commit b80728a115213abfaab6b3a124caac617ce5d253 Author: George Kadianakis <desnacked@riseup.net> Date: Tue Apr 3 16:20:24 2012 +0200 tor_vsscanf(): Don't return -1 if '%%' doesn't match. tor_vsscanf() is supposed to return the current number of matches on match failure. --- changes/bug5558 | 3 +++ src/common/util.c | 2 +- src/test/test_util.c | 6 +++++- 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/changes/bug5558 b/changes/bug5558 new file mode 100644 index 0000000..90ab3a6 --- /dev/null +++ b/changes/bug5558 @@ -0,0 +1,3 @@ + o Minor bugfixes + - Enforce correct return behavior of tor_vsscanf(), when the '%%' + pattern is used. Fixes bug 5558. diff --git a/src/common/util.c b/src/common/util.c index 266368c..551ee17 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -2773,7 +2773,7 @@ tor_vsscanf(const char *buf, const char *pattern, va_list ap) ++n_matched; } else if (*pattern == '%') { if (*buf != '%') - return -1; + return n_matched; ++buf; ++pattern; } else { diff --git a/src/test/test_util.c b/src/test/test_util.c index 88f00e0..f2123c5 100644 --- a/src/test/test_util.c +++ b/src/test/test_util.c @@ -1384,7 +1384,6 @@ test_util_sscanf(void) test_eq(-1, tor_sscanf("wrong", "%5c", s1)); /* %c cannot have a number. */ test_eq(-1, tor_sscanf("hello", "%s", s1)); /* %s needs a number. */ test_eq(-1, tor_sscanf("prettylongstring", "%999999s", s1)); - test_eq(-1, tor_sscanf("We're the 99 monkeys", "We're the 99%%")); #if 0 /* GCC thinks these two are illegal. */ test_eq(-1, tor_sscanf("prettylongstring", "%0s", s1)); @@ -1468,6 +1467,11 @@ test_util_sscanf(void) /* Literal '%' (ie. '%%') */ test_eq(1, tor_sscanf("99% fresh", "%3u%% fresh", &u1)); test_eq(99, u1); + test_eq(0, tor_sscanf("99 fresh", "%% %3u %s", &u1, s1)); + test_eq(1, tor_sscanf("99 fresh", "%3u%% %s", &u1, s1)); + test_eq(2, tor_sscanf("99 fresh", "%3u %5s %%", &u1, s1)); + test_eq(99, u1); + test_streq(s1, "fresh"); test_eq(1, tor_sscanf("% boo", "%% %3s", s1)); test_streq("boo", s1);