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Diffstat (limited to '')
| -rw-r--r-- | app/core/gimp-spawn.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/app/core/gimp-spawn.c b/app/core/gimp-spawn.c new file mode 100644 index 0000000..bfa08e8 --- /dev/null +++ b/app/core/gimp-spawn.c @@ -0,0 +1,250 @@ +/* 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 +} |