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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>
This commit is contained in:
Josh Triplett 2013-08-20 17:20:17 -07:00 committed by Len Brown
parent 95aebc44e7
commit 57a42a34d1
1 changed files with 16 additions and 15 deletions
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31
tools/power/x86/turbostat/turbostat.c
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@ -1174,6 +1174,19 @@ void free_all_buffers(void)
outp = NULL; outp = NULL;
} }
/*
* 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. * Parse a file containing a single int.
*/ */
@ -1187,11 +1200,7 @@ int parse_int_file(const char *fmt, ...)
va_start(args, fmt); va_start(args, fmt);
vsnprintf(path, sizeof(path), fmt, args); vsnprintf(path, sizeof(path), fmt, args);
va_end(args); va_end(args);
filep = fopen(path, "r"); filep = fopen_or_die(path, "r");
if (!filep) {
perror(path);
exit(1);
}
if (fscanf(filep, "%d", &value) != 1) { if (fscanf(filep, "%d", &value) != 1) {
perror(path); perror(path);
exit(1); exit(1);
@ -1237,11 +1246,7 @@ int get_num_ht_siblings(int cpu)
char character; char character;
sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu); sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
filep = fopen(path, "r"); filep = fopen_or_die(path, "r");
if (filep == NULL) {
perror(path);
exit(1);
}
/* /*
* file format: * file format:
* if a pair of number with a character between: 2 siblings (eg. 1-2, or 1,4) * 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 cpu_num;
int retval; int retval;
fp = fopen(proc_stat, "r"); fp = fopen_or_die(proc_stat, "r");
if (fp == NULL) {
perror(proc_stat);
exit(1);
}
retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n"); retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
if (retval != 0) { if (retval != 0) {