d2824f5294
This reverts commit 9016d288f1.
Tools that have no options are required by POSIX to support "--" so
that conforming applications have a way to shield their operands from
implementations that provide options as an extension.
echo(1) is just an exception, so it is handled specially.
See OPTIONS in https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/utilities/V3_chap01.html#tag_17_04
49 lines
890 B
C
49 lines
890 B
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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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("execvp %s:", argv[0]);
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_exit(126 + (savederrno == ENOENT));
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}
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