO_AEXEC5;
#if defined(__SYMBIAN32__) || defined(__LIBCATAMOUNT__)
Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system");
#else
assert(sp >= mark);
ENTER;
{
const char **argv, **a;
const char *tmps = NULL;
Newx(argv, sp - mark + 1, const char*);
SAVEFREEPV(argv);
a = argv;
while (++mark <= sp) {
if (*mark) {
char *arg = savepv(SvPV_nolen_const(*mark));
SAVEFREEPV(arg);
*a++ = arg;
} else
*a++ = "";
}
*a = NULL;
if (really) {
tmps = savepv(SvPV_nolen_const(really));
SAVEFREEPV(tmps);
}
if ((!really && argv[0] && *argv[0] != '/') ||
(really && *tmps != '/')) /* will execvp use PATH? */
TAINT_ENV(); /* testing IFS here is overkill, probably */
PERL_FPU_PRE_EXEC
if (really && *tmps) {
PerlProc_execvp(tmps,EXEC_ARGV_CAST(argv));
} else if (argv[0]) {
PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv));
} else {
SETERRNO(ENOENT,RMS_FNF);
}
PERL_FPU_POST_EXEC
S_exec_failed(aTHX_ (really ? tmps : argv[0] ? argv[0] : ""), fd, do_report);
}
LEAVE;
#endif
return FALSE;
}
#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
bool
Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report)
{
dVAR;
const char **argv, **a;
char *s;
char *buf;
char *cmd;
/* Make a copy so we can change it */
const Size_t cmdlen = strlen(incmd) + 1;
PERL_ARGS_ASSERT_DO_EXEC3;
ENTER;
Newx(buf, cmdlen, char);
SAVEFREEPV(buf);
cmd = buf;
memcpy(cmd, incmd, cmdlen);
while (*cmd && isSPACE(*cmd))
cmd++;
/* save an extra exec if possible */
#ifdef CSH
{
char flags[PERL_FLAGS_MAX];
if (strnEQ(cmd,PL_cshname,PL_cshlen) &&
strBEGINs(cmd+PL_cshlen," -c")) {
my_strlcpy(flags, "-c", PERL_FLAGS_MAX);
s = cmd+PL_cshlen+3;
if (*s == 'f') {
s++;
my_strlcat(flags, "f", PERL_FLAGS_MAX - 2);
}
if (*s == ' ')
s++;
if (*s++ == '\'') {
char * const ncmd = s;
while (*s)
s++;
if (s[-1] == '\n')
*--s = '\0';
if (s[-1] == '\'') {
*--s = '\0';
PERL_FPU_PRE_EXEC
PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL);
PERL_FPU_POST_EXEC
*s = '\'';
S_exec_failed(aTHX_ PL_cshname, fd, do_report);
goto leave;
}
}
}
}
#endif /* CSH */
/* see if there are shell metacharacters in it */
if (*cmd == '.' && isSPACE(cmd[1]))
goto doshell;
if (strBEGINs(cmd,"exec") && isSPACE(cmd[4]))
goto doshell;
s = cmd;
while (isWORDCHAR(*s))
s++; /* catch VAR=val gizmo */
if (*s == '=')
goto doshell;
for (s = cmd; *s; s++) {
if (*s != ' ' && !isALPHA(*s) &&
strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) {
if (*s == '\n' && !s[1]) {
*s = '\0';
break;
}
/* handle the 2>&1 construct at the end */
if (*s == '>' && s[1] == '&' && s[2] == '1'
&& s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2])
&& (!s[3] || isSPACE(s[3])))
{
const char *t = s + 3;
while (*t && isSPACE(*t))
++t;
if (!*t && (PerlLIO_dup2(1,2) != -1)) {
s[-2] = '\0';
break;
}
}
doshell:
PERL_FPU_PRE_EXEC
PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL);
PERL_FPU_POST_EXEC
S_exec_failed(aTHX_ PL_sh_path, fd, do_report);
goto leave;
}
}
Newx(argv, (s - cmd) / 2 + 2, const char*);
SAVEFREEPV(argv);
cmd = savepvn(cmd, s-cmd);
SAVEFREEPV(cmd);
a = argv;
for (s = cmd; *s;) {
while (isSPACE(*s))
s++;
if (*s)
*(a++) = s;
while (*s && !isSPACE(*s))
s++;
if (*s)
*s++ = '\0';
}
*a = NULL;
if (argv[0]) {
PERL_FPU_PRE_EXEC
PerlProc_execvp(argv[0],EXEC_ARGV_CAST(argv));
PERL_FPU_POST_EXEC
if (errno == ENOEXEC) /* for system V NIH syndrome */
goto doshell;
S_exec_failed(aTHX_ argv[0], fd, do_report);
}
leave:
LEAVE;
return FALSE;
}
#endif /* OS2 || WIN32 */
I32
Perl_apply(pTHX_ I32 type, SV **mark, SV **sp)
{
I32 val;
I32 tot = 0;
const char *const what = PL_op_name[type];
const char *s;
STRLEN len;
SV ** const oldmark = mark;
bool killgp = FALSE;
PERL_ARGS_ASSERT_APPLY;
PERL_UNUSED_VAR(what); /* may not be used depending on compile options */
/* Doing this ahead of the switch statement preserves the old behaviour,
where attempting to use kill as a taint test test would fail on
platforms where kill was not defined. */
#ifndef HAS_KILL
if (type == OP_KILL)
Perl_die(aTHX_ PL_no_func, what);
#endif
#ifndef HAS_CHOWN
if (type == OP_CHOWN)
Perl_die(aTHX_ PL_no_func, what);
#endif
#define APPLY_TAINT_PROPER() \
STMT_START { \
if (TAINT_get) { TAINT_PROPER(what); } \
} STMT_END
/* This is a first heuristic; it doesn't catch tainting magic. */
if (TAINTING_get) {
while (++mark <= sp) {
if (SvTAINTED(*mark)) {
TAINT;
break;
}
}
mark = oldmark;
}
switch (type) {
case OP_CHMOD:
APPLY_TAINT_PROPER();
if (++mark <= sp) {
val = SvIV(*mark);
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
GV* gv;
if ((gv = MAYBE_DEREF_GV(*mark))) {
if (GvIO(gv) && IoIFP(GvIOp(gv))) {
#ifdef HAS_FCHMOD
int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
APPLY_TAINT_PROPER();
if (fd < 0) {
SETERRNO(EBADF,RMS_IFI);
tot--;
} else if (fchmod(fd, val))
tot--;
#else
Perl_die(aTHX_ PL_no_func, "fchmod");
#endif
}
else {
SETERRNO(EBADF,RMS_IFI);
tot--;
}
}
else {
const char *name = SvPV_nomg_const(*mark, len);
APPLY_TAINT_PROPER();
if (!IS_SAFE_PATHNAME(name, len, "chmod") ||
PerlLIO_chmod(name, val)) {
tot--;
}
}
}
}
break;
#ifdef HAS_CHOWN
case OP_CHOWN:
APPLY_TAINT_PROPER();
if (sp - mark > 2) {
I32 val2;
val = SvIVx(*++mark);
val2 = SvIVx(*++mark);
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
GV* gv;
if ((gv = MAYBE_DEREF_GV(*mark))) {
if (GvIO(gv) && IoIFP(GvIOp(gv))) {
#ifdef HAS_FCHOWN
int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
APPLY_TAINT_PROPER();
if (fd < 0) {
SETERRNO(EBADF,RMS_IFI);
tot--;
} else if (fchown(fd, val, val2))
tot--;
#else
Perl_die(aTHX_ PL_no_func, "fchown");
#endif
}
else {
SETERRNO(EBADF,RMS_IFI);
tot--;
}
}
else {
const char *name = SvPV_nomg_const(*mark, len);
APPLY_TAINT_PROPER();
if (!IS_SAFE_PATHNAME(name, len, "chown") ||
PerlLIO_chown(name, val, val2)) {
tot--;
}
}
}
}
break;
#endif
/*
XXX Should we make lchown() directly available from perl?
For now, we'll let Configure test for HAS_LCHOWN, but do
nothing in the core.
--AD 5/1998
*/
#ifdef HAS_KILL
case OP_KILL:
APPLY_TAINT_PROPER();
if (mark == sp)
break;
s = SvPVx_const(*++mark, len);
if (*s == '-' && isALPHA(s[1]))
{
s++;
len--;
killgp = TRUE;
}
if (isALPHA(*s)) {
if (*s == 'S' && s[1] == 'I' && s[2] == 'G') {
s += 3;
len -= 3;
}
if ((val = whichsig_pvn(s, len)) < 0)
Perl_croak(aTHX_ "Unrecognized signal name \"%" SVf "\"",
SVfARG(*mark));
}
else
{
val = SvIV(*mark);
if (val < 0)
{
killgp = TRUE;
val = -val;
}
}
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
Pid_t proc;
SvGETMAGIC(*mark);
if (!(SvNIOK(*mark) || looks_like_number(*mark)))
Perl_croak(aTHX_ "Can't kill a non-numeric process ID");
proc = SvIV_nomg(*mark);
APPLY_TAINT_PROPER();
#ifdef HAS_KILLPG
/* use killpg in preference, as the killpg() wrapper for Win32
* understands process groups, but the kill() wrapper doesn't */
if (killgp ? PerlProc_killpg(proc, val)
: PerlProc_kill(proc, val))
#else
if (PerlProc_kill(killgp ? -proc: proc, val))
#endif
tot--;
}
PERL_ASYNC_CHECK();
break;
#endif
case OP_UNLINK:
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
s = SvPV_const(*mark, len);
APPLY_TAINT_PROPER();
if (!IS_SAFE_PATHNAME(s, len, "unlink")) {
tot--;
}
else if (PL_unsafe) {
if (UNLINK(s))
{
tot--;
}
#if defined(__amigaos4__) && defined(NEWLIB)
else
{
/* Under AmigaOS4 unlink only 'fails' if the
* filename is invalid. It may not remove the file
* if it's locked, so check if it's still around. */
if ((access(s,F_OK) != -1))
{
tot--;
}
}
#endif
}
else { /* don't let root wipe out directories without -U */
Stat_t statbuf;
if (PerlLIO_lstat(s, &statbuf) < 0)
tot--;
else if (S_ISDIR(statbuf.st_mode)) {
SETERRNO(EISDIR, SS_NOPRIV);
tot--;
}
else {
if (UNLINK(s))
{
tot--;
}
#if defined(__amigaos4__) && defined(NEWLIB)
else
{
/* Under AmigaOS4 unlink only 'fails' if the filename is invalid */
/* It may not remove the file if it's Locked, so check if it's still */
/* arround */
if((access(s,F_OK) != -1))
{
tot--;
}
}
#endif
}
}
}
break;
#if defined(HAS_UTIME) || defined(HAS_FUTIMES)
case OP_UTIME:
APPLY_TAINT_PROPER();
if (sp - mark > 2) {
#if defined(HAS_FUTIMES)
struct timeval utbuf[2];
void *utbufp = utbuf;
#elif defined(I_UTIME) || defined(VMS)
struct utimbuf utbuf;
struct utimbuf *utbufp = &utbuf;
#else
struct {
Time_t actime;
Time_t modtime;
} utbuf;
void *utbufp = &utbuf;
#endif
SV* const accessed = *++mark;
SV* const modified = *++mark;
/* Be like C, and if both times are undefined, let the C
* library figure out what to do. This usually means
* "current time". */
if ( accessed == &PL_sv_undef && modified == &PL_sv_undef )
utbufp = NULL;
else {
Zero(&utbuf, sizeof utbuf, char);
#ifdef HAS_FUTIMES
utbuf[0].tv_sec = (long)SvIV(accessed); /* time accessed */
utbuf[0].tv_usec = 0;
utbuf[1].tv_sec = (long)SvIV(modified); /* time modified */
utbuf[1].tv_usec = 0;
#elif defined(BIG_TIME)
utbuf.actime = (Time_t)SvNV(accessed); /* time accessed */
utbuf.modtime = (Time_t)SvNV(modified); /* time modified */
#else
utbuf.actime = (Time_t)SvIV(accessed); /* time accessed */
utbuf.modtime = (Time_t)SvIV(modified); /* time modified */
#endif
}
APPLY_TAINT_PROPER();
tot = sp - mark;
while (++mark <= sp) {
GV* gv;
if ((gv = MAYBE_DEREF_GV(*mark))) {
if (GvIO(gv) && IoIFP(GvIOp(gv))) {
#ifdef HAS_FUTIMES
int fd = PerlIO_fileno(IoIFP(GvIOn(gv)));
APPLY_TAINT_PROPER();
if (fd < 0) {
SETERRNO(EBADF,RMS_IFI);
tot--;
} else if (futimes(fd, (struct timeval *) utbufp))
tot--;
#else
Perl_die(aTHX_ PL_no_func, "futimes");
#endif
}
else {
tot--;
}
}
else {
const char * const name = SvPV_nomg_const(*mark, len);
APPLY_TAINT_PROPER();
if (!IS_SAFE_PATHNAME(name, len, "utime")) {
tot--;
}
else
#ifdef HAS_FUTIMES
if (utimes(name, (struct timeval *)utbufp))
#else
if (PerlLIO_utime(name, utbufp))
#endif
tot--;
}
}
}
else
tot = 0;
break;
#endif
}
return tot;
#undef APPLY_TAINT_PROPER
}
/* Do the permissions in *statbufp allow some operation? */
#ifndef VMS /* VMS' cando is in vms.c */
bool
Perl_cando(pTHX_ Mode_t mode, bool effective, const Stat_t *statbufp)
/* effective is a flag, true for EUID, or for checking if the effective gid
* is in the list of groups returned from getgroups().
*/
{
PERL_ARGS_ASSERT_CANDO;
PERL_UNUSED_CONTEXT;
#ifdef DOSISH
/* [Comments and code from Len Reed]
* MS-DOS "user" is similar to UNIX's "superuser," but can't write
* to write-protected files. The execute permission bit is set
* by the Microsoft C library stat() function for the following:
* .exe files
* .com files
* .bat files
* directories
* All files and directories are readable.
* Directories and special files, e.g. "CON", cannot be
* write-protected.
* [Comment by Tom Dinger -- a directory can have the write-protect
* bit set in the file system, but DOS permits changes to
* the directory anyway. In addition, all bets are off
* here for networked software, such as Novell and
* Sun's PC-NFS.]
*/
/* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
* too so it will actually look into the files for magic numbers
*/
return cBOOL(mode & statbufp->st_mode);
#else /* ! DOSISH */
# ifdef __CYGWIN__
if (ingroup(544,effective)) { /* member of Administrators */
# else
if ((effective ? PerlProc_geteuid() : PerlProc_getuid()) == 0) { /* root is special */
# endif
if (mode == S_IXUSR) {
if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
return TRUE;
}
else
return TRUE; /* root reads and writes anything */
return FALSE;
}
if (statbufp->st_uid == (effective ? PerlProc_geteuid() : PerlProc_getuid()) ) {
if (statbufp->st_mode & mode)
return TRUE; /* ok as "user" */
}
else if (ingroup(statbufp->st_gid,effective)) {
if (statbufp->st_mode & mode >> 3)
return TRUE; /* ok as "group" */
}
else if (statbufp->st_mode & mode >> 6)
return TRUE; /* ok as "other" */
return FALSE;
#endif /* ! DOSISH */
}
#endif /* ! VMS */
static bool
S_ingroup(pTHX_ Gid_t testgid, bool effective)
{
#ifndef PERL_IMPLICIT_SYS
/* PERL_IMPLICIT_SYS like Win32: getegid() etc. require the context. */
PERL_UNUSED_CONTEXT;
#endif
if (testgid == (effective ? PerlProc_getegid() : PerlProc_getgid()))
return TRUE;
#ifdef HAS_GETGROUPS
{
Groups_t *gary = NULL;
I32 anum;
bool rc = FALSE;
anum = getgroups(0, gary);
if (anum > 0) {
Newx(gary, anum, Groups_t);
anum = getgroups(anum, gary);
while (--anum >= 0)
if (gary[anum] == testgid) {
rc = TRUE;
break;
}
Safefree(gary);
}
return rc;
}
#else
return FALSE;
#endif
}
#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
I32
Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp)
{
const key_t key = (key_t)SvNVx(*++mark);
SV *nsv = optype == OP_MSGGET ? NULL : *++mark;
const I32 flags = SvIVx(*++mark);
PERL_ARGS_ASSERT_DO_IPCGET;
PERL_UNUSED_ARG(sp);
SETERRNO(0,0);
switch (optype)
{
#ifdef HAS_MSG
case OP_MSGGET:
return msgget(key, flags);
#endif
#ifdef HAS_SEM
case OP_SEMGET:
return semget(key, (int) SvIV(nsv), flags);
#endif
#ifdef HAS_SHM
case OP_SHMGET:
return shmget(key, (size_t) SvUV(nsv), flags);
#endif
#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
default:
/* diag_listed_as: msg%s not implemented */
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
}
return -1; /* should never happen */
}
I32
Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp)
{
char *a;
I32 ret = -1;
const I32 id = SvIVx(*++mark);
#ifdef Semctl
const I32 n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
#endif
const I32 cmd = SvIVx(*++mark);
SV * const astr = *++mark;
STRLEN infosize = 0;
I32 getinfo = (cmd == IPC_STAT);
PERL_ARGS_ASSERT_DO_IPCCTL;
PERL_UNUSED_ARG(sp);
switch (optype)
{
#ifdef HAS_MSG
case OP_MSGCTL:
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct msqid_ds);
break;
#endif
#ifdef HAS_SHM
case OP_SHMCTL:
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct shmid_ds);
break;
#endif
#ifdef HAS_SEM
case OP_SEMCTL:
#ifdef Semctl
if (cmd == IPC_STAT || cmd == IPC_SET)
infosize = sizeof(struct semid_ds);
else if (cmd == GETALL || cmd == SETALL)
{
struct semid_ds semds;
union semun semun;
#ifdef EXTRA_F_IN_SEMUN_BUF
semun.buff = &semds;
#else
semun.buf = &semds;
#endif
getinfo = (cmd == GETALL);
if (Semctl(id, 0, IPC_STAT, semun) == -1)
return -1;
infosize = semds.sem_nsems * sizeof(short);
/* "short" is technically wrong but much more portable
than guessing about u_?short(_t)? */
}
#else
/* diag_listed_as: sem%s not implemented */
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
break;
#endif
#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
default:
/* diag_listed_as: shm%s not implemented */
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
}
if (infosize)
{
if (getinfo)
{
SvPV_force_nolen(astr);
a = SvGROW(astr, infosize+1);
}
else
{
STRLEN len;
a = SvPV(astr, len);
if (len != infosize)
Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld",
PL_op_desc[optype],
(unsigned long)len,
(long)infosize);
}
}
else
{
const IV i = SvIV(astr);
a = INT2PTR(char *,i); /* ouch */
}
SETERRNO(0,0);
switch (optype)
{
#ifdef HAS_MSG
case OP_MSGCTL:
ret = msgctl(id, cmd, (struct msqid_ds *)a);
break;
#endif
#ifdef HAS_SEM
case OP_SEMCTL: {
#ifdef Semctl
union semun unsemds;
if(cmd == SETVAL) {
unsemds.val = PTR2nat(a);
}
else {
#ifdef EXTRA_F_IN_SEMUN_BUF
unsemds.buff = (struct semid_ds *)a;
#else
unsemds.buf = (struct semid_ds *)a;
#endif
}
ret = Semctl(id, n, cmd, unsemds);
#else
/* diag_listed_as: sem%s not implemented */
Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]);
#endif
}
break;
#endif
#ifdef HAS_SHM
case OP_SHMCTL:
ret = shmctl(id, cmd, (struct shmid_ds *)a);
break;
#endif
}
if (getinfo && ret >= 0) {
SvCUR_set(astr, infosize);
*SvEND(astr) = '\0';
SvSETMAGIC(astr);
}
return ret;
}
I32
Perl_do_msgsnd(pTHX_ SV **mark, SV **sp)
{
#ifdef HAS_MSG
STRLEN len;
const I32 id = SvIVx(*++mark);
SV * const mstr = *++mark;
const I32 flags = SvIVx(*++mark);
const char * const mbuf = SvPV_const(mstr, len);
const I32 msize = len - sizeof(long);
PERL_ARGS_ASSERT_DO_MSGSND;
PERL_UNUSED_ARG(sp);
if (msize < 0)
Perl_croak(aTHX_ "Arg too short for msgsnd");
SETERRNO(0,0);
if (id >= 0 && flags >= 0) {
return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
} else {
SETERRNO(EINVAL,LIB_INVARG);
return -1;
}
#else
PERL_UNUSED_ARG(sp);
PERL_UNUSED_ARG(mark);
/* diag_listed_as: msg%s not implemented */
Perl_croak(aTHX_ "msgsnd not implemented");
return -1;
#endif
}
I32
Perl_do_msgrcv(pTHX_ SV **mark, SV **sp)
{
#ifdef HAS_MSG
char *mbuf;
long mtype;
I32 msize, flags, ret;
const I32 id = SvIVx(*++mark);
SV * const mstr = *++mark;
PERL_ARGS_ASSERT_DO_MSGRCV;
PERL_UNUSED_ARG(sp);
/* suppress warning when reading into undef var --jhi */
if (! SvOK(mstr))
SvPVCLEAR(mstr);
msize = SvIVx(*++mark);
mtype = (long)SvIVx(*++mark);
flags = SvIVx(*++mark);
SvPV_force_nolen(mstr);
mbuf = SvGROW(mstr, sizeof(long)+msize+1);
SETERRNO(0,0);
if (id >= 0 && msize >= 0 && flags >= 0) {
ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
} else {
SETERRNO(EINVAL,LIB_INVARG);
ret = -1;
}
if (ret >= 0) {
SvCUR_set(mstr, sizeof(long)+ret);
*SvEND(mstr) = '\0';
/* who knows who has been playing with this message? */
SvTAINTED_on(mstr);
}
return ret;
#else
PERL_UNUSED_ARG(sp);
PERL_UNUSED_ARG(mark);
/* diag_listed_as: msg%s not implemented */
Perl_croak(aTHX_ "msgrcv not implemented");
return -1;
#endif
}
I32
Perl_do_semop(pTHX_ SV **mark, SV **sp)
{
#ifdef HAS_SEM
STRLEN opsize;
const I32 id = SvIVx(*++mark);
SV * const opstr = *++mark;
const char * const opbuf = SvPV_const(opstr, opsize);
PERL_ARGS_ASSERT_DO_SEMOP;
PERL_UNUSED_ARG(sp);
if (opsize < 3 * SHORTSIZE
|| (opsize % (3 * SHORTSIZE))) {
SETERRNO(EINVAL,LIB_INVARG);
return -1;
}
SETERRNO(0,0);
/* We can't assume that sizeof(struct sembuf) == 3 * sizeof(short). */
{
const int nsops = opsize / (3 * sizeof (short));
int i = nsops;
short * const ops = (short *) opbuf;
short *o = ops;
struct sembuf *temps, *t;
I32 result;
Newx (temps, nsops, struct sembuf);
t = temps;
while (i--) {
t->sem_num = *o++;
t->sem_op = *o++;
t->sem_flg = *o++;
t++;
}
result = semop(id, temps, nsops);
Safefree(temps);
return result;
}
#else
/* diag_listed_as: sem%s not implemented */
Perl_croak(aTHX_ "semop not implemented");
#endif
}
I32
Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp)
{
#ifdef HAS_SHM
char *shm;
struct shmid_ds shmds;
const I32 id = SvIVx(*++mark);
SV * const mstr = *++mark;
const I32 mpos = SvIVx(*++mark);
const I32 msize = SvIVx(*++mark);
PERL_ARGS_ASSERT_DO_SHMIO;
PERL_UNUSED_ARG(sp);
SETERRNO(0,0);
if (shmctl(id, IPC_STAT, &shmds) == -1)
return -1;
if (mpos < 0 || msize < 0
|| (size_t)mpos + msize > (size_t)shmds.shm_segsz) {
SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */
return -1;
}
if (id >= 0) {
shm = (char *)shmat(id, NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
} else {
SETERRNO(EINVAL,LIB_INVARG);
return -1;
}
if (shm == (char *)-1) /* I hate System V IPC, I really do */
return -1;
if (optype == OP_SHMREAD) {
char *mbuf;
/* suppress warning when reading into undef var (tchrist 3/Mar/00) */
SvGETMAGIC(mstr);
SvUPGRADE(mstr, SVt_PV);
if (! SvOK(mstr))
SvPVCLEAR(mstr);
SvPOK_only(mstr);
mbuf = SvGROW(mstr, (STRLEN)msize+1);
Copy(shm + mpos, mbuf, msize, char);
SvCUR_set(mstr, msize);
*SvEND(mstr) = '\0';
SvSETMAGIC(mstr);
/* who knows who has been playing with this shared memory? */
SvTAINTED_on(mstr);
}
else {
STRLEN len;
const char *mbuf = SvPV_const(mstr, len);
const I32 n = ((I32)len > msize) ? msize : (I32)len;
Copy(mbuf, shm + mpos, n, char);
if (n < msize)
memzero(shm + mpos + n, msize - n);
}
return shmdt(shm);
#else
/* diag_listed_as: shm%s not implemented */
Perl_croak(aTHX_ "shm I/O not implemented");
return -1;
#endif
}
#endif /* SYSV IPC */
/*
=head1 IO Functions
=for apidoc start_glob
Function called by C<do_readline> to spawn a glob (or do the glob inside
perl on VMS). This code used to be inline, but now perl uses C<File::Glob>
this glob starter is only used by miniperl during the build process,
or when PERL_EXTERNAL_GLOB is defined.
Moving it away shrinks F<pp_hot.c>; shrinking F<pp_hot.c> helps speed perl up.
=cut
*/
PerlIO *
Perl_start_glob (pTHX_ SV *tmpglob, IO *io)
{
SV * const tmpcmd = newSV(0);
PerlIO *fp;
STRLEN len;
const char *s = SvPV(tmpglob, len);
PERL_ARGS_ASSERT_START_GLOB;
if (!IS_SAFE_SYSCALL(s, len, "pattern", "glob"))
return NULL;
ENTER;
SAVEFREESV(tmpcmd);
#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
/* since spawning off a process is a real performance hit */
PerlIO *
Perl_vms_start_glob
(pTHX_ SV *tmpglob,
IO *io);
fp = Perl_vms_start_glob(aTHX_ tmpglob, io);
#else /* !VMS */
# ifdef DOSISH
# if defined(OS2)
sv_setpv(tmpcmd, "for a in ");
sv_catsv(tmpcmd, tmpglob);
sv_catpvs(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
# elif defined(DJGPP)
sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
sv_catsv(tmpcmd, tmpglob);
# else
sv_setpv(tmpcmd, "perlglob ");
sv_catsv(tmpcmd, tmpglob);
sv_catpvs(tmpcmd, " |");
# endif
# elif defined(CSH)
sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
sv_catpvs(tmpcmd, " -cf 'set nonomatch; glob ");
sv_catsv(tmpcmd, tmpglob);
sv_catpvs(tmpcmd, "' 2>/dev/null |");
# else
sv_setpv(tmpcmd, "echo ");
sv_catsv(tmpcmd, tmpglob);
sv_catpvs(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
# endif /* !DOSISH && !CSH */
{
SV ** const svp = hv_fetchs(GvHVn(PL_envgv), "LS_COLORS", 0);
if (svp && *svp)
save_helem_flags(GvHV(PL_envgv),
newSVpvs_flags("LS_COLORS", SVs_TEMP), svp,
SAVEf_SETMAGIC);
}
(void)do_open6(PL_last_in_gv, SvPVX_const(tmpcmd), SvCUR(tmpcmd),
NULL, NULL, 0);
fp = IoIFP(io);
#endif /* !VMS */
LEAVE;
if (!fp && ckWARN(WARN_GLOB)) {
Perl_warner(aTHX_ packWARN(WARN_GLOB), "glob failed (can't start child: %s)",
Strerror(errno));
}
return fp;
}
/*
* ex: set ts=8 sts=4 sw=4 et:
*/
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