X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Futils.c;h=08139e5e2cb23d691c92c6800cef841e2362bc57;hp=84d42f4638e53f37fc139c4b1c6d5d6b1c30b375;hb=2daf65025e0fe5c15179dc4bfb26f875e3d31a26;hpb=4b223a6755662f272f7db155ee380528728e5dd1

diff --git a/src/common/utils.c b/src/common/utils.c
index 84d42f463..08139e5e2 100644
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -41,6 +41,7 @@
 
 #include "utils.h"
 #include "defaults.h"
+#include "time.h"
 
 /*
  * Return a partial realpath(3) of the path even if the full path does not
@@ -197,7 +198,7 @@ error:
 }
 
 static
-char *expand_double_slashes_dot_and_dotdot(char *path)
+int expand_double_slashes_dot_and_dotdot(char *path)
 {
 	size_t expanded_path_len, path_len;
 	const char *curr_char, *path_last_char, *next_slash, *prev_slash;
@@ -206,7 +207,6 @@ char *expand_double_slashes_dot_and_dotdot(char *path)
 	path_last_char = &path[path_len];
 
 	if (path_len == 0) {
-		path = NULL;
 		goto error;
 	}
 
@@ -292,9 +292,9 @@ char *expand_double_slashes_dot_and_dotdot(char *path)
 	}
 
 	path[expanded_path_len] = '\0';
-
+	return 0;
 error:
-	return path;
+	return -1;
 }
 
 /*
@@ -310,9 +310,10 @@ error:
 LTTNG_HIDDEN
 char *_utils_expand_path(const char *path, bool keep_symlink)
 {
+	int ret;
 	char *absolute_path = NULL;
 	char *last_token;
-	int is_dot, is_dotdot;
+	bool is_dot, is_dotdot;
 
 	/* Safety net */
 	if (path == NULL) {
@@ -320,41 +321,51 @@ char *_utils_expand_path(const char *path, bool keep_symlink)
 	}
 
 	/* Allocate memory for the absolute_path */
-	absolute_path = zmalloc(PATH_MAX);
+	absolute_path = zmalloc(LTTNG_PATH_MAX);
 	if (absolute_path == NULL) {
 		PERROR("zmalloc expand path");
 		goto error;
 	}
 
 	if (path[0] == '/') {
-		strncpy(absolute_path, path, PATH_MAX);
+		ret = lttng_strncpy(absolute_path, path, LTTNG_PATH_MAX);
+		if (ret) {
+			ERR("Path exceeds maximal size of %i bytes", LTTNG_PATH_MAX);
+			goto error;
+		}
 	} else {
 		/*
 		 * This is a relative path. We need to get the present working
 		 * directory and start the path walk from there.
 		 */
-		char current_working_dir[PATH_MAX];
+		char current_working_dir[LTTNG_PATH_MAX];
 		char *cwd_ret;
+
 		cwd_ret = getcwd(current_working_dir, sizeof(current_working_dir));
 		if (!cwd_ret) {
-			absolute_path = NULL;
 			goto error;
 		}
 		/*
 		 * Get the number of character in the CWD and allocate an array
 		 * to can hold it and the path provided by the caller.
 		 */
-		snprintf(absolute_path, PATH_MAX, "%s/%s", current_working_dir, path);
+		ret = snprintf(absolute_path, LTTNG_PATH_MAX, "%s/%s",
+				current_working_dir, path);
+		if (ret >= LTTNG_PATH_MAX) {
+			ERR("Concatenating current working directory %s and path %s exceeds maximal size of %i bytes",
+					current_working_dir, path, LTTNG_PATH_MAX);
+			goto error;
+		}
 	}
 
 	if (keep_symlink) {
 		/* Resolve partially our path */
 		absolute_path = utils_partial_realpath(absolute_path,
-				absolute_path, PATH_MAX);
+				absolute_path, LTTNG_PATH_MAX);
 	}
 
-	absolute_path = expand_double_slashes_dot_and_dotdot(absolute_path);
-	if (!absolute_path) {
+	ret = expand_double_slashes_dot_and_dotdot(absolute_path);
+	if (ret) {
 		goto error;
 	}
 
@@ -1635,3 +1646,38 @@ int utils_show_help(int section, const char *page_name,
 end:
 	return ret;
 }
+
+LTTNG_HIDDEN
+int timespec_to_ms(struct timespec ts, unsigned long *ms)
+{
+	unsigned long res, remain_ms;
+
+	if (ts.tv_sec > ULONG_MAX / MSEC_PER_SEC) {
+		errno = EOVERFLOW;
+		return -1;	/* multiplication overflow */
+	}
+	res = ts.tv_sec * MSEC_PER_SEC;
+	remain_ms = ULONG_MAX - res;
+	if (ts.tv_nsec / NSEC_PER_MSEC > remain_ms) {
+		errno = EOVERFLOW;
+		return -1;	/* addition overflow */
+	}
+	res += ts.tv_nsec / NSEC_PER_MSEC;
+	*ms = res;
+	return 0;
+}
+
+LTTNG_HIDDEN
+struct timespec timespec_abs_diff(struct timespec t1, struct timespec t2)
+{
+	uint64_t ts1 = (uint64_t) t1.tv_sec * (uint64_t) NSEC_PER_SEC +
+			(uint64_t) t1.tv_nsec;
+	uint64_t ts2 = (uint64_t) t2.tv_sec * (uint64_t) NSEC_PER_SEC +
+			(uint64_t) t2.tv_nsec;
+	uint64_t diff = max(ts1, ts2) - min(ts1, ts2);
+	struct timespec res;
+
+	res.tv_sec = diff / (uint64_t) NSEC_PER_SEC;
+	res.tv_nsec = diff % (uint64_t) NSEC_PER_SEC;
+	return res;
+}