new ARGBEGIN & usage() function

Makefile

@@ -9,13 +9,11 @@ LIB = \
 	util/cp.o        \
 	util/enmasse.o   \
 	util/eprintf.o   \
-	util/enprintf.o  \
 	util/estrtol.o   \
 	util/fnck.o      \
 	util/putword.o   \
 	util/recurse.o   \
-	util/rm.o        \
+	util/rm.o
-	util/venprintf.o
 
 SRC = \
 	basename.c \

arg.h

@@ -1,31 +0,0 @@
-extern char *argv0;
-
-#define USED(x) ((void)(x))
-
-#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
-					argv[0] && argv[0][1]\
-					&& argv[0][0] == '-';\
-					argc--, argv++) {\
-				char _argc;\
-				char **_argv;\
-				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
-					argv++;\
-					argc--;\
-					break;\
-				}\
-				for (argv[0]++, _argv = argv; argv[0][0];\
-						argv[0]++) {\
-					if (_argv != argv)\
-						break;\
-					_argc = argv[0][0];\
-					switch (_argc)
-
-#define ARGEND			}\
-				USED(_argc);\
-			}\
-			USED(argv);\
-			USED(argc);
-
-#define EARGF(x)	((argv[1] == NULL)? ((x), abort(), (char *)0) :\
-			(argc--, argv++, argv[0]))
-

basename.c

@@ -3,19 +3,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
-#include <stdbool.h>
-
-#include "arg.h"
 #include "util.h"
 
-char *argv0;
+#define USAGE()  usage("name [suffix]")
-
-void
-usage(void)
-{
-	eprintf("usage: %s name [suffix]\n", basename(argv0));
-}
 
 int
 main(int argc, char *argv[])
@@ -25,11 +15,11 @@ main(int argc, char *argv[])
 
 	ARGBEGIN {
 	default:
-		usage();
+		USAGE();
 	} ARGEND;
 
 	if(argc < 1)
-		usage();
+		USAGE();
 
 	s = basename(argv[0]);
 	if(argc == 2 && argv[1]) {
@@ -41,4 +31,3 @@ main(int argc, char *argv[])
 
 	return EXIT_SUCCESS;
 }
-

config.mk

@@ -9,8 +9,8 @@ MANPREFIX = $(PREFIX)/share/man
 #CC = musl-gcc
 LD = $(CC)
 CPPFLAGS = -D_POSIX_C_SOURCE=200112L
-CFLAGS   = -Os -ansi -Wall -pedantic $(CPPFLAGS)
+CFLAGS   = -g -ansi -Wall -pedantic $(CPPFLAGS)
-LDFLAGS  =
+LDFLAGS  = -g
 
 #CC = tcc
 #LD = $(CC)

kill.c

@@ -8,7 +8,7 @@
 #include <sys/wait.h>
 #include "util.h"
 
-#define LEN(x) (sizeof (x) / sizeof *(x))
+#define USAGE() killusage()
 
 struct {
 	const char *name;
@@ -21,6 +21,8 @@ struct {
 #undef SIG
 };
 
+static void killusage(void);
+
 int
 main(int argc, char *argv[])
 {
@@ -48,13 +50,12 @@ main(int argc, char *argv[])
 				eprintf("%s: unknown signal\n", optarg);
 			break;
 		default:
-			exit(EXIT_FAILURE);
+			USAGE();
 		}
-	if(lflag) {
 	if(optind < argc-1)
-			eprintf("usage: %s [-s signal] [pid...]\n"
+		USAGE();
-			        "       %s -l [signum]\n", argv[0], argv[0]);
 
+	if(lflag) {
 		sig = (optind == argc) ? 0 : estrtol(argv[optind], 0);
 		if(sig > 128)
 			sig = WTERMSIG(sig);
@@ -70,3 +71,10 @@ main(int argc, char *argv[])
 	}
 	return EXIT_SUCCESS;
 }
+
+void
+killusage(void)
+{
+	fprintf(stderr, "usage: %s [-s signal] [pid...]\n"
+	                "       %s -l [signum]\n", argv0, argv0);
+}

test.c

@@ -7,23 +7,23 @@
 #include <sys/stat.h>
 #include "util.h"
 
-static bool unary(const char *, const char *);
+#define USAGE() testusage()
-static void usage(void);
-static bool binary(const char *, const char *, const char *);
 
-static const char *progname;
+static bool unary(const char *, const char *);
+static bool binary(const char *, const char *, const char *);
+static void testusage(void);
 
 int
 main(int argc, char *argv[])
 {
 	bool ret = false, not = false;
 
-	progname = argv[0];
+	argv0 = argv[0];
 
 	/* [ ... ] alias */
 	if(!strcmp(argv[0], "[")) {
 		if(strcmp(argv[argc-1], "]") != 0)
-			usage();
+			USAGE();
 		argc--;
 	}
 	if(argc > 1 && !strcmp(argv[1], "!")) {
@@ -42,7 +42,7 @@ main(int argc, char *argv[])
 		ret = binary(argv[1], argv[2], argv[3]);
 		break;
 	default:
-		usage();
+		USAGE();
 	}
 	if(not)
 		ret = !ret;
@@ -56,7 +56,7 @@ unary(const char *op, const char *arg)
 	int r;
 
 	if(op[0] != '-' || op[1] == '\0' || op[2] != '\0')
-		usage();
+		USAGE();
 	switch(op[1]) {
 	case 'b': case 'c': case 'd': case 'f': case 'g':
 	case 'p': case 'S': case 's': case 'u':
@@ -99,25 +99,24 @@ unary(const char *op, const char *arg)
 	case 'z':
 		return arg[0] == '\0';
 	default:
-		usage();
+		USAGE();
 	}
 	return false; /* should not reach */
 }
 
-void
-usage(void)
-{
-	const char *ket = (progname[0] == '[') ? " ]" : "";
-
-	fprintf(stderr, "usage: %s string%s\n", progname, ket);
-	fprintf(stderr, "       %s [!] [-bcdefghLnprSstuwxz] string%s\n",  progname, ket);
-	fprintf(stderr, "       %s [!] string1 comparison-op string2%s\n", progname, ket);
-	exit(EXIT_FAILURE);
-}
-
 bool
 binary(const char *arg1, const char *op, const char *arg2)
 {
 	eprintf("not yet implemented\n");
 	return false;
 }
+
+void
+testusage(void)
+{
+	const char *ket = (*argv0 == '[') ? " ]" : "";
+
+	fprintf(stderr, "usage: %s string%s\n"
+	                "       %s [!] [-bcdefghLnprSstuwxz] string%s\n",  argv0, ket, argv0, ket);
+	exit(EXIT_FAILURE);
+}

util.h

@@ -5,6 +5,32 @@
 #define MIN(x,y)  ((x) < (y) ? (x) : (y))
 #define MAX(x,y)  ((x) > (y) ? (x) : (y))
 
+#define LEN(x) (sizeof (x) / sizeof *(x))
+
+#define ARGBEGIN \
+	{ \
+		if(!argv0) \
+			argv0 = argv[0]; \
+		for(argc--, argv++; argv[0] && argv[0][0] == '-' && argv[0][1] != '\0'; argc--, argv++) { \
+			if(argv[0][1] == '-' && argv[0][2] == '\0') { /* -- signifies end of flags */ \
+				argc--; argv++; \
+				break; \
+			} \
+			for(argv[0]++; *argv[0] != '\0'; argv[0]++) \
+				switch(*argv[0])
+
+#define ARGEND \
+		} \
+	}
+
+#define ARGC()    (*argv[0])
+#define ARGF()    (*argv[0] ? argv[0] \
+                  : argv[1] ? (argc--, *++argv) : NULL)
+#define EARGF(x)  (*argv[0] ? argv[0] \
+                  : argv[1] ? (argc--, *++argv) : ((x), abort(), NULL))
+
+extern char *argv0;
+
 char *agetcwd(void);
 void apathmax(char **, long *);
 void enmasse(int, char **, int (*)(const char *, const char *));
@@ -14,3 +40,4 @@ long estrtol(const char *, int);
 void fnck(const char *, const char *, int (*)(const char *, const char *));
 void putword(const char *);
 void recurse(const char *, void (*)(const char *));
+void usage(const char *);

util/enprintf.c

@@ -1,15 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include <stdarg.h>
-#include "../util.h"
-
-extern void venprintf(int, const char *, va_list);
-
-void
-enprintf(int status, const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	venprintf(status, fmt, ap);
-	va_end(ap);
-}

util/eprintf.c

@@ -1,9 +1,13 @@
 /* See LICENSE file for copyright and license details. */
 #include <stdarg.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include "../util.h"
 
-extern void venprintf(int, const char *, va_list);
+char *argv0;
+
+static void venprintf(int, const char *, va_list);
 
 void
 eprintf(const char *fmt, ...)
@@ -14,3 +18,34 @@ eprintf(const char *fmt, ...)
 	venprintf(EXIT_FAILURE, fmt, ap);
 	va_end(ap);
 }
+
+void
+enprintf(int status, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	venprintf(status, fmt, ap);
+	va_end(ap);
+}
+
+void
+usage(const char *s)
+{
+	fprintf(stderr, "usage: %s %s\n", argv0, s);
+	exit(EXIT_FAILURE);
+}
+
+void
+venprintf(int status, const char *fmt, va_list ap)
+{
+	/*fprintf(stderr, "%s: ", argv0);*/
+
+	vfprintf(stderr, fmt, ap);
+
+	if(fmt[0] && fmt[strlen(fmt)-1] == ':') {
+		fputc(' ', stderr);
+		perror(NULL);
+	}
+	exit(status);
+}

util/venprintf.c

@@ -1,18 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "../util.h"
-
-void
-venprintf(int status, const char *fmt, va_list ap)
-{
-	vfprintf(stderr, fmt, ap);
-
-	if(fmt[0] && fmt[strlen(fmt)-1] == ':') {
-		fputc(' ', stderr);
-		perror(NULL);
-	}
-	exit(status);
-}

yes.c

@@ -1,44 +1,30 @@
 /* See LICENSE file for copyright and license details. */
-#include <unistd.h>
-#include <libgen.h>
 #include <stdio.h>
 #include <stdlib.h>
-
-#include "arg.h"
 #include "util.h"
 
-char *argv0;
+#define USAGE()  usage("[string]")
-
-void
-usage(void)
-{
-	eprintf("usage: %s [string ...]\n", basename(argv0));
-}
 
 int
 main(int argc, char *argv[])
 {
-	int i;
+	char *s = "y";
 
 	ARGBEGIN {
 	default:
-		usage();
+		USAGE();
 	} ARGEND;
 
-	if (!argc) {
+	switch(argc) {
+	case 1:
+		s = argv[0];
+		/* fallthrough */
+	case 0:
 		for(;;)
-			puts("y");
+			puts(s);
+		break;
+	default:
+		USAGE();
 	}
-
+	return EXIT_FAILURE; /* should not reach */
-	for (;;) {
-		for (i = 0; i < argc; i++) {
-			fputs(argv[i], stdout);
-			if (argv[i+1] != NULL)
-				fputs(" ", stdout);
 }
-		fputs("\n", stdout);
-	}
-
-	return EXIT_SUCCESS;
-}
-