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Makefile
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Makefile.depend
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nohup.1
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nohup.c
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Editing: nohup.c
/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 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. * 3. 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 0 #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1989, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)nohup.c 8.1 (Berkeley) 6/6/93"; #endif /* not lint */ #endif #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/stat.h> #include <err.h> #include <errno.h> #include <fcntl.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> static void dofile(void); static void usage(void); #define FILENAME "nohup.out" /* * POSIX mandates that we exit with: * 126 - If the utility was found, but failed to execute. * 127 - If any other error occurred. */ #define EXIT_NOEXEC 126 #define EXIT_NOTFOUND 127 #define EXIT_MISC 127 int main(int argc, char *argv[]) { int exit_status; while (getopt(argc, argv, "") != -1) usage(); argc -= optind; argv += optind; if (argc < 1) usage(); if (isatty(STDOUT_FILENO)) dofile(); if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) == -1) /* may have just closed stderr */ err(EXIT_MISC, "%s", argv[0]); (void)signal(SIGHUP, SIG_IGN); execvp(*argv, argv); exit_status = (errno == ENOENT) ? EXIT_NOTFOUND : EXIT_NOEXEC; err(exit_status, "%s", argv[0]); } static void dofile(void) { int fd; char path[MAXPATHLEN]; const char *p; /* * POSIX mandates if the standard output is a terminal, the standard * output is appended to nohup.out in the working directory. Failing * that, it will be appended to nohup.out in the directory obtained * from the HOME environment variable. If file creation is required, * the mode_t is set to S_IRUSR | S_IWUSR. */ p = FILENAME; fd = open(p, O_RDWR | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR); if (fd != -1) goto dupit; if ((p = getenv("HOME")) != NULL && *p != '\0' && (size_t)snprintf(path, sizeof(path), "%s/%s", p, FILENAME) < sizeof(path)) { fd = open(p = path, O_RDWR | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR); if (fd != -1) goto dupit; } errx(EXIT_MISC, "can't open a nohup.out file"); dupit: if (dup2(fd, STDOUT_FILENO) == -1) err(EXIT_MISC, NULL); (void)fprintf(stderr, "appending output to %s\n", p); } static void usage(void) { (void)fprintf(stderr, "usage: nohup [--] utility [arguments]\n"); exit(EXIT_MISC); }
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