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authorRickard Strandqvist <rickard_strandqvist@spectrumdigital.se>2014-07-29 16:12:19 (GMT)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-07-29 23:57:13 (GMT)
commit13f6de52b149c030b0d529a3d8d68267ed20f01c (patch)
tree1cb090f8c033e0f4fd221f0bd84bec4e65dd3fc2 /tools/power
parent97fa1c5ca680bdee2c650e3aadf2a839b92f3f0e (diff)
cpupower: bench: parse.c: Fix several minor errors
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>
Diffstat (limited to 'tools/power')
-rw-r--r--tools/power/cpupower/bench/parse.c39
1 files changed, 21 insertions, 18 deletions
diff --git a/tools/power/cpupower/bench/parse.c b/tools/power/cpupower/bench/parse.c
index 543bba1..f503fb5 100644
--- a/tools/power/cpupower/bench/parse.c
+++ b/tools/power/cpupower/bench/parse.c
@@ -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;
}

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