07e462f01f
boolean. * libmisc/basename.c: Avoid implicit conversion of pointer to boolean. * libmisc/basename.c, lib/prototypes.h (Basename): Return a constant string. * libmisc/basename.c, libmisc/obscure.c, lib/prototypes.h, libmisc/xmalloc.c, libmisc/getdate.h, libmisc/system.c, libmisc/getgr_nam_gid.c, libmisc/failure.c, libmisc/valid.c: Add splint annotations. * libmisc/chowndir.c: Avoid memory leak. * libmisc/chowndir.c: Do not check *printf/*puts return value. * libmisc/chowntty.c: Avoid implicit conversion between integer types. * libmisc/obscure.c: Return a bool when possible instead of int. * libmisc/shell.c: Do not check *printf/*puts return value. * libmisc/shell.c: Do not check execle return value. * libmisc/setupenv.c: Avoid implicit conversion between integer types. * libmisc/xmalloc.c: size should not be zero to avoid returning NULL pointers. * libmisc/hushed.c: Do not check *printf/*puts return value. * libmisc/system.c: Avoid implicit conversion of integer to boolean. safe_system last argument is a boolean. * libmisc/system.c: Check return value of dup2. * libmisc/system.c: Do not check *printf/*puts return value. * libmisc/system.c: Do not check execve return value. * libmisc/salt.c: Do not check *printf/*puts return value. * libmisc/loginprompt.c: Do not check gethostname return value. * libmisc/find_new_gid.c, libmisc/find_new_uid.c: Do not check gr_rewind/pw_rewind return value. * libmisc/ttytype.c: Limit the number of parsed characters in the sscanf format. * libmisc/ttytype.c: Test if a type was really read. * libmisc/sub.c: Do not check *printf/*puts return value. * libmisc/sub.c: Avoid implicit conversion of integer to boolean. * src/userdel.c: Fix typo in comment. * src/userdel.c: Avoid implicit conversion of boolean to integer. * src/userdel.c: safe_system last argument is a boolean. * src/newusers.c: Avoid implicit conversion of boolean to integer. * src/newusers.c: Avoid implicit conversion of integer to boolean. * src/usermod.c: Add brackets. * src/usermod.c: Avoid implicit conversion of characters or integers to booleans. * src/vipw.c: Avoid implicit conversion of integer to boolean. * src/su.c: Avoid implicit conversion of integer to boolean. * src/su.c: Add brackets. * src/useradd.c: Avoid implicit conversion of characters or integers to booleans.
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
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* Copyright (c) 1989 - 1991, Julianne Frances Haugh
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* Copyright (c) 1996 - 1998, Marek Michałkiewicz
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* Copyright (c) 2003 - 2006, Tomasz Kłoczko
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* Copyright (c) 2009 , Nicolas François
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#ident "$Id$"
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#include <stdio.h>
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#include <errno.h>
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#include "prototypes.h"
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#include "defines.h"
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extern char **newenvp;
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extern size_t newenvc;
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/*
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* shell - execute the named program
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*
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* shell begins by trying to figure out what argv[0] is going to
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* be for the named process. The user may pass in that argument,
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* or it will be the last pathname component of the file with a
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* '-' prepended.
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* Then, it executes the named file.
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*/
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int shell (const char *file, /*@null@*/const char *arg, char *const envp[])
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{
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char arg0[1024];
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int err;
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if (file == (char *) 0) {
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errno = EINVAL;
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return errno;
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}
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/*
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* The argv[0]'th entry is usually the path name, but
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* for various reasons the invoker may want to override
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* that. So, we determine the 0'th entry only if they
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* don't want to tell us what it is themselves.
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*/
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if (arg == (char *) 0) {
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(void) snprintf (arg0, sizeof arg0, "-%s", Basename ((char *) file));
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arg0[sizeof arg0 - 1] = '\0';
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arg = arg0;
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}
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/*
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* First we try the direct approach. The system should be
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* able to figure out what we are up to without too much
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* grief.
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*/
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(void) execle (file, arg, (char *) 0, envp);
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err = errno;
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if (access (file, R_OK|X_OK) == 0) {
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/*
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* Assume this is a shell script (with no shebang).
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* Interpret it with /bin/sh
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*/
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(void) execle (SHELL, "sh", "-", file, (char *)0, envp);
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err = errno;
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}
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/*
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* Obviously something is really wrong - I can't figure out
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* how to execute this stupid shell, so I might as well give
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* up in disgust ...
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*/
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(void) snprintf (arg0, sizeof arg0, _("Cannot execute %s"), file);
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errno = err;
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perror (arg0);
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return err;
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}
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