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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimp-spawn.c
* Copyright (C) 2018 Ell
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <glib-object.h>
#ifdef HAVE_VFORK
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef G_OS_WIN32
#include <windows.h>
#include <io.h>
#endif
#include "core-types.h"
#include "gimp-spawn.h"
#include "gimp-intl.h"
#ifdef HAVE_VFORK
/* copied from glib */
static gint
exec_err_to_g_error (gint en)
{
switch (en)
{
#ifdef EACCES
case EACCES:
return G_SPAWN_ERROR_ACCES;
break;
#endif
#ifdef EPERM
case EPERM:
return G_SPAWN_ERROR_PERM;
break;
#endif
#ifdef E2BIG
case E2BIG:
return G_SPAWN_ERROR_TOO_BIG;
break;
#endif
#ifdef ENOEXEC
case ENOEXEC:
return G_SPAWN_ERROR_NOEXEC;
break;
#endif
#ifdef ENAMETOOLONG
case ENAMETOOLONG:
return G_SPAWN_ERROR_NAMETOOLONG;
break;
#endif
#ifdef ENOENT
case ENOENT:
return G_SPAWN_ERROR_NOENT;
break;
#endif
#ifdef ENOMEM
case ENOMEM:
return G_SPAWN_ERROR_NOMEM;
break;
#endif
#ifdef ENOTDIR
case ENOTDIR:
return G_SPAWN_ERROR_NOTDIR;
break;
#endif
#ifdef ELOOP
case ELOOP:
return G_SPAWN_ERROR_LOOP;
break;
#endif
#ifdef ETXTBUSY
case ETXTBUSY:
return G_SPAWN_ERROR_TXTBUSY;
break;
#endif
#ifdef EIO
case EIO:
return G_SPAWN_ERROR_IO;
break;
#endif
#ifdef ENFILE
case ENFILE:
return G_SPAWN_ERROR_NFILE;
break;
#endif
#ifdef EMFILE
case EMFILE:
return G_SPAWN_ERROR_MFILE;
break;
#endif
#ifdef EINVAL
case EINVAL:
return G_SPAWN_ERROR_INVAL;
break;
#endif
#ifdef EISDIR
case EISDIR:
return G_SPAWN_ERROR_ISDIR;
break;
#endif
#ifdef ELIBBAD
case ELIBBAD:
return G_SPAWN_ERROR_LIBBAD;
break;
#endif
default:
return G_SPAWN_ERROR_FAILED;
break;
}
}
#endif /* HAVE_VFORK */
gboolean
gimp_spawn_async (gchar **argv,
gchar **envp,
GSpawnFlags flags,
GPid *child_pid,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv[0] != NULL, FALSE);
#ifdef HAVE_VFORK
if (flags == (G_SPAWN_LEAVE_DESCRIPTORS_OPEN |
G_SPAWN_DO_NOT_REAP_CHILD |
G_SPAWN_CHILD_INHERITS_STDIN))
{
pid_t pid;
pid = vfork ();
if (pid < 0)
{
gint errsv = errno;
g_set_error (error,
G_SPAWN_ERROR,
G_SPAWN_ERROR_FORK,
_("Failed to fork (%s)"),
g_strerror (errsv));
return FALSE;
}
else if (pid == 0)
{
if (envp)
execve (argv[0], argv, envp);
else
execv (argv[0], argv);
_exit (errno);
}
else
{
int status = -1;
pid_t result;
result = waitpid (pid, &status, WNOHANG);
if (result)
{
if (result < 0)
{
g_warning ("waitpid() should not fail in "
"gimp_spawn_async()");
}
if (WIFEXITED (status))
status = WEXITSTATUS (status);
else
status = -1;
g_set_error (error,
G_SPAWN_ERROR,
exec_err_to_g_error (status),
_("Failed to execute child process “%s” (%s)"),
argv[0],
g_strerror (status));
return FALSE;
}
if (child_pid) *child_pid = pid;
return TRUE;
}
}
#endif /* HAVE_VFORK */
return g_spawn_async (NULL, argv, envp, flags, NULL, NULL, child_pid, error);
}
void
gimp_spawn_set_cloexec (gint fd)
{
#if defined (G_OS_WIN32)
SetHandleInformation ((HANDLE) _get_osfhandle (fd), HANDLE_FLAG_INHERIT, 0);
#elif defined (HAVE_FCNTL_H)
fcntl (fd, F_SETFD, fcntl (fd, F_GETFD, 0) | FD_CLOEXEC);
#elif defined (__GNUC__)
#warning gimp_spawn_set_cloexec() is not implemented for the target platform
#endif
}
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