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authorMichael Tokarev <mjt@tls.msk.ru>2012-06-13 00:51:56 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2012-06-13 00:52:28 (GMT)
commitac42e3de90ebf4b921035893e3670da63cad882c (patch)
tree3899d08bf7ff6bf43ef657ffa6debdb0fcac2fca
parent6979325592dd421ae4b02817ac8ac9ba5f362382 (diff)
downloadbusybox-ac42e3de90ebf4b921035893e3670da63cad882c.tar.gz
busybox-ac42e3de90ebf4b921035893e3670da63cad882c.tar.bz2
ps: use separate get_uptime() and make it work on non-linux too
Create get_uptime() function in procps/ps.c, and use it rather than relying on linux-specific sysinfo() inline. Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--procps/ps.c40
1 files changed, 29 insertions, 11 deletions
diff --git a/procps/ps.c b/procps/ps.c
index 4727b21..3a5af7c 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -69,6 +69,31 @@
/* Absolute maximum on output line length */
enum { MAX_WIDTH = 2*1024 };
+#if ENABLE_FEATURE_PS_TIME || ENABLE_FEATURE_PS_LONG
+static long get_uptime(void)
+{
+#ifdef __linux__
+ struct sysinfo info;
+ if (sysinfo(&info) < 0)
+ return 0;
+ return info.uptime;
+#elif 1
+ char buf[64];
+ long uptime;
+ if (open_read_close("/proc/uptime", buf, sizeof(buf)) <= 0)
+ bb_perror_msg_and_die("can't read %s", "/proc/uptime");
+ buf[sizeof(buf)-1] = '\0';
+ sscanf(buf, "%l", &uptime);
+ return uptime;
+#else
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0)
+ return 0;
+ return ts.tv_sec;
+#endif
+}
+#endif
+
#if ENABLE_DESKTOP
#include <sys/times.h> /* for times() */
@@ -197,8 +222,6 @@ static inline unsigned get_HZ_by_waiting(void)
static unsigned get_kernel_HZ(void)
{
- //char buf[64];
- struct sysinfo info;
if (kernel_HZ)
return kernel_HZ;
@@ -208,12 +231,7 @@ static unsigned get_kernel_HZ(void)
if (kernel_HZ == (unsigned)-1)
kernel_HZ = get_HZ_by_waiting();
- //if (open_read_close("/proc/uptime", buf, sizeof(buf)) <= 0)
- // bb_perror_msg_and_die("can't read %s", "/proc/uptime");
- //buf[sizeof(buf)-1] = '\0';
- ///sscanf(buf, "%llu", &seconds_since_boot);
- sysinfo(&info);
- seconds_since_boot = info.uptime;
+ seconds_since_boot = get_uptime();
return kernel_HZ;
}
@@ -635,7 +653,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
};
#if ENABLE_FEATURE_PS_LONG
time_t now = now;
- struct sysinfo info;
+ long uptime;
#endif
int opts = 0;
/* If we support any options, parse argv */
@@ -695,7 +713,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
puts("S UID PID PPID VSZ RSS TTY STIME TIME CMD");
#if ENABLE_FEATURE_PS_LONG
now = time(NULL);
- sysinfo(&info);
+ uptime = get_uptime();
#endif
}
else {
@@ -727,7 +745,7 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
char tty[2 * sizeof(int)*3 + 2];
char *endp;
unsigned sut = (p->stime + p->utime) / 100;
- unsigned elapsed = info.uptime - (p->start_time / 100);
+ unsigned elapsed = uptime - (p->start_time / 100);
time_t start = now - elapsed;
struct tm *tm = localtime(&start);