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libbb: introduce and use xgettimeofday(), do not truncate 64-bit time_t in shells

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function                                             old     new   delta
xgettimeofday                                          -      11     +11
get_local_var_value                                  280     281      +1
svlogd_main                                         1323    1322      -1
change_epoch                                          67      66      -1
timestamp_and_log                                    461     458      -3
hwclock_main                                         301     298      -3
fmt_time_bernstein_25                                135     132      -3
step_time                                            331     326      -5
script_main                                         1207    1202      -5
machtime                                              34      28      -6
curtime                                               61      54      -7
ts_main                                              423     415      -8
nmeter_main                                          761     751     -10
gettime1900d                                          67      46     -21
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/12 up/down: 12/-73)           Total: -61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2020-12-30 23:48:01 +01:00
parent 89a55972fd
commit 3c13da3dab
16 changed files with 46 additions and 34 deletions
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4
runit/svlogd.c
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@@ -351,7 +351,7 @@ static void fmt_time_human_30nul(char *s, char dt_delim)
struct tm *ptm;
struct timeval tv;
gettimeofday(&tv, NULL);
xgettimeofday(&tv);
ptm = gmtime_r(&tv.tv_sec, &tm);
/* ^^^ using gmtime_r() instead of gmtime() to not use static data */
sprintf(s, "%04u-%02u-%02u%c%02u:%02u:%02u.%06u000",
@@ -376,7 +376,7 @@ static void fmt_time_bernstein_25(char *s)
struct timeval tv;
unsigned sec_hi;
gettimeofday(&tv, NULL);
xgettimeofday(&tv);
sec_hi = (0x400000000000000aULL + tv.tv_sec) >> 32;
tv.tv_sec = (time_t)(0x400000000000000aULL) + tv.tv_sec;
tv.tv_usec *= 1000;