/* $NetBSD: fexec.c,v 1.1.1.3 2009/08/06 16:55:26 joerg Exp $ */ /*- * Copyright (c) 2003 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matthias Scheler. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 HAVE_CONFIG_H #include "config.h" #endif #include #if HAVE_SYS_CDEFS_H #include #endif #if HAVE_SYS_WAIT_H #include #endif #if HAVE_ERR_H #include #endif #if HAVE_ERRNO_H #include #endif #if HAVE_STDARG_H #include #endif #if HAVE_STDLIB_H #include #endif #if HAVE_UNISTD_H #include #endif #include "lib.h" __RCSID("$NetBSD: fexec.c,v 1.1.1.3 2009/08/06 16:55:26 joerg Exp $"); static int vfcexec(const char *, int, const char *, va_list); /* * fork, then change current working directory to path and * execute the command and arguments in the argv array. * wait for the command to finish, then return the exit status. */ int pfcexec(const char *path, const char *file, const char **argv) { pid_t child; int status; child = vfork(); switch (child) { case 0: if ((path != NULL) && (chdir(path) < 0)) _exit(127); (void)execvp(file, __UNCONST(argv)); _exit(127); /* NOTREACHED */ case -1: return -1; } while (waitpid(child, &status, 0) < 0) { if (errno != EINTR) return -1; } if (!WIFEXITED(status)) return -1; return WEXITSTATUS(status); } static int vfcexec(const char *path, int skipempty, const char *arg, va_list ap) { const char **argv; size_t argv_size, argc; int retval; argv_size = 16; argv = xcalloc(argv_size, sizeof(*argv)); argv[0] = arg; argc = 1; do { if (argc == argv_size) { argv_size *= 2; argv = xrealloc(argv, argv_size * sizeof(*argv)); } arg = va_arg(ap, const char *); if (skipempty && arg && strlen(arg) == 0) continue; argv[argc++] = arg; } while (arg != NULL); retval = pfcexec(path, argv[0], argv); free(argv); return retval; } int fexec(const char *arg, ...) { va_list ap; int result; va_start(ap, arg); result = vfcexec(NULL, 0, arg, ap); va_end(ap); return result; } int fexec_skipempty(const char *arg, ...) { va_list ap; int result; va_start(ap, arg); result = vfcexec(NULL, 1, arg, ap); va_end(ap); return result; } int fcexec(const char *path, const char *arg, ...) { va_list ap; int result; va_start(ap, arg); result = vfcexec(path, 0, arg, ap); va_end(ap); return result; }