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| author | Denys Vlasenko | 2022-01-13 01:05:03 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2022-01-13 01:15:10 +0100 |
| commit | 68b402ee51f12f8c3b11638b042f57e025359faf (patch) | |
| tree | f7db9b14b44d89c448fd7d35cae821a97695f7f3 | |
| parent | d162a7b978a98b910e410dc10a40d5de12db0419 (diff) | |
| download | busybox-68b402ee51f12f8c3b11638b042f57e025359faf.zip busybox-68b402ee51f12f8c3b11638b042f57e025359faf.tar.gz | |
ash: ^C with SIG_INGed SIGINT should not exit the shell
function old new delta
__pgetc 501 522 +21
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | loginutils/login.c | 4 | ||||
| -rw-r--r-- | loginutils/sulogin.c | 5 | ||||
| -rw-r--r-- | shell/ash.c | 8 |
3 files changed, 15 insertions, 2 deletions
diff --git a/loginutils/login.c b/loginutils/login.c index 569053c..cac4349 100644 --- a/loginutils/login.c +++ b/loginutils/login.c @@ -608,7 +608,9 @@ int login_main(int argc UNUSED_PARAM, char **argv) * But without this, bash 3.0 will not enable ctrl-c either. * Maybe bash is buggy? * Need to find out what standards say about /bin/login - - * should we leave SIGINT etc enabled or disabled? */ + * should we leave SIGINT etc enabled or disabled? + * Also note: sulogin does not do it! Why? + */ signal(SIGINT, SIG_DFL); /* Exec login shell with no additional parameters */ diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c index 5f1c117..2f87c77 100644 --- a/loginutils/sulogin.c +++ b/loginutils/sulogin.c @@ -111,6 +111,11 @@ int sulogin_main(int argc UNUSED_PARAM, char **argv) } } + /* + * Note: login does this (should we do it too?): + */ + /*signal(SIGINT, SIG_DFL);*/ + /* Exec login shell with no additional parameters. Never returns. */ exec_login_shell(shell); } diff --git a/shell/ash.c b/shell/ash.c index 4c5dd12..12b2db3 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -10784,18 +10784,24 @@ preadfd(void) line_input_state->path_lookup = pathval(); # endif reinit_unicode_for_ash(); + again: nr = read_line_input(line_input_state, cmdedit_prompt, buf, IBUFSIZ); if (nr == 0) { /* ^C pressed, "convert" to SIGINT */ write(STDOUT_FILENO, "^C", 2); raise(SIGINT); + /* raise(SIGINT) did not work! (e.g. if SIGINT + * is SIG_INGed on startup, it stays SIG_IGNed) + */ if (trap[SIGINT]) { buf[0] = '\n'; buf[1] = '\0'; return 1; } exitstatus = 128 + SIGINT; - return -1; + /* bash behavior on ^C + ignored SIGINT: */ + write(STDOUT_FILENO, "\n", 1); + goto again; } if (nr < 0) { if (errno == 0) { |