diff options
| -rw-r--r-- | changes/bug5355 | 4 | ||||
| -rw-r--r-- | src/common/compat.c | 27 |
2 files changed, 24 insertions, 7 deletions
diff --git a/changes/bug5355 b/changes/bug5355 new file mode 100644 index 0000000000..f850fe1f1d --- /dev/null +++ b/changes/bug5355 @@ -0,0 +1,4 @@ + o Major bugfixes: + - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX. Fixes + bug 5355; bugfix on 0.2.3.11-alpha. + diff --git a/src/common/compat.c b/src/common/compat.c index 30bde3d1ca..ec365c38a4 100644 --- a/src/common/compat.c +++ b/src/common/compat.c @@ -1645,7 +1645,10 @@ make_path_absolute(char *fname) return absfname; #else - char path[PATH_MAX+1]; +/* We use this as a starting path length. Not too large seems sane. */ +#define START_PATH_LENGTH 100 + size_t path_length = START_PATH_LENGTH; + char *path = tor_malloc(path_length); char *absfname = NULL; tor_assert(fname); @@ -1653,13 +1656,23 @@ make_path_absolute(char *fname) if (fname[0] == '/') { absfname = tor_strdup(fname); } else { - if (getcwd(path, PATH_MAX) != NULL) { - tor_asprintf(&absfname, "%s/%s", path, fname); - } else { - /* If getcwd failed, the best we can do here is keep using the - * relative path. (Perhaps / isn't readable by this UID/GID.) */ - absfname = tor_strdup(fname); + int save_errno = errno; + errno = 0; + while (getcwd(path, path_length) == NULL) { + if (errno == ERANGE) { + path_length*=2; + path = tor_realloc(path, path_length); + } else { + /* If getcwd failed with an error other than ERANGE, the best we can + * do here is keep using the relative path. (Perhaps / isn't readable + * by this UID/GID.) */ + absfname = tor_strdup(fname); + break; + } } + errno = save_errno; + tor_asprintf(&absfname, "%s/%s", path, fname); + tor_free(path); } return absfname; |