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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6099 | serge | 1 | /* |
| 2 | FUNCTION |
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| 3 | < |
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| 4 | |||
| 5 | INDEX |
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| 6 | tzset |
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| 7 | INDEX |
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| 8 | _tzset_r |
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| 9 | |||
| 10 | ANSI_SYNOPSIS |
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| 11 | #include |
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| 12 | void tzset(void); |
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| 13 | void _tzset_r (struct _reent *<[reent_ptr]>); |
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| 14 | |||
| 15 | TRAD_SYNOPSIS |
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| 16 | #include |
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| 17 | void tzset(); |
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| 18 | void _tzset_r (<[reent_ptr]>); |
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| 19 | struct _reent *reent_ptr; |
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| 20 | |||
| 21 | DESCRIPTION |
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| 22 | < |
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| 23 | external variables: <<_timezone>>, <<_daylight>>, and < |
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| 24 | value of <<_timezone>> shall be the offset from the current time zone |
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| 25 | to GMT. The value of <<_daylight>> shall be 0 if there is no daylight |
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| 26 | savings time for the current time zone, otherwise it will be non-zero. |
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| 27 | The < |
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| 28 | standard time zone, the second is the name of the daylight-savings time |
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| 29 | zone. |
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| 30 | |||
| 31 | The TZ environment variable is expected to be in the following POSIX |
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| 32 | format: |
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| 33 | |||
| 34 | stdoffset1[dst[offset2][,start[/time1],end[/time2]]] |
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| 35 | |||
| 36 | where: std is the name of the standard time-zone (minimum 3 chars) |
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| 37 | offset1 is the value to add to local time to arrive at Universal time |
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| 38 | it has the form: hh[:mm[:ss]] |
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| 39 | dst is the name of the alternate (daylight-savings) time-zone (min 3 chars) |
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| 40 | offset2 is the value to add to local time to arrive at Universal time |
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| 41 | it has the same format as the std offset |
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| 42 | start is the day that the alternate time-zone starts |
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| 43 | time1 is the optional time that the alternate time-zone starts |
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| 44 | (this is in local time and defaults to 02:00:00 if not specified) |
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| 45 | end is the day that the alternate time-zone ends |
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| 46 | time2 is the time that the alternate time-zone ends |
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| 47 | (it is in local time and defaults to 02:00:00 if not specified) |
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| 48 | |||
| 49 | Note that there is no white-space padding between fields. Also note that |
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| 50 | if TZ is null, the default is Universal GMT which has no daylight-savings |
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| 51 | time. If TZ is empty, the default EST5EDT is used. |
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| 52 | |||
| 53 | The function <<_tzset_r>> is identical to < |
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| 54 | and is used for applications that use multiple threads. |
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| 55 | |||
| 56 | RETURNS |
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| 57 | There is no return value. |
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| 58 | |||
| 59 | PORTABILITY |
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| 60 | < |
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| 61 | |||
| 62 | Supporting OS subroutine required: None |
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| 63 | */ |
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| 64 | |||
| 65 | #include <_ansi.h> |
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| 66 | #include |
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| 67 | #include |
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| 68 | #include "local.h" |
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| 69 | |||
| 70 | _VOID |
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| 71 | _DEFUN_VOID (_tzset_unlocked) |
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| 72 | { |
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| 73 | _tzset_unlocked_r (_REENT); |
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| 74 | } |
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| 75 | |||
| 76 | _VOID |
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| 77 | _DEFUN_VOID (tzset) |
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| 78 | { |
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| 79 | TZ_LOCK; |
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| 80 | _tzset_unlocked_r (_REENT); |
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| 81 | TZ_UNLOCK; |
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| 82 | } |