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48 lines
1014 B
C
48 lines
1014 B
C
/* vi: set sw=4 ts=4: */
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/*
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* mesg implementation for busybox
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*
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* Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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#include "busybox.h"
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#include <unistd.h>
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#include <stdlib.h>
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#ifdef USE_TTY_GROUP
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#define S_IWGRP_OR_S_IWOTH S_IWGRP
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#else
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#define S_IWGRP_OR_S_IWOTH (S_IWGRP | S_IWOTH)
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#endif
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int mesg_main(int argc, char *argv[])
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{
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struct stat sb;
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char *tty;
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char c = 0;
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if ((--argc == 0)
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|| ((argc == 1) && (((c = **++argv) == 'y') || (c == 'n')))) {
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if ((tty = ttyname(STDERR_FILENO)) == NULL) {
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tty = "ttyname";
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} else if (stat(tty, &sb) == 0) {
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if (argc == 0) {
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puts(((sb.st_mode & (S_IWGRP | S_IWOTH)) ==
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0) ? "is n" : "is y");
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return EXIT_SUCCESS;
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}
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if (chmod
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(tty,
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(c ==
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'y') ? sb.st_mode | (S_IWGRP_OR_S_IWOTH) : sb.
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st_mode & ~(S_IWGRP | S_IWOTH)) == 0) {
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return EXIT_SUCCESS;
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}
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}
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bb_perror_msg_and_die("%s", tty);
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}
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bb_show_usage();
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}
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