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wall: new applet

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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>
This commit is contained in:
Bernhard Reutner-Fischer 2009-10-26 23:29:03 +01:00 committed by Denys Vlasenko
parent a48308701a
commit e039e689e3
6 changed files with 53 additions and 0 deletions
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1
include/applets.h
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@ -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))

8
include/usage.h
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@ -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" \

6
miscutils/Config.in
View File

@ -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

1
miscutils/Kbuild
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@ -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

36
miscutils/wall.c Normal file
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@ -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;
}

1
scripts/defconfig
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@ -638,6 +638,7 @@ CONFIG_TIME=y
CONFIG_TIMEOUT=y
CONFIG_TTYSIZE=y
CONFIG_VOLNAME=y
CONFIG_WALL=y
CONFIG_WATCHDOG=y
#