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Refactor the new 'times' builtin; zero-pad seconds (re: 65d363fd)

Browse source 
The output format is now identical to mksh's except for
the locale-dependent radix point ('.' or ',').

src/cmd/ksh93/bltins/misc.c:
- Output format tweak: pad seconds with initial zero if < 10.
- Use "too many operands" (e_toomanyops) error msg from 3ba4900e
  if there are operands, instead of "bad syntax" (e_badsyntax).
- Consolidate repetitive calculating and printing code
  into print_times().
- Get rid of some excessive variables.

src/cmd/ksh93/tests/builtins.sh:
- Update regression tests to match the above.

src/cmd/ksh93/data/builtins.c:
- Update sh_opttimes[] version string.
This commit is contained in:
Martijn Dekker 2020-06-24 13:43:49 +02:00
parent 57ff4676eb
commit 5c677a4c6c
3 changed files with 22 additions and 43 deletions
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59
src/cmd/ksh93/bltins/misc.c
View file

@ -464,55 +464,34 @@ int b_jobs(register int n,char *argv[],Shbltin_t *context)
/*
* times command
*/
static void print_times(clock_t uticks, clock_t sticks, Shbltin_t *context)
{
int clk_tck = context->shp->gd->lim.clk_tck;
double utime = (double)uticks / clk_tck, stime = (double)sticks / clk_tck;
sfprintf(sfstdout, "%dm%05.2fs %dm%05.2fs\n",
(int)floor(utime / 60), fmod(utime, 60),
(int)floor(stime / 60), fmod(stime, 60));
}
int b_times(int argc, char *argv[], Shbltin_t *context)
{
Shell_t *shp = context->shp;
const char *cmd = argv[0];
struct tms cpu_times;
clock_t rv;
double utime, stime, utime_min, utime_sec, stime_min, stime_sec;
while (argc = optget(argv, sh_opttimes)) switch (argc)
/* No options or operands are supported, except --man, etc. */
if (argc = optget(argv, sh_opttimes)) switch (argc)
{
case ':':
errormsg(SH_DICT, 2, "%s", opt_info.arg);
break;
case '?':
errormsg(SH_DICT, ERROR_usage(2), "%s", optusage((char*)0));
default:
errormsg(SH_DICT, ERROR_usage(0), "%s", opt_info.arg);
return(2);
default:
break;
}
if (error_info.errors)
errormsg(SH_DICT, ERROR_usage(2), "%s", optusage((char*)0));
argv += opt_info.index;
if (*argv)
errormsg(SH_DICT, ERROR_exit(3), e_badsyntax);
rv = times(&cpu_times);
if (rv == (clock_t)-1)
errormsg(SH_DICT, ERROR_exit(2), "times(3) failed: errno %d: %s",
errno, strerror(errno));
/* First line: user and system times used by the shell */
utime = (double)cpu_times.tms_utime / shp->gd->lim.clk_tck;
utime_min = floor(utime / 60);
utime_sec = fmod(utime, 60);
stime = (double)cpu_times.tms_stime / shp->gd->lim.clk_tck;
stime_min = floor(stime / 60);
stime_sec = fmod(stime, 60);
sfprintf(sfstdout, "%dm%.2fs %dm%.2fs\n", (int)utime_min, utime_sec, (int)stime_min, stime_sec);
/* Second line: same for the shell's child processes */
utime = (double)cpu_times.tms_cutime / shp->gd->lim.clk_tck;
utime_min = floor(utime / 60);
utime_sec = fmod(utime, 60);
stime = (double)cpu_times.tms_cstime / shp->gd->lim.clk_tck;
stime_min = floor(stime / 60);
stime_sec = fmod(stime, 60);
sfprintf(sfstdout, "%dm%.2fs %dm%.2fs\n", (int)utime_min, utime_sec, (int)stime_min, stime_sec);
if (argv[opt_info.index])
errormsg(SH_DICT, ERROR_exit(2), e_toomanyops);
/* Get & print the times */
if (times(&cpu_times) == (clock_t)-1)
errormsg(SH_DICT, ERROR_exit(1), "times(3) failed: %s", strerror(errno));
print_times(cpu_times.tms_utime, cpu_times.tms_stime, context);
print_times(cpu_times.tms_cutime, cpu_times.tms_cstime, context);
return(0);
}

2
src/cmd/ksh93/data/builtins.c
View file

@ -1836,7 +1836,7 @@ USAGE_LICENSE
;
const char sh_opttimes[] =
"[-1c?@(#)$Id: times (ksh93) 2020-06-06 $\n]"
"[-1c?@(#)$Id: times (ksh93) 2020-06-24 $\n]"
"[+NAME?times - display CPU usage by the shell and child processes]"
"[+DESCRIPTION?\btimes\b displays the accumulated user and system CPU times, "
"one line with the times used by the shell and another with those used by "

4
src/cmd/ksh93/tests/builtins.sh
View file

@ -671,11 +671,11 @@ fi
# ======
# 'times' builtin
expect=$'0m0.0[0-9]s 0m0.0[0-9]s\n0m0.00s 0m0.00s'
expect=$'0m00.0[0-9]s 0m00.0[0-9]s\n0m00.00s 0m00.00s'
actual=$("$SHELL" -c times)
[[ $actual == $expect ]] || err_exit "times output: expected $(printf %q "$expect"), got $(printf %q "$actual"))"
expect=$'*: times: incorrect syntax'
expect=$'*: times: too many operands'
actual=$(set +x; eval 'times Extra Args' 2>&1)
[[ $actual == $expect ]] || err_exit "times with args: expected $(printf %q "$expect"), got $(printf %q "$actual"))"