diff options
Diffstat (limited to 'miscutils')
| -rw-r--r-- | miscutils/Config.in | 6 | ||||
| -rw-r--r-- | miscutils/Kbuild | 1 | ||||
| -rw-r--r-- | miscutils/wall.c | 36 |
3 files changed, 43 insertions, 0 deletions
diff --git a/miscutils/Config.in b/miscutils/Config.in index 9b80488..842f7f9 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 d88cb39..22a9adb 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 0000000..2dbab60 --- /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; +} |