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| author | Sami Kerola | 2011-05-24 22:56:38 +0200 |
|---|---|---|
| committer | Karel Zak | 2011-06-01 09:57:43 +0200 |
| commit | e53bc9604c14b10c34a1e8d057d2e741e8d7ea1b (patch) | |
| tree | ee1986aca50d3f9da15f335ef309cf6a02ff7875 /lib/strutils.c | |
| parent | col: coding style changes (diff) | |
| download | kernel-qcow2-util-linux-e53bc9604c14b10c34a1e8d057d2e741e8d7ea1b.tar.gz kernel-qcow2-util-linux-e53bc9604c14b10c34a1e8d057d2e741e8d7ea1b.tar.xz kernel-qcow2-util-linux-e53bc9604c14b10c34a1e8d057d2e741e8d7ea1b.zip | |
lib: add strtoul_or_err() function
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'lib/strutils.c')
| -rw-r--r-- | lib/strutils.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/strutils.c b/lib/strutils.c index 07010f32c..e7a2454a0 100644 --- a/lib/strutils.c +++ b/lib/strutils.c @@ -213,6 +213,30 @@ err: errx(EXIT_FAILURE, "%s: '%s'", errmesg, str); return 0; } +/* + * same as strtoul(3) but exit on failure instead of returning crap + */ +unsigned long strtoul_or_err(const char *str, const char *errmesg) +{ + unsigned long num; + char *end = NULL; + + if (str == NULL || *str == '\0') + goto err; + errno = 0; + num = strtoul(str, &end, 10); + + if (errno || str == end || (end && *end)) + goto err; + + return num; +err: + if (errno) + err(EXIT_FAILURE, "%s: '%s'", errmesg, str); + else + errx(EXIT_FAILURE, "%s: '%s'", errmesg, str); + return 0; +} /* * Converts stat->st_mode to ls(1)-like mode string. The size of "str" must |