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Added timezone to the CalendarSpec, parser/formatter and the timedatectl

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This commit is contained in:
Ivan Kurnosov
2017-09-17 09:42:20 +02:00
committed by Zbigniew Jędrzejewski-Szmek
parent d75b31837c
commit 48d26c0164
5 changed files with 237 additions and 69 deletions
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src/basic/time-util.c
+137 -67
View File
@@ -21,6 +21,7 @@
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/timerfd.h>
@@ -596,7 +597,7 @@ int timestamp_deserialize(const char *value, usec_t *timestamp) {
return r;
}
int parse_timestamp(const char *t, usec_t *usec) {
static int parse_timestamp_impl(const char *t, usec_t *usec, bool with_tz) {
static const struct {
const char *name;
const int nr;
@@ -617,7 +618,7 @@ int parse_timestamp(const char *t, usec_t *usec) {
{ "Sat", 6 },
};
const char *k, *utc, *tzn = NULL;
const char *k, *utc = NULL, *tzn = NULL;
struct tm tm, copy;
time_t x;
usec_t x_usec, plus = 0, minus = 0, ret;
@@ -645,84 +646,86 @@ int parse_timestamp(const char *t, usec_t *usec) {
assert(t);
assert(usec);
if (t[0] == '@')
if (t[0] == '@' && !with_tz)
return parse_sec(t + 1, usec);
ret = now(CLOCK_REALTIME);
if (streq(t, "now"))
goto finish;
if (!with_tz) {
if (streq(t, "now"))
goto finish;
else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
else if (t[0] == '+') {
r = parse_sec(t+1, &plus);
if (r < 0)
return r;
goto finish;
goto finish;
} else if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
} else if (t[0] == '-') {
r = parse_sec(t+1, &minus);
if (r < 0)
return r;
goto finish;
goto finish;
} else if ((k = endswith(t, " ago"))) {
t = strndupa(t, k - t);
} else if ((k = endswith(t, " ago"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &minus);
if (r < 0)
return r;
r = parse_sec(t, &minus);
if (r < 0)
return r;
goto finish;
goto finish;
} else if ((k = endswith(t, " left"))) {
t = strndupa(t, k - t);
} else if ((k = endswith(t, " left"))) {
t = strndupa(t, k - t);
r = parse_sec(t, &plus);
if (r < 0)
return r;
r = parse_sec(t, &plus);
if (r < 0)
return r;
goto finish;
}
/* See if the timestamp is suffixed with UTC */
utc = endswith_no_case(t, " UTC");
if (utc)
t = strndupa(t, utc - t);
else {
const char *e = NULL;
int j;
tzset();
/* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note that we only
* support the local timezones here, nothing else. Not because we wouldn't want to, but simply because
* there are no nice APIs available to cover this. By accepting the local time zone strings, we make
* sure that all timestamps written by format_timestamp() can be parsed correctly, even though we don't
* support arbitrary timezone specifications. */
for (j = 0; j <= 1; j++) {
if (isempty(tzname[j]))
continue;
e = endswith_no_case(t, tzname[j]);
if (!e)
continue;
if (e == t)
continue;
if (e[-1] != ' ')
continue;
break;
goto finish;
}
if (IN_SET(j, 0, 1)) {
/* Found one of the two timezones specified. */
t = strndupa(t, e - t - 1);
dst = j;
tzn = tzname[j];
/* See if the timestamp is suffixed with UTC */
utc = endswith_no_case(t, " UTC");
if (utc)
t = strndupa(t, utc - t);
else {
const char *e = NULL;
int j;
tzset();
/* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note that we only
* support the local timezones here, nothing else. Not because we wouldn't want to, but simply because
* there are no nice APIs available to cover this. By accepting the local time zone strings, we make
* sure that all timestamps written by format_timestamp() can be parsed correctly, even though we don't
* support arbitrary timezone specifications. */
for (j = 0; j <= 1; j++) {
if (isempty(tzname[j]))
continue;
e = endswith_no_case(t, tzname[j]);
if (!e)
continue;
if (e == t)
continue;
if (e[-1] != ' ')
continue;
break;
}
if (IN_SET(j, 0, 1)) {
/* Found one of the two timezones specified. */
t = strndupa(t, e - t - 1);
dst = j;
tzn = tzname[j];
}
}
}
@@ -732,9 +735,11 @@ int parse_timestamp(const char *t, usec_t *usec) {
if (!localtime_or_gmtime_r(&x, &tm, utc))
return -EINVAL;
tm.tm_isdst = dst;
if (tzn)
tm.tm_zone = tzn;
if (!with_tz) {
tm.tm_isdst = dst;
if (tzn)
tm.tm_zone = tzn;
}
if (streq(t, "today")) {
tm.tm_sec = tm.tm_min = tm.tm_hour = 0;
@@ -874,6 +879,71 @@ finish:
return 0;
}
typedef struct ParseTimestampResult {
usec_t usec;
int return_value;
} ParseTimestampResult;
int parse_timestamp(const char *t, usec_t *usec) {
char *last_space, *timezone = NULL;
ParseTimestampResult *shared, tmp;
int r;
pid_t pid;
last_space = strrchr(t, ' ');
if (last_space != NULL) {
if (timezone_is_valid(last_space + 1)) {
timezone = last_space + 1;
}
}
if (timezone == NULL || endswith_no_case(t, " UTC"))
return parse_timestamp_impl(t, usec, false);
t = strndupa(t, last_space - t);
shared = mmap(NULL, sizeof *shared, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
if (shared == MAP_FAILED)
return negative_errno();
pid = fork();
if (pid == -1) {
int fork_errno = errno;
(void) munmap(shared, sizeof *shared);
return -fork_errno;
}
if (pid == 0) {
if (setenv("TZ", timezone, 1) != 0) {
shared->return_value = negative_errno();
_exit(EXIT_FAILURE);
}
tzset();
shared->return_value = parse_timestamp_impl(t, &shared->usec, true);
_exit(EXIT_SUCCESS);
}
r = wait_for_terminate(pid, NULL);
if (r < 0) {
(void) munmap(shared, sizeof *shared);
return r;
}
tmp = *shared;
if (munmap(shared, sizeof *shared) != 0)
return negative_errno();
if (tmp.return_value == 0)
*usec = tmp.usec;
return tmp.return_value;
}
static char* extract_multiplier(char *p, usec_t *multiplier) {
static const struct {
const char *suffix;