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cf9cc6963c
The variable declarations for the buffers have been aligned in this commit, so that they appear in the diff, making it easier to review. Some important but somewhat tangent changes included in this commit: - lib/nss.c: The size was being defined as 65, but then used as 64. That was a bug, although not an important one; we were just wasting one byte. Fix that while we replace snprintf() by SNPRINTF(), which will get the size from sizeof(), and thus will use the real size. Signed-off-by: Alejandro Colomar <alx@kernel.org>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
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* SPDX-FileCopyrightText: 1989 - 1991, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2009 , Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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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#include "string/sprintf.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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int err;
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char arg0[1024];
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if (file == NULL) {
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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 == NULL) {
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SNPRINTF(arg0, "-%s", Basename(file));
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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 *) NULL, 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 *) NULL, 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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SNPRINTF(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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