From: Dominik Csapak <d.csapak@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox-backup 01/10] tools/systemd/time: let libc normalize time for us
Date: Thu, 3 Sep 2020 13:39:51 +0200 [thread overview]
Message-ID: <20200903114000.6932-2-d.csapak@proxmox.com> (raw)
In-Reply-To: <20200903114000.6932-1-d.csapak@proxmox.com>
mktime/gmtime can normalize time and even can handle special timezone
cases like the fact that the time 2:30 on specific day/timezone combos
do not exists
we have to convert the signature of all functions that use
normalize_time since mktime/gmtime can return an EOVERFLOW
but if this happens there is no way we can find a good time anyway
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
src/tools/systemd/time.rs | 16 ++---
src/tools/systemd/tm_editor.rs | 114 +++++++++------------------------
2 files changed, 37 insertions(+), 93 deletions(-)
diff --git a/src/tools/systemd/time.rs b/src/tools/systemd/time.rs
index 773a1509..edf26505 100644
--- a/src/tools/systemd/time.rs
+++ b/src/tools/systemd/time.rs
@@ -182,11 +182,11 @@ pub fn compute_next_event(
.find(|d| event.days.contains(WeekDays::from_bits(1<<d).unwrap()))
{
// try next day
- t.add_days(n - day_num, true);
+ t.add_days(n - day_num, true)?;
continue;
} else {
// try next week
- t.add_days(7 - day_num, true);
+ t.add_days(7 - day_num, true)?;
continue;
}
}
@@ -200,11 +200,11 @@ pub fn compute_next_event(
} else {
if let Some(n) = DateTimeValue::find_next(&event.hour, hour) {
// test next hour
- t.set_time(n as libc::c_int, 0, 0);
+ t.set_time(n as libc::c_int, 0, 0)?;
continue;
} else {
// test next day
- t.add_days(1, true);
+ t.add_days(1, true)?;
continue;
}
}
@@ -218,11 +218,11 @@ pub fn compute_next_event(
} else {
if let Some(n) = DateTimeValue::find_next(&event.minute, minute) {
// test next minute
- t.set_min_sec(n as libc::c_int, 0);
+ t.set_min_sec(n as libc::c_int, 0)?;
continue;
} else {
// test next hour
- t.set_time(t.hour() + 1, 0, 0);
+ t.set_time(t.hour() + 1, 0, 0)?;
continue;
}
}
@@ -236,11 +236,11 @@ pub fn compute_next_event(
} else {
if let Some(n) = DateTimeValue::find_next(&event.second, second) {
// test next second
- t.set_sec(n as libc::c_int);
+ t.set_sec(n as libc::c_int)?;
continue;
} else {
// test next min
- t.set_min_sec(t.min() + 1, 0);
+ t.set_min_sec(t.min() + 1, 0)?;
continue;
}
}
diff --git a/src/tools/systemd/tm_editor.rs b/src/tools/systemd/tm_editor.rs
index 3b81d1cb..62f8d1d0 100644
--- a/src/tools/systemd/tm_editor.rs
+++ b/src/tools/systemd/tm_editor.rs
@@ -22,24 +22,6 @@ pub struct TmEditor {
pub changes: TMChanges,
}
-fn is_leap_year(year: libc::c_int) -> bool {
- if year % 4 != 0 { return false; }
- if year % 100 != 0 { return true; }
- if year % 400 != 0 { return false; }
- return true;
-}
-
-fn days_in_month(mon: libc::c_int, year: libc::c_int) -> libc::c_int {
-
- let mon = mon % 12;
-
- static MAP: &[libc::c_int] = &[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
-
- if mon == 1 && is_leap_year(year) { return 29; }
-
- MAP[mon as usize]
-}
-
impl TmEditor {
pub fn new(epoch: i64, utc: bool) -> Result<Self, Error> {
@@ -50,12 +32,12 @@ impl TmEditor {
pub fn into_epoch(mut self) -> Result<i64, Error> {
self.t.tm_year -= 1900;
- let epoch = if self.utc { timegm(self.t)? } else { timelocal(self.t)? };
+ let epoch = if self.utc { timegm(&mut self.t)? } else { timelocal(&mut self.t)? };
Ok(epoch)
}
- pub fn add_days(&mut self, days: libc::c_int, reset_time: bool) {
- if days == 0 { return; }
+ pub fn add_days(&mut self, days: libc::c_int, reset_time: bool) -> Result<(), Error> {
+ if days == 0 { return Ok(()); }
if reset_time {
self.t.tm_hour = 0;
self.t.tm_min = 0;
@@ -65,7 +47,7 @@ impl TmEditor {
self.t.tm_mday += days;
self.t.tm_wday += days;
self.changes.insert(TMChanges::MDAY|TMChanges::WDAY);
- self.wrap_time();
+ self.normalize_time()
}
pub fn hour(&self) -> libc::c_int { self.t.tm_hour }
@@ -77,109 +59,71 @@ impl TmEditor {
(self.t.tm_wday + 6) % 7
}
- pub fn set_time(&mut self, hour: libc::c_int, min: libc::c_int, sec: libc::c_int) {
+ pub fn set_time(&mut self, hour: libc::c_int, min: libc::c_int, sec: libc::c_int) -> Result<(), Error> {
self.t.tm_hour = hour;
self.t.tm_min = min;
self.t.tm_sec = sec;
self.changes.insert(TMChanges::HOUR|TMChanges::MIN|TMChanges::SEC);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_min_sec(&mut self, min: libc::c_int, sec: libc::c_int) {
+ pub fn set_min_sec(&mut self, min: libc::c_int, sec: libc::c_int) -> Result<(), Error> {
self.t.tm_min = min;
self.t.tm_sec = sec;
self.changes.insert(TMChanges::MIN|TMChanges::SEC);
- self.wrap_time();
+ self.normalize_time()
}
- fn wrap_time(&mut self) {
-
- // sec: 0..59
- if self.t.tm_sec >= 60 {
- self.t.tm_min += self.t.tm_sec / 60;
- self.t.tm_sec %= 60;
- self.changes.insert(TMChanges::SEC|TMChanges::MIN);
+ fn normalize_time(&mut self) -> Result<(), Error> {
+ // libc normalizes it for us
+ if self.utc {
+ timegm(&mut self.t)?;
+ } else {
+ timelocal(&mut self.t)?;
}
-
- // min: 0..59
- if self.t.tm_min >= 60 {
- self.t.tm_hour += self.t.tm_min / 60;
- self.t.tm_min %= 60;
- self.changes.insert(TMChanges::MIN|TMChanges::HOUR);
- }
-
- // hour: 0..23
- if self.t.tm_hour >= 24 {
- self.t.tm_mday += self.t.tm_hour / 24;
- self.t.tm_wday += self.t.tm_hour / 24;
- self.t.tm_hour %= 24;
- self.changes.insert(TMChanges::HOUR|TMChanges::MDAY|TMChanges::WDAY);
- }
-
- // Translate to 0..($days_in_mon-1)
- self.t.tm_mday -= 1;
- loop {
- let days_in_mon = days_in_month(self.t.tm_mon, self.t.tm_year);
- if self.t.tm_mday < days_in_mon { break; }
- // Wrap one month
- self.t.tm_mday -= days_in_mon;
- self.t.tm_mon += 1;
- self.changes.insert(TMChanges::MDAY|TMChanges::WDAY|TMChanges::MON);
- }
-
- // Translate back to 1..$days_in_mon
- self.t.tm_mday += 1;
-
- // mon: 0..11
- if self.t.tm_mon >= 12 {
- self.t.tm_year += self.t.tm_mon / 12;
- self.t.tm_mon %= 12;
- self.changes.insert(TMChanges::MON|TMChanges::YEAR);
- }
-
- self.t.tm_wday %= 7;
+ Ok(())
}
- pub fn set_sec(&mut self, v: libc::c_int) {
+ pub fn set_sec(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_sec = v;
self.changes.insert(TMChanges::SEC);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_min(&mut self, v: libc::c_int) {
+ pub fn set_min(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_min = v;
self.changes.insert(TMChanges::MIN);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_hour(&mut self, v: libc::c_int) {
+ pub fn set_hour(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_hour = v;
self.changes.insert(TMChanges::HOUR);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_mday(&mut self, v: libc::c_int) {
+ pub fn set_mday(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_mday = v;
self.changes.insert(TMChanges::MDAY);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_mon(&mut self, v: libc::c_int) {
+ pub fn set_mon(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_mon = v;
self.changes.insert(TMChanges::MON);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_year(&mut self, v: libc::c_int) {
+ pub fn set_year(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_year = v;
self.changes.insert(TMChanges::YEAR);
- self.wrap_time();
+ self.normalize_time()
}
- pub fn set_wday(&mut self, v: libc::c_int) {
+ pub fn set_wday(&mut self, v: libc::c_int) -> Result<(), Error> {
self.t.tm_wday = v;
self.changes.insert(TMChanges::WDAY);
- self.wrap_time();
+ self.normalize_time()
}
}
--
2.20.1
next prev parent reply other threads:[~2020-09-03 11:40 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 11:39 [pbs-devel] [PATCH proxmox-backup 00/10] implement dates for calendarevents Dominik Csapak
2020-09-03 11:39 ` Dominik Csapak [this message]
2020-09-04 4:52 ` [pbs-devel] [PATCH proxmox-backup 01/10] tools/systemd/time: let libc normalize time for us Dietmar Maurer
2020-09-04 4:57 ` Dietmar Maurer
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 02/10] tools/systemd/time: move continue out of the if/else Dominik Csapak
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 03/10] tools/systemd/time: convert the resulting timestamp into an option Dominik Csapak
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 04/10] tools/systemd/tm_editor: remove reset_time from add_days and document it Dominik Csapak
2020-09-04 5:12 ` Dietmar Maurer
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 05/10] tools/systemd/parse_time: error out on invalid ranges Dominik Csapak
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 06/10] tools/systemd/time: fix selection for multiple options Dominik Csapak
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 07/10] tools/systemd/time: use i32 for DateTimeValues instead of u32 Dominik Csapak
2020-09-04 5:31 ` Dietmar Maurer
2020-09-04 5:39 ` Dietmar Maurer
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 08/10] tools/systemd/tm_editor: remove conversion of the year Dominik Csapak
2020-09-03 11:39 ` [pbs-devel] [PATCH proxmox-backup 09/10] tools/systemd/tm_editor: add setter/getter for months/years/days Dominik Csapak
2020-09-03 11:40 ` [pbs-devel] [PATCH proxmox-backup 10/10] tools/systemd/time: enable dates for calendarevents Dominik Csapak
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200903114000.6932-2-d.csapak@proxmox.com \
--to=d.csapak@proxmox.com \
--cc=pbs-devel@lists.proxmox.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.
Service provided by Proxmox Server Solutions GmbH | Privacy | Legal