diff options
| -rw-r--r-- | include/applets.h | 3 | ||||
| -rw-r--r-- | include/usage.h | 7 | ||||
| -rw-r--r-- | init/Makefile.in | 1 | ||||
| -rw-r--r-- | init/config.in | 1 | ||||
| -rw-r--r-- | init/mesg.c | 58 |
5 files changed, 70 insertions, 0 deletions
diff --git a/include/applets.h b/include/applets.h index 38d75344f..f6a840024 100644 --- a/include/applets.h +++ b/include/applets.h @@ -293,6 +293,9 @@ #ifdef CONFIG_MD5SUM APPLET(md5sum, md5sum_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER) #endif +#ifdef CONFIG_MESG + APPLET(mesg, mesg_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER) +#endif #ifdef CONFIG_MKDIR APPLET(mkdir, mkdir_main, _BB_DIR_BIN, _BB_SUID_NEVER) #endif diff --git a/include/usage.h b/include/usage.h index 98b81cf1d..ee697150b 100644 --- a/include/usage.h +++ b/include/usage.h @@ -1149,6 +1149,13 @@ "busybox: OK\n" \ "^D\n" +#define mesg_trivial_usage \ + "mesg [y|n]" +#define mesg_full_usage \ + "mesg [Y|N], controls write access to your terminal\n" \ + "\ty\tAllow write access to your terminal.\n" \ + "\tn\tDisallow write access to your terminal.\n" + #define mkdir_trivial_usage \ "[OPTION] DIRECTORY..." #define mkdir_full_usage \ diff --git a/init/Makefile.in b/init/Makefile.in index 8cc95264d..cd3ead839 100644 --- a/init/Makefile.in +++ b/init/Makefile.in @@ -25,6 +25,7 @@ endif INIT-y:= INIT-$(CONFIG_HALT) += halt.o INIT-$(CONFIG_INIT) += init.o +INIT-$(CONFIG_MESG) += mesg.o INIT-$(CONFIG_POWEROFF) += poweroff.o INIT-$(CONFIG_REBOOT) += reboot.o INIT-$(CONFIG_START_STOP_DAEMON) += start_stop_daemon.o diff --git a/init/config.in b/init/config.in index 58fe1d8e3..e4aa4fbba 100644 --- a/init/config.in +++ b/init/config.in @@ -22,6 +22,7 @@ fi bool 'start-stop-daemon' CONFIG_START_STOP_DAEMON bool 'run-parts' CONFIG_RUN_PARTS +bool 'mesg' CONFIG_MESG endmenu diff --git a/init/mesg.c b/init/mesg.c new file mode 100644 index 000000000..f9b46e029 --- /dev/null +++ b/init/mesg.c @@ -0,0 +1,58 @@ +/* + * mesg implementation for busybox + * + * Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <unistd.h> +#include <stdlib.h> +#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 + +extern int mesg_main(int argc, char *argv[]) +{ + struct stat sb; + char *tty; + char c; + + if ((--argc == 0) + || ((argc == 1) && (((c = **++argv) == 'y') || (c == 'n')))) { + if ((tty = ttyname(STDERR_FILENO)) == NULL) { + tty = "ttyname"; + } else if (stat(tty, &sb) == 0) { + if (argc == 0) { + puts(((sb.st_mode & (S_IWGRP | S_IWOTH)) == + 0) ? "is n" : "is y"); + return EXIT_SUCCESS; + } + if (chmod + (tty, + (c == + 'y') ? sb.st_mode | (S_IWGRP_OR_S_IWOTH) : sb. + st_mode & ~(S_IWGRP | S_IWOTH)) == 0) { + return EXIT_SUCCESS; + } + } + perror_msg_and_die("%s", tty); + } + show_usage(); +} |