diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2023-01-26 14:56:33 +0300 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2023-01-26 14:56:33 +0300 |
| commit | 93e0898c663a533082b5f3c2e7dcce93ec47076d (patch) | |
| tree | d44936a40fcac122b94d4b235195e6832446b27b /libbb | |
| parent | c2739e11dee92770839ac9b2dbf020459baec7b9 (diff) | |
shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256
function old new delta
record_pending_signo 32 63 +31
lineedit_read_key 231 224 -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 31/-7) Total: 24 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/lineedit.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/libbb/lineedit.c b/libbb/lineedit.c index d6b2e76ff..b942f540a 100644 --- a/libbb/lineedit.c +++ b/libbb/lineedit.c @@ -2180,7 +2180,8 @@ static int lineedit_read_key(char *read_key_buffer, int timeout) * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls". * * If LI_INTERRUPTIBLE, return -1 if got EINTR in poll() - * inside read_key, or if bb_got_signal != 0 (IOW: if signal + * inside read_key and bb_got_signal became != 0, + * or if bb_got_signal != 0 (IOW: if signal * arrived before poll() is reached). * * Note: read_key sets errno to 0 on success. @@ -2197,14 +2198,16 @@ static int lineedit_read_key(char *read_key_buffer, int timeout) IF_FEATURE_EDITING_WINCH(S.ok_to_redraw = 0;) if (errno != EINTR) break; + /* It was EINTR. Repeat read_key() unless... */ if (state->flags & LI_INTERRUPTIBLE) { - /* LI_INTERRUPTIBLE bails out on EINTR, - * but nothing really guarantees that bb_got_signal - * is nonzero. Follow the least surprise principle: + /* LI_INTERRUPTIBLE bails out on EINTR + * if bb_got_signal became nonzero. + * (It may stay zero: for example, our SIGWINCH + * handler does not set it. This is used for signals + * which should not interrupt line editing). */ - if (bb_got_signal == 0) - bb_got_signal = 255; - goto ret; + if (bb_got_signal != 0) + goto ret; /* will return -1 */ } } |