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| author | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2009-10-26 23:29:03 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-10-27 17:34:36 +0100 |
| commit | e039e689e3c4baefb4b62703429aaf86eef1bd99 (patch) | |
| tree | 41d75770e7e1bb36a2662fa9c273ab4c806dc3c3 | |
| parent | a48308701a4d89d7cc0d0557cfabaec94a0bb3b0 (diff) | |
wall: new applet
text data bss dec hex filename
81 0 0 81 51 miscutils/wall.o
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | include/applets.h | 1 | ||||
| -rw-r--r-- | include/usage.h | 8 | ||||
| -rw-r--r-- | miscutils/Config.in | 6 | ||||
| -rw-r--r-- | miscutils/Kbuild | 1 | ||||
| -rw-r--r-- | miscutils/wall.c | 36 | ||||
| -rw-r--r-- | scripts/defconfig | 1 |
6 files changed, 53 insertions, 0 deletions
diff --git a/include/applets.h b/include/applets.h index 134f21e2f..9683f1ec8 100644 --- a/include/applets.h +++ b/include/applets.h @@ -417,6 +417,7 @@ IF_VCONFIG(APPLET(vconfig, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_VI(APPLET(vi, _BB_DIR_BIN, _BB_SUID_DROP)) IF_VLOCK(APPLET(vlock, _BB_DIR_USR_BIN, _BB_SUID_REQUIRE)) IF_VOLNAME(APPLET(volname, _BB_DIR_USR_BIN, _BB_SUID_DROP)) +IF_WALL(APPLET(wall, _BB_DIR_USR_BIN, _BB_SUID_REQUIRE)) IF_WATCH(APPLET(watch, _BB_DIR_BIN, _BB_SUID_DROP)) IF_WATCHDOG(APPLET(watchdog, _BB_DIR_SBIN, _BB_SUID_DROP)) IF_WC(APPLET(wc, _BB_DIR_USR_BIN, _BB_SUID_DROP)) diff --git a/include/usage.h b/include/usage.h index 93eb2f6ba..72b6acc47 100644 --- a/include/usage.h +++ b/include/usage.h @@ -4950,6 +4950,14 @@ #define volname_full_usage "\n\n" \ "Show CD volume name of the DEVICE (default /dev/cdrom)" +#define wall_trivial_usage \ + "[file]" +#define wall_full_usage "\n\n" \ + "Write content of file or standard-input to all logged-in users" +#define wall_sample_usage \ + "echo foo | wall\n" \ + "wall ./mymessage" + #define watch_trivial_usage \ "[-n seconds] [-t] PROG [ARGS]" #define watch_full_usage "\n\n" \ diff --git a/miscutils/Config.in b/miscutils/Config.in index 9b804889b..842f7f9d2 100644 --- a/miscutils/Config.in +++ b/miscutils/Config.in @@ -612,6 +612,12 @@ config VOLNAME help Prints a CD-ROM volume name. +config WALL + bool "wall" + default n + help + Write a message to all users that are logged in. + config WATCHDOG bool "watchdog" default n diff --git a/miscutils/Kbuild b/miscutils/Kbuild index d88cb39ac..22a9adb34 100644 --- a/miscutils/Kbuild +++ b/miscutils/Kbuild @@ -42,4 +42,5 @@ lib-$(CONFIG_TIME) += time.o lib-$(CONFIG_TIMEOUT) += timeout.o lib-$(CONFIG_TTYSIZE) += ttysize.o lib-$(CONFIG_VOLNAME) += volname.o +lib-$(CONFIG_WALL) += wall.o lib-$(CONFIG_WATCHDOG) += watchdog.o diff --git a/miscutils/wall.c b/miscutils/wall.c new file mode 100644 index 000000000..2dbab60b4 --- /dev/null +++ b/miscutils/wall.c @@ -0,0 +1,36 @@ +/* vi: set sw=4 ts=4: */ +/* + * wall - write a message to all logged-in users + * Copyright (c) 2009 Bernhard Reutner-Fischer + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "libbb.h" +#include <utmp.h> + +int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int wall_main(int argc UNUSED_PARAM, char **argv) +{ + struct utmp *ut; + char *msg; + int fd = argv[1] ? xopen(argv[1], O_RDONLY) : STDIN_FILENO; + + msg = xmalloc_read(fd, NULL); + if (ENABLE_FEATURE_CLEAN_UP && argv[1]) + close(fd); + setutent(); + while ((ut = getutent()) != NULL) { + char *line; + if (ut->ut_type != USER_PROCESS) + continue; + line = concat_path_file("/dev", ut->ut_line); + xopen_xwrite_close(line, msg); + free(line); + } + if (ENABLE_FEATURE_CLEAN_UP) { + endutent(); + free(msg); + } + return EXIT_SUCCESS; +} diff --git a/scripts/defconfig b/scripts/defconfig index 797f275d1..f8a92d4c3 100644 --- a/scripts/defconfig +++ b/scripts/defconfig @@ -638,6 +638,7 @@ CONFIG_TIME=y CONFIG_TIMEOUT=y CONFIG_TTYSIZE=y CONFIG_VOLNAME=y +CONFIG_WALL=y CONFIG_WATCHDOG=y # |