X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Futils.c;h=2f114934fd78c654a43a9b5563f6929bc7422ec6;hb=e7fe706f887aa4d753b102a610f802f7dd816655;hp=1a0e47ec4ed97b1601cbc3498126a760b5e02895;hpb=b662582bf448d2fad2f5990580771733a3b33d16;p=lttng-tools.git

diff --git a/src/common/utils.c b/src/common/utils.c
index 1a0e47ec4..2f114934f 100644
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -16,6 +16,7 @@
  */
 
 #define _GNU_SOURCE
+#include <assert.h>
 #include <ctype.h>
 #include <fcntl.h>
 #include <limits.h>
@@ -202,3 +203,32 @@ int utils_set_fd_cloexec(int fd)
 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;
+}