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wall: access FILE under real user's credentials

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While at it, move applet/config/kbuild bits into wall.c.
(This way, it's more visible that applet is suid'ed).

function                                             old     new   delta
wall_main                                             87     138     +51

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2013-10-06 15:14:25 +02:00
parent 3eab2b7675
commit cd256e1c40
4 changed files with 24 additions and 11 deletions
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2
include/applets.src.h
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@ -407,8 +407,6 @@ IF_VCONFIG(APPLET(vconfig, BB_DIR_SBIN, BB_SUID_DROP))
/* Needs to be run by root or be suid root - needs to change uid and gid: */
IF_VLOCK(APPLET(vlock, BB_DIR_USR_BIN, BB_SUID_REQUIRE))
IF_VOLNAME(APPLET(volname, BB_DIR_USR_BIN, BB_SUID_DROP))
/* Needs to be run by root or be suid root - needs to write to /dev/TTY: */
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))