common: FreeBSD+kFreeBSD: Implement get_process_name (same as in Linux)

Signed-off-by: Mathieu Parent <math.parent@gmail.com>

(This used to be ctdb commit 258092aaf6b7a9bdc14f0fb35e8bd7f7dc742b3f)

2 files changed, 30 insertions, 3 deletions

diff --git a/ctdb/common/system_freebsd.c b/ctdb/common/system_freebsd.c
index 2fb3f45ebd..1ce9d3d16d 100644
--- a/ctdb/common/system_freebsd.c
+++ b/ctdb/common/system_freebsd.c
@@ -372,7 +372,21 @@ int ctdb_get_peer_pid(const int fd, pid_t *peer_pid)
 
 char *ctdb_get_process_name(pid_t pid)
 {
-	/* FIXME FreeBSD: get_process_name not implemented */
+	char path[32];
+	char buf[PATH_MAX];
+	char *ptr;
+	int n;
+
+	snprintf(path, sizeof(path), "/proc/%d/exe", pid);
+	n = readlink(path, buf, sizeof(buf));
+	if (n < 0) {
+		return NULL;
+	}
+
+	/* Remove any extra fields */
+	buf[n] = '\0';
+	ptr = strtok(buf, " ");
+	return strdup(ptr);
 	return NULL;
 }
 
diff --git a/ctdb/common/system_kfreebsd.c b/ctdb/common/system_kfreebsd.c
index 85442ed28d..103c1e0692 100644
--- a/ctdb/common/system_kfreebsd.c
+++ b/ctdb/common/system_kfreebsd.c
@@ -365,8 +365,21 @@ int ctdb_get_peer_pid(const int fd, pid_t *peer_pid)
 
 char *ctdb_get_process_name(pid_t pid)
 {
-	/* FIXME kFreeBSD: get_process_name not implemented */
-	return NULL;
+	char path[32];
+	char buf[PATH_MAX];
+	char *ptr;
+	int n;
+
+	snprintf(path, sizeof(path), "/proc/%d/exe", pid);
+	n = readlink(path, buf, sizeof(buf));
+	if (n < 0) {
+		return NULL;
+	}
+
+	/* Remove any extra fields */
+	buf[n] = '\0';
+	ptr = strtok(buf, " ");
+	return strdup(ptr);
 }
 
 bool ctdb_get_lock_info(pid_t req_pid, struct ctdb_lock_info *lock_info)