[PATCH 2/5] trace-cmd: Make read_file_string() non static

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

This helper function is used to read strings from a binary file locally
in trace-dump.c context. The same functionality could be useful for
other trace-cmd logics. Made the function non static and prefix it with
"trace_", so it could be used in trace-cmd application context.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 tracecmd/include/trace-local.h | 1 +
 tracecmd/trace-dump.c          | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/tracecmd/include/trace-local.h b/tracecmd/include/trace-local.h
index 8b2d4c21..109c3328 100644
--- a/tracecmd/include/trace-local.h
+++ b/tracecmd/include/trace-local.h
@@ -318,4 +318,5 @@ struct pid_addr_maps {
 int trace_debug_get_filemap(struct pid_addr_maps **file_maps, int pid);
 void trace_debug_free_filemap(struct pid_addr_maps *maps);
 
+int trace_read_file_string(int fd, char *dst, int len);
 #endif /* __TRACE_LOCAL_H */
diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c
index 5642f12a..c55e2389 100644
--- a/tracecmd/trace-dump.c
+++ b/tracecmd/trace-dump.c
@@ -49,7 +49,7 @@ enum dump_items verbosity;
 			tracecmd_plog(fmt, ##__VA_ARGS__);	\
 	} while (0)
 
-static int read_file_string(int fd, char *dst, int len)
+int trace_read_file_string(int fd, char *dst, int len)
 {
 	size_t size = 0;
 	int r;
@@ -160,7 +160,7 @@ static void dump_initial_format(int fd)
 		die("wrong tracing string: %s", buf);
 
 	/* get file version */
-	if (read_file_string(fd, buf, DUMP_SIZE))
+	if (trace_read_file_string(fd, buf, DUMP_SIZE))
 		die("no version string");
 
 	do_print(SUMMARY, "\t\t%s\t[Version]\n", buf);
@@ -260,7 +260,7 @@ static void dump_events_format(int fd)
 
 	while (systems) {
 
-		if (read_file_string(fd, buf, DUMP_SIZE))
+		if (trace_read_file_string(fd, buf, DUMP_SIZE))
 			die("cannot read the name of the $dth system", systems);
 		if (read_file_number(fd, &events, 4))
 			die("cannot read the count of the events in system %s",
-- 
2.28.0