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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2009-10-26 23:29:03 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2009-10-27 17:34:36 +0100
commite039e689e3c4baefb4b62703429aaf86eef1bd99 (patch)
tree41d75770e7e1bb36a2662fa9c273ab4c806dc3c3 /miscutils
parenta48308701a4d89d7cc0d0557cfabaec94a0bb3b0 (diff)
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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>
Diffstat (limited to 'miscutils')
-rw-r--r--miscutils/Config.in6
-rw-r--r--miscutils/Kbuild1
-rw-r--r--miscutils/wall.c36
3 files changed, 43 insertions, 0 deletions
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
612 help 612 help
613 Prints a CD-ROM volume name. 613 Prints a CD-ROM volume name.
614 614
615config WALL
616 bool "wall"
617 default n
618 help
619 Write a message to all users that are logged in.
620
615config WATCHDOG 621config WATCHDOG
616 bool "watchdog" 622 bool "watchdog"
617 default n 623 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-$(CONFIG_TIME) += time.o
42lib-$(CONFIG_TIMEOUT) += timeout.o 42lib-$(CONFIG_TIMEOUT) += timeout.o
43lib-$(CONFIG_TTYSIZE) += ttysize.o 43lib-$(CONFIG_TTYSIZE) += ttysize.o
44lib-$(CONFIG_VOLNAME) += volname.o 44lib-$(CONFIG_VOLNAME) += volname.o
45lib-$(CONFIG_WALL) += wall.o
45lib-$(CONFIG_WATCHDOG) += watchdog.o 46lib-$(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 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * wall - write a message to all logged-in users
4 * Copyright (c) 2009 Bernhard Reutner-Fischer
5 *
6 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7 */
8
9#include "libbb.h"
10#include <utmp.h>
11
12int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
13int wall_main(int argc UNUSED_PARAM, char **argv)
14{
15 struct utmp *ut;
16 char *msg;
17 int fd = argv[1] ? xopen(argv[1], O_RDONLY) : STDIN_FILENO;
18
19 msg = xmalloc_read(fd, NULL);
20 if (ENABLE_FEATURE_CLEAN_UP && argv[1])
21 close(fd);
22 setutent();
23 while ((ut = getutent()) != NULL) {
24 char *line;
25 if (ut->ut_type != USER_PROCESS)
26 continue;
27 line = concat_path_file("/dev", ut->ut_line);
28 xopen_xwrite_close(line, msg);
29 free(line);
30 }
31 if (ENABLE_FEATURE_CLEAN_UP) {
32 endutent();
33 free(msg);
34 }
35 return EXIT_SUCCESS;
36}