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