commit 6574d4bd27471c30da934c4d8b82ecbe2b3eab7e Author: Nick Mathewson nickm@torproject.org Date: Tue Jul 10 10:26:22 2018 -0400

Refactor dirserv_read_measured_bandwidths to have a single exit point --- src/feature/dircache/dirserv.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/src/feature/dircache/dirserv.c b/src/feature/dircache/dirserv.c index c5286b0cb..50869c2b9 100644 --- a/src/feature/dircache/dirserv.c +++ b/src/feature/dircache/dirserv.c @@ -2616,6 +2616,7 @@ dirserv_read_measured_bandwidths(const char *from_file, * if there are additional header lines, as introduced in Bandwidth List spec * version 1.1.0 */ int line_is_after_headers = 0; + int rv = -1;

/* Initialise line, so that we can't possibly run off the end. */ memset(line, 0, sizeof(line)); @@ -2623,21 +2624,19 @@ dirserv_read_measured_bandwidths(const char *from_file, if (fp == NULL) { log_warn(LD_CONFIG, "Can't open bandwidth file at configured location: %s", from_file); - return -1; + goto err; }

/* If fgets fails, line is either unmodified, or indeterminate. */ if (!fgets(line, sizeof(line), fp)) { log_warn(LD_DIRSERV, "Empty bandwidth file"); - fclose(fp); - return -1; + goto err; }

if (!strlen(line) || line[strlen(line)-1] != '\n') { log_warn(LD_DIRSERV, "Long or truncated time in bandwidth file: %s", escaped(line)); - fclose(fp); - return -1; + goto err; }

line[strlen(line)-1] = '\0'; @@ -2645,16 +2644,14 @@ dirserv_read_measured_bandwidths(const char *from_file, if (!ok) { log_warn(LD_DIRSERV, "Non-integer time in bandwidth file: %s", escaped(line)); - fclose(fp); - return -1; + goto err; }

now = time(NULL); if ((now - file_time) > MAX_MEASUREMENT_AGE) { log_warn(LD_DIRSERV, "Bandwidth measurement file stale. Age: %u", (unsigned)(time(NULL) - file_time)); - fclose(fp); - return -1; + goto err; }

if (routerstatuses) @@ -2679,11 +2676,15 @@ dirserv_read_measured_bandwidths(const char *from_file, /* Now would be a nice time to clean the cache, too */ dirserv_expire_measured_bw_cache(now);

- fclose(fp); log_info(LD_DIRSERV, "Bandwidth measurement file successfully read. " "Applied %d measurements.", applied_lines); - return 0; + rv = 0; + + err: + if (fp) + fclose(fp); + return rv; }

/** As dirserv_get_routerdescs(), but instead of getting signed_descriptor_t