libbb: factor out common code from mpstat/iostat

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 4 insertions, 66 deletions

diff --git a/procps/iostat.c b/procps/iostat.c
index 76c5353..e8e321b 100644
--- a/procps/iostat.c
+++ b/procps/iostat.c
@@ -114,26 +114,6 @@ static void print_header(void)
 			buf, uts.machine, G.total_cpus);
 }
 
-static int get_number_of_cpus(void)
-{
-#ifdef _SC_NPROCESSORS_CONF
-	return sysconf(_SC_NPROCESSORS_CONF);
-#else
-	char buf[128];
-	int n = 0;
-	FILE *fp;
-
-	fp = xfopen_for_read("/proc/cpuinfo");
-
-	while (fgets(buf, sizeof(buf), fp))
-		if (strncmp(buf, "processor\t:", 11) == 0)
-			n++;
-
-	fclose(fp);
-	return n;
-#endif
-}
-
 static void get_localtime(struct tm *ptm)
 {
 	time_t timer;
@@ -148,12 +128,6 @@ static void print_timestamp(void)
 	printf("%s\n", buf);
 }
 
-/* Does str start with "cpu"? */
-static int starts_with_cpu(const char *str)
-{
-	return ((str[0] - 'c') | (str[1] - 'p') | (str[2] - 'u')) == 0;
-}
-
 /* Fetch CPU statistics from /proc/stat */
 static void get_cpu_statistics(struct stats_cpu *sc)
 {
@@ -509,7 +483,9 @@ int iostat_main(int argc, char **argv)
 	G.clk_tck = get_user_hz();
 
 	/* Determine number of CPUs */
-	G.total_cpus = get_number_of_cpus();
+	G.total_cpus = get_cpu_count();
+	if (G.total_cpus == 0)
+		G.total_cpus = 1;
 
 	/* Parse and process arguments */
 	/* -k and -m are mutually exclusive */
diff --git a/procps/mpstat.c b/procps/mpstat.c
index 85cbb45..b4520cb 100644
--- a/procps/mpstat.c
+++ b/procps/mpstat.c
@@ -119,12 +119,6 @@ enum {
 };
 
 
-/* Does str start with "cpu"? */
-static int starts_with_cpu(const char *str)
-{
-	return !((str[0] - 'c') | (str[1] - 'p') | (str[2] - 'u'));
-}
-
 /* Is option on? */
 static ALWAYS_INLINE int display_opt(int opt)
 {
@@ -816,38 +810,6 @@ static void print_header(struct tm *t)
 }
 
 /*
- * Get number of processors in /proc/stat
- * Return value '0' means one CPU and non SMP kernel.
- * Otherwise N means N processor(s) and SMP kernel.
- */
-static int get_cpu_nr(void)
-{
-	FILE *fp;
-	char line[256];
-	int proc_nr = -1;
-
-	fp = xfopen_for_read(PROCFS_STAT);
-	while (fgets(line, sizeof(line), fp)) {
-		if (!starts_with_cpu(line)) {
-			if (proc_nr >= 0)
-				break; /* we are past "cpuN..." lines */
-			continue;
-		}
-		if (line[3] != ' ') { /* "cpuN" */
-			int num_proc;
-			if (sscanf(line + 3, "%u", &num_proc) == 1
-			 && num_proc > proc_nr
-			) {
-				proc_nr = num_proc;
-			}
-		}
-	}
-
-	fclose(fp);
-	return proc_nr + 1;
-}
-
-/*
  * Get number of interrupts available per processor
  */
 static int get_irqcpu_nr(const char *f, int max_irqs)
@@ -910,7 +872,7 @@ int mpstat_main(int UNUSED_PARAM argc, char **argv)
 	G.interval = -1;
 
 	/* Get number of processors */
-	G.cpu_nr = get_cpu_nr();
+	G.cpu_nr = get_cpu_count();
 
 	/* Get number of clock ticks per sec */
 	G.hz = get_hz();