turbostat: Factor out common function to open file and exit on failure

Several different functions in turbostat contain the same pattern of
opening a file and exiting on failure.  Factor out a common fopen_or_die
function for that.

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 16 insertions, 15 deletions

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index f7b5d6f83d28..de634c8228b4 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1175,6 +1175,19 @@ void free_all_buffers(void)
 }
 
 /*
+ * Open a file, and exit on failure
+ */
+FILE *fopen_or_die(const char *path, const char *mode)
+{
+        FILE *filep = fopen(path, "r");
+        if (!filep) {
+                perror(path);
+                exit(1);
+        }
+        return filep;
+}
+
+/*
  * Parse a file containing a single int.
  */
 int parse_int_file(const char *fmt, ...)
@@ -1187,11 +1200,7 @@ int parse_int_file(const char *fmt, ...)
         va_start(args, fmt);
         vsnprintf(path, sizeof(path), fmt, args);
         va_end(args);
-        filep = fopen(path, "r");
-        if (!filep) {
-                perror(path);
-                exit(1);
-        }
+        filep = fopen_or_die(path, "r");
         if (fscanf(filep, "%d", &value) != 1) {
                 perror(path);
                 exit(1);
@@ -1237,11 +1246,7 @@ int get_num_ht_siblings(int cpu)
         char character;
 
         sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
-        filep = fopen(path, "r");
-        if (filep == NULL) {
-                perror(path);
-                exit(1);
-        }
+        filep = fopen_or_die(path, "r");
         /*
          * file format:
          * if a pair of number with a character between: 2 siblings (eg. 1-2, or 1,4)
@@ -1311,11 +1316,7 @@ int for_all_proc_cpus(int (func)(int))
         int cpu_num;
         int retval;
 
-        fp = fopen(proc_stat, "r");
-        if (fp == NULL) {
-                perror(proc_stat);
-                exit(1);
-        }
+        fp = fopen_or_die(proc_stat, "r");
 
         retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
         if (retval != 0) {