X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Futils.c;h=d8cb4a60f1574a936fab23bcf3a9535b2875a136;hp=0494b23bdcd0bd356f45c0f4f8c5bf8a0f99c871;hb=2d85110833f3ffc12a62b3c13b39216d6fd769d8;hpb=a4b92340642035d1eafeb1eead0ad01f64d2007d

diff --git a/src/common/utils.c b/src/common/utils.c
index 0494b23bd..d8cb4a60f 100644
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -16,11 +16,15 @@
  */
 
 #define _GNU_SOURCE
+#include <assert.h>
 #include <ctype.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 #include <common/common.h>
 
@@ -32,6 +36,7 @@
  * /tmp/test1 does, the real path is returned. In normal time, realpath(3)
  * fails if the end point directory does not exist.
  */
+__attribute__((visibility("hidden")))
 char *utils_expand_path(const char *path)
 {
 	const char *end_path = path;
@@ -70,7 +75,7 @@ char *utils_expand_path(const char *path)
 	}
 
 	/* Add end part to expanded path */
-	strncat(expanded_path, end_path, PATH_MAX);
+	strncat(expanded_path, end_path, PATH_MAX - strlen(expanded_path) - 1);
 
 	free(cut_path);
 	return expanded_path;
@@ -84,6 +89,7 @@ error:
 /*
  * Create a pipe in dst.
  */
+__attribute__((visibility("hidden")))
 int utils_create_pipe(int *dst)
 {
 	int ret;
@@ -106,6 +112,7 @@ int utils_create_pipe(int *dst)
  * Make sure the pipe opened by this function are closed at some point. Use
  * utils_close_pipe().
  */
+__attribute__((visibility("hidden")))
 int utils_create_pipe_cloexec(int *dst)
 {
 	int ret, i;
@@ -134,6 +141,7 @@ error:
 /*
  * Close both read and write side of the pipe.
  */
+__attribute__((visibility("hidden")))
 void utils_close_pipe(int *src)
 {
 	int i, ret;
@@ -158,6 +166,7 @@ void utils_close_pipe(int *src)
 /*
  * Create a new string using two strings range.
  */
+__attribute__((visibility("hidden")))
 char *utils_strdupdelim(const char *begin, const char *end)
 {
 	char *str;
@@ -174,3 +183,121 @@ char *utils_strdupdelim(const char *begin, const char *end)
 error:
 	return str;
 }
+
+/*
+ * Set CLOEXEC flag to the give file descriptor.
+ */
+__attribute__((visibility("hidden")))
+int utils_set_fd_cloexec(int fd)
+{
+	int ret;
+
+	if (fd < 0) {
+		ret = -EINVAL;
+		goto end;
+	}
+
+	ret = fcntl(fd, F_SETFD, FD_CLOEXEC);
+	if (ret < 0) {
+		PERROR("fcntl cloexec");
+		ret = -errno;
+	}
+
+end:
+	return ret;
+}
+
+/*
+ * Create pid file to the given path and filename.
+ */
+__attribute__((visibility("hidden")))
+int utils_create_pid_file(pid_t pid, const char *filepath)
+{
+	int ret;
+	FILE *fp;
+
+	assert(filepath);
+
+	fp = fopen(filepath, "w");
+	if (fp == NULL) {
+		PERROR("open pid file %s", filepath);
+		ret = -1;
+		goto error;
+	}
+
+	ret = fprintf(fp, "%d\n", pid);
+	if (ret < 0) {
+		PERROR("fprintf pid file");
+	}
+
+	fclose(fp);
+	DBG("Pid %d written in file %s", pid, filepath);
+error:
+	return ret;
+}
+
+/*
+ * Recursively create directory using the given path and mode.
+ *
+ * On success, return 0 else a negative error code.
+ */
+__attribute__((visibility("hidden")))
+int utils_mkdir_recursive(const char *path, mode_t mode)
+{
+	char *p, tmp[PATH_MAX];
+	struct stat statbuf;
+	size_t len;
+	int ret;
+
+	assert(path);
+
+	ret = snprintf(tmp, sizeof(tmp), "%s", path);
+	if (ret < 0) {
+		PERROR("snprintf mkdir");
+		goto error;
+	}
+
+	len = ret;
+	if (tmp[len - 1] == '/') {
+		tmp[len - 1] = 0;
+	}
+
+	for (p = tmp + 1; *p; p++) {
+		if (*p == '/') {
+			*p = 0;
+			if (tmp[strlen(tmp) - 1] == '.' &&
+					tmp[strlen(tmp) - 2] == '.' &&
+					tmp[strlen(tmp) - 3] == '/') {
+				ERR("Using '/../' is not permitted in the trace path (%s)",
+						tmp);
+				ret = -1;
+				goto error;
+			}
+			ret = stat(tmp, &statbuf);
+			if (ret < 0) {
+				ret = mkdir(tmp, mode);
+				if (ret < 0) {
+					if (errno != EEXIST) {
+						PERROR("mkdir recursive");
+						ret = -errno;
+						goto error;
+					}
+				}
+			}
+			*p = '/';
+		}
+	}
+
+	ret = mkdir(tmp, mode);
+	if (ret < 0) {
+		if (errno != EEXIST) {
+			PERROR("mkdir recursive last piece");
+			ret = -errno;
+		} else {
+			ret = 0;
+		}
+	}
+
+error:
+	return ret;
+}