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added Tilghman's settimeofday(2) implementation

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gdr 1997-12-21 20:13:19 +00:00
parent 97ab3c7a62
commit 5aa367e6ff
1 changed files with 88 additions and 1 deletions
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89
lib/libc/sys/syscall.c
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@ -9,7 +9,7 @@
* Unless otherwise specified, see the respective man pages for details
* about these routines.
*
* $Id: syscall.c,v 1.5 1997/10/30 04:46:53 gdr Exp $
* $Id: syscall.c,v 1.6 1997/12/21 20:13:19 gdr Exp $
*
* This file is formatted with tab stops every 3 columns.
*/
@ -46,6 +46,7 @@ segment "libc_sys__";
#include <fcntl.h>
#include <stdarg.h>
#include <sys/mount.h>
#include <misctool.h>
/*
* This is the maximum file name length allowed to be returned by GS/OS
@ -643,6 +644,8 @@ getpgrp (void) {
* gettimeofday
*
* IIgs HACK! HACK! HACK! We need a real gettimeofday!
* The implementation for settimeofday is a start, but we're not currently
* handling timezones properly.
*/
int
@ -903,6 +906,90 @@ rmdir (const char *path) {
return result;
}
/*
* settimeofday
*
* This implementation is not complete; it doesn't currently handle
* timezone information.
*/
#define SECS_PER_YEAR 31536000 /* number of seconds in 365 days */
int
settimeofday (struct timeval *tp, struct timezone *notused)
{
Byte month, day, curYear, hour, minute, second;
long mytime;
int i, year;
HexTime hextime;
int monthanddays[12] = { 31,28,31,30,31,30,31,31,30,31,30,31};
if (geteuid() != 0) {
/* not superuser */
errno = EPERM;
return -1;
}
if (tp == NULL) {
/* No time specified */
return 0;
}
mytime = tp->tv_sec;
/* Since microseconds cannot be set, tv_usec is ignored. */
year = 1970;
for (i = 1970; i < 2155; i++) {
mytime -= SECS_PER_YEAR;
if (mytime < 0) {
break;
}
if ((year % 4 == 0) && (year != 2100)) {
/* leap year */
mytime -= 86400;
if (mytime < 0) {
mytime += 86400;
i=2155;
break;
}
}
year++;
}
hextime.curYear = (Byte) year - 1900;
mytime += SECS_PER_YEAR; /* add the last subtraction back in */
if ((year % 4 == 0) && (year != 2100)) {
monthanddays[1] = 29;
}
hextime.month = (Byte) 0;
for (i = 0; i < 12; i++) {
mytime -= (monthanddays[i]) * 86400;
if (mytime < 0) {
mytime += monthanddays[i] * 86400;
i=12;
break;
}
hextime.month++;
}
hextime.day = (Byte) mytime / 86400;
mytime = mytime % 86400;
hextime.hour = (Byte) mytime / 3600;
mytime = mytime % 3600;
hextime.minute = (Byte) mytime / 60;
mytime = mytime % 60;
hextime.second = (Byte) mytime;
WriteTimeHex(hextime);
return 0;
}
/*
* sigprocmask - This would be much more efficient if it was implemented
* in the kernel. Note that in most cases we are doing