diff options
Diffstat (limited to 'lib/libc/gen/exec.c')
| -rw-r--r-- | lib/libc/gen/exec.c | 284 |
1 files changed, 0 insertions, 284 deletions
diff --git a/lib/libc/gen/exec.c b/lib/libc/gen/exec.c deleted file mode 100644 index b83136e..0000000 --- a/lib/libc/gen/exec.c +++ /dev/null @@ -1,284 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93"; -#endif /* LIBC_SCCS and not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include <sys/param.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <errno.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <paths.h> - -#include <stdarg.h> -#include "un-namespace.h" -#include "libc_private.h" - -extern char **environ; - -int -execl(const char *name, const char *arg, ...) -{ - va_list ap; - const char **argv; - int n; - - va_start(ap, arg); - n = 1; - while (va_arg(ap, char *) != NULL) - n++; - va_end(ap); - argv = alloca((n + 1) * sizeof(*argv)); - if (argv == NULL) { - errno = ENOMEM; - return (-1); - } - va_start(ap, arg); - n = 1; - argv[0] = arg; - while ((argv[n] = va_arg(ap, char *)) != NULL) - n++; - va_end(ap); - return (_execve(name, __DECONST(char **, argv), environ)); -} - -int -execle(const char *name, const char *arg, ...) -{ - va_list ap; - const char **argv; - char **envp; - int n; - - va_start(ap, arg); - n = 1; - while (va_arg(ap, char *) != NULL) - n++; - va_end(ap); - argv = alloca((n + 1) * sizeof(*argv)); - if (argv == NULL) { - errno = ENOMEM; - return (-1); - } - va_start(ap, arg); - n = 1; - argv[0] = arg; - while ((argv[n] = va_arg(ap, char *)) != NULL) - n++; - envp = va_arg(ap, char **); - va_end(ap); - return (_execve(name, __DECONST(char **, argv), envp)); -} - -int -execlp(const char *name, const char *arg, ...) -{ - va_list ap; - const char **argv; - int n; - - va_start(ap, arg); - n = 1; - while (va_arg(ap, char *) != NULL) - n++; - va_end(ap); - argv = alloca((n + 1) * sizeof(*argv)); - if (argv == NULL) { - errno = ENOMEM; - return (-1); - } - va_start(ap, arg); - n = 1; - argv[0] = arg; - while ((argv[n] = va_arg(ap, char *)) != NULL) - n++; - va_end(ap); - return (execvp(name, __DECONST(char **, argv))); -} - -int -execv(name, argv) - const char *name; - char * const *argv; -{ - (void)_execve(name, argv, environ); - return (-1); -} - -int -execvp(const char *name, char * const *argv) -{ - return (_execvpe(name, argv, environ)); -} - -static int -execvPe(const char *name, const char *path, char * const *argv, - char * const *envp) -{ - const char **memp; - size_t cnt, lp, ln; - int eacces, save_errno; - char *cur, buf[MAXPATHLEN]; - const char *p, *bp; - struct stat sb; - - eacces = 0; - - /* If it's an absolute or relative path name, it's easy. */ - if (index(name, '/')) { - bp = name; - cur = NULL; - goto retry; - } - bp = buf; - - /* If it's an empty path name, fail in the usual POSIX way. */ - if (*name == '\0') { - errno = ENOENT; - return (-1); - } - - cur = alloca(strlen(path) + 1); - if (cur == NULL) { - errno = ENOMEM; - return (-1); - } - strcpy(cur, path); - while ((p = strsep(&cur, ":")) != NULL) { - /* - * It's a SHELL path -- double, leading and trailing colons - * mean the current directory. - */ - if (*p == '\0') { - p = "."; - lp = 1; - } else - lp = strlen(p); - ln = strlen(name); - - /* - * If the path is too long complain. This is a possible - * security issue; given a way to make the path too long - * the user may execute the wrong program. - */ - if (lp + ln + 2 > sizeof(buf)) { - (void)_write(STDERR_FILENO, "execvP: ", 8); - (void)_write(STDERR_FILENO, p, lp); - (void)_write(STDERR_FILENO, ": path too long\n", - 16); - continue; - } - bcopy(p, buf, lp); - buf[lp] = '/'; - bcopy(name, buf + lp + 1, ln); - buf[lp + ln + 1] = '\0'; - -retry: (void)_execve(bp, argv, envp); - switch (errno) { - case E2BIG: - goto done; - case ELOOP: - case ENAMETOOLONG: - case ENOENT: - break; - case ENOEXEC: - for (cnt = 0; argv[cnt]; ++cnt) - ; - memp = alloca((cnt + 2) * sizeof(char *)); - if (memp == NULL) { - /* errno = ENOMEM; XXX override ENOEXEC? */ - goto done; - } - memp[0] = "sh"; - memp[1] = bp; - bcopy(argv + 1, memp + 2, cnt * sizeof(char *)); - (void)_execve(_PATH_BSHELL, - __DECONST(char **, memp), envp); - goto done; - case ENOMEM: - goto done; - case ENOTDIR: - break; - case ETXTBSY: - /* - * We used to retry here, but sh(1) doesn't. - */ - goto done; - default: - /* - * EACCES may be for an inaccessible directory or - * a non-executable file. Call stat() to decide - * which. This also handles ambiguities for EFAULT - * and EIO, and undocumented errors like ESTALE. - * We hope that the race for a stat() is unimportant. - */ - save_errno = errno; - if (stat(bp, &sb) != 0) - break; - if (save_errno == EACCES) { - eacces = 1; - continue; - } - errno = save_errno; - goto done; - } - } - if (eacces) - errno = EACCES; - else - errno = ENOENT; -done: - return (-1); -} - -int -execvP(const char *name, const char *path, char * const argv[]) -{ - return execvPe(name, path, argv, environ); -} - -int -_execvpe(const char *name, char * const argv[], char * const envp[]) -{ - const char *path; - - /* Get the path we're searching. */ - if ((path = getenv("PATH")) == NULL) - path = _PATH_DEFPATH; - - return (execvPe(name, path, argv, envp)); -} |
