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ps: improve TIME column for large times: showing "14453:50" is not good

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function                                             old     new   delta
format_time                                            -     110    +110
func_time                                             59      50      -9
func_etime                                            67      53     -14
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 110/-23)            Total: 87 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-08-10 15:01:43 +02:00
parent 9a6f62fd51
commit 9c7c63b5c2
1 changed files with 36 additions and 9 deletions
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45
procps/ps.c
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@ -308,28 +308,55 @@ static void func_nice(char *buf, int size, const procps_status_t *ps)
#endif
#if ENABLE_FEATURE_PS_TIME
static void format_time(char *buf, int size, unsigned long tt)
{
unsigned ff;
/* Used to show "14453:50" if tt is large. Ugly.
* procps-ng 3.3.10 uses "[[dd-]hh:]mm:ss" format.
* TODO: switch to that?
*/
/* Formatting for 5-char TIME column.
* NB: "size" is not always 5: ELAPSED is wider (7),
* not taking advantage of that (yet?).
*/
ff = tt % 60;
tt /= 60;
if (tt < 60) {
snprintf(buf, size+1, "%2u:%02u", (unsigned)tt, ff);
return;
}
ff = tt % 60;
tt /= 60;
if (tt < 24) {
snprintf(buf, size+1, "%2uh%02u", (unsigned)tt, ff);
return;
}
ff = tt % 24;
tt /= 24;
if (tt < 100) {
snprintf(buf, size+1, "%2ud%02u", (unsigned)tt, ff);
return;
}
snprintf(buf, size+1, "%4lud", tt);
}
static void func_etime(char *buf, int size, const procps_status_t *ps)
{
/* elapsed time [[dd-]hh:]mm:ss; here only mm:ss */
unsigned long mm;
unsigned ss;
mm = ps->start_time / get_kernel_HZ();
mm = G.seconds_since_boot - mm;
ss = mm % 60;
mm /= 60;
snprintf(buf, size+1, "%3lu:%02u", mm, ss);
format_time(buf, size, mm);
}
static void func_time(char *buf, int size, const procps_status_t *ps)
{
/* cumulative time [[dd-]hh:]mm:ss; here only mm:ss */
unsigned long mm;
unsigned ss;
mm = (ps->utime + ps->stime) / get_kernel_HZ();
ss = mm % 60;
mm /= 60;
snprintf(buf, size+1, "%3lu:%02u", mm, ss);
format_time(buf, size, mm);
}
#endif
@ -365,7 +392,7 @@ static const ps_out_t out_spec[] = {
// { 5 , "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
#endif
#if ENABLE_FEATURE_PS_TIME
{ 6 , "time" ,"TIME" ,func_time ,PSSCAN_STIME | PSSCAN_UTIME },
{ 5 , "time" ,"TIME" ,func_time ,PSSCAN_STIME | PSSCAN_UTIME },
#endif
{ 6 , "tty" ,"TT" ,func_tty ,PSSCAN_TTY },
{ 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },