Expland `mymalloc' with malloc + error checking.

svn path=/head/; revision=80294

usr.bin/at/at.c

@@ -156,7 +156,8 @@ static char *cwdname(void)
     static size_t size = SIZE;
 
     if (ptr == NULL)
-	ptr = (char *) mymalloc(size);
+	if ((ptr = malloc(size)) == NULL)
+	    errx(EXIT_FAILURE, "virtual memory exhausted");
 
     while (1)
     {
@@ -171,7 +172,8 @@ static char *cwdname(void)
 	
 	free (ptr);
 	size += SIZE;
-	ptr = (char *) mymalloc(size);
+	if ((ptr = malloc(size)) == NULL)
+	    errx(EXIT_FAILURE, "virtual memory exhausted");
     }
 }
 
@@ -586,17 +588,6 @@ process_jobs(int argc, char **argv, int what)
     }
 } /* delete_jobs */
 
-/* Global functions */
-
-void *
-mymalloc(size_t n)
-{
-    void *p;
-    if ((p=malloc(n))==(void *)0)
-	errx(EXIT_FAILURE, "virtual memory exhausted");
-    return p;
-}
-
 int
 main(int argc, char **argv)
 {

usr.bin/at/at.h

@@ -21,11 +21,11 @@
  * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT 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.
+ *
+ * $FreeBSD$
  */
 
 extern int fcreated;
 extern char *namep;
 extern char atfile[];
 extern char atverify;
-
-void *mymalloc(size_t n);

usr.bin/at/parsetime.c

@@ -185,7 +185,8 @@ init_scanner(int argc, char **argv)
     while (argc-- > 0)
 	sc_len += strlen(*argv++);
 
-    sc_token = (char *) mymalloc(sc_len);
+    if ((sc_token = malloc(sc_len)) == NULL)
+	errx(EXIT_FAILURE, "virtual memory exhausted");
 } /* init_scanner */
 
 /*

usr.bin/at/perm.c

@@ -64,7 +64,8 @@ static int check_for_user(FILE *fp,const char *name)
     int found = 0;
 
     len = strlen(name);
-    buffer = mymalloc(len+2);
+    if ((buffer = malloc(len+2)) == NULL)
+	errx(EXIT_FAILURE, "virtual memory exhausted");
 
     while(fgets(buffer, len+2, fp) != NULL)
     {