CCache: Fix memory/file descriptor leaks

Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com>

CCache/ccache.c

@@ -130,6 +130,7 @@ static void failed(void)
 			exit(1);
 		}
 		args_add_prefix(orig_args, p);
+		free(p);
 	}
 
 	if (ccache_verbose) {
@@ -490,7 +491,9 @@ static void find_hash(ARGS *args)
 	/* also include the hash of the compiler name - as some compilers
 	   use hard links and behave differently depending on the real name */
 	if (st.st_nlink > 1) {
-		hash_string(str_basename(args->argv[0]));
+		char *path = str_basename(args->argv[0]);
+		hash_string(path);
+		free(path);
 	}
 
 	hash_int(st.st_size);
@@ -523,6 +526,7 @@ static void find_hash(ARGS *args)
 		   input_base, tmp_string(), 
 		   i_extension);
 	x_asprintf(&path_stderr, "%s/tmp.cpp_stderr.%s", temp_dir, tmp_string());
+	free(input_base);
 
 	if (!direct_i_file) {
 		/* run cpp on the input file to obtain the .i */
@@ -781,6 +785,7 @@ static void find_compiler(int argc, char **argv)
 
 	/* support user override of the compiler */
 	if ((path=getenv("CCACHE_CC"))) {
+		free(base);
 		base = x_strdup(path);
 	}
 
@@ -791,8 +796,10 @@ static void find_compiler(int argc, char **argv)
 		stats_update(STATS_COMPILER);
 		cc_log("could not find compiler (%s)\n", base);
 		perror(base);
+		free(base);
 		exit(1);
 	}
+  	free(base);
 }
 
 
@@ -1076,6 +1083,7 @@ static void process_args(int argc, char **argv)
 				if (strlen(p) < 2) {
 					cc_log("badly formed dependency file %s\n", output_file);
 					stats_update(STATS_ARGS);
+					free(default_depfile_name);
 					failed();
 					return;
 				}
@@ -1093,6 +1101,7 @@ static void process_args(int argc, char **argv)
 			strcat(default_depfile_name, ".d");
 			args_add(stripped_args, "-MF");
 			args_add(stripped_args, default_depfile_name);
+			free(default_depfile_name);
 		}
 
 		if (!dependency_target_specified) {
@@ -1117,6 +1126,7 @@ static void process_args(int argc, char **argv)
 			exit(1);
 		}
 		args_add_prefix(stripped_args, p);
+		free(p);
 	}
 }
 
@@ -1305,6 +1315,7 @@ static void setup_uncached_err(void)
 
 	if (putenv(buf) == -1) {
 		cc_log("putenv failed\n");
+		close(uncached_fd);
 		stats_update(STATS_ERROR);
 		failed();
 	}

CCache/execute.c

@@ -267,6 +267,7 @@ char *find_executable(const char *name, const char *exclude_name)
 		}
 		free(fname);
 	}
+	free(path);
 
 	return NULL;
 #endif

CCache/stats.c

@@ -138,7 +138,10 @@ static void stats_update_size(enum stats stat, size_t size, size_t numfiles)
 
 	memset(counters, 0, sizeof(counters));
 
-	if (lock_fd(fd) != 0) return;
+	if (lock_fd(fd) != 0) {
+		close(fd);
+		return;
+  }
 
 	/* read in the old stats */
 	stats_read_fd(fd, counters);

CCache/unify.c

@@ -281,6 +281,7 @@ int unify_hash(const char *fname)
 	fd = open(fname, O_RDONLY|O_BINARY);
 	if (fd == -1 || fstat(fd, &st) != 0) {
 		cc_log("Failed to open preprocessor output %s\n", fname);
+		if (fd != -1) close(fd);
 		stats_update(STATS_PREPROCESSOR);
 		return -1;
 	}
@@ -289,12 +290,12 @@ int unify_hash(const char *fname)
            lines in preprocessor output. I have seen lines of over
            100k in length, so this is well worth it */
 	map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+	close(fd);
 	if (map == (char *)-1) {
 		cc_log("Failed to mmap %s\n", fname);
 		stats_update(STATS_PREPROCESSOR);
 		return -1;
 	}
-	close(fd);
 
 	/* pass it through the unifier */
 	unify((unsigned char *)map, st.st_size);

CCache/util.c

@@ -189,9 +189,11 @@ void copy_fd(int fd_in, int fd_out) {
 
 	while ((n = gzread(gz_in, buf, sizeof(buf))) > 0) {
 		if (write(fd_out, buf, n) != n) {
+			gzclose(gz_in);
 			fatal("Failed to copy fd");
 		}
 	}
+	gzclose(gz_in);
 }
 
 static int _copy_file(const char *src, const char *dest, int mode) {
@@ -248,9 +250,11 @@ static int _copy_file(const char *src, const char *dest, int mode) {
 	}
 
 	if (mode == COPY_TO_CACHE) {
-		gz_out = gzdopen(dup(fd_out), "wb");
+		int dup_fd_out = dup(fd_out);
+		gz_out = gzdopen(dup_fd_out, "wb");
 		if (!gz_out) {
 			gzclose(gz_in);
+			close(dup_fd_out);
 			close(fd_out);
 			free(tmp_name);
 			return -1;
@@ -459,6 +463,7 @@ int create_cachedirtag(const char *dir)
 	f = fopen(filename, "w");
 	if (!f) goto error;
 	if (fwrite(CACHEDIR_TAG, sizeof(CACHEDIR_TAG)-1, 1, f) != 1) {
+		fclose(f);
 		goto error;
 	}
 	if (fclose(f)) goto error;