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hush: stop ignoring ^Z in child shells

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This commit is contained in:
Denis Vlasenko 2009-04-15 23:29:44 +00:00
parent c4ada79343
commit 74a931ac9e
1 changed files with 19 additions and 8 deletions
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27
shell/hush.c
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@ -2276,15 +2276,28 @@ void re_execute_shell(char ***to_free, const char *s, char *argv0, char **argv);
static void reset_traps_to_defaults(void) static void reset_traps_to_defaults(void)
{ {
enum {
JOBSIGS = (1 << SIGTTIN) | (1 << SIGTTOU) | (1 << SIGTSTP)
};
unsigned sig; unsigned sig;
int dirty;
if (!G.traps) if (!G.traps && !(G.non_DFL_mask & JOBSIGS))
return; return;
dirty = 0;
for (sig = 0; sig < NSIG; sig++) { /* This function is always called in a child shell.
if (!G.traps[sig]) * Child shells are not interactive.
* SIGTTIN/SIGTTOU/SIGTSTP should not have special handling.
* Testcase: (while :; do :; done) + ^Z should background.
*/
G.non_DFL_mask &= ~JOBSIGS;
sigdelset(&G.blocked_set, SIGTTIN);
sigdelset(&G.blocked_set, SIGTTOU);
sigdelset(&G.blocked_set, SIGTSTP);
if (G.traps) for (sig = 0; sig < NSIG; sig++) {
if (!G.traps[sig]) {
continue; continue;
}
free(G.traps[sig]); free(G.traps[sig]);
G.traps[sig] = NULL; G.traps[sig] = NULL;
/* There is no signal for 0 (EXIT) */ /* There is no signal for 0 (EXIT) */
@ -2296,10 +2309,8 @@ static void reset_traps_to_defaults(void)
if (sig < 32 && (G.non_DFL_mask & (1 << sig))) if (sig < 32 && (G.non_DFL_mask & (1 << sig)))
continue; continue;
sigdelset(&G.blocked_set, sig); sigdelset(&G.blocked_set, sig);
dirty = 1;
} }
if (dirty) sigprocmask(SIG_SETMASK, &G.blocked_set, NULL);
sigprocmask(SIG_SETMASK, &G.blocked_set, NULL);
} }
#else /* !BB_MMU */ #else /* !BB_MMU */