[Nbd] [PATCH] Remove GCC warnings:

[Laurent Vivier <laurent@...823...>]

warning: ignoring return value of ‘write’
warning: ignoring return value of ‘read’
warning: format not a string literal and no format arguments
warning: ignoring return value of ‘daemon’

Signed-off-by: Laurent Vivier <laurent@...823...>
---
 nbd-client.c |   20 ++++++++++++++------
 nbd-server.c |   20 +++++++++++++-------
 2 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/nbd-client.c b/nbd-client.c
index b0631ca..9d725ca 100644
--- a/nbd-client.c
+++ b/nbd-client.c
@@ -153,17 +153,22 @@ void negotiate(int sock, u64 *rsize64, u32 *flags, char* name) {
 		*flags = ((u32)ntohs(tmp)) << 16;
 
 		/* reserved for future use*/
-		write(sock, &reserved, sizeof(reserved));
+		if (write(sock, &reserved, sizeof(reserved)) < 0)
+			err("Failed/2.1: %m");
 
 		/* Write the export name that we're after */
 		magic = ntohll(opts_magic);
-		write(sock, &magic, sizeof(magic));
+		if (write(sock, &magic, sizeof(magic)) < 0)
+			err("Failed/2.2: %m");
 		opt = ntohl(NBD_OPT_EXPORT_NAME);
-		write(sock, &opt, sizeof(opt));
+		if (write(sock, &opt, sizeof(opt)) < 0)
+			err("Failed/2.3: %m");
 		namesize = (u32)strlen(name);
 		namesize = ntohl(namesize);
-		write(sock, &namesize, sizeof(namesize));
-		write(sock, name, strlen(name));
+		if (write(sock, &namesize, sizeof(namesize)) < 0)
+			err("Failed/2.4: %m");
+		if (write(sock, name, strlen(name)) < 0)
+			err("Failed/2.4: %m");
 	} else {
 		if (magic != cliserv_magic)
 			err("Not enough cliserv_magic");
@@ -441,7 +446,10 @@ int main(int argc, char *argv[]) {
 	/* Go daemon */
 	
 #ifndef NOFORK
-	if(!nofork) daemon(0,0);
+	if(!nofork) {
+		if (daemon(0,0) < 0)
+			err("Cannot detach from terminal");
+	}
 #endif
 	do {
 #ifndef NOFORK
diff --git a/nbd-server.c b/nbd-server.c
index 2d73079..382dfd3 100644
--- a/nbd-server.c
+++ b/nbd-server.c
@@ -1265,25 +1265,31 @@ CLIENT* negotiate(int net, CLIENT *client, GArray* servers) {
 
 		if(!servers)
 			err("programmer error");
-		write(net, &smallflags, sizeof(uint16_t));
-		read(net, &reserved, sizeof(reserved));
-		read(net, &magic, sizeof(magic));
+		if (write(net, &smallflags, sizeof(uint16_t)) < 0)
+			err("Negotiation failed: %m");
+		if (read(net, &reserved, sizeof(reserved)) < 0)
+			err("Negotiation failed: %m");
+		if (read(net, &magic, sizeof(magic)) < 0)
+			err("Negotiation failed: %m");
 		magic = ntohll(magic);
 		if(magic != opts_magic) {
 			close(net);
 			return NULL;
 		}
-		read(net, &opt, sizeof(opt));
+		if (read(net, &opt, sizeof(opt)) < 0)
+			err("Negotiation failed: %m");
 		opt = ntohl(opt);
 		if(opt != NBD_OPT_EXPORT_NAME) {
 			close(net);
 			return NULL;
 		}
-		read(net, &namelen, sizeof(namelen));
+		if (read(net, &namelen, sizeof(namelen)) < 0)
+			err("Negotiation failed: %m");
 		namelen = ntohl(namelen);
 		name = malloc(namelen+1);
 		name[namelen]=0;
-		read(net, name, namelen);
+		if (read(net, name, namelen) < 0)
+			err("Negotiation failed: %m");
 		for(i=0; i<servers->len; i++) {
 			SERVER* serve = &(g_array_index(servers, SERVER, i));
 			if(!strcmp(serve->servename, name)) {
@@ -2044,7 +2050,7 @@ void glib_message_syslog_redirect(const gchar *log_domain,
       default:
         level=LOG_ERR;
     }
-    syslog(level, message);
+    syslog(level, "%s", message);
 }
 #endif
 
-- 
1.7.0.4