X-Git-Url: https://gapil.gnulinux.it/gitweb/?p=gapil.git;a=blobdiff_plain;f=sources%2FErrCode.c;h=b59da7fcec9427d5b0cbbaf9ed488c0b3027ffd9;hp=b683d641099ec6f32e1bca89e86bf0286a233db7;hb=86e903a44e57cf2d3fe122693fae4319fc8ba89e;hpb=74b2dc2662eb6e3c6e64b4b284eeb77afab48c60

diff --git a/sources/ErrCode.c b/sources/ErrCode.c
index b683d64..b59da7f 100644
--- a/sources/ErrCode.c
+++ b/sources/ErrCode.c
@@ -26,7 +26,7 @@
  *
  * Usage: errcode -h give all info's
  *
- * $Id: ErrCode.c,v 1.3 2001/09/12 18:07:32 piccardi Exp $ 
+ * $Id: ErrCode.c,v 1.5 2002/12/03 11:06:05 piccardi Exp $ 
  *
  ****************************************************************/
 /* 
@@ -37,6 +37,7 @@
 #include <unistd.h>      /* unix standard library */
 #include <stdio.h>	 /* standard I/O library */
 #include <string.h>      /* string functions */
+#include <limits.h>      /* system limits values */
 
 /* Help printing routine */
 void usage(void);
@@ -217,7 +218,17 @@ int main(int argc, char *argv[])
     if (optind == argc) {
 	usage();
     }
+    /* convert string to number */
     err = strtol(argv[optind], NULL, 10);
+    /* testing error condition on conversion */
+    if (err==LONG_MIN) {
+	perror("Underflow on error code");
+	return 1;
+    } else if (err==LONG_MIN) {
+	perror("Overflow on error code");
+	return 1;
+    }
+    /* conversion is fine */
     if (message) {
 	printf("Error message for %d is %s\n", err, strerror(err));
     }