libbb: add bb_unsetenv (taken from hush).
udhcpc: stop filtering environment passed to the script.
crond: fix uncovered potential bug (failing unsetenv)
mdev: fix uncovered potential bug (failing unsetenv)
tcp, udpsvd: fix uncovered potential bug (failing unsetenv)
function old new delta
safe_setenv - 58 +58
bb_unsetenv - 55 +55
builtin_unset 139 138 -1
tcpudpsvd_main 1843 1830 -13
free_strings_and_unsetenv 87 53 -34
udhcp_run_script 1186 1133 -53
safe_setenv4 62 - -62
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/4 up/down: 113/-163) Total: -50 bytes
diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 34cabc9..956de15 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -276,8 +276,7 @@
putenv(s);
if (system(command) == -1)
bb_perror_msg_and_die("can't run '%s'", command);
- s[4] = '\0';
- unsetenv(s);
+ unsetenv("MDEV");
free(s);
free(command);
}