diff options
Diffstat (limited to 'builtin-grep.c')
| -rw-r--r-- | builtin-grep.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/builtin-grep.c b/builtin-grep.c index 694da5b..4510d35 100644 --- a/builtin-grep.c +++ b/builtin-grep.c @@ -431,6 +431,19 @@ static const char emsg_missing_context_len[] = static const char emsg_missing_argument[] = "option requires an argument -%s"; +static int strtoul_ui(char const *s, unsigned int *result) +{ + unsigned long ul; + char *p; + + errno = 0; + ul = strtoul(s, &p, 10); + if (errno || *p || p == s || (unsigned int) ul != ul) + return -1; + *result = ul; + return 0; +} + int cmd_grep(int argc, const char **argv, const char *prefix) { int hit = 0; @@ -553,7 +566,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix) scan = arg + 1; break; } - if (sscanf(scan, "%u", &num) != 1) + if (strtoul_ui(scan, &num)) die(emsg_invalid_context_len, scan); switch (arg[1]) { case 'A': |