Apply post-1.18.3 fixes, bump version to 1.18.41_18_4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

7 files changed, 88 insertions, 19 deletions

diff --git a/Config.in b/Config.in
index 140572e2d..5e31d20c7 100644
--- a/Config.in
+++ b/Config.in
@@ -126,7 +126,6 @@ config FEATURE_INSTALLER
 config INSTALL_NO_USR
 	bool "Don't use /usr"
 	default n
-	depends on FEATURE_INSTALLER
 	help
 	  Disable use of /usr. busybox --install and "make install"
 	  will install applets only to /bin and /sbin,
diff --git a/Makefile b/Makefile
index 656ee2c79..cb0e3e434 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 1
 PATCHLEVEL = 18
-SUBLEVEL = 3
+SUBLEVEL = 4
 EXTRAVERSION =
 NAME = Unnamed
 
diff --git a/coreutils/cksum.c b/coreutils/cksum.c
index 7a37e6add..53fb87a78 100644
--- a/coreutils/cksum.c
+++ b/coreutils/cksum.c
@@ -38,6 +38,7 @@ int cksum_main(int argc UNUSED_PARAM, char **argv)
 
 #define read_buf bb_common_bufsiz1
 		while ((bytes_read = safe_read(fd, read_buf, sizeof(read_buf))) > 0) {
+			length += bytes_read;
 			crc = crc32_block_endian1(crc, read_buf, bytes_read, crc32_table);
 		}
 		close(fd);
diff --git a/modutils/modutils-24.c b/modutils/modutils-24.c
index 2b34954c0..bd650cab5 100644
--- a/modutils/modutils-24.c
+++ b/modutils/modutils-24.c
@@ -2474,6 +2474,7 @@ new_process_module_arguments(struct obj_file *f, const char *options)
 		n = 0;
 		p = val;
 		while (*p != 0) {
+			char sv_ch;
 			char *endp;
 
 			if (++n > max)
@@ -2482,14 +2483,17 @@ new_process_module_arguments(struct obj_file *f, const char *options)
 			switch (*pinfo) {
 			case 's':
 				len = strcspn(p, ",");
+				sv_ch = p[len];
 				p[len] = 0;
 				obj_string_patch(f, sym->secidx,
 						 loc - contents, p);
 				loc += tgt_sizeof_char_p;
 				p += len;
+				*p = sv_ch;
 				break;
 			case 'c':
 				len = strcspn(p, ",");
+				sv_ch = p[len];
 				p[len] = 0;
 				if (len >= charssize)
 					bb_error_msg_and_die("string too long for %s (max %ld)", param,
@@ -2497,6 +2501,7 @@ new_process_module_arguments(struct obj_file *f, const char *options)
 				strcpy((char *) loc, p);
 				loc += charssize;
 				p += len;
+				*p = sv_ch;
 				break;
 			case 'b':
 				*loc++ = strtoul(p, &endp, 0);
diff --git a/networking/wget.c b/networking/wget.c
index 0db9b3365..afe0d3ab7 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -446,7 +446,7 @@ static FILE* prepare_ftp_session(FILE **dfpp, struct host_info *target, len_and_
 
 static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
 {
-	char buf[512];
+	char buf[4*1024]; /* made bigger to speed up local xfers */
 #if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
 # if ENABLE_FEATURE_WGET_TIMEOUT
 	unsigned second_cnt;
@@ -455,7 +455,6 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
 
 	polldata.fd = fileno(dfp);
 	polldata.events = POLLIN | POLLPRI;
-	ndelay_on(polldata.fd);
 #endif
 	progress_meter(PROGRESS_START);
 
@@ -464,6 +463,10 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
 
 	/* Loops only if chunked */
 	while (1) {
+
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+		ndelay_on(polldata.fd);
+#endif
 		while (1) {
 			int n;
 			unsigned rdsz;
@@ -493,22 +496,46 @@ static void NOINLINE retrieve_file_data(FILE *dfp, int output_fd)
 				progress_meter(PROGRESS_BUMP);
 			}
 #endif
+			/* fread internally uses read loop, which in our case
+			 * is usually exited when we get EAGAIN.
+			 * In this case, libc sets error marker on the stream.
+			 * Need to clear it before next fread to avoid possible
+			 * rare false positive ferror below. Rare because usually
+			 * fread gets more than zero bytes, and we don't fall
+			 * into if (n <= 0) ...
+			 */
+			clearerr(dfp);
+			errno = 0;
 			n = safe_fread(buf, rdsz, dfp);
+			/* man fread:
+			 * If error occurs, or EOF is reached, the return value
+			 * is a short item count (or zero).
+			 * fread does not distinguish between EOF and error.
+			 */
 			if (n <= 0) {
-				if (ferror(dfp)) {
-					/* perror will not work: ferror doesn't set errno */
-					bb_error_msg_and_die(bb_msg_read_error);
-				}
-				break;
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+				if (errno == EAGAIN) /* poll lied, there is no data? */
+					continue; /* yes */
+#endif
+				if (ferror(dfp))
+					bb_perror_msg_and_die(bb_msg_read_error);
+				break; /* EOF, not error */
 			}
+
 			xwrite(output_fd, buf, n);
 #if ENABLE_FEATURE_WGET_STATUSBAR
 			G.transferred += n;
 			progress_meter(PROGRESS_BUMP);
 #endif
-			if (G.got_clen)
+			if (G.got_clen) {
 				G.content_len -= n;
+				if (G.content_len == 0)
+					break;
+			}
 		}
+#if ENABLE_FEATURE_WGET_STATUSBAR || ENABLE_FEATURE_WGET_TIMEOUT
+		ndelay_off(polldata.fd);
+#endif
 
 		if (!G.chunked)
 			break;
@@ -706,6 +733,11 @@ int wget_main(int argc UNUSED_PARAM, char **argv)
 		fprintf(sfp, "Host: %s\r\nUser-Agent: %s\r\n",
 			target.host, user_agent);
 
+		/* Ask server to close the connection as soon as we are done
+		 * (IOW: we do not intend to send more requests)
+		 */
+		fprintf(sfp, "Connection: close\r\n");
+
 #if ENABLE_FEATURE_WGET_AUTHENTICATION
 		if (target.user) {
 			fprintf(sfp, "Proxy-Authorization: Basic %s\r\n"+6,
@@ -719,22 +751,25 @@ int wget_main(int argc UNUSED_PARAM, char **argv)
 
 		if (G.beg_range)
 			fprintf(sfp, "Range: bytes=%"OFF_FMT"u-\r\n", G.beg_range);
+
 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
 		if (extra_headers)
 			fputs(extra_headers, sfp);
 
 		if (opt & WGET_OPT_POST_DATA) {
 			char *estr = URL_escape(post_data);
-			fprintf(sfp, "Content-Type: application/x-www-form-urlencoded\r\n");
-			fprintf(sfp, "Content-Length: %u\r\n" "\r\n" "%s",
-					(int) strlen(estr), estr);
-			/*fprintf(sfp, "Connection: Keep-Alive\r\n\r\n");*/
-			/*fprintf(sfp, "%s\r\n", estr);*/
+			fprintf(sfp,
+				"Content-Type: application/x-www-form-urlencoded\r\n"
+				"Content-Length: %u\r\n"
+				"\r\n"
+				"%s",
+				(int) strlen(estr), estr
+			);
 			free(estr);
 		} else
 #endif
-		{ /* If "Connection:" is needed, document why */
-			fprintf(sfp, /* "Connection: close\r\n" */ "\r\n");
+		{
+			fprintf(sfp, "\r\n");
 		}
 
 		fflush(sfp);
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index 0c548bfc0..d292b46cc 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -256,7 +256,7 @@ search_help[] = N_(
 	"          USB$ => find all CONFIG_ symbols ending with USB\n"
 	"\n");
 
-static char buf[4096], *bufptr = buf;
+static char buf[4096*10], *bufptr = buf;
 static char input_buf[4096];
 static const char filename[] = ".config";
 static char *args[1024], **argptr = args;
diff --git a/sysklogd/klogd.c b/sysklogd/klogd.c
index 0d4c2578d..db32065fb 100644
--- a/sysklogd/klogd.c
+++ b/sysklogd/klogd.c
@@ -150,12 +150,41 @@ int klogd_main(int argc UNUSED_PARAM, char **argv)
 	 */
 	klogd_open();
 	openlog("kernel", 0, LOG_KERN);
+	/*
+	 * glibc problem: for some reason, glibc changes LOG_KERN to LOG_USER
+	 * above. The logic behind this is that standard
+	 * http://pubs.opengroup.org/onlinepubs/9699919799/functions/syslog.html
+	 * says the following about openlog and syslog:
+	 * "LOG_USER
+	 *  Messages generated by arbitrary processes.
+	 *  This is the default facility identifier if none is specified."
+	 *
+	 * I believe glibc misinterpreted this text as "if openlog's
+	 * third parameter is 0 (=LOG_KERN), treat it as LOG_USER".
+	 * Whereas it was meant to say "if *syslog* is called with facility
+	 * 0 in its 1st parameter without prior call to openlog, then perform
+	 * implicit openlog(LOG_USER)".
+	 *
+	 * As a result of this, eh, feature, standard klogd was forced
+	 * to open-code its own openlog and syslog implementation (!).
+	 *
+	 * Note that prohibiting openlog(LOG_KERN) on libc level does not
+	 * add any security: any process can open a socket to "/dev/log"
+	 * and write a string "<0>Voila, a LOG_KERN + LOG_EMERG message"
+	 *
+	 * Google code search tells me there is no widespread use of
+	 * openlog("foo", 0, 0), thus fixing glibc won't break userspace.
+	 *
+	 * The bug against glibc was filed:
+	 * bugzilla.redhat.com/show_bug.cgi?id=547000
+	 */
 
 	if (i)
 		klogd_setloglevel(i);
 
-	bb_signals(BB_FATAL_SIGS, record_signo);
 	signal(SIGHUP, SIG_IGN);
+	/* We want klogd_read to not be restarted, thus _norestart: */
+	bb_signals_recursive_norestart(BB_FATAL_SIGS, record_signo);
 
 	syslog(LOG_NOTICE, "klogd started: %s", bb_banner);