-/* Copyright (C) 1991, 92, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <unistd.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <paths.h>
-
-
-/* The file is accessible but it is not an executable file. Invoke
- the shell to interpret it as a script. */
-static void
-internal_function
-script_execute (const char *file, char *const argv[])
-{
- /* Count the arguments. */
- int argc = 0;
- while (argv[argc++])
- ;
-
- /* Construct an argument list for the shell. */
- {
- char *new_argv[argc + 1];
- new_argv[0] = (char *) _PATH_BSHELL;
- new_argv[1] = (char *) file;
- while (argc > 1)
- {
- new_argv[argc] = argv[argc - 1];
- --argc;
- }
-
- /* Execute the shell. */
- __execve (new_argv[0], new_argv, __environ);
- }
-}
/* Execute FILE, searching in the `PATH' environment variable if it contains
const char *file;
char *const argv[];
{
- if (*file == '\0')
- {
- /* We check the simple case first. */
- __set_errno (ENOENT);
- return -1;
- }
-
- if (strchr (file, '/') != NULL)
- {
- /* Don't search when it contains a slash. */
- __execve (file, argv, __environ);
-
- if (errno == ENOEXEC)
- script_execute (file, argv);
- }
- else
- {
- int got_eacces = 0;
- char *path, *p, *name;
- size_t len;
- size_t pathlen;
-
- path = getenv ("PATH");
- if (path == NULL)
- {
- /* There is no `PATH' in the environment.
- The default search path is the current directory
- followed by the path `confstr' returns for `_CS_PATH'. */
- len = confstr (_CS_PATH, (char *) NULL, 0);
- path = (char *) __alloca (1 + len);
- path[0] = ':';
- (void) confstr (_CS_PATH, path + 1, len);
- }
-
- len = strlen (file) + 1;
- pathlen = strlen (path);
- name = __alloca (pathlen + len + 1);
- /* Copy the file name at the top. */
- name = (char *) memcpy (name + pathlen + 1, file, len);
- /* And add the slash. */
- *--name = '/';
-
- p = path;
- do
- {
- char *startp;
-
- path = p;
- p = __strchrnul (path, ':');
-
- if (p == path)
- /* Two adjacent colons, or a colon at the beginning or the end
- of `PATH' means to search the current directory. */
- startp = name + 1;
- else
- startp = (char *) memcpy (name - (p - path), path, p - path);
-
- /* Try to execute this name. If it works, execv will not return. */
- __execve (startp, argv, __environ);
-
- if (errno == ENOEXEC)
- script_execute (startp, argv);
-
- switch (errno)
- {
- case EACCES:
- /* Record the we got a `Permission denied' error. If we end
- up finding no executable we can use, we want to diagnose
- that we did find one but were denied access. */
- got_eacces = 1;
- case ENOENT:
- case ESTALE:
- case ENOTDIR:
- /* Those errors indicate the file is missing or not executable
- by us, in which case we want to just try the next path
- directory. */
- break;
-
- default:
- /* Some other error means we found an executable file, but
- something went wrong executing it; return the error to our
- caller. */
- return -1;
- }
- }
- while (*p++ != '\0');
-
- /* We tried every element and none of them worked. */
- if (got_eacces)
- /* At least one failure was due to permissions, so report that
- error. */
- __set_errno (EACCES);
- }
-
- /* Return the error from the last attempt (probably ENOENT). */
- return -1;
+ return __execvpe (file, argv, __environ);
}
+libc_hidden_def (execvp)
projects / thirdparty / glibc.git / blobdiff