diff options
Diffstat (limited to 'shell/ash.c')
| -rw-r--r-- | shell/ash.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/shell/ash.c b/shell/ash.c index f8c3e0c19..40b3ef3e3 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -7038,27 +7038,42 @@ expandmeta(struct strlist *str /*, int flag*/) goto nometa; INT_OFF; p = preglob(str->text, RMESCAPE_ALLOC | RMESCAPE_HEAP); - /* - * GLOB_NOMAGIC (GNU): if no *?[ chars in pattern, return it even if no match - * TODO?: GLOB_NOCHECK: if no match, return unchanged pattern (sans \* escapes?) - */ - i = glob(p, GLOB_NOMAGIC, NULL, &pglob); +// GLOB_NOMAGIC (GNU): if no *?[ chars in pattern, return it even if no match +// GLOB_NOCHECK: if no match, return unchanged pattern (sans \* escapes?) +// +// glibc 2.24.90 glob(GLOB_NOMAGIC) does not remove backslashes used for escaping: +// if you pass it "file\?", it returns "file\?", not "file?", if no match. +// Which means you need to unescape the string, right? Not so fast: +// if there _is_ a file named "file\?" (with backslash), it is returned +// as "file\?" too (whichever pattern you used to find it, say, "file*"). +// You DONT KNOW by looking at the result whether you need to unescape it. +// +// Worse, globbing of "file\?" in a directory with two files, "file?" and "file\?", +// returns "file\?" - which is WRONG: "file\?" pattern matches "file?" file. +// Without GLOB_NOMAGIC, this works correctly ("file?" is returned as a match). +// With GLOB_NOMAGIC | GLOB_NOCHECK, this also works correctly. +// i = glob(p, GLOB_NOMAGIC | GLOB_NOCHECK, NULL, &pglob); +// i = glob(p, GLOB_NOMAGIC, NULL, &pglob); + i = glob(p, 0, NULL, &pglob); + //bb_error_msg("glob('%s'):%d '%s'...", p, i, pglob.gl_pathv ? pglob.gl_pathv[0] : "-"); if (p != str->text) free(p); switch (i) { case 0: +#if 0 // glibc 2.24.90 bug? Patterns like "*/file", when match, don't set GLOB_MAGCHAR /* GLOB_MAGCHAR is set if *?[ chars were seen (GNU) */ if (!(pglob.gl_flags & GLOB_MAGCHAR)) goto nometa2; +#endif addglob(&pglob); globfree(&pglob); INT_ON; break; case GLOB_NOMATCH: -nometa2: + //nometa2: globfree(&pglob); INT_ON; -nometa: + nometa: *exparg.lastp = str; rmescapes(str->text, 0); exparg.lastp = &str->next; |