a6ee96af7c
1) no need to include sys/stat.h 2) remove the enum which just added a layer too thick on this simple program 3) argc-style, other style 4) weprintf instead of enprintf, then save the error-message of execvp before and return the proper status. 5) write consistent "not reached" comment.
48 lines
895 B
C
48 lines
895 B
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <unistd.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s cmd [arg ...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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int fd, savederrno;
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ARGBEGIN {
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default:
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usage();
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} ARGEND;
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if (!argc)
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usage();
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if (signal(SIGHUP, SIG_IGN) == SIG_ERR)
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enprintf(127, "signal HUP:");
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if (isatty(STDOUT_FILENO)) {
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if ((fd = open("nohup.out", O_APPEND | O_CREAT, S_IRUSR | S_IWUSR)) < 0)
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enprintf(127, "open nohup.out:");
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if (dup2(fd, STDOUT_FILENO) < 0)
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enprintf(127, "dup2:");
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close(fd);
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}
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if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) < 0)
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enprintf(127, "dup2:");
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execvp(argv[0], argv);
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savederrno = errno;
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weprintf("exec %s:", argv[0]);
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_exit(126 + (savederrno == ENOENT));
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return 0; /* not reached */
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}
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