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perl/cygwin/cygwin.c

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/*
* Cygwin extras
*/
#define PERLIO_NOT_STDIO 0
#include "EXTERN.h"
#include "perl.h"
#undef USE_DYNAMIC_LOADING
#include "XSUB.h"
#include <unistd.h>
#include <process.h>
#include <sys/cygwin.h>
#include <cygwin/version.h>
#include <mntent.h>
#include <alloca.h>
#include <dlfcn.h>
#if (CYGWIN_VERSION_API_MINOR >= 181)
#include <wchar.h>
#endif
/*
* pp_system() implemented via spawn()
* - more efficient and useful when embedding Perl in non-Cygwin apps
* - code mostly borrowed from djgpp.c
*/
static int
do_spawnvp (const char *path, const char * const *argv)
{
dTHX;
Sigsave_t ihand,qhand;
int childpid, result, status;
rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &ihand);
rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qhand);
childpid = spawnvp(_P_NOWAIT,path,argv);
if (childpid < 0) {
status = -1;
if(ckWARN(WARN_EXEC))
Perl_warner(aTHX_ packWARN(WARN_EXEC),"Can't spawn \"%s\": %s",
path,Strerror (errno));
} else {
do {
result = wait4pid(childpid, &status, 0);
} while (result == -1 && errno == EINTR);
if(result < 0)
status = -1;
}
(void)rsignal_restore(SIGINT, &ihand);
(void)rsignal_restore(SIGQUIT, &qhand);
return status;
}
int
do_aspawn (SV *really, void **mark, void **sp)
{
dTHX;
int rc;
char const **a;
char *tmps,**argv;
STRLEN n_a;
if (sp<=mark)
return -1;
argv=(char**) alloca ((sp-mark+3)*sizeof (char*));
a=(char const **)argv;
while (++mark <= sp)
if (*mark)
*a++ = SvPVx((SV *)*mark, n_a);
else
*a++ = "";
*a = (char*)NULL;
if (argv[0][0] != '/' && argv[0][0] != '\\'
&& !(argv[0][0] && argv[0][1] == ':'
&& (argv[0][2] == '/' || argv[0][2] != '\\'))
) /* will swawnvp use PATH? */
TAINT_ENV(); /* testing IFS here is overkill, probably */
if (really && *(tmps = SvPV(really, n_a)))
rc=do_spawnvp (tmps,(const char * const *)argv);
else
rc=do_spawnvp (argv[0],(const char *const *)argv);
return rc;
}
int
do_spawn (char *cmd)
{
dTHX;
char const **argv, **a;
char *s;
char const *metachars = "$&*(){}[]'\";\\?>|<~`\n";
const char *command[4];
int result;
ENTER;
while (*cmd && isSPACE(*cmd))
cmd++;
if (strBEGINs (cmd,"/bin/sh") && isSPACE (cmd[7]))
cmd+=5;
/* save an extra exec if possible */
/* see if there are shell metacharacters in it */
if (strstr (cmd,"..."))
goto doshell;
if (*cmd=='.' && isSPACE (cmd[1]))
goto doshell;
if (strBEGINs (cmd,"exec") && isSPACE (cmd[4]))
goto doshell;
for (s=cmd; *s && isALPHA (*s); s++) ; /* catch VAR=val gizmo */
if (*s=='=')
goto doshell;
for (s=cmd; *s; s++)
if (strchr (metachars,*s))
{
if (*s=='\n' && s[1]=='\0')
{
*s='\0';
break;
}
doshell:
command[0] = "sh";
command[1] = "-c";
command[2] = cmd;
command[3] = NULL;
result = do_spawnvp("sh",command);
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 (*s && isSPACE (*s)) s++;
if (*s)
*(a++)=s;
while (*s && !isSPACE (*s)) s++;
if (*s)
*s++='\0';
}
*a = (char*)NULL;
if (!argv[0])
result = -1;
else
result = do_spawnvp(argv[0],(const char * const *)argv);
leave:
LEAVE;
return result;
}
#if (CYGWIN_VERSION_API_MINOR >= 181)
char*
wide_to_utf8(const wchar_t *wbuf)
{
char *buf;
int wlen = 0;
char *oldlocale;
dVAR;
/* Here and elsewhere in this file, we have a critical section to prevent
* another thread from changing the locale out from under us. XXX But why
* not just use uvchr_to_utf8? */
LOCALE_LOCK;
oldlocale = setlocale(LC_CTYPE, NULL);
setlocale(LC_CTYPE, "utf-8");
/* uvchr_to_utf8(buf, chr) or Encoding::_bytes_to_utf8(sv, "UCS-2BE"); */
wlen = wcsrtombs(NULL, (const wchar_t **)&wbuf, wlen, NULL);
buf = (char *) safemalloc(wlen+1);
wcsrtombs(buf, (const wchar_t **)&wbuf, wlen, NULL);
if (oldlocale) setlocale(LC_CTYPE, oldlocale);
else setlocale(LC_CTYPE, "C");
LOCALE_UNLOCK;
return buf;
}
wchar_t*
utf8_to_wide(const char *buf)
{
wchar_t *wbuf;
mbstate_t mbs;
char *oldlocale;
int wlen = sizeof(wchar_t)*strlen(buf);
dVAR;
LOCALE_LOCK;
oldlocale = setlocale(LC_CTYPE, NULL);
setlocale(LC_CTYPE, "utf-8");
wbuf = (wchar_t *) safemalloc(wlen);
/* utf8_to_uvchr_buf(pathname, pathname + wlen, wpath) or Encoding::_utf8_to_bytes(sv, "UCS-2BE"); */
wlen = mbsrtowcs(wbuf, (const char**)&buf, wlen, &mbs);
if (oldlocale) setlocale(LC_CTYPE, oldlocale);
else setlocale(LC_CTYPE, "C");
LOCALE_UNLOCK;
return wbuf;
}
#endif /* cygwin 1.7 */
/* see also Cwd.pm */
XS(Cygwin_cwd)
{
dXSARGS;
char *cwd;
/* See http://rt.perl.org/rt3/Ticket/Display.html?id=38628
There is Cwd->cwd() usage in the wild, and previous versions didn't die.
*/
if(items > 1)
Perl_croak(aTHX_ "Usage: Cwd::cwd()");
if((cwd = getcwd(NULL, -1))) {
ST(0) = sv_2mortal(newSVpv(cwd, 0));
free(cwd);
SvTAINTED_on(ST(0));
XSRETURN(1);
}
XSRETURN_UNDEF;
}
XS(XS_Cygwin_pid_to_winpid)
{
dXSARGS;
dXSTARG;
pid_t pid, RETVAL;
if (items != 1)
Perl_croak(aTHX_ "Usage: Cygwin::pid_to_winpid(pid)");
pid = (pid_t)SvIV(ST(0));
if ((RETVAL = cygwin_internal(CW_CYGWIN_PID_TO_WINPID, pid)) > 0) {
XSprePUSH; PUSHi((IV)RETVAL);
XSRETURN(1);
}
XSRETURN_UNDEF;
}
XS(XS_Cygwin_winpid_to_pid)
{
dXSARGS;
dXSTARG;
pid_t pid, RETVAL;
if (items != 1)
Perl_croak(aTHX_ "Usage: Cygwin::winpid_to_pid(pid)");
pid = (pid_t)SvIV(ST(0));
#if (CYGWIN_VERSION_API_MINOR >= 181)
RETVAL = cygwin_winpid_to_pid(pid);
#else
RETVAL = cygwin32_winpid_to_pid(pid);
#endif
if (RETVAL > 0) {
XSprePUSH; PUSHi((IV)RETVAL);
XSRETURN(1);
}
XSRETURN_UNDEF;
}
XS(XS_Cygwin_win_to_posix_path)
{
dXSARGS;
int absolute_flag = 0;
STRLEN len;
int err = 0;
char *src_path;
char *posix_path;
int isutf8 = 0;
if (items < 1 || items > 2)
Perl_croak(aTHX_ "Usage: Cygwin::win_to_posix_path(pathname, [absolute])");
src_path = SvPV(ST(0), len);
if (items == 2)
absolute_flag = SvTRUE(ST(1));
if (!len)
Perl_croak(aTHX_ "can't convert empty path");
isutf8 = SvUTF8(ST(0));
#if (CYGWIN_VERSION_API_MINOR >= 181)
/* Check utf8 flag and use wide api then.
Size calculation: On overflow let cygwin_conv_path calculate the final size.
*/
if (isutf8) {
int what = absolute_flag ? CCP_WIN_W_TO_POSIX : CCP_WIN_W_TO_POSIX | CCP_RELATIVE;
int wlen = sizeof(wchar_t)*(len + 260 + 1001);
wchar_t *wpath = (wchar_t *) safemalloc(sizeof(wchar_t)*len);
wchar_t *wbuf = (wchar_t *) safemalloc(wlen);
if (!IN_BYTES) {
mbstate_t mbs;
char *oldlocale;
dVAR;
LOCALE_LOCK;
oldlocale = setlocale(LC_CTYPE, NULL);
setlocale(LC_CTYPE, "utf-8");
/* utf8_to_uvchr_buf(src_path, src_path + wlen, wpath) or Encoding::_utf8_to_bytes(sv, "UCS-2BE"); */
wlen = mbsrtowcs(wpath, (const char**)&src_path, wlen, &mbs);
if (wlen > 0)
err = cygwin_conv_path(what, wpath, wbuf, wlen);
if (oldlocale) setlocale(LC_CTYPE, oldlocale);
else setlocale(LC_CTYPE, "C");
LOCALE_UNLOCK;
} else { /* use bytes; assume already ucs-2 encoded bytestream */
err = cygwin_conv_path(what, src_path, wbuf, wlen);
}
if (err == ENOSPC) { /* our space assumption was wrong, not enough space */
int newlen = cygwin_conv_path(what, wpath, wbuf, 0);
wbuf = (wchar_t *) realloc(&wbuf, newlen);
err = cygwin_conv_path(what, wpath, wbuf, newlen);
wlen = newlen;
}
/* utf16_to_utf8(*p, *d, bytlen, *newlen) */
posix_path = (char *) safemalloc(wlen*3);
Perl_utf16_to_utf8(aTHX_ (U8*)&wpath, (U8*)posix_path, (I32)wlen*2, (I32*)&len);
/*
wlen = wcsrtombs(NULL, (const wchar_t **)&wbuf, wlen, NULL);
posix_path = (char *) safemalloc(wlen+1);
wcsrtombs(posix_path, (const wchar_t **)&wbuf, wlen, NULL);
*/
} else {
int what = absolute_flag ? CCP_WIN_A_TO_POSIX : CCP_WIN_A_TO_POSIX | CCP_RELATIVE;
posix_path = (char *) safemalloc (len + 260 + 1001);
err = cygwin_conv_path(what, src_path, posix_path, len + 260 + 1001);
if (err == ENOSPC) { /* our space assumption was wrong, not enough space */
int newlen = cygwin_conv_path(what, src_path, posix_path, 0);
posix_path = (char *) realloc(&posix_path, newlen);
err = cygwin_conv_path(what, src_path, posix_path, newlen);
}
}
#else
posix_path = (char *) safemalloc (len + 260 + 1001);
if (absolute_flag)
err = cygwin_conv_to_full_posix_path(src_path, posix_path);
else
err = cygwin_conv_to_posix_path(src_path, posix_path);
#endif
if (!err) {
EXTEND(SP, 1);
ST(0) = sv_2mortal(newSVpv(posix_path, 0));
if (isutf8) { /* src was utf-8, so result should also */
/* TODO: convert ANSI (local windows encoding) to utf-8 on cygwin-1.5 */
SvUTF8_on(ST(0));
}
safefree(posix_path);
XSRETURN(1);
} else {
safefree(posix_path);
XSRETURN_UNDEF;
}
}
XS(XS_Cygwin_posix_to_win_path)
{
dXSARGS;
int absolute_flag = 0;
STRLEN len;
int err = 0;
char *src_path, *win_path;
int isutf8 = 0;
if (items < 1 || items > 2)
Perl_croak(aTHX_ "Usage: Cygwin::posix_to_win_path(pathname, [absolute])");
src_path = SvPVx(ST(0), len);
if (items == 2)
absolute_flag = SvTRUE(ST(1));
if (!len)
Perl_croak(aTHX_ "can't convert empty path");
isutf8 = SvUTF8(ST(0));
#if (CYGWIN_VERSION_API_MINOR >= 181)
/* Check utf8 flag and use wide api then.
Size calculation: On overflow let cygwin_conv_path calculate the final size.
*/
if (isutf8) {
int what = absolute_flag ? CCP_POSIX_TO_WIN_W : CCP_POSIX_TO_WIN_W | CCP_RELATIVE;
int wlen = sizeof(wchar_t)*(len + 260 + 1001);
wchar_t *wpath = (wchar_t *) safemalloc(sizeof(wchar_t)*len);
wchar_t *wbuf = (wchar_t *) safemalloc(wlen);
char *oldlocale;
dVAR;
LOCALE_LOCK;
oldlocale = setlocale(LC_CTYPE, NULL);
setlocale(LC_CTYPE, "utf-8");
if (!IN_BYTES) {
mbstate_t mbs;
/* utf8_to_uvchr_buf(src_path, src_path + wlen, wpath) or Encoding::_utf8_to_bytes(sv, "UCS-2BE"); */
wlen = mbsrtowcs(wpath, (const char**)&src_path, wlen, &mbs);
if (wlen > 0)
err = cygwin_conv_path(what, wpath, wbuf, wlen);
} else { /* use bytes; assume already ucs-2 encoded bytestream */
err = cygwin_conv_path(what, src_path, wbuf, wlen);
}
if (err == ENOSPC) { /* our space assumption was wrong, not enough space */
int newlen = cygwin_conv_path(what, wpath, wbuf, 0);
wbuf = (wchar_t *) realloc(&wbuf, newlen);
err = cygwin_conv_path(what, wpath, wbuf, newlen);
wlen = newlen;
}
/* also see utf8.c: Perl_utf16_to_utf8() or Encoding::_bytes_to_utf8(sv, "UCS-2BE"); */
wlen = wcsrtombs(NULL, (const wchar_t **)&wbuf, wlen, NULL);
win_path = (char *) safemalloc(wlen+1);
wcsrtombs(win_path, (const wchar_t **)&wbuf, wlen, NULL);
if (oldlocale) setlocale(LC_CTYPE, oldlocale);
else setlocale(LC_CTYPE, "C");
LOCALE_UNLOCK;
} else {
int what = absolute_flag ? CCP_POSIX_TO_WIN_A : CCP_POSIX_TO_WIN_A | CCP_RELATIVE;
win_path = (char *) safemalloc(len + 260 + 1001);
err = cygwin_conv_path(what, src_path, win_path, len + 260 + 1001);
if (err == ENOSPC) { /* our space assumption was wrong, not enough space */
int newlen = cygwin_conv_path(what, src_path, win_path, 0);
win_path = (char *) realloc(&win_path, newlen);
err = cygwin_conv_path(what, src_path, win_path, newlen);
}
}
#else
if (isutf8)
Perl_warn(aTHX_ "can't convert utf8 path");
win_path = (char *) safemalloc(len + 260 + 1001);
if (absolute_flag)
err = cygwin_conv_to_full_win32_path(src_path, win_path);
else
err = cygwin_conv_to_win32_path(src_path, win_path);
#endif
if (!err) {
EXTEND(SP, 1);
ST(0) = sv_2mortal(newSVpv(win_path, 0));
if (isutf8) {
SvUTF8_on(ST(0));
}
safefree(win_path);
XSRETURN(1);
} else {
safefree(win_path);
XSRETURN_UNDEF;
}
}
XS(XS_Cygwin_mount_table)
{
dXSARGS;
struct mntent *mnt;
if (items != 0)
Perl_croak(aTHX_ "Usage: Cygwin::mount_table");
/* => array of [mnt_dir mnt_fsname mnt_type mnt_opts] */
setmntent (0, 0);
while ((mnt = getmntent (0))) {
AV* av = newAV();
av_push(av, newSVpvn(mnt->mnt_dir, strlen(mnt->mnt_dir)));
av_push(av, newSVpvn(mnt->mnt_fsname, strlen(mnt->mnt_fsname)));
av_push(av, newSVpvn(mnt->mnt_type, strlen(mnt->mnt_type)));
av_push(av, newSVpvn(mnt->mnt_opts, strlen(mnt->mnt_opts)));
XPUSHs(sv_2mortal(newRV_noinc((SV*)av)));
}
endmntent (0);
PUTBACK;
}
XS(XS_Cygwin_mount_flags)
{
dXSARGS;
char *pathname;
char flags[PATH_MAX];
flags[0] = '\0';
if (items != 1)
Perl_croak(aTHX_ "Usage: Cygwin::mount_flags( mnt_dir | '/cygdrive' )");
pathname = SvPV_nolen(ST(0));
if (strEQ(pathname, "/cygdrive")) {
char user[PATH_MAX];
char system[PATH_MAX];
char user_flags[PATH_MAX];
char system_flags[PATH_MAX];
cygwin_internal (CW_GET_CYGDRIVE_INFO, user, system,
user_flags, system_flags);
if (strlen(user) > 0) {
sprintf(flags, "%s,cygdrive,%s", user_flags, user);
} else {
sprintf(flags, "%s,cygdrive,%s", system_flags, system);
}
ST(0) = sv_2mortal(newSVpv(flags, 0));
XSRETURN(1);
} else {
struct mntent *mnt;
int found = 0;
setmntent (0, 0);
while ((mnt = getmntent (0))) {
if (strEQ(pathname, mnt->mnt_dir)) {
strcpy(flags, mnt->mnt_type);
if (strlen(mnt->mnt_opts) > 0) {
strcat(flags, ",");
strcat(flags, mnt->mnt_opts);
}
found++;
break;
}
}
endmntent (0);
/* Check if arg is the current volume moint point if not default,
* and then use CW_GET_CYGDRIVE_INFO also.
*/
if (!found) {
char user[PATH_MAX];
char system[PATH_MAX];
char user_flags[PATH_MAX];
char system_flags[PATH_MAX];
cygwin_internal (CW_GET_CYGDRIVE_INFO, user, system,
user_flags, system_flags);
if (strlen(user) > 0) {
if (strNE(user,pathname)) {
sprintf(flags, "%s,cygdrive,%s", user_flags, user);
found++;
}
} else {
if (strNE(user,pathname)) {
sprintf(flags, "%s,cygdrive,%s", system_flags, system);
found++;
}
}
}
if (found) {
ST(0) = sv_2mortal(newSVpv(flags, 0));
XSRETURN(1);
} else {
XSRETURN_UNDEF;
}
}
}
XS(XS_Cygwin_is_binmount)
{
dXSARGS;
char *pathname;
if (items != 1)
Perl_croak(aTHX_ "Usage: Cygwin::is_binmount(pathname)");
pathname = SvPV_nolen(ST(0));
ST(0) = boolSV(cygwin_internal(CW_GET_BINMODE, pathname));
XSRETURN(1);
}
XS(XS_Cygwin_sync_winenv){ cygwin_internal(CW_SYNC_WINENV); }
void
init_os_extras(void)
{
dTHX;
char const *file = __FILE__;
void *handle;
newXS("Cwd::cwd", Cygwin_cwd, file);
newXSproto("Cygwin::winpid_to_pid", XS_Cygwin_winpid_to_pid, file, "$");
newXSproto("Cygwin::pid_to_winpid", XS_Cygwin_pid_to_winpid, file, "$");
newXSproto("Cygwin::win_to_posix_path", XS_Cygwin_win_to_posix_path, file, "$;$");
newXSproto("Cygwin::posix_to_win_path", XS_Cygwin_posix_to_win_path, file, "$;$");
newXSproto("Cygwin::mount_table", XS_Cygwin_mount_table, file, "");
newXSproto("Cygwin::mount_flags", XS_Cygwin_mount_flags, file, "$");
newXSproto("Cygwin::is_binmount", XS_Cygwin_is_binmount, file, "$");
newXS("Cygwin::sync_winenv", XS_Cygwin_sync_winenv, file);
/* Initialize Win32CORE if it has been statically linked. */
handle = dlopen(NULL, RTLD_LAZY);
if (handle) {
void (*pfn_init)(pTHX);
pfn_init = (void (*)(pTHX))dlsym(handle, "init_Win32CORE");
if (pfn_init)
pfn_init(aTHX);
dlclose(handle);
}
}
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