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| author | Ben Hutchings <ben@decadent.org.uk> | 2019-03-21 04:01:03 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2019-03-21 04:02:27 +0100 |
| commit | 8173c336989c1a12290cd023969df2775b2df34d (patch) | |
| tree | 75937b51dee0c58023489cc780351383840cad1c /tools/power | |
| parent | tools/power turbostat: Also read package power on AMD F17h (Zen) (diff) | |
| download | linux-8173c336989c1a12290cd023969df2775b2df34d.tar.xz linux-8173c336989c1a12290cd023969df2775b2df34d.zip | |
tools/power turbostat: Add checks for failure of fgets() and fscanf()
Most calls to fgets() and fscanf() are followed by error checks.
Add an exit-on-error in the remaining cases.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools/power')
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index ee9aaeef662e..9817abd215b9 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -2643,7 +2643,8 @@ int get_thread_siblings(struct cpu_topology *thiscpu) filep = fopen_or_die(path, "r"); do { offset -= BITMASK_SIZE; - fscanf(filep, "%lx%c", &map, &character); + if (fscanf(filep, "%lx%c", &map, &character) != 2) + err(1, "%s: failed to parse file", path); for (shift = 0; shift < BITMASK_SIZE; shift++) { if ((map >> shift) & 0x1) { so = shift + offset; @@ -3475,14 +3476,14 @@ dump_sysfs_cstate_config(void) input = fopen(path, "r"); if (input == NULL) continue; - fgets(name_buf, sizeof(name_buf), input); + if (!fgets(name_buf, sizeof(name_buf), input)) + err(1, "%s: failed to read file", path); /* truncate "C1-HSW\n" to "C1", or truncate "C1\n" to "C1" */ sp = strchr(name_buf, '-'); if (!sp) sp = strchrnul(name_buf, '\n'); *sp = '\0'; - fclose(input); sprintf(path, "/sys/devices/system/cpu/cpu%d/cpuidle/state%d/desc", @@ -3490,7 +3491,8 @@ dump_sysfs_cstate_config(void) input = fopen(path, "r"); if (input == NULL) continue; - fgets(desc, sizeof(desc), input); + if (!fgets(desc, sizeof(desc), input)) + err(1, "%s: failed to read file", path); fprintf(outf, "cpu%d: %s: %s", base_cpu, name_buf, desc); fclose(input); @@ -3512,7 +3514,8 @@ dump_sysfs_pstate_config(void) fprintf(outf, "NSFOD %s\n", path); return; } - fgets(driver_buf, sizeof(driver_buf), input); + if (!fgets(driver_buf, sizeof(driver_buf), input)) + err(1, "%s: failed to read file", path); fclose(input); sprintf(path, "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_governor", @@ -3522,7 +3525,8 @@ dump_sysfs_pstate_config(void) fprintf(outf, "NSFOD %s\n", path); return; } - fgets(governor_buf, sizeof(governor_buf), input); + if (!fgets(governor_buf, sizeof(governor_buf), input)) + err(1, "%s: failed to read file", path); fclose(input); fprintf(outf, "cpu%d: cpufreq driver: %s", base_cpu, driver_buf); @@ -3531,7 +3535,8 @@ dump_sysfs_pstate_config(void) sprintf(path, "/sys/devices/system/cpu/cpufreq/boost"); input = fopen(path, "r"); if (input != NULL) { - fscanf(input, "%d", &turbo); + if (fscanf(input, "%d", &turbo) != 1) + err(1, "%s: failed to parse number from file", path); fprintf(outf, "cpufreq boost: %d\n", turbo); fclose(input); } @@ -3539,7 +3544,8 @@ dump_sysfs_pstate_config(void) sprintf(path, "/sys/devices/system/cpu/intel_pstate/no_turbo"); input = fopen(path, "r"); if (input != NULL) { - fscanf(input, "%d", &turbo); + if (fscanf(input, "%d", &turbo) != 1) + err(1, "%s: failed to parse number from file", path); fprintf(outf, "cpufreq intel_pstate no_turbo: %d\n", turbo); fclose(input); } @@ -5464,7 +5470,8 @@ void probe_sysfs(void) input = fopen(path, "r"); if (input == NULL) continue; - fgets(name_buf, sizeof(name_buf), input); + if (!fgets(name_buf, sizeof(name_buf), input)) + err(1, "%s: failed to read file", path); /* truncate "C1-HSW\n" to "C1", or truncate "C1\n" to "C1" */ sp = strchr(name_buf, '-'); @@ -5491,7 +5498,8 @@ void probe_sysfs(void) input = fopen(path, "r"); if (input == NULL) continue; - fgets(name_buf, sizeof(name_buf), input); + if (!fgets(name_buf, sizeof(name_buf), input)) + err(1, "%s: failed to read file", path); /* truncate "C1-HSW\n" to "C1", or truncate "C1\n" to "C1" */ sp = strchr(name_buf, '-'); if (!sp) |