diff options
Diffstat (limited to 'src/lib/fs/path.c')
| -rw-r--r-- | src/lib/fs/path.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/src/lib/fs/path.c b/src/lib/fs/path.c index dc1741447e..8194d920ab 100644 --- a/src/lib/fs/path.c +++ b/src/lib/fs/path.c @@ -1,6 +1,6 @@ /* Copyright (c) 2003, Roger Dingledine * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. - * Copyright (c) 2007-2020, The Tor Project, Inc. */ + * Copyright (c) 2007-2021, The Tor Project, Inc. */ /* See LICENSE for licensing information */ /** @@ -573,6 +573,19 @@ wrap_closedir(void *arg) closedir(arg); } #endif /* defined(GLOB_ALTDIRFUNC) */ + +/** Function passed to glob to handle processing errors. <b>epath</b> is the + * path that caused the error and <b>eerrno</b> is the errno set by the + * function that failed. We want to ignore ENOENT and ENOTDIR because, in BSD + * systems, these are not ignored automatically, which makes glob fail when + * globs expand to non-existing paths and GLOB_ERR is set. + */ +static int +glob_errfunc(const char *epath, int eerrno) +{ + (void)epath; + return eerrno == ENOENT || eerrno == ENOTDIR ? 0 : -1; +} #endif /* defined(HAVE_GLOB) */ /** Return a new list containing the paths that match the pattern @@ -593,7 +606,7 @@ tor_glob(const char *pattern) tor_free(pattern_normalized); #elif HAVE_GLOB /* !(defined(_WIN32)) */ glob_t matches; - int flags = GLOB_ERR | GLOB_NOSORT; + int flags = GLOB_NOSORT; #ifdef GLOB_ALTDIRFUNC /* use functions that call sandbox_intern_string */ flags |= GLOB_ALTDIRFUNC; @@ -606,18 +619,23 @@ tor_glob(const char *pattern) matches.gl_stat = &prot_stat; matches.gl_lstat = &prot_lstat; #endif /* defined(GLOB_ALTDIRFUNC) */ - int ret = glob(pattern, flags, NULL, &matches); + // use custom error handler to workaround BSD quirks and do not set GLOB_ERR + // because it would make glob fail on error even if the error handler ignores + // the error + int ret = glob(pattern, flags, glob_errfunc, &matches); if (ret == GLOB_NOMATCH) { return smartlist_new(); } else if (ret != 0) { return NULL; } - // #40141: workaround for bug in glibc < 2.19 where patterns ending in path - // separator match files and folders instead of folders only + // #40141, !249: workaround for glibc bug where patterns ending in path + // separator match files and folders instead of folders only. + // this could be in #ifdef __GLIBC__ but: 1. it might affect other libcs too, + // and 2. it doesn't cost much to stat each match again since libc is already + // supposed to do it (otherwise the file may be on slow NFS or something) size_t pattern_len = strlen(pattern); - bool dir_only = has_glob(pattern) && - pattern_len > 0 && pattern[pattern_len-1] == *PATH_SEPARATOR; + bool dir_only = pattern_len > 0 && pattern[pattern_len-1] == *PATH_SEPARATOR; result = smartlist_new(); size_t i; @@ -638,7 +656,7 @@ tor_glob(const char *pattern) #else (void)pattern; return result; -#endif /* !defined(HAVE_GLOB) */ +#endif /* defined(_WIN32) || ... */ return result; } |