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| author | Eric Andersen | 2001-04-03 22:50:52 +0000 |
|---|---|---|
| committer | Eric Andersen | 2001-04-03 22:50:52 +0000 |
| commit | 60b2d8d2c8bf9e1bb3f34a3b16b272c2539a6318 (patch) | |
| tree | 28a3e4396e8b8c69b51c793fb16198002272f894 /libbb/trim.c | |
| parent | c97ec34370f66771713809ab7da19b7fe923cffe (diff) | |
| download | busybox-60b2d8d2c8bf9e1bb3f34a3b16b272c2539a6318.zip busybox-60b2d8d2c8bf9e1bb3f34a3b16b272c2539a6318.tar.gz | |
if strlen(s) was 0, it would then end up using s[-1] as an array index. Bad,
bad, bad. This was crashing the shell on powerpc boxes, though all other archs
seem to have a much more forgiving malloc implementations. I finally found
this bug using electric-fence on a powerpc box.
-Erik
Diffstat (limited to 'libbb/trim.c')
| -rw-r--r-- | libbb/trim.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/libbb/trim.c b/libbb/trim.c index 8a9b07a..be97d49 100644 --- a/libbb/trim.c +++ b/libbb/trim.c @@ -33,13 +33,14 @@ void trim(char *s) { + int len; + /* trim trailing whitespace */ - while (isspace(s[strlen(s)-1])) - s[strlen(s)-1]='\0'; + while ( (len=strlen(s)) >= 1 && isspace(s[len-1])) + s[len-1]='\0'; /* trim leading whitespace */ - memmove(s, &s[strspn(s, " \n\r\t\v")], strlen(s)); - + memmove(s, &s[strspn(s, " \n\r\t\v")], len); } /* END CODE */ |