Remove bb_ prefixes from xfuncs.c (and a few other places), consolidate

things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only
had one user), clean up lots of #includes...  General cleanup pass.  What I've
been doing for the last couple days.

And it conflicts!  I've removed httpd.c from this checkin due to somebody else
touching that file.  It builds for me.  I have to catch a bus.  (Now you know
why I'm looking forward to Mercurial.)

libbb/xfuncs.c

@@ -3,18 +3,12 @@
  * Utility routines.
  *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2006 Rob Landley
+ * Copyright (C) 2006 Denis Vlasenko
  *
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
 #include "busybox.h"
 
 #ifndef DMALLOC
@@ -59,7 +53,7 @@ void *xcalloc(size_t nmemb, size_t size)
 #endif /* DMALLOC */
 
 #ifdef L_xstrdup
-char * bb_xstrdup (const char *s)
+char * xstrdup (const char *s)
 {
 	char *t;
 
@@ -76,12 +70,12 @@ char * bb_xstrdup (const char *s)
 #endif
 
 #ifdef L_xstrndup
-char * bb_xstrndup (const char *s, int n)
+char * xstrndup (const char *s, int n)
 {
 	char *t;
 
 	if (ENABLE_DEBUG && s == NULL)
-		bb_error_msg_and_die("bb_xstrndup bug");
+		bb_error_msg_and_die("xstrndup bug");
 
 	t = xmalloc(++n);
 
@@ -90,7 +84,7 @@ char * bb_xstrndup (const char *s, int n)
 #endif
 
 #ifdef L_xfopen
-FILE *bb_xfopen(const char *path, const char *mode)
+FILE *xfopen(const char *path, const char *mode)
 {
 	FILE *fp;
 	if ((fp = fopen(path, mode)) == NULL)
@@ -100,14 +94,14 @@ FILE *bb_xfopen(const char *path, const char *mode)
 #endif
 
 #ifdef L_xopen
-int bb_xopen(const char *pathname, int flags)
+int xopen(const char *pathname, int flags)
 {
-	return bb_xopen3(pathname, flags, 0777);
+	return xopen3(pathname, flags, 0777);
 }
 #endif
 
 #ifdef L_xopen3
-int bb_xopen3(const char *pathname, int flags, int mode)
+int xopen3(const char *pathname, int flags, int mode)
 {
 	int ret;
 
@@ -175,7 +169,7 @@ unsigned char xread_char(int fd)
 #endif
 
 #ifdef L_xferror
-void bb_xferror(FILE *fp, const char *fn)
+void xferror(FILE *fp, const char *fn)
 {
 	if (ferror(fp)) {
 		bb_error_msg_and_die("%s", fn);
@@ -184,14 +178,14 @@ void bb_xferror(FILE *fp, const char *fn)
 #endif
 
 #ifdef L_xferror_stdout
-void bb_xferror_stdout(void)
+void xferror_stdout(void)
 {
-	bb_xferror(stdout, bb_msg_standard_output);
+	xferror(stdout, bb_msg_standard_output);
 }
 #endif
 
 #ifdef L_xfflush_stdout
-void bb_xfflush_stdout(void)
+void xfflush_stdout(void)
 {
 	if (fflush(stdout)) {
 		bb_perror_msg_and_die(bb_msg_standard_output);
@@ -201,7 +195,7 @@ void bb_xfflush_stdout(void)
 
 #ifdef L_spawn
 // This does a fork/exec in one call, using vfork().
-pid_t bb_spawn(char **argv)
+pid_t spawn(char **argv)
 {
 	static int failed;
 	pid_t pid;
@@ -226,9 +220,9 @@ pid_t bb_spawn(char **argv)
 #endif
 
 #ifdef L_xspawn
-pid_t bb_xspawn(char **argv)
+pid_t xspawn(char **argv)
 {
-	pid_t pid = bb_spawn(argv);
+	pid_t pid = spawn(argv);
 	if (pid < 0) bb_perror_msg_and_die("%s", *argv);
 	return pid;
 }
@@ -347,3 +341,107 @@ off_t fdlength(int fd)
 	return pos + 1;
 }
 #endif
+
+#ifdef L_xasprintf
+char *xasprintf(const char *format, ...)
+{
+	va_list p;
+	int r;
+	char *string_ptr;
+
+#if 1
+	// GNU extension
+	va_start(p, format);
+	r = vasprintf(&string_ptr, format, p);
+	va_end(p);
+#else
+	// Bloat for systems that haven't got the GNU extension.
+	va_start(p, format);
+	r = vsnprintf(NULL, 0, format, p);
+	va_end(p);
+	string_ptr = xmalloc(r+1);
+	va_start(p, format);
+	r = vsnprintf(string_ptr, r+1, format, p);
+	va_end(p);
+#endif
+
+	if (r < 0) bb_perror_msg_and_die("xasprintf");
+	return string_ptr;
+}
+#endif
+
+#ifdef L_xprint_and_close_file
+void xprint_and_close_file(FILE *file)
+{
+	// copyfd outputs error messages for us.
+	if (bb_copyfd_eof(fileno(file), 1) == -1) exit(bb_default_error_retval);
+
+	fclose(file);
+}
+#endif
+
+#ifdef L_xchdir
+void xchdir(const char *path)
+{
+	if (chdir(path))
+		bb_perror_msg_and_die("chdir(%s)", path);
+}
+#endif
+
+#ifdef L_warn_opendir
+DIR *warn_opendir(const char *path)
+{
+	DIR *dp;
+
+	if ((dp = opendir(path)) == NULL) {
+		bb_perror_msg("unable to open `%s'", path);
+		return NULL;
+	}
+	return dp;
+}
+#endif
+
+#ifdef L_xopendir
+DIR *xopendir(const char *path)
+{
+	DIR *dp;
+
+	if ((dp = opendir(path)) == NULL)
+		bb_perror_msg_and_die("unable to open `%s'", path);
+	return dp;
+}
+#endif
+
+#ifdef L_xdaemon
+#ifndef BB_NOMMU
+void xdaemon(int nochdir, int noclose)
+{
+	    if (daemon(nochdir, noclose)) bb_perror_msg_and_die("daemon");
+}
+#endif
+#endif
+
+#ifdef L_xbind
+void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen)
+{
+	if (bind(sockfd, my_addr, addrlen)) bb_perror_msg_and_die("bind");
+}
+#endif
+
+#ifdef L_xsocket
+int xsocket(int domain, int type, int protocol)
+{
+	int r = socket(domain, type, protocol);
+
+	if (r < 0) bb_perror_msg_and_die("socket");
+
+	return r;
+}
+#endif
+
+#ifdef L_xlisten
+void xlisten(int s, int backlog)
+{
+	if (listen(s, backlog)) bb_perror_msg_and_die("listen");
+}
+#endif