/*- * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 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. */ #include #include #include #include #include #include #include #include "lib.h" #ifndef lint __RCSID("$NetBSD: fexec.c,v 1.7 2003/09/23 15:07:43 christos Exp $"); #endif static int vfcexec(const char *, int, const char *, va_list); static int vfcexec(const char *path, int skipempty, const char *arg, va_list ap) { static unsigned int max = 4; static const char **argv = NULL; unsigned int argc; pid_t child; int status; if (argv == NULL) { argv = malloc(max * sizeof(const char *)); if (argv == NULL) { warn("vfcexec: Can't alloc arg space"); return -1; } } argv[0] = arg; argc = 1; do { if (argc == max) { unsigned int new; const char **ptr; new = max * 2; ptr = realloc(argv, new * sizeof(const char *)); if (ptr == NULL) { warn("vfcexec: Can't alloc arg space"); free(argv); argv = NULL; max = 4; return -1; } argv = ptr; max = new; } arg = va_arg(ap, const char *); if (skipempty && arg && strlen(arg) == 0) continue; argv[argc++] = arg; } while (arg != NULL); child = vfork(); switch (child) { case 0: if ((path != NULL) && (chdir(path) < 0)) _exit(127); (void) execvp(argv[0], (char ** const)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); } 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; }