Turbostat: use sizeof for the buffer sier of s*printf

[collectd.git] / src / turbostat.c

diff --git a/src/turbostat.c b/src/turbostat.c
index d602ffe..0989b05 100644 (file)
--- a/src/turbostat.c
+++ b/src/turbostat.c
@@ -270,6 +270,7 @@ static int __attribute__((warn_unused_result))
 open_msr(int cpu)
 {
        char pathname[32];
+       int fd;
 
        /* FIXME: Do we really need this, why? */
        if (cpu_migrate(cpu)) {
@@ -277,8 +278,11 @@ open_msr(int cpu)
                return -ERR_CPU_MIGRATE;
        }
 
-       ssnprintf(pathname, 32, "/dev/cpu/%d/msr", cpu);
-       return open(pathname, O_RDONLY);
+       ssnprintf(pathname, sizeof(pathname), "/dev/cpu/%d/msr", cpu);
+       fd = open(pathname, O_RDONLY);
+       if (fd < 0)
+               return -ERR_CANT_OPEN_MSR;
+       return fd;
 }
 
 static int __attribute__((warn_unused_result))
@@ -303,7 +307,7 @@ get_msr(int cpu, off_t offset, unsigned long long *msr)
 
        fd = open_msr(cpu);
        if (fd < 0)
-               return -1;
+               return fd;
        retval = read_msr(fd, offset, msr);
        close(fd);
        return retval;
@@ -446,7 +450,7 @@ get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 
        msr_fd = open_msr(cpu);
        if (msr_fd < 0)
-               return -ERR_CANT_OPEN_MSR;
+               return msr_fd;
 
 #define READ_MSR(msr, dst)                     \
 do {                                           \
@@ -636,7 +640,7 @@ get_num_ht_siblings(int cpu)
        int matches;
        char character;
 
-       ssnprintf(path, 80, "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
+       ssnprintf(path, sizeof(path), "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
        filep = fopen(path, "r");
         if (!filep) {
                 ERROR("%s: open failed", path);
@@ -810,7 +814,7 @@ submit_counters(struct thread_data *t, struct core_data *c,
 
        interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0;
 
-       snprintf(name, NAME_LEN, "cpu%02d", t->cpu_id);
+       snprintf(name, sizeof(name), "cpu%02d", t->cpu_id);
 
        if (!skip_c0)
                turbostat_submit(name, "percent", "c0", 100.0 * t->mperf/t->tsc);
@@ -828,7 +832,7 @@ submit_counters(struct thread_data *t, struct core_data *c,
        if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
                goto done;
 
-       snprintf(name, NAME_LEN, "core%02d", c->core_id);
+       snprintf(name, sizeof(name), "core%02d", c->core_id);
 
        if (do_core_cstate & (1 << 3))
                turbostat_submit(name, "percent", "c3", 100.0 * c->c3/t->tsc);
@@ -844,7 +848,7 @@ submit_counters(struct thread_data *t, struct core_data *c,
        if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
                goto done;
 
-       snprintf(name, NAME_LEN, "pkg%02d", p->package_id);
+       snprintf(name, sizeof(name), "pkg%02d", p->package_id);
 
        if (do_ptm)
                turbostat_submit(NULL, "temperature", name, p->pkg_temp_c);