35 lines
600 B
C
35 lines
600 B
C
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#include <stdio.h>
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#include <sys/file.h>
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#include <errno.h>
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extern char *sys_errlist[];
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main(int argc, char *argv[])
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{
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if (argc != 3) {
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fprintf(stderr, "usage: doshell <ttyname> <shellname> &\n");
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exit(1);
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}
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/* close down fd's */
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close(0);
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close(1);
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close(2);
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/* detach from parent process's group */
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setsid();
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/* open new tty */
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if (open(argv[1], O_RDWR, 0) == -1)
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exit(2);
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dup(0);
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dup(0);
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execlp(argv[2], "-", 0);
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/* should appear on new tty...: */
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fprintf(stderr, "can't exec shell: %s\n", sys_errlist[errno]);
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exit(3);
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}
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