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cpupower: bench: parse.c: Fix several minor errors

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Resolved several minor errors in prepare_config() and made some additional improvements.
Earlier, the risk of file stream that was not closed. Misuse of strncpy, and the use of strncmp with strlen that makes it pointless.
I also check that sscanf has been successful, otherwise continue to the next line. And minimized the use of magic numbers.

This was found using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rickard Strandqvist 2014-07-29 18:12:19 +02:00 committed by Rafael J. Wysocki
parent 97fa1c5ca6
commit 13f6de52b1
1 changed files with 21 additions and 18 deletions
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39
tools/power/cpupower/bench/parse.c
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@ -158,14 +158,15 @@ struct config *prepare_default_config()
int prepare_config(const char *path, struct config *config)
{
size_t len = 0;
char *opt, *val, *line = NULL;
FILE *configfile = fopen(path, "r");
char opt[16], val[32], *line = NULL;
FILE *configfile;
if (config == NULL) {
fprintf(stderr, "error: config is NULL\n");
return 1;
}
configfile = fopen(path, "r");
if (configfile == NULL) {
perror("fopen");
fprintf(stderr, "error: unable to read configfile\n");
@ -174,52 +175,54 @@ int prepare_config(const char *path, struct config *config)
}
while (getline(&line, &len, configfile) != -1) {
if (line[0] == '#' || line[0] == ' ')
if (line[0] == '#' || line[0] == ' ' || line[0] == '\n')
continue;
sscanf(line, "%as = %as", &opt, &val);
if (sscanf(line, "%14s = %30s", opt, val) < 2)
continue;
dprintf("parsing: %s -> %s\n", opt, val);
if (strncmp("sleep", opt, strlen(opt)) == 0)
if (strcmp("sleep", opt) == 0)
sscanf(val, "%li", &config->sleep);
else if (strncmp("load", opt, strlen(opt)) == 0)
else if (strcmp("load", opt) == 0)
sscanf(val, "%li", &config->load);
else if (strncmp("load_step", opt, strlen(opt)) == 0)
else if (strcmp("load_step", opt) == 0)
sscanf(val, "%li", &config->load_step);
else if (strncmp("sleep_step", opt, strlen(opt)) == 0)
else if (strcmp("sleep_step", opt) == 0)
sscanf(val, "%li", &config->sleep_step);
else if (strncmp("cycles", opt, strlen(opt)) == 0)
else if (strcmp("cycles", opt) == 0)
sscanf(val, "%u", &config->cycles);
else if (strncmp("rounds", opt, strlen(opt)) == 0)
else if (strcmp("rounds", opt) == 0)
sscanf(val, "%u", &config->rounds);
else if (strncmp("verbose", opt, strlen(opt)) == 0)
else if (strcmp("verbose", opt) == 0)
sscanf(val, "%u", &config->verbose);
else if (strncmp("output", opt, strlen(opt)) == 0)
else if (strcmp("output", opt) == 0)
config->output = prepare_output(val);
else if (strncmp("cpu", opt, strlen(opt)) == 0)
else if (strcmp("cpu", opt) == 0)
sscanf(val, "%u", &config->cpu);
else if (strncmp("governor", opt, 14) == 0)
strncpy(config->governor, val, 14);
else if (strcmp("governor", opt) == 0) {
strncpy(config->governor, val,
sizeof(config->governor));
config->governor[sizeof(config->governor) - 1] = '\0';
}
else if (strncmp("priority", opt, strlen(opt)) == 0) {
else if (strcmp("priority", opt) == 0) {
if (string_to_prio(val) != SCHED_ERR)
config->prio = string_to_prio(val);
}
}
free(line);
free(opt);
free(val);
return 0;
}