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tools/power turbostat: graceful fail on garbage input

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When invald MSR's are specified on the command line,
turbostat should simply print an error and exit.

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2012-11-01 00:08:19 -04:00
parent 39300ffb9b
commit d91bb17c2a
1 changed files with 18 additions and 8 deletions
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26
tools/power/x86/turbostat/turbostat.c
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@ -206,8 +206,10 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
retval = pread(fd, msr, sizeof *msr, offset);
close(fd);
if (retval != sizeof *msr)
if (retval != sizeof *msr) {
fprintf(stderr, "%s offset 0x%zx read failed\n", pathname, offset);
return -1;
}
return 0;
}
@ -1101,7 +1103,9 @@ void turbostat_loop()
restart:
retval = for_all_cpus(get_counters, EVEN_COUNTERS);
if (retval) {
if (retval < -1) {
exit(retval);
} else if (retval == -1) {
re_initialize();
goto restart;
}
@ -1114,7 +1118,9 @@ void turbostat_loop()
}
sleep(interval_sec);
retval = for_all_cpus(get_counters, ODD_COUNTERS);
if (retval) {
if (retval < -1) {
exit(retval);
} else if (retval == -1) {
re_initialize();
goto restart;
}
@ -1126,7 +1132,9 @@ void turbostat_loop()
flush_stdout();
sleep(interval_sec);
retval = for_all_cpus(get_counters, EVEN_COUNTERS);
if (retval) {
if (retval < -1) {
exit(retval);
} else if (retval == -1) {
re_initialize();
goto restart;
}
@ -1545,8 +1553,11 @@ void turbostat_init()
int fork_it(char **argv)
{
pid_t child_pid;
int status;
for_all_cpus(get_counters, EVEN_COUNTERS);
status = for_all_cpus(get_counters, EVEN_COUNTERS);
if (status)
exit(status);
/* clear affinity side-effect of get_counters() */
sched_setaffinity(0, cpu_present_setsize, cpu_present_set);
gettimeofday(&tv_even, (struct timezone *)NULL);
@ -1556,7 +1567,6 @@ int fork_it(char **argv)
/* child */
execvp(argv[0], argv);
} else {
int status;
/* parent */
if (child_pid == -1) {
@ -1568,7 +1578,7 @@ int fork_it(char **argv)
signal(SIGQUIT, SIG_IGN);
if (waitpid(child_pid, &status, 0) == -1) {
perror("wait");
exit(1);
exit(status);
}
}
/*
@ -1585,7 +1595,7 @@ int fork_it(char **argv)
fprintf(stderr, "%.6f sec\n", tv_delta.tv_sec + tv_delta.tv_usec/1000000.0);
return 0;
return status;
}
void cmdline(int argc, char **argv)