All Questions
Tagged with unix-timestamp c
38
questions
0
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3
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How to get milliseconds passed since unix epoch in C without multiplying seconds by 1000?
The only thing I know is time(NULL), but it return seconds since 1970.
It's fine to me to use WinApi functions if C doesn't have needed function.
I even found GetLocalTime WinApi function, but it ...
- 4,081
0
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1
answer
534
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How to measure CPU time of a process in C?
I would like to measure the CPU and User time passed between starting a process and sending SIGINT signal using C times function.
However, on print I just get 0. Can't see the problem..
#include <...
- 3,353
1
vote
2
answers
295
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Unix Time stamp creation in C from custom data fields
I wish to create a Unix time stamp. I have a micro-controller with a ble connection that I send the present time to via a GATT connection. I receive the data several integers.
These are Year, Month, ...
- 822
2
votes
1
answer
585
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MinGW localtime_r works in one time zone, fails in another
I have the following file test.c:
#define _POSIX_THREAD_SAFE_FUNCTIONS
#include <time.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <inttypes....
- 4,725
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86
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Unix time -> string using C on mobile (Android/iOS)
Given a Unix time, as number of seconds since Jan 1st, 1970, how can I convert that to a human-readable string (say, ISO-8601) using C on Android and iOS? The standard library's time.h implementation ...
- 2,088
0
votes
1
answer
395
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Is it safe to use (UTC Unix timestamp % 60) as the UTC seconds field?
I have an embedded device that's doing a crude time sync with a Linux-based wireless gateway's Unix time (time_t), which is set to UTC. I need to align some of my actions with the wall-clock time -- ...
- 408
0
votes
1
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511
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create unix timestamp before 1970 on windows using mktime in c
Using c I'd like to create a unix timestamp for dates before 1970 with visual studio (or preferably both VS and GCC). The timestamp should be created from date parts. From what I can tell visual ...
- 3,194
1
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3
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Converting unix time into readable time
I've got the unix time since January 1st 1970 (E.G 1531074816) from my GPS module, how do I convert this into a readable format? I only need to get the current hour, minutes and seconds. I'm not ...
- 47
15
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6
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Will `gmtime()` report seconds as 60 when in a leap second?
I have a server running in TZ=UTC and I have code like this:
time_t t = time(NULL);
struct tm tm;
gmtime_r(&t, &tm);
The question is will tm.tm_sec == 60 when the server is within a leap ...
- 4,055
-2
votes
1
answer
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Standard C - How to use a unix epoch timestamp other than Jan 1, 1970?
Timestamp is defined as the number of seconds elapsed since midnight of January 1, 2000, UTC. Using standard C only, how to get unix timestamp with epoch of Jan 1, 2000 UTC and not Jan 1, 1970?
time(...
- 1,161
2
votes
2
answers
495
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get process start time in kernel module solaris
I am trying to get process start time in kernel module.
I get the proc struct pointer, and from the proc I take field p_mstart ()
typedef struct proc {
.....
/*
* Microstate accounting, resource ...
- 4,854
2
votes
1
answer
1k
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Date formatting in pure C using time zones
I want to implement Unix milliseconds converter to human readable date format.
using this post https://stackoverflow.com/a/1657307/1979882 I found I can receive such string but I can't setup a time ...
- 27k
0
votes
2
answers
944
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strptime does not works with timezone format specifier
I am new to c and trying out on strptime function, which converts string time to structure tm. After converting i am not getting right time. everything is fine but year is displaying wrong(default ...
- 253
2
votes
2
answers
1k
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c/c++ - convert between Unix time and the "Gregorian time"
I now have timestamps which are in microseconds since midnight, January 1st, 0 AD nominal Gregorian, after searching I noticed that some people call this "native Symbian time"? Whatever it is, I ...
- 23
4
votes
2
answers
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time function in C always displays "Wed Dec 31 23:59:59 1969"
I require the current date and time to be logged for my application.
I have written the code in C. I have attached the code
#include <stdio.h>
#include <time.h>
int main()
{ time_t t;
...
- 69