41 lines
988 B
C
41 lines
988 B
C
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/* 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 <stdlib.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "util.h"
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enum { Error = 127, Found = 126 };
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int
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main(int argc, char *argv[])
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{
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int fd;
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struct sigaction sa;
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if(getopt(argc, argv, "") != -1)
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exit(Error);
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if(optind == argc)
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enprintf(Error, "usage: %s command [argument...]\n", argv[0]);
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sa.sa_handler = SIG_IGN;
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if(sigaction(SIGHUP, &sa, NULL) == -1)
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enprintf(Error, "sigaction 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)) == -1)
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enprintf(Error, "open nohup.out:");
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if(dup2(fd, STDOUT_FILENO) == -1)
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enprintf(Error, "dup2:");
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close(fd);
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}
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if(isatty(STDERR_FILENO))
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if(dup2(STDOUT_FILENO, STDERR_FILENO) == -1)
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enprintf(Error, "dup2:");
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execvp(argv[optind], &argv[optind]);
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enprintf(errno == ENOENT ? Error : Found, "exec %s:", argv[optind]);
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return Error;
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}
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