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author | ache <ache@FreeBSD.org> | 2001-12-25 04:10:50 +0000 |
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committer | ache <ache@FreeBSD.org> | 2001-12-25 04:10:50 +0000 |
commit | 091d3aa837daf60bd832f189e92df8ab66586197 (patch) | |
tree | f459d8eef7a900e7333840ef9c570e9ce81b1125 /lib/libc/stdlib/atol.c | |
parent | 91aada8d5feb4ccebe48ea3ab211000016c9aeaf (diff) | |
download | FreeBSD-src-091d3aa837daf60bd832f189e92df8ab66586197.zip FreeBSD-src-091d3aa837daf60bd832f189e92df8ab66586197.tar.gz |
Preserve errno.
According to C99:
"The functions atof, atoi, atol, and atoll need not
affect the value of the integer expression errno on an
error. If the value of the result cannot be represented,
the behavior is undefined."
Diffstat (limited to 'lib/libc/stdlib/atol.c')
-rw-r--r-- | lib/libc/stdlib/atol.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/libc/stdlib/atol.c b/lib/libc/stdlib/atol.c index 31bcaa6..b85b8b2 100644 --- a/lib/libc/stdlib/atol.c +++ b/lib/libc/stdlib/atol.c @@ -29,18 +29,26 @@ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. + * + * $FreeBSD$ */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)atol.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ -#include <stddef.h> +#include <errno.h> #include <stdlib.h> long atol(str) const char *str; { - return(strtol(str, (char **)NULL, 10)); + long r; + int saverr; + + saverr = errno; + r = strtol(str, (char **)NULL, 10); + errno = saverr; + return r; } |