Go for a multicall binary I guess

Makefile

@@ -1,11 +1,14 @@
 all:
 	$(MAKE) -C src all
+	$(MAKE) -C bin all
 	$(MAKE) -C examples all
 
 install:
 	$(MAKE) -C src install
+	$(MAKE) -C bin install
 	$(MAKE) -C examples install
 
 clean:
 	$(MAKE) -C src clean
+	$(MAKE) -C bin clean
 	$(MAKE) -C examples clean

bin/Makefile

@@ -0,0 +1,28 @@
+include ../mk/build.mk
+
+CC		= $(CROSS)cc
+
+INCLUDE_PATH	= ../include
+
+CFLAGS		+= -I$(INCLUDE_PATH)
+LDFLAGS		= -L../src -lhexagram
+STATIC		= ../src/libhexagram.a
+OBJS		= capture.o convert.o replay.o replaypcap.o main.o
+NAME		= hexagram
+
+RM		= /bin/rm
+
+all: $(NAME)
+
+install: $(NAME)
+	$(INSTALL) -d 0755 $(PREFIX)/bin
+	$(INSTALL) -c -m 0755 $(NAME) $(PREFIX)/bin
+
+$(OBJS): %.o: %.c
+	$(CC) $(CFLAGS) -c $<
+
+$(NAME): $(OBJS) $(STATIC)
+	$(CC) $(CFLAGS) -o $(NAME) $(OBJS) $(STATIC)
+
+clean:
+	$(RM) -f $(NAME) $(OBJS)

bin/app.h

@@ -0,0 +1,10 @@
+#ifndef _APP_H
+#define _APP_H
+
+typedef struct {
+    const char *name;
+    const char *arglist;
+    int (*main)(int argc, char **argv);
+} hexagram_app;
+
+#endif /* _APP_H *?

bin/capture.c

@@ -8,7 +8,13 @@
 #include <hexagram/can.h>
 #include <hexagram/capture.h>
 
-static void usage(int argc, char **argv, const char *message, ...) {
+#include "capture.h"
+
+char *hexagram_arglist_capture(void) {
+    return "canif [file.can]";
+}
+
+static int usage(int argc, char **argv, const char *message, ...) {
     if (message) {
         va_list args;
 
@@ -17,14 +23,12 @@ static void usage(int argc, char **argv, const char *message, ...) {
         va_end(args);
     }
 
-    fprintf(stderr, "usage: %s canif [file.can]\n", argv[0]);
+    fprintf(stderr, "usage: hexagram %s %s\n", argv[0], hexagram_arglist_capture());
 
     exit(1);
 }
 
-
-
-int main(int argc, char **argv) {
+int hexagram_main_capture(int argc, char **argv) {
     hexagram_can_if *can_if;
     hexagram_capture *capture;
 

bin/capture.h

@@ -0,0 +1,8 @@
+#ifndef _CAPTURE_H
+#define _CAPTURE_H
+
+char *hexagram_arglist_capture(void);
+
+int hexagram_main_capture(int argc, char **argv);
+
+#endif /* _CAPTURE_H */

bin/convert.c

@@ -5,11 +5,15 @@
 #include <inttypes.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <sys/endian.h>
+#include <endian.h>
 
 #include <hexagram/capture.h>
 #include <hexagram/pcapng.h>
 
+char *hexagram_arglist_convert(void) {
+    return "[infile] [outfile]";
+}
+
 static ssize_t handle_option(hexagram_pcapng_stream *stream,
                              uint32_t type,
                              uint16_t code,
@@ -182,7 +186,7 @@ error_io:
     return -1;
 }
 
-int main(int argc, char **argv) {
+int hexagram_main_convert(int argc, char **argv) {
     int fd;
 
     hexagram_pcapng_stream *stream;

bin/convert.h

@@ -0,0 +1,8 @@
+#ifndef _CONVERT_H
+#define _CONVERT_H
+
+char *hexagram_arglist_convert(void);
+
+int hexagram_main_convert(int argc, char **argv);
+
+#endif /* _CONVERT_H */

bin/main.c

@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "capture.h"
+#include "convert.h"
+#include "replay.h"
+#include "replaypcap.h"
+
+typedef struct {
+    const char *name;
+    char *(*arglist)(void);
+    int (*main)(int argc, char **argv);
+} hexagram_app;
+
+hexagram_app apps[] = {
+    { "capture",    hexagram_arglist_capture,    hexagram_main_capture    },
+    { "convert",    hexagram_arglist_convert,    hexagram_main_convert    },
+    { "replay",     hexagram_arglist_replay,     hexagram_main_replay     },
+    { "replaypcap", hexagram_arglist_replaypcap, hexagram_main_replaypcap },
+    { NULL, NULL, NULL }
+};
+
+static int usage(int argc, char **argv, const char *message, ...) {
+    hexagram_app *app;
+
+    if (message) {
+        va_list args;
+
+        va_start(args, message);
+        vfprintf(stderr, message, args);
+        va_end(args);
+    }
+
+    fprintf(stderr, "usage: %s [command args ...]\n", argv[0]);
+
+    for (app = apps; app->name != NULL; app++) {
+        fprintf(stderr, "       %s %s %s\n", argv[0], app->name, app->arglist());
+    }
+
+    exit(1);
+}
+
+int main(int argc, char **argv) {
+    hexagram_app *app;
+
+    if (argc < 2) {
+        return usage(argc, argv, "No command provided\n");
+    }
+
+    for (app = apps; app->name != NULL; app++) {
+        if (strcmp(argv[1], app->name) == 0) {
+            return app->main(--argc, ++argv);
+        }
+    }
+
+    return usage(argc, argv, NULL);
+}

bin/replay.c

@@ -8,6 +8,12 @@
 #include <hexagram/can.h>
 #include <hexagram/capture.h>
 
+#include "replay.h"
+
+char *hexagram_arglist_replay(void) {
+    return "canif [file.can]";
+}
+
 static void usage(int argc, char **argv, const char *message, ...) {
     if (message) {
         va_list args;
@@ -17,12 +23,12 @@ static void usage(int argc, char **argv, const char *message, ...) {
         va_end(args);
     }
 
-    fprintf(stderr, "usage: %s canif [file.can]\n", argv[0]);
+    fprintf(stderr, "usage: hexagram %s %s\n", argv[0], hexagram_arglist_replay());
 
     exit(1);
 }
 
-int main(int argc, char **argv) {
+int hexagram_main_replay(int argc, char **argv) {
     hexagram_can_if *can_if;
     hexagram_capture *capture;
 

bin/replay.h

@@ -0,0 +1,8 @@
+#ifndef _REPLAY_H
+#define _REPLAY_H
+
+char *hexagram_arglist_replay(void);
+
+int hexagram_main_replay(int argc, char **argv);
+
+#endif /* _REPLAY_H */

bin/replaypcap.c

@@ -5,8 +5,8 @@
 #include <inttypes.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <endian.h>
 #include <sys/types.h>
-#include <sys/endian.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 
@@ -16,11 +16,17 @@
 
 #include <hexagram/pcapng.h>
 
+#include "replaypcap.h"
+
 struct pcapinfo {
     int sock;
     useconds_t last_time;
 };
 
+char *hexagram_arglist_replaypcap(void) {
+    return "canif [file.pcapng]";
+}
+
 static void usage(int argc, char **argv, const char *message, ...) {
     if (message) {
         va_list args;
@@ -30,7 +36,8 @@ static void usage(int argc, char **argv, const char *message, ...) {
         va_end(args);
     }
 
-    fprintf(stderr, "usage: %s canif [file.pcapng]\n", argv[0]);
+    fprintf(stderr, "usage: hexagram %s %s\n",
+        argv[0], hexagram_arglist_replaypcap());
 
     exit(1);
 }
@@ -220,7 +227,7 @@ error_io:
     return -1;
 }
 
-int main(int argc, char **argv) {
+int hexagram_main_replaypcap(int argc, char **argv) {
     int fd;
 
     struct sockaddr_can addr;

bin/replaypcap.h

@@ -0,0 +1,8 @@
+#ifndef _REPLAYPCAP_H
+#define _REPLAYPCAP_H
+
+char *hexagram_arglist_replaypcap(void);
+
+int hexagram_main_replaypcap(int argc, char **argv);
+
+#endif /* _REPLAYPCAP_H */

examples/Makefile

@@ -8,7 +8,7 @@ CFLAGS		+= -I$(INCLUDE_PATH)
 LDFLAGS		= -L../src -lhexagram
 STATIC		= ../src/libhexagram.a
 
-EXAMPLES	= capture convert duration pcapread replay view
+EXAMPLES	= duration view
 
 RM		= /bin/rm