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ps: use separate get_uptime() and make it work on non-linux too

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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>
This commit is contained in:
Michael Tokarev 2012-06-13 02:51:56 +02:00 committed by Denys Vlasenko
parent 6979325592
commit ac42e3de90
1 changed files with 29 additions and 11 deletions
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40
procps/ps.c
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@ -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);