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Date: Mon, 22 Oct 2007 11:19:22 -0400
From: Theodore Ts'o <tytso@....edu>
To: linux-ext4@...r.kernel.org
Cc: Eric Sandeen <sandeen@...hat.com>, Theodore Ts'o <tytso@....edu>
Subject: [PATCH] badblocks: Factor out calls to strtoul to a helper function
The strtoul() function has a lot of messy error checking that needs to
be done; by factoring it out into one place we can make sure it's done
right in all of the places where it is called.
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
misc/badblocks.c | 61 ++++++++++++++++++++++-------------------------------
1 files changed, 25 insertions(+), 36 deletions(-)
diff --git a/misc/badblocks.c b/misc/badblocks.c
index a768a8a..709effe 100644
--- a/misc/badblocks.c
+++ b/misc/badblocks.c
@@ -819,11 +819,27 @@ static void check_mount(char *device_name)
}
+/*
+ * This function will convert a string to an unsigned long, printing
+ * an error message if it fails, and returning success or failure in err.
+ */
+static unsigned int parse_uint(const char *str, const char *descr)
+{
+ char *tmp;
+ unsigned long ret;
+
+ ret = strtoul(str, &tmp, 0);
+ if (*tmp || errno || (ret > UINT_MAX) ||
+ (ret == ULONG_MAX && errno == ERANGE)) {
+ com_err (program_name, 0, _("invalid %s - %s"), descr, str);
+ exit (1);
+ }
+ return ret;
+}
int main (int argc, char ** argv)
{
int c;
- char * tmp;
char * device_name;
char * host_device_name = NULL;
char * input_file = NULL;
@@ -871,8 +887,8 @@ int main (int argc, char ** argv)
while ((c = getopt (argc, argv, "b:fi:o:svwnc:p:h:t:X")) != EOF) {
switch (c) {
case 'b':
- block_size = strtoul (optarg, &tmp, 0);
- if (*tmp || block_size > 4096) {
+ block_size = parse_uint(optarg, "block size");
+ if (block_size > 4096) {
com_err (program_name, 0,
_("bad block size - %s"), optarg);
exit (1);
@@ -906,20 +922,11 @@ int main (int argc, char ** argv)
w_flag = 2;
break;
case 'c':
- blocks_at_once = strtoul (optarg, &tmp, 0);
- if (*tmp) {
- com_err (program_name, 0,
- "bad simultaneous block count - %s", optarg);
- exit (1);
- }
+ blocks_at_once = parse_uint(optarg, "blocks at once");
break;
case 'p':
- num_passes = strtoul (optarg, &tmp, 0);
- if (*tmp) {
- com_err (program_name, 0,
- "bad number of clean passes - %s", optarg);
- exit (1);
- }
+ num_passes = parse_uint(optarg,
+ "number of clean passes");
break;
case 'h':
host_device_name = optarg;
@@ -942,13 +949,7 @@ int main (int argc, char ** argv)
if (!strcmp(optarg, "r") || !strcmp(optarg,"random")) {
t_patts[t_flag++] = ~0;
} else {
- pattern = strtoul(optarg, &tmp, 0);
- if (*tmp) {
- com_err(program_name, 0,
- _("invalid test_pattern: %s\n"),
- optarg);
- exit(1);
- }
+ pattern = parse_uint(optarg, "test pattern");
if (pattern == (unsigned int) ~0)
pattern = 0xffff;
t_patts[t_flag++] = pattern;
@@ -995,27 +996,15 @@ int main (int argc, char ** argv)
}
} else {
errno = 0;
- last_block = strtoul (argv[optind], &tmp, 0);
+ last_block = parse_uint(argv[optind], "last block");
printf("last_block = %d (%s)\n", last_block, argv[optind]);
- if (*tmp || errno ||
- (last_block == ULONG_MAX && errno == ERANGE)) {
- com_err (program_name, 0, _("invalid blocks count - %s"),
- argv[optind]);
- exit (1);
- }
last_block++;
optind++;
}
if (optind <= argc-1) {
errno = 0;
- from_count = strtoul (argv[optind], &tmp, 0);
+ from_count = parse_uint(argv[optind], "start block");
printf("from_count = %d\n", from_count);
- if (*tmp || errno ||
- (from_count == ULONG_MAX && errno == ERANGE)) {
- com_err (program_name, 0, _("invalid starting block - %s"),
- argv[optind]);
- exit (1);
- }
} else from_count = 0;
if (from_count >= last_block) {
com_err (program_name, 0, _("invalid starting block (%lu): must be less than %lu"),
--
1.5.3.4.1232.g9991d-dirty
-
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