debugfs: Fix error handling in strtoblk() and common_block_args_process()

Fix strtoblk() to allow a block number 0, and
common_block_args_process() so it prints an error message if a block
number that can't be parsed by strtoul().

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/debugfs/util.c b/debugfs/util.c
index 7031850..cb84bd2 100644 (file)
--- a/debugfs/util.c
+++ b/debugfs/util.c
@@ -274,10 +274,8 @@ int strtoblk(const char *cmd, const char *str, blk_t *ret)
 
        blk = parse_ulong(str, cmd, "block number", &err);
        *ret = blk;
-       if (err == 0 && blk == 0) {
-               com_err(cmd, 0, "Invalid block number 0");
-               err = 1;
-       }
+       if (err)
+               com_err(cmd, 0, "Invalid block number: %s", str);
        return err;
 }
 
@@ -337,6 +335,11 @@ int common_block_args_process(int argc, char *argv[],
 
        if (strtoblk(argv[0], argv[1], block))
                return 1;
+       if (*block == 0) {
+               com_err(argv[0], 0, "Invalid block number 0");
+               err = 1;
+       }
+
        if (argc > 2) {
                *count = parse_ulong(argv[2], argv[0], "count", &err);
                if (err)