remove pthread_getname_np calls

This allows to preserve compatiblity with musl libc which lacks this function

api.c

@@ -28,6 +28,8 @@
 #include "libtcmu_priv.h"
 #include "be_byteshift.h"
 
+__thread int __tcmu_is_ework_thread = 0;
+
 int tcmu_cdb_get_length(uint8_t *cdb)
 {
 	uint8_t group_code = cdb[0] >> 5;

libtcmu.c

@@ -843,17 +843,13 @@ const char *tcmu_dev_get_uio_name(struct tcmu_device *dev)
 void tcmu_set_thread_name(const char *prefix, struct tcmu_device *dev)
 {
 	const char *uio = dev ? tcmu_dev_get_uio_name(dev) : NULL;
-	char cname[TCMU_THREAD_NAME_LEN];
 	char *pname;
 
-	if (pthread_getname_np(pthread_self(), cname, TCMU_THREAD_NAME_LEN))
-		return;
-
 	/*
 	 * If we are trying to set the pthread name in the
 	 * event work thread, we must ignore it.
 	 */
-	if (!strcmp(cname, "ework-thread")) {
+	if (__tcmu_is_ework_thread) {
 		tcmu_dev_warn(dev, "Do not set name for event work thread in the callback fn\n");
 		return;
 	}

libtcmu_common.h

@@ -194,6 +194,8 @@ void __tcmu_sense_set_data(uint8_t *sense_buf, uint8_t key, uint16_t asc_ascq);
  */
 void tcmu_thread_cancel(pthread_t thread);
 
+extern __thread int __tcmu_is_ework_thread;
+
 #ifdef __cplusplus
 }
 #endif

libtcmu_log.c

@@ -403,7 +403,6 @@ static int output_to_fd(int pri, const char *timestamp,
 	int fd = (intptr_t) data;
 	char *buf, *msg;
 	int count, ret, written = 0, r, pid = 0;
-	char pname[TCMU_THREAD_NAME_LEN];
 
 	if (fd == -1)
 		return -1;
@@ -412,13 +411,10 @@ static int output_to_fd(int pri, const char *timestamp,
 	if (pid <= 0)
 		return -1;
 
-	if (pthread_getname_np(pthread_self(), pname, TCMU_THREAD_NAME_LEN))
-		return -1;
-
 	/*
 	 * format: timestamp pid [loglevel] msg
 	 */
-	ret = asprintf(&msg, "%s %d:%s [%s] %s", timestamp, pid, pname,
+	ret = asprintf(&msg, "%s %d [%s] %s", timestamp, pid,
 		       loglevel_string(pri), str);
 	if (ret < 0)
 		return -1;

tcmur_work.c

@@ -41,16 +41,11 @@ struct tcmur_work *tcmur_create_work(void)
 
 static void __tcmur_flush_work(struct tcmur_work *work)
 {
-	char pname[TCMU_THREAD_NAME_LEN];
-
-	if (pthread_getname_np(pthread_self(), pname, TCMU_THREAD_NAME_LEN))
-		return;
-
 	/*
 	 * The event work thread may need to do a handler reopen
 	 * call and try to flush itself. Just ignore.
 	 */
-	if (!strcmp(pname, "ework-thread"))
+	if (__tcmu_is_ework_thread)
 		return;
 
 	/*
@@ -79,6 +74,7 @@ static void *tcmur_work_fn(void *data)
 	struct private *p = data;
 
 	tcmu_set_thread_name("ework-thread", NULL);
+	__tcmu_is_ework_thread = 1;
 
 	p->work_fn(p->data);