diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2016-10-30 18:41:01 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2016-10-30 18:41:01 +0100 |
| commit | d4f3db9427c443b2709fc9a00bc46d8a71be806b (patch) | |
| tree | f71b9fd8f2eb1509621ec434fb9b664928f637dc /shell | |
| parent | 474ed06c3939391cbfd7b70bf4960403ae166762 (diff) | |
| download | busybox-d4f3db9427c443b2709fc9a00bc46d8a71be806b.tar.gz | |
ash: if using libc glob(), skip it if no metachars are in word
This saves making tons of pointless stat() calls
function old new delta
expandarg 888 921 +33
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/ash.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/shell/ash.c b/shell/ash.c index d617168b9..ecd2146e4 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -7047,6 +7047,21 @@ expandmeta(struct strlist *str /*, int flag*/) if (fflag) goto nometa; + + /* Avoid glob() (and thus, stat() et al) for words like "echo" */ + p = str->text; + while (*p) { + if (*p == '*') + goto need_glob; + if (*p == '?') + goto need_glob; + if (*p == '[') + goto need_glob; + p++; + } + goto nometa; + + need_glob: INT_OFF; p = preglob(str->text, RMESCAPE_ALLOC | RMESCAPE_HEAP); // GLOB_NOMAGIC (GNU): if no *?[ chars in pattern, return it even if no match |