refactor strnum

Makefile

@@ -9,6 +9,7 @@ LIB = \
 	util/eprintf.o \
 	util/putword.o \
 	util/recurse.o \
+	util/strnum.o  \
 
 SRC = \
 	basename.c \

date.c

@@ -9,7 +9,7 @@ int
 main(int argc, char *argv[])
 {
 	char buf[BUFSIZ], c;
-	char *end, *fmt = "%c";
+	char *fmt = "%c";
 	struct tm *now = NULL;
 	time_t t;
 
@@ -17,9 +17,7 @@ main(int argc, char *argv[])
 	while((c = getopt(argc, argv, "d:")) != -1)
 		switch(c) {
 		case 'd':
-			t = strtol(optarg, &end, 0);
-			if(*end != '\0')
-				eprintf("%s: not a number\n", optarg);
+			t = strnum(optarg, 0);
 			break;
 		default:
 			exit(EXIT_FAILURE);

fold.c

@@ -16,7 +16,7 @@ static bool sflag = false;
 int
 main(int argc, char *argv[])
 {
-	char c, *end;
+	char c;
 	long width = 80;
 	FILE *fp;
 
@@ -29,9 +29,7 @@ main(int argc, char *argv[])
 			sflag = true;
 			break;
 		case 'w':
-			width = strtol(optarg, &end, 0);
-			if(*end != '\0')
-				eprintf("%s: not a number\n", optarg);
+			width = strnum(optarg, 0);
 			break;
 		default:
 			exit(EXIT_FAILURE);

head.c

@@ -10,16 +10,14 @@ static void head(FILE *, const char *, long);
 int
 main(int argc, char *argv[])
 {
-	char *end, c;
+	char c;
 	long n = 10;
 	FILE *fp;
 
 	while((c = getopt(argc, argv, "n:")) != -1)
 		switch(c) {
 		case 'n':
-			n = strtol(optarg, &end, 0);
-			if(*end != '\0')
-				eprintf("%s: not a number\n", optarg);
+			n = strnum(optarg, 0);
 			break;
 		default:
 			exit(EXIT_FAILURE);

kill.c

@@ -49,26 +49,18 @@ main(int argc, char *argv[])
 			exit(EXIT_FAILURE);
 		}
 	if(lflag) {
-		if(optind == argc-1) {
-			sig = strtol(argv[optind], &end, 0);
-			if(*end != '\0')
-				eprintf("%s: not a number\n", argv[optind]);
-		}
-		else if(optind == argc)
-			sig = 0;
-		else
+		if(optind < argc-1)
 			eprintf("usage: %s [-s signal] [pid...]\n"
 			        "       %s -l [signum]\n", argv[0], argv[0]);
 
+		sig = (optind == argc) ? 0 : strnum(argv[optind], 0);
 		for(i = 0; i < LEN(sigs); i++)
 			if(sigs[i].sig == sig || sig == 0)
 				putword(sigs[i].name);
 		putchar('\n');
 	}
 	else for(; optind < argc; optind++) {
-		pid = strtol(argv[optind], &end, 0);
-		if(*end != '\0')
-			eprintf("%s: not a number\n", argv[optind]);
+		pid = strnum(argv[optind], 0);
 		if(kill(pid, sig) == -1)
 			eprintf("kill %d:", pid);
 	}

nl.c

@@ -17,7 +17,7 @@ static regex_t preg;
 int
 main(int argc, char *argv[])
 {
-	char c, *end;
+	char c;
 	FILE *fp;
 
 	while((c = getopt(argc, argv, "b:i:s:")) != -1)
@@ -30,9 +30,7 @@ main(int argc, char *argv[])
 				eprintf("usage: %s [-b mode] [-i increment] [-s separator] [file...]\n", argv[0]);
 			break;
 		case 'i':
-			incr = strtol(optarg, &end, 0);
-			if(*end != '\0')
-				eprintf("%s: not a number\n", optarg);
+			incr = strnum(optarg, 0);
 			break;
 		case 's':
 			sep = optarg;

sleep.c

@@ -6,7 +6,6 @@
 int
 main(int argc, char *argv[])
 {
-	char *end;
 	unsigned int seconds;
 
 	if(getopt(argc, argv, "") != -1)
@@ -14,9 +13,7 @@ main(int argc, char *argv[])
 	if(optind != argc-1)
 		eprintf("usage: %s seconds\n", argv[0]);
 
-	seconds = strtol(argv[optind], &end, 0);
-	if(*end != '\0')
-		eprintf("%s: not a number\n", argv[optind]);
+	seconds = strnum(argv[optind], 0);
 	while((seconds = sleep(seconds)) > 0)
 		;
 	return EXIT_SUCCESS;

tail.c

@@ -12,7 +12,7 @@ static void taketail(FILE *, const char *, long);
 int
 main(int argc, char *argv[])
 {
-	char *end, c;
+	char c;
 	long n = 10;
 	FILE *fp;
 	void (*tail)(FILE *, const char *, long) = taketail;
@@ -20,9 +20,7 @@ main(int argc, char *argv[])
 	while((c = getopt(argc, argv, "n:")) != -1)
 		switch(c) {
 		case 'n':
-			n = abs(strtol(optarg, &end, 0));
-			if(*end != '\0')
-				eprintf("%s: not a number\n", optarg);
+			n = abs(strnum(optarg, 0));
 			if(optarg[0] == '+')
 				tail = dropinit;
 			break;

touch.c

@@ -17,7 +17,7 @@ static time_t t;
 int
 main(int argc, char *argv[])
 {
-	char *end, c;
+	char c;
 
 	t = time(NULL);
 	while((c = getopt(argc, argv, "ct:")) != -1)
@@ -26,9 +26,7 @@ main(int argc, char *argv[])
 			cflag = true;
 			break;
 		case 't':
-			t = strtol(optarg, &end, 0);
-			if(*end != '\0')
-				eprintf("%s: not a number\n", optarg);
+			t = strnum(optarg, 0);
 			break;
 		default:
 			exit(EXIT_FAILURE);

util.h

@@ -7,3 +7,4 @@ void enmasse(int, char **, int (*)(const char *, const char *));
 void eprintf(const char *, ...);
 void putword(const char *);
 void recurse(const char *, void (*)(const char *));
+long strnum(const char *, int);