Change command main() functions to return void, and exit(toys.exitval) from

the toybox infrastructure instead.  Eliminates a return call from each command.

27 files changed, 48 insertions, 82 deletions

diff --git a/toys/basename.c b/toys/basename.c
index da843b86..ee5345e4 100644
--- a/toys/basename.c
+++ b/toys/basename.c
@@ -6,7 +6,7 @@
 
 #include "toys.h"
 
-int basename_main(void)
+void basename_main(void)
 {
 	char *name = basename(*toys.optargs);
 	char *suffix = toys.optargs[1];
@@ -15,5 +15,4 @@ int basename_main(void)
 		if (end>name && !strcmp(end,suffix)) *end=0;
 	}
 	puts(name);
-	return 0;
 }
diff --git a/toys/bzcat.c b/toys/bzcat.c
index 348a5939..984e4186 100644
--- a/toys/bzcat.c
+++ b/toys/bzcat.c
@@ -5,9 +5,7 @@
 
 #include "toys.h"
 
-int bzcat_main(void)
+void bzcat_main(void)
 {
 	bunzipStream(0, 1);
-
-	return 0;
 }
diff --git a/toys/catv.c b/toys/catv.c
index 74242010..e5412700 100644
--- a/toys/catv.c
+++ b/toys/catv.c
@@ -34,21 +34,19 @@ void do_catv(int fd, char *name)
 			}
 			if (c < 32) {
 				if (c == 10) {
-					if (toys.optflags & 1) putchar('$');
+					if (toys.optflags & 1) xputc('$');
 				} else if (toys.optflags & (c==9 ? 2 : 4)) {
 					printf("^%c", c+'@');
 					continue;
 				}
 			}
-			putchar(c);
+			xputc(c);
 		}
 	}
 }
 
-int catv_main(void)
+void catv_main(void)
 {
 	toys.optflags^=4;
 	loopfiles(toys.optargs, do_catv);
-
-	return toys.exitval;
 }
diff --git a/toys/count.c b/toys/count.c
index d7c05ce7..901962b2 100644
--- a/toys/count.c
+++ b/toys/count.c
@@ -5,7 +5,7 @@
 
 #include "toys.h"
 
-int count_main(void)
+void count_main(void)
 {
 	uint64_t size = 0;
 	int len;
@@ -18,5 +18,4 @@ int count_main(void)
 		fdprintf(2, "%"PRIu64" bytes\r", size);
 	}
 	fdprintf(2,"\n");
-	return 0;
 }
diff --git a/toys/df.c b/toys/df.c
index ffff6ce4..52863cc7 100644
--- a/toys/df.c
+++ b/toys/df.c
@@ -55,7 +55,7 @@ static void show_mt(struct mtab_list *mt)
 	}
 }
 
-int df_main(void)
+void df_main(void)
 {
 	struct mtab_list *mt, *mt2, *mtlist;
 
@@ -114,6 +114,4 @@ int df_main(void)
 	}
 
 	if (CFG_TOYBOX_FREE) llist_free(mtlist, NULL);
-
-	return 0;
 }
diff --git a/toys/dirname.c b/toys/dirname.c
index b33836b6..8810bec5 100644
--- a/toys/dirname.c
+++ b/toys/dirname.c
@@ -7,8 +7,7 @@
 #include "toys.h"
 #include <libgen.h>
 
-int dirname_main(void)
+void dirname_main(void)
 {
 	puts(dirname(*toys.optargs));
-	return 0;
 }
diff --git a/toys/dmesg.c b/toys/dmesg.c
index 7a150121..59343897 100644
--- a/toys/dmesg.c
+++ b/toys/dmesg.c
@@ -10,7 +10,7 @@
 
 #define TT toy.dmesg
 
-int dmesg_main(void)
+void dmesg_main(void)
 {
 	// For -n just tell kernel to which messages to keep.
 	if (toys.optflags & 2) {
@@ -30,11 +30,9 @@ int dmesg_main(void)
 		// Display data, filtering out level markers.
 		for (i=0; i<size; ) {
 			if (last=='\n' && data[i]=='<') i += 3;
-			else putchar(last = data[i++]);
+			else xputc(last = data[i++]);
 		}
-		if (last!='\n') putchar('\n');
+		if (last!='\n') xputc('\n');
 		if (CFG_TOYBOX_FREE) free(data);
 	}
-
-	return 0;
 }
diff --git a/toys/echo.c b/toys/echo.c
index d8ee08f2..be63225e 100644
--- a/toys/echo.c
+++ b/toys/echo.c
@@ -5,7 +5,7 @@
 
 #include "toys.h"
 
-int echo_main(void)
+void echo_main(void)
 {
 	int i = 0;
 	char *arg, *from = "\\abfnrtv", *to = "\\\a\b\f\n\r\t\v";
@@ -48,5 +48,4 @@ int echo_main(void)
 	if (!(toys.optflags&1)) xputc('\n');
 done:
 	xflush();
-	return 0;
 }
diff --git a/toys/false.c b/toys/false.c
index 48b9d65a..e8f585c5 100644
--- a/toys/false.c
+++ b/toys/false.c
@@ -5,7 +5,7 @@
 
 #include "toys.h"
 
-int false_main(void)
+void false_main(void)
 {
-	return 1;
+	toys.exitval = 1;
 }
diff --git a/toys/hello.c b/toys/hello.c
index 1f587723..bb344e93 100644
--- a/toys/hello.c
+++ b/toys/hello.c
@@ -5,8 +5,7 @@
 
 #include "toys.h"
 
-int hello_main(void)
+void hello_main(void)
 {
 	printf("Hello world\n");
-	return 0;
 }
diff --git a/toys/help.c b/toys/help.c
index ea70a1bf..d4849912 100644
--- a/toys/help.c
+++ b/toys/help.c
@@ -14,7 +14,7 @@ static char *help_data =
 #include "toys/toylist.h"
 ;
 
-int help_main(void)
+void help_main(void)
 {
 	struct toy_list *t = toy_find(*toys.optargs);
 	int i = t-toy_list;
@@ -29,5 +29,4 @@ int help_main(void)
 	}
 
 	fprintf(toys.exithelp ? stderr : stdout, "%s", s);
-	return 0;
 }
diff --git a/toys/mdev.c b/toys/mdev.c
index a4ddb0b7..e979ca13 100644
--- a/toys/mdev.c
+++ b/toys/mdev.c
@@ -180,17 +180,15 @@ static void find_dev(char *path)
 	closedir(dir);
 }
 
-int mdev_main(int argc, char *argv[])
+void mdev_main(int argc, char *argv[])
 {
 	if (toys.optflags) {
 		strcpy(toybuf, "/sys/block");
 		find_dev(toybuf);
 		strcpy(toybuf, "/sys/class");
 		find_dev(toybuf);
-		return 0;
+		return;
 	}
 
 	// hotplug support goes here
-
-	return 0;
 }
diff --git a/toys/mke2fs.c b/toys/mke2fs.c
index b102a2fe..5c1d8266 100644
--- a/toys/mke2fs.c
+++ b/toys/mke2fs.c
@@ -339,7 +339,7 @@ static void fill_inode(struct ext2_inode *in, struct dirtree *this)
 // The first argument is the name of the file to create.  If it already
 // exists, that size will be used.
 
-int mke2fs_main(void)
+void mke2fs_main(void)
 {
 	int i, temp;
 	off_t length;
@@ -561,8 +561,6 @@ int mke2fs_main(void)
 		// Write data blocks (TODO)
 		put_zeroes((end-start) * TT.blocksize);
 	}
-
-	return 0;
 }
 
 // Scratch pad:
diff --git a/toys/mkfifo.c b/toys/mkfifo.c
index a15c121c..a959a480 100644
--- a/toys/mkfifo.c
+++ b/toys/mkfifo.c
@@ -7,7 +7,7 @@
 
 #include "toys.h"
 
-int mkfifo_main(void)
+void mkfifo_main(void)
 {
 	char *arg;
 	int i;
@@ -24,6 +24,4 @@ int mkfifo_main(void)
 	for (i = 0; (arg = toys.optargs[i]); i++)
 		if (mkfifo(arg, mode))
 			perror_exit(arg);
-
-	return 0;
 }
diff --git a/toys/oneit.c b/toys/oneit.c
index 3ac5db4f..ed4c29ad 100644
--- a/toys/oneit.c
+++ b/toys/oneit.c
@@ -16,7 +16,7 @@
 // PID 1 then reaps zombies until the child process it spawned exits, at which
 // point it calls sync() and reboot().  I could stick a kill -1 in there.
 
-int oneit_main(void)
+void oneit_main(void)
 {
   int i;
   pid_t pid;
@@ -38,7 +38,7 @@ int oneit_main(void)
     open("/dev/tty0",O_RDWR);
   }
 
-  // Can't xexec() here because we vforked so we don't want to error_exit().
+  // Can't xexec() here, because we vforked so we don't want to error_exit().
   toy_exec(toys.optargs);
   execvp(*toys.optargs, toys.optargs);
   _exit(127);
diff --git a/toys/pwd.c b/toys/pwd.c
index a6fdd441..f5f04e83 100644
--- a/toys/pwd.c
+++ b/toys/pwd.c
@@ -5,12 +5,10 @@
 
 #include "toys.h"
 
-int pwd_main(void)
+void pwd_main(void)
 {
 	char *pwd = xgetcwd();
 
 	xprintf("%s\n", pwd);
 	if (CFG_TOYBOX_FREE) free(pwd);
-
-	return 0;
 }
diff --git a/toys/readlink.c b/toys/readlink.c
index 25dc7ba1..60a49770 100644
--- a/toys/readlink.c
+++ b/toys/readlink.c
@@ -6,15 +6,12 @@
 
 #include "toys.h"
 
-int readlink_main(void)
+void readlink_main(void)
 {
 	char *s = xreadlink(*toys.optargs);
 
 	if (s) {
 		xputs(s);
 		if (CFG_TOYBOX_FREE) free(s);
-		return 0;
-	}
-
-	return 1;
+	} else toys.exitval = 1;
 }
diff --git a/toys/sha1.c b/toys/sha1.c
index 77228afb..7c598c88 100644
--- a/toys/sha1.c
+++ b/toys/sha1.c
@@ -46,7 +46,7 @@ void printy(unsigned char *this)
 	int i;
 
 	for (i = 0; i < 20; i++) printf("%02x", this[i]);
-	putchar('\n');
+	xputc('\n');
 }
 
 /* Hash a single 512-bit block. This is the core of the algorithm. */
diff --git a/toys/sleep.c b/toys/sleep.c
index 06c4565d..1426690f 100644
--- a/toys/sleep.c
+++ b/toys/sleep.c
@@ -5,7 +5,7 @@
 
 #include "toys.h"
 
-int sleep_main(void)
+void sleep_main(void)
 {
-	return sleep(atol(*toys.optargs));
+	toys.exitval = sleep(atol(*toys.optargs));
 }
diff --git a/toys/sync.c b/toys/sync.c
index 4918dc47..dcb141d4 100644
--- a/toys/sync.c
+++ b/toys/sync.c
@@ -5,8 +5,7 @@
 
 #include "toys.h"
 
-int sync_main(void)
+void sync_main(void)
 {
 	sync();
-	return 0;
 }
diff --git a/toys/touch.c b/toys/touch.c
index a06204ac..61eb18b9 100644
--- a/toys/touch.c
+++ b/toys/touch.c
@@ -20,7 +20,7 @@
 #define TIME		0x10
 #define LENGTH		0x20
 
-int touch_main(void)
+void touch_main(void)
 {
 	char *arg;
 	int i, set_a, set_m, create;
@@ -87,6 +87,4 @@ time_error:
 error:
 			perror_exit(arg);
 	}
-
-	return 0;
 }
diff --git a/toys/toylist.h b/toys/toylist.h
index d7f30dcb..074ddbb8 100644
--- a/toys/toylist.h
+++ b/toys/toylist.h
@@ -9,7 +9,7 @@
 // file twice (with different macros) to populate toy_list[].
 
 #ifndef NEWTOY
-#define NEWTOY(name, opts, flags) int name##_main(void);
+#define NEWTOY(name, opts, flags) void name##_main(void);
 #define OLDTOY(name, oldname, opts, flags)
 
 struct df_data {
@@ -90,7 +90,7 @@ extern union toy_union {
 
 extern struct toy_list {
 	char *name;
-	int (*toy_main)(void);
+	void (*toy_main)(void);
 	char *options;
 	int flags;
 } toy_list[];
diff --git a/toys/toysh.c b/toys/toysh.c
index 18a3dce4..dbb187fa 100644
--- a/toys/toysh.c
+++ b/toys/toysh.c
@@ -133,7 +133,8 @@ static void run_pipeline(struct pipeline *line)
 		memcpy(&temp, &toys, sizeof(struct toy_context));
 		bzero(&toys, sizeof(struct toy_context));
 		toy_init(tl, cmd->argv);
-		cmd->pid = tl->toy_main();
+		tl->toy_main();
+		cmd->pid = toys.exitval;
 		free(toys.optargs);
 		memcpy(&toys, &temp, sizeof(struct toy_context));
 	} else {
@@ -184,19 +185,18 @@ static void handle(char *command)
 	}
 }
 
-int cd_main(void)
+void cd_main(void)
 {
 	char *dest = *toys.optargs ? *toys.optargs : getenv("HOME");
 	if (chdir(dest)) error_exit("chdir %s",dest);
-	return 0;
 }
 
-int exit_main(void)
+void exit_main(void)
 {
 	exit(*toys.optargs ? atoi(*toys.optargs) : 0);
 }
 
-int toysh_main(void)
+void toysh_main(void)
 {
 	FILE *f;
 
@@ -210,12 +210,12 @@ int toysh_main(void)
 		size_t cmdlen = 0;
 		for (;;) {
 			char *command = 0;
-			if (!f) putchar('$');
+			if (!f) xputc('$');
 			if (1 > getline(&command, &cmdlen, f ? : stdin)) break;
 			handle(command);
 			free(command);
 		}
 	}
 
-	return 1;
+	toys.exitval = 1;
 }
diff --git a/toys/true.c b/toys/true.c
index 49ec11bf..6e40eb14 100644
--- a/toys/true.c
+++ b/toys/true.c
@@ -5,7 +5,7 @@
 
 #include "toys.h"
 
-int true_main(void)
+void true_main(void)
 {
-	return 0;
+	return;
 }
diff --git a/toys/tty.c b/toys/tty.c
index d04e3012..3dfba9ee 100644
--- a/toys/tty.c
+++ b/toys/tty.c
@@ -6,12 +6,12 @@
 
 #include "toys.h"
 
-int tty_main(void)
+void tty_main(void)
 {
 	char *name = ttyname(0);
 	if (!toys.optflags) {
 		if (name) puts(name);
 		else puts("Not a tty");
 	}
-	return !name;
+	toys.exitval = !name;
 }
diff --git a/toys/which.c b/toys/which.c
index 546bdcca..c01f3bb3 100644
--- a/toys/which.c
+++ b/toys/which.c
@@ -52,16 +52,12 @@ static int which_in_path(char *filename)
 	return 0;
 }
 
-int which_main(void)
+void which_main(void)
 {
-	int rc = 0;
-
-	if (!*toys.optargs) rc++;
+	if (!*toys.optargs) toys.exitval++;
 	else {
 		int i;
-		for (i=0; toys.optargs[i]; i++) rc |= which_in_path(toys.optargs[i]);
+		for (i=0; toys.optargs[i]; i++)
+			toys.exitval |= which_in_path(toys.optargs[i]);
 	}
-	// if (CFG_TOYBOX_FREE) free(argv);
-
-	return rc;
 }
diff --git a/toys/yes.c b/toys/yes.c
index 6f2c6a3d..0b48929e 100644
--- a/toys/yes.c
+++ b/toys/yes.c
@@ -5,7 +5,7 @@
 
 #include "toys.h"
 
-int yes_main(void)
+void yes_main(void)
 {
 	for (;;) {
 		int i;
@@ -16,6 +16,4 @@ int yes_main(void)
 		if (!i) xputc('y');
 		xputc('\n');
 	}
-
-	return 0;
 }