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- /*
- * Copyright (c) 1989 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)nohup.c 5.4 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <sys/signal.h>
- #include <sys/file.h>
- #include <unistd.h>
- #include <stdio.h>
-
- extern int errno;
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- char *strerror();
-
- if (argc < 2)
- usage();
-
- if (isatty(STDOUT_FILENO))
- dofile();
- if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) == -1) {
- /* may have just closed stderr */
- (void)fprintf(stdin, "nohup: %s\n", strerror(errno));
- exit(1);
- }
-
- (void)signal(SIGHUP, SIG_IGN);
- (void)signal(SIGQUIT, SIG_IGN);
-
- execvp(argv[1], &argv[1]);
- (void)fprintf(stderr,
- "nohup: %s: %s\n", argv[1], strerror(errno));
- exit(1);
- }
-
- dofile()
- {
- int fd;
- char *p, path[MAXPATHLEN];
- off_t lseek();
- char *getenv(), *strcpy(), *strcat(), *strerror();
-
- #define FILENAME "nohup.out"
- p = FILENAME;
- if ((fd = open(p, O_RDWR|O_CREAT, 0600)) >= 0)
- goto dupit;
- if (p = getenv("HOME")) {
- (void)strcpy(path, p);
- (void)strcat(path, "/");
- (void)strcat(path, FILENAME);
- if ((fd = open(p = path, O_RDWR|O_CREAT, 0600)) >= 0)
- goto dupit;
- }
- (void)fprintf(stderr, "nohup: can't open a nohup.out file.\n");
- exit(1);
-
- dupit: (void)lseek(fd, 0L, SEEK_END);
- if (dup2(fd, STDOUT_FILENO) == -1) {
- (void)fprintf(stderr, "nohup: %s\n", strerror(errno));
- exit(1);
- }
- (void)fprintf(stderr, "sending output to %s\n", p);
- }
-
- usage()
- {
- (void)fprintf(stderr, "usage: nohup command\n");
- exit(1);
- }
-