better error checking/reporting (bb#657)

git-svn: trunk@3273

ChangeLog

@@ -1,3 +1,7 @@
+Sat Oct  6 00:50:05 CEST 2007 (tk)
+----------------------------------
+  * clamscan, clamd: better error checking/reporting (bb#657)
+
 Sat Oct  6 00:25:17 CEST 2007 (tk)
 ----------------------------------
   * clamd: enable FixStaleSocket by default

clamd/clamd.c

@@ -279,7 +279,9 @@ int main(int argc, char **argv)
     if(!cfgopt(copt, "Foreground")->enabled) {
 	daemonize();
 	if(!debug_mode)
-	    chdir("/");
+	    if(chdir("/") == -1)
+		logg("^Can't change current working directory to root\n");
+
     } else
         foreground = 1;
 

clamdscan/client.c

@@ -204,8 +204,8 @@ static int dsstream(int sockd, const struct optstruct *opt)
 	return 2;
     }
 
-    memset(buff, 0, sizeof(buff));
     while(loopw) {
+	memset(buff, 0, sizeof(buff));
 	read(sockd, buff, sizeof(buff));
 	if((pt = strstr(buff, "PORT"))) {
 	    pt += 5;

clamscan/manager.c

@@ -107,11 +107,16 @@ static int scanstdin(const struct cl_engine *engine, const struct cl_limits *lim
 
     if(!(fs = fopen(file, "wb"))) {
 	logg("!Can't open %s for writing\n", file);
+	free(file);
 	return 63;
     }
 
     while((ret = fread(buff, 1, FILEBUFF, stdin)))
-	fwrite(buff, 1, ret, fs);
+	if(fwrite(buff, 1, ret, fs) < ret) {
+	    logg("!Can't write to %s\n", file);
+	    free(file);
+	    return 58;
+	}
 
     fclose(fs);
 
@@ -460,7 +465,10 @@ static int clamav_unpack(const char *prog, const char **args, const char *tmpdir
 		}
 	    }
 #endif
-	    chdir(tmpdir);
+	    if(chdir(tmpdir) == -1) {
+		fprintf(stderr, "ERROR: chdir(%s) failed\n", tmpdir);
+		exit(1);
+	    }
 
 	    if(printinfected) {
   	        fdevnull = open("/dev/null", O_WRONLY);

shared/misc.c

@@ -171,7 +171,11 @@ int filecopy(const char *src, const char *dest)
     }
 
     while((bytes = read(s, buffer, FILEBUFF)) > 0)
-	write(d, buffer, bytes);
+	if(write(d, buffer, bytes) < bytes) {
+	    close(s);
+	    close(d);
+	    return -1;
+	}
 
     close(s);
     /* [email protected]: check result of close for NFS file */