diff options
| author | Denys Vlasenko | 2017-10-12 19:20:13 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2017-10-12 19:20:13 +0200 |
| commit | a2e32b324eb7440f0cd4992f54f7a5822c145e91 (patch) | |
| tree | 7b36bca131ac4f8f2f535f9b8b66dcb0c7860cf7 /shell | |
| parent | 0fd5dbba8f34e006aa0e999002d31e79daf2fdf3 (diff) | |
| download | busybox-a2e32b324eb7440f0cd4992f54f7a5822c145e91.zip busybox-a2e32b324eb7440f0cd4992f54f7a5822c145e91.tar.gz | |
ash: survive failures in $PS1 expansion. Closes 10371
function old new delta
expandstr 120 209 +89
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/ash.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/shell/ash.c b/shell/ash.c index 39705a3..ef81ea7 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -12656,7 +12656,24 @@ expandstr(const char *ps, int syntax_type) saveprompt = doprompt; doprompt = 0; - readtoken1(pgetc(), syntax_type, FAKEEOFMARK, 0); + + /* readtoken1() might die horribly. + * Try a prompt with syntacticallyt wrong command: + * PS1='$(date "+%H:%M:%S) > ' + */ + { + volatile int saveint; + struct jmploc *volatile savehandler = exception_handler; + struct jmploc jmploc; + SAVE_INT(saveint); + if (setjmp(jmploc.loc) == 0) { + exception_handler = &jmploc; + readtoken1(pgetc(), syntax_type, FAKEEOFMARK, 0); + } + exception_handler = savehandler; + RESTORE_INT(saveint); + } + doprompt = saveprompt; popfile(); |