-/* Copyright (C) 1991, 1992, 1995, 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1991-2019 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.
+ The GNU C Library is free software; you can redistribute it and/or
+ 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.
+ 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
+ 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., 675 Mass Ave,
-Cambridge, MA 02139, 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>
+
/* Execute FILE, searching in the `PATH' environment variable if it contains
no slashes, with arguments ARGV and environment from `environ'. */
int
-execvp (file, argv)
- const char *file;
- char *const argv[];
+execvp (const char *file, char *const argv[])
{
- int got_eacces = 0;
-
- void execute (const char *file, char *const argv[])
- {
- execv (file, argv);
-
- if (errno == ENOEXEC)
- {
- /* The file is accessible but it is not an executable file.
- Invoke the shell to interpret it as a script. */
-
- /* 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. */
- execv (new_argv[0], new_argv);
- }
- }
- }
-
- if (strchr (file, '/') != NULL)
- /* Don't search when it contains a slash. */
- execute (file, argv);
- else
- {
- char *path, *p, *name;
- size_t len;
-
- 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;
- name = __alloca (strlen (path) + len);
- p = path;
- do
- {
- path = p;
- p = strchr (path, ':');
- if (p == NULL)
- p = strchr (path, '\0');
-
- if (p == path)
- /* Two adjacent colons, or a colon at the beginning or the end
- of `PATH' means to search the current directory. */
- (void) memcpy (name, file, len);
- else
- {
- /* Construct the pathname to try. */
- (void) memcpy (name, path, p - path);
- name[p - path] = '/';
- (void) memcpy (&name[(p - path) + 1], file, len);
- }
-
- /* Try to execute this name. If it works, execv will not return. */
- execute (name, 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:
- /* 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