diff options
| -rw-r--r-- | procps/ps.c | 40 |
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); |