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authorGravatar Denys Vlasenko <vda.linux@googlemail.com>2015-10-09 16:42:57 +0200
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2015-10-09 16:42:57 +0200
commit550bf5b4a418378cd8f9fbbf5252fe57acdacb5a (patch)
tree7ed13e04cf415be6830363953220d7cffd4580b8 /shell
parent4cd99e7c6c1af77721b890ed5ae26d747796c4bd (diff)
downloadbusybox-550bf5b4a418378cd8f9fbbf5252fe57acdacb5a.tar.gz
busybox-550bf5b4a418378cd8f9fbbf5252fe57acdacb5a.tar.bz2
remove global "jmp_buf die_jmp" from !FEATURE_PREFER_APPLETS builds
function old new delta xfunc_has_died - 21 +21 sleep_much - 12 +12 sleep10 - 9 +9 die_func - 4 +4 fflush_stdout_and_exit 35 36 +1 builtin_type 121 119 -2 die_sleep 4 - -4 xfunc_die 60 24 -36 hush_main 1128 1011 -117 die_jmp 156 - -156 ------------------------------------------------------------------------------ (add/remove: 4/2 grow/shrink: 1/3 up/down: 47/-315) Total: -268 bytes text data bss dec hex filename 939992 992 17652 958636 ea0ac busybox_old 939880 992 17496 958368 e9fa0 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
-rw-r--r--shell/hush.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/shell/hush.c b/shell/hush.c
index f085ed3eb..0d107715f 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1479,10 +1479,11 @@ static sighandler_t install_sighandler(int sig, sighandler_t handler)
#if ENABLE_HUSH_JOB
+static void xfunc_has_died(void);
/* After [v]fork, in child: do not restore tty pgrp on xfunc death */
-# define disable_restore_tty_pgrp_on_exit() (die_sleep = 0)
+# define disable_restore_tty_pgrp_on_exit() (die_func = NULL)
/* After [v]fork, in parent: restore tty pgrp on xfunc death */
-# define enable_restore_tty_pgrp_on_exit() (die_sleep = -1)
+# define enable_restore_tty_pgrp_on_exit() (die_func = xfunc_has_died)
/* Restores tty foreground process group, and exits.
* May be called as signal handler for fatal signal
@@ -1587,6 +1588,15 @@ static void hush_exit(int exitcode)
#endif
}
+static void xfunc_has_died(void) NORETURN;
+static void xfunc_has_died(void)
+{
+ /* xfunc has failed! die die die */
+ /* no EXIT traps, this is an escape hatch! */
+ G.exiting = 1;
+ hush_exit(xfunc_error_retval);
+}
+
//TODO: return a mask of ALL handled sigs?
static int check_and_run_traps(void)
@@ -7866,12 +7876,7 @@ int hush_main(int argc, char **argv)
/* Initialize some more globals to non-zero values */
cmdedit_update_prompt();
- if (setjmp(die_jmp)) {
- /* xfunc has failed! die die die */
- /* no EXIT traps, this is an escape hatch! */
- G.exiting = 1;
- hush_exit(xfunc_error_retval);
- }
+ die_func = xfunc_has_died;
/* Shell is non-interactive at first. We need to call
* install_special_sighandlers() if we are going to execute "sh <script>",
@@ -8129,9 +8134,7 @@ int hush_main(int argc, char **argv)
/* Grab control of the terminal */
tcsetpgrp(G_interactive_fd, getpid());
}
- /* -1 is special - makes xfuncs longjmp, not exit
- * (we reset die_sleep = 0 whereever we [v]fork) */
- enable_restore_tty_pgrp_on_exit(); /* sets die_sleep = -1 */
+ enable_restore_tty_pgrp_on_exit();
# if ENABLE_HUSH_SAVEHISTORY && MAX_HISTORY > 0
{