shell_cmds-116.tar.gz

[apple/shell_cmds.git] / nohup / nohup.c

diff --git a/nohup/nohup.c b/nohup/nohup.c
index e939a7de92d35572e1d96e355b91889f57696005..cea00b77e400005a1acd0666b396881537d6f532 100644 (file)
--- a/nohup/nohup.c
+++ b/nohup/nohup.c
@@ -1,8 +1,7 @@
-/*     $NetBSD: nohup.c,v 1.8 1997/12/23 18:21:34 ross Exp $   */
-

 /*
 /*

- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1989, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ * Portions copyright (c) 2007 Apple Inc.  All rights reserved.

  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions


@@ -12,11 +11,7 @@
  * 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.
  * 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
+ * 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.
  *
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *


@@ -33,111 +28,121 @@
  * SUCH DAMAGE.
  */
 
  * SUCH DAMAGE.
  */
 

-#include <sys/cdefs.h>
+#if 0

 #ifndef lint
 #ifndef lint

-__COPYRIGHT(
-    "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
- All rights reserved.\n");
+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
 #endif /* not lint */
 
 #ifndef lint

-#if 0
-static char sccsid[] = "@(#)nohup.c    5.4 (Berkeley) 6/1/90";
-#endif
-__RCSID("$NetBSD: nohup.c,v 1.8 1997/12/23 18:21:34 ross Exp $");
+static char sccsid[] = "@(#)nohup.c    8.1 (Berkeley) 6/6/93";

 #endif /* not lint */
 #endif /* not lint */

+#endif
+#include <sys/cdefs.h>
+#ifndef __APPLE__
+__FBSDID("$FreeBSD: src/usr.bin/nohup/nohup.c,v 1.10 2003/05/03 19:44:46 obrien Exp $");
+#endif

 
 #include <sys/param.h>
 
 #include <sys/param.h>

-#include <sys/file.h>

 #include <sys/stat.h>
 #include <sys/stat.h>

+
+#include <err.h>
+#include <errno.h>

 #include <fcntl.h>
 #include <fcntl.h>

-#include <unistd.h>

 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

-#include <errno.h>
+#include <unistd.h>

 
 

-static void dofile __P((void));
-static void usage __P((void));
-int main __P((int, char **));
+#ifdef __APPLE__
+#include <vproc.h>
+#include <vproc_priv.h>
+#endif

 
 

-/* nohup shall exit with one of the following values:
-   126 - The utility was found but could not be invoked.
-   127 - An error occured in the nohup utility, or the utility could
-         not be found. */
-#define EXIT_NOEXEC    126
-#define EXIT_NOTFOUND  127
-#define EXIT_MISC      127
+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
 
 int

-main(argc, argv)
-       int argc;
-       char **argv;
+main(int argc, char *argv[])

 {
        int exit_status;
 
 {
        int exit_status;
 

-       if (argc < 2)
+       while (getopt(argc, argv, "") != -1)
+               usage();
+       argc -= optind;
+       argv += optind;
+       if (argc < 1)

                usage();
 
        if (isatty(STDOUT_FILENO))
                dofile();
                usage();
 
        if (isatty(STDOUT_FILENO))
                dofile();

-       if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) == -1) {
+       if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) == -1)

                /* may have just closed stderr */
                /* may have just closed stderr */

-               (void)fprintf(stdin, "nohup: %s\n", strerror(errno));
-               exit(EXIT_MISC);
-       }
+               err(EXIT_MISC, "%s", argv[0]);

 
 

-       /* The nohup utility shall take the standard action for all signals
-          except that SIGHUP shall be ignored. */

        (void)signal(SIGHUP, SIG_IGN);
 
        (void)signal(SIGHUP, SIG_IGN);
 

-       execvp(argv[1], &argv[1]);
+#ifdef __APPLE__
+       if (_vprocmgr_move_subset_to_user(geteuid(), "Background") != NULL)
+               err(EXIT_MISC, "can't migrate to background session");
+#endif
+       execvp(*argv, argv);

        exit_status = (errno == ENOENT) ? EXIT_NOTFOUND : EXIT_NOEXEC;
        exit_status = (errno == ENOENT) ? EXIT_NOTFOUND : EXIT_NOEXEC;

-       (void)fprintf(stderr, "nohup: %s: %s\n", argv[1], strerror(errno));
-       exit(exit_status);
+       err(exit_status, "%s", argv[0]);

 }
 
 static void
 }
 
 static void

-dofile()
+dofile(void)

 {
        int fd;
 {
        int fd;

-       char *p, path[MAXPATHLEN];
-
-       /* If the standard output is a terminal, all output written to 
-          its standard output shall be appended to the end of the file
-          nohup.out in the current directory.  If nohup.out cannot be
-          created or opened for appending, the output shall be appended
-          to the end of the file nohup.out in the directory specified 
-          by the HOME environment variable.
-
-          If a file is created, the file's permission bits shall be
-          set to S_IRUSR | S_IWUSR. */
-#define        FILENAME        "nohup.out"
+       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;
        p = FILENAME;

-       if ((fd = open(p, O_RDWR|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR)) >= 0)
+       fd = open(p, O_RDWR | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);
+       if (fd != -1)

                goto dupit;
                goto dupit;

-       if ((p = getenv("HOME")) != NULL) {
-               (void)strcpy(path, p);
-               (void)strcat(path, "/");
-               (void)strcat(path, FILENAME);
-               if ((fd = open(p = path, O_RDWR|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR)) >= 0)
+       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;
        }
                        goto dupit;
        }

-       (void)fprintf(stderr, "nohup: can't open a nohup.out file.\n");
-       exit(EXIT_MISC);
+       errx(EXIT_MISC, "can't open a nohup.out file");

 
 

-dupit: (void)lseek(fd, 0L, SEEK_END);
-       if (dup2(fd, STDOUT_FILENO) == -1) {
-               (void)fprintf(stderr, "nohup: %s\n", strerror(errno));
-               exit(EXIT_MISC);
-       }
-       (void)fprintf(stderr, "sending output to %s\n", p);
+dupit:
+#ifdef __APPLE__
+       (void)lseek(fd, 0L, SEEK_END);
+#endif
+       if (dup2(fd, STDOUT_FILENO) == -1)
+               err(EXIT_MISC, NULL);
+       (void)fprintf(stderr, "appending output to %s\n", p);

 }
 
 static void
 }
 
 static void

-usage()
+usage(void)

 {
 {

-       (void)fprintf(stderr, "usage: nohup command\n");
+       (void)fprintf(stderr, "usage: nohup [--] utility [arguments]\n");

        exit(EXIT_MISC);
 }
        exit(EXIT_MISC);
 }