/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <time.h> #include <string.h> #include "util.h" #include "time-util.h" usec_t now(clockid_t clock_id) { struct timespec ts; assert_se(clock_gettime(clock_id, &ts) == 0); return timespec_load(&ts); } dual_timestamp* dual_timestamp_get(dual_timestamp *ts) { assert(ts); ts->realtime = now(CLOCK_REALTIME); ts->monotonic = now(CLOCK_MONOTONIC); return ts; } dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) { int64_t delta; assert(ts); if (u == (usec_t) -1) { ts->realtime = ts->monotonic = (usec_t) -1; return ts; } ts->realtime = u; if (u == 0) ts->monotonic = 0; else { delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u; ts->monotonic = now(CLOCK_MONOTONIC); if ((int64_t) ts->monotonic > delta) ts->monotonic -= delta; else ts->monotonic = 0; } return ts; } dual_timestamp* dual_timestamp_from_monotonic(dual_timestamp *ts, usec_t u) { int64_t delta; assert(ts); if (u == (usec_t) -1) { ts->realtime = ts->monotonic = (usec_t) -1; return ts; } ts->monotonic = u; delta = (int64_t) now(CLOCK_MONOTONIC) - (int64_t) u; ts->realtime = now(CLOCK_REALTIME); if ((int64_t) ts->realtime > delta) ts->realtime -= delta; else ts->realtime = 0; return ts; } usec_t timespec_load(const struct timespec *ts) { assert(ts); if (ts->tv_sec == (time_t) -1 && ts->tv_nsec == (long) -1) return (usec_t) -1; if ((usec_t) ts->tv_sec > (UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / USEC_PER_SEC) return (usec_t) -1; return (usec_t) ts->tv_sec * USEC_PER_SEC + (usec_t) ts->tv_nsec / NSEC_PER_USEC; } struct timespec *timespec_store(struct timespec *ts, usec_t u) { assert(ts); if (u == (usec_t) -1) { ts->tv_sec = (time_t) -1; ts->tv_nsec = (long) -1; return ts; } ts->tv_sec = (time_t) (u / USEC_PER_SEC); ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC); return ts; } usec_t timeval_load(const struct timeval *tv) { assert(tv); if (tv->tv_sec == (time_t) -1 && tv->tv_usec == (suseconds_t) -1) return (usec_t) -1; if ((usec_t) tv->tv_sec > (UINT64_MAX - tv->tv_usec) / USEC_PER_SEC) return (usec_t) -1; return (usec_t) tv->tv_sec * USEC_PER_SEC + (usec_t) tv->tv_usec; } struct timeval *timeval_store(struct timeval *tv, usec_t u) { assert(tv); if (u == (usec_t) -1) { tv->tv_sec = (time_t) -1; tv->tv_usec = (suseconds_t) -1; return tv; } tv->tv_sec = (time_t) (u / USEC_PER_SEC); tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC); return tv; } char *format_timestamp(char *buf, size_t l, usec_t t) { struct tm tm; time_t sec; assert(buf); assert(l > 0); if (t <= 0) return NULL; sec = (time_t) (t / USEC_PER_SEC); if (strftime(buf, l, "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) <= 0) return NULL; return buf; } char *format_timestamp_relative(char *buf, size_t l, usec_t t) { usec_t n, d; n = now(CLOCK_REALTIME); if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t) return NULL; d = n - t; if (d >= USEC_PER_YEAR) snprintf(buf, l, "%llu years %llu months ago", (unsigned long long) (d / USEC_PER_YEAR), (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH)); else if (d >= USEC_PER_MONTH) snprintf(buf, l, "%llu months %llu days ago", (unsigned long long) (d / USEC_PER_MONTH), (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY)); else if (d >= USEC_PER_WEEK) snprintf(buf, l, "%llu weeks %llu days ago", (unsigned long long) (d / USEC_PER_WEEK), (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY)); else if (d >= 2*USEC_PER_DAY) snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY)); else if (d >= 25*USEC_PER_HOUR) snprintf(buf, l, "1 day %lluh ago", (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR)); else if (d >= 6*USEC_PER_HOUR) snprintf(buf, l, "%lluh ago", (unsigned long long) (d / USEC_PER_HOUR)); else if (d >= USEC_PER_HOUR) snprintf(buf, l, "%lluh %llumin ago", (unsigned long long) (d / USEC_PER_HOUR), (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE)); else if (d >= 5*USEC_PER_MINUTE) snprintf(buf, l, "%llumin ago", (unsigned long long) (d / USEC_PER_MINUTE)); else if (d >= USEC_PER_MINUTE) snprintf(buf, l, "%llumin %llus ago", (unsigned long long) (d / USEC_PER_MINUTE), (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC)); else if (d >= USEC_PER_SEC) snprintf(buf, l, "%llus ago", (unsigned long long) (d / USEC_PER_SEC)); else if (d >= USEC_PER_MSEC) snprintf(buf, l, "%llums ago", (unsigned long long) (d / USEC_PER_MSEC)); else if (d > 0) snprintf(buf, l, "%lluus ago", (unsigned long long) d); else snprintf(buf, l, "now"); buf[l-1] = 0; return buf; } char *format_timespan(char *buf, size_t l, usec_t t) { static const struct { const char *suffix; usec_t usec; } table[] = { { "y", USEC_PER_YEAR }, { "month", USEC_PER_MONTH }, { "w", USEC_PER_WEEK }, { "d", USEC_PER_DAY }, { "h", USEC_PER_HOUR }, { "min", USEC_PER_MINUTE }, { "s", USEC_PER_SEC }, { "ms", USEC_PER_MSEC }, { "us", 1 }, }; unsigned i; char *p = buf; assert(buf); assert(l > 0); if (t == (usec_t) -1) return NULL; if (t == 0) { snprintf(p, l, "0"); p[l-1] = 0; return p; } /* The result of this function can be parsed with parse_usec */ for (i = 0; i < ELEMENTSOF(table); i++) { int k; size_t n; if (t < table[i].usec) continue; if (l <= 1) break; k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix); n = MIN((size_t) k, l); l -= n; p += n; t %= table[i].usec; } *p = 0; return buf; } void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) { assert(f); assert(name); assert(t); if (!dual_timestamp_is_set(t)) return; fprintf(f, "%s=%llu %llu\n", name, (unsigned long long) t->realtime, (unsigned long long) t->monotonic); } void dual_timestamp_deserialize(const char *value, dual_timestamp *t) { unsigned long long a, b; assert(value); assert(t); if (sscanf(value, "%lli %llu", &a, &b) != 2) log_debug("Failed to parse finish timestamp value %s", value); else { t->realtime = a; t->monotonic = b; } } int parse_timestamp(const char *t, usec_t *usec) { static const struct { const char *name; const int nr; } day_nr[] = { { "Sunday", 0 }, { "Sun", 0 }, { "Monday", 1 }, { "Mon", 1 }, { "Tuesday", 2 }, { "Tue", 2 }, { "Wednesday", 3 }, { "Wed", 3 }, { "Thursday", 4 }, { "Thu", 4 }, { "Friday", 5 }, { "Fri", 5 }, { "Saturday", 6 }, { "Sat", 6 }, }; const char *k; struct tm tm, copy; time_t x; usec_t plus = 0, minus = 0, ret; int r, weekday = -1; unsigned i; /* * Allowed syntaxes: * * 2012-09-22 16:34:22 * 2012-09-22 16:34 (seconds will be set to 0) * 2012-09-22 (time will be set to 00:00:00) * 16:34:22 (date will be set to today) * 16:34 (date will be set to today, seconds to 0) * now * yesterday (time is set to 00:00:00) * today (time is set to 00:00:00) * tomorrow (time is set to 00:00:00) * +5min * -5days * */ assert(t); assert(usec); x = time(NULL); assert_se(localtime_r(&x, &tm)); tm.tm_isdst = -1; if (streq(t, "now")) goto finish; else if (streq(t, "today")) { tm.tm_sec = tm.tm_min = tm.tm_hour = 0; goto finish; } else if (streq(t, "yesterday")) { tm.tm_mday --; tm.tm_sec = tm.tm_min = tm.tm_hour = 0; goto finish; } else if (streq(t, "tomorrow")) { tm.tm_mday ++; tm.tm_sec = tm.tm_min = tm.tm_hour = 0; goto finish; } else if (t[0] == '+') { r = parse_usec(t+1, &plus); if (r < 0) return r; goto finish; } else if (t[0] == '-') { r = parse_usec(t+1, &minus); if (r < 0) return r; goto finish; } else if (endswith(t, " ago")) { _cleanup_free_ char *z; z = strndup(t, strlen(t) - 4); if (!z) return -ENOMEM; r = parse_usec(z, &minus); if (r < 0) return r; goto finish; } for (i = 0; i < ELEMENTSOF(day_nr); i++) { size_t skip; if (!startswith_no_case(t, day_nr[i].name)) continue; skip = strlen(day_nr[i].name); if (t[skip] != ' ') continue; weekday = day_nr[i].nr; t += skip + 1; break; } copy = tm; k = strptime(t, "%y-%m-%d %H:%M:%S", &tm); if (k && *k == 0) goto finish; tm = copy; k = strptime(t, "%Y-%m-%d %H:%M:%S", &tm); if (k && *k == 0) goto finish; tm = copy; k = strptime(t, "%y-%m-%d %H:%M", &tm); if (k && *k == 0) { tm.tm_sec = 0; goto finish; } tm = copy; k = strptime(t, "%Y-%m-%d %H:%M", &tm); if (k && *k == 0) { tm.tm_sec = 0; goto finish; } tm = copy; k = strptime(t, "%y-%m-%d", &tm); if (k && *k == 0) { tm.tm_sec = tm.tm_min = tm.tm_hour = 0; goto finish; } tm = copy; k = strptime(t, "%Y-%m-%d", &tm); if (k && *k == 0) { tm.tm_sec = tm.tm_min = tm.tm_hour = 0; goto finish; } tm = copy; k = strptime(t, "%H:%M:%S", &tm); if (k && *k == 0) goto finish; tm = copy; k = strptime(t, "%H:%M", &tm); if (k && *k == 0) { tm.tm_sec = 0; goto finish; } return -EINVAL; finish: x = mktime(&tm); if (x == (time_t) -1) return -EINVAL; if (weekday >= 0 && tm.tm_wday != weekday) return -EINVAL; ret = (usec_t) x * USEC_PER_SEC; ret += plus; if (ret > minus) ret -= minus; else ret = 0; *usec = ret; return 0; } int parse_usec(const char *t, usec_t *usec) { static const struct { const char *suffix; usec_t usec; } table[] = { { "seconds", USEC_PER_SEC }, { "second", USEC_PER_SEC }, { "sec", USEC_PER_SEC }, { "s", USEC_PER_SEC }, { "minutes", USEC_PER_MINUTE }, { "minute", USEC_PER_MINUTE }, { "min", USEC_PER_MINUTE }, { "months", USEC_PER_MONTH }, { "month", USEC_PER_MONTH }, { "msec", USEC_PER_MSEC }, { "ms", USEC_PER_MSEC }, { "m", USEC_PER_MINUTE }, { "hours", USEC_PER_HOUR }, { "hour", USEC_PER_HOUR }, { "hr", USEC_PER_HOUR }, { "h", USEC_PER_HOUR }, { "days", USEC_PER_DAY }, { "day", USEC_PER_DAY }, { "d", USEC_PER_DAY }, { "weeks", USEC_PER_WEEK }, { "week", USEC_PER_WEEK }, { "w", USEC_PER_WEEK }, { "years", USEC_PER_YEAR }, { "year", USEC_PER_YEAR }, { "y", USEC_PER_YEAR }, { "usec", 1ULL }, { "us", 1ULL }, { "", USEC_PER_SEC }, /* default is sec */ }; const char *p; usec_t r = 0; assert(t); assert(usec); p = t; do { long long l; char *e; unsigned i; errno = 0; l = strtoll(p, &e, 10); if (errno != 0) return -errno; if (l < 0) return -ERANGE; if (e == p) return -EINVAL; e += strspn(e, WHITESPACE); for (i = 0; i < ELEMENTSOF(table); i++) if (startswith(e, table[i].suffix)) { r += (usec_t) l * table[i].usec; p = e + strlen(table[i].suffix); break; } if (i >= ELEMENTSOF(table)) return -EINVAL; } while (*p != 0); *usec = r; return 0; } int parse_nsec(const char *t, nsec_t *nsec) { static const struct { const char *suffix; nsec_t nsec; } table[] = { { "seconds", NSEC_PER_SEC }, { "second", NSEC_PER_SEC }, { "sec", NSEC_PER_SEC }, { "s", NSEC_PER_SEC }, { "minutes", NSEC_PER_MINUTE }, { "minute", NSEC_PER_MINUTE }, { "min", NSEC_PER_MINUTE }, { "months", NSEC_PER_MONTH }, { "month", NSEC_PER_MONTH }, { "msec", NSEC_PER_MSEC }, { "ms", NSEC_PER_MSEC }, { "m", NSEC_PER_MINUTE }, { "hours", NSEC_PER_HOUR }, { "hour", NSEC_PER_HOUR }, { "hr", NSEC_PER_HOUR }, { "h", NSEC_PER_HOUR }, { "days", NSEC_PER_DAY }, { "day", NSEC_PER_DAY }, { "d", NSEC_PER_DAY }, { "weeks", NSEC_PER_WEEK }, { "week", NSEC_PER_WEEK }, { "w", NSEC_PER_WEEK }, { "years", NSEC_PER_YEAR }, { "year", NSEC_PER_YEAR }, { "y", NSEC_PER_YEAR }, { "usec", NSEC_PER_USEC }, { "us", NSEC_PER_USEC }, { "nsec", 1ULL }, { "ns", 1ULL }, { "", 1ULL }, /* default is nsec */ }; const char *p; nsec_t r = 0; assert(t); assert(nsec); p = t; do { long long l; char *e; unsigned i; errno = 0; l = strtoll(p, &e, 10); if (errno != 0) return -errno; if (l < 0) return -ERANGE; if (e == p) return -EINVAL; e += strspn(e, WHITESPACE); for (i = 0; i < ELEMENTSOF(table); i++) if (startswith(e, table[i].suffix)) { r += (nsec_t) l * table[i].nsec; p = e + strlen(table[i].suffix); break; } if (i >= ELEMENTSOF(table)) return -EINVAL; } while (*p != 0); *nsec = r; return 0; }