X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Futils.c;h=a18e906d7f6b303d834482b2b00ce7f93a1fcdf5;hb=d4519fa365bd3a9ce4ea1720805a29a000fa042c;hp=1a0e47ec4ed97b1601cbc3498126a760b5e02895;hpb=b662582bf448d2fad2f5990580771733a3b33d16;p=lttng-tools.git

diff --git a/src/common/utils.c b/src/common/utils.c
index 1a0e47ec4..a18e906d7 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>
 
@@ -32,7 +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")))
+LTTNG_HIDDEN
 char *utils_expand_path(const char *path)
 {
 	const char *end_path = path;
@@ -85,7 +89,7 @@ error:
 /*
  * Create a pipe in dst.
  */
-__attribute__((visibility("hidden")))
+LTTNG_HIDDEN
 int utils_create_pipe(int *dst)
 {
 	int ret;
@@ -108,7 +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")))
+LTTNG_HIDDEN
 int utils_create_pipe_cloexec(int *dst)
 {
 	int ret, i;
@@ -137,7 +141,7 @@ error:
 /*
  * Close both read and write side of the pipe.
  */
-__attribute__((visibility("hidden")))
+LTTNG_HIDDEN
 void utils_close_pipe(int *src)
 {
 	int i, ret;
@@ -162,7 +166,7 @@ void utils_close_pipe(int *src)
 /*
  * Create a new string using two strings range.
  */
-__attribute__((visibility("hidden")))
+LTTNG_HIDDEN
 char *utils_strdupdelim(const char *begin, const char *end)
 {
 	char *str;
@@ -183,7 +187,7 @@ error:
 /*
  * Set CLOEXEC flag to the give file descriptor.
  */
-__attribute__((visibility("hidden")))
+LTTNG_HIDDEN
 int utils_set_fd_cloexec(int fd)
 {
 	int ret;
@@ -202,3 +206,98 @@ int utils_set_fd_cloexec(int fd)
 end:
 	return ret;
 }
+
+/*
+ * Create pid file to the given path and filename.
+ */
+LTTNG_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.
+ */
+LTTNG_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;
+}