1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2013 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* David Korn <dgkorn@gmail.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* sleep delay
*
* David Korn
* AT&T Labs
*
*/
#define sleep ______sleep
#include "defs.h"
#undef sleep
#include <error.h>
#include <errno.h>
#include <tmx.h>
#include "builtins.h"
#include "FEATURE/time"
#include "FEATURE/poll"
#ifdef _NEXT_SOURCE
# define sleep _ast_sleep
#endif /* _NEXT_SOURCE */
#ifdef _lib_poll_notimer
# undef _lib_poll
#endif /* _lib_poll_notimer */
int b_sleep(register int argc,char *argv[],void *extra)
{
register char *cp;
register double d=0;
register Shell_t *shp = ((Shbltin_t*)extra)->shp;
int sflag=0;
time_t tloc = 0;
char *last;
if(!(shp->sigflag[SIGALRM]&(SH_SIGFAULT|SH_SIGOFF)))
sh_sigtrap(SIGALRM);
while((argc = optget(argv,sh_optsleep))) switch(argc)
{
case 's':
sflag=1;
break;
case ':':
errormsg(SH_DICT,2, "%s", opt_info.arg);
break;
case '?':
errormsg(SH_DICT,ERROR_usage(2), "%s", opt_info.arg);
break;
}
argv += opt_info.index;
if(cp = *argv)
{
d = strtod(cp, &last);
if(*last)
{
Time_t now,ns;
char* pp;
now = TMX_NOW;
if(*cp == 'P' || *cp == 'p')
ns = tmxdate(cp, &last, now);
else
{
if(pp = sfprints("exact %s", cp))
ns = tmxdate(pp, &last, now);
if(*last && (pp = sfprints("p%s", cp)))
ns = tmxdate(pp, &last, now);
}
if(*last)
errormsg(SH_DICT,ERROR_exit(1),e_number,*argv);
d = ns - now;
d /= TMX_RESOLUTION;
}
if(argv[1])
errormsg(SH_DICT,ERROR_exit(1),e_oneoperand);
}
else if(!sflag)
errormsg(SH_DICT,ERROR_exit(1),e_oneoperand);
if(d > .10)
{
time(&tloc);
tloc += (time_t)(d+.5);
}
if(sflag && d==0)
pause();
else while(1)
{
time_t now;
errno = 0;
shp->lastsig=0;
sh_delay(d);
if(sflag || tloc==0 || errno!=EINTR || shp->lastsig)
break;
sh_sigcheck();
if(tloc < (now=time(NIL(time_t*))))
break;
d = (double)(tloc-now);
if(shp->sigflag[SIGALRM]&SH_SIGTRAP)
sh_timetraps();
}
return(0);
}
static void completed(void * handle)
{
char *expired = (char*)handle;
*expired = 1;
}
unsigned int sleep(unsigned int sec)
{
Shell_t *shp = &sh;
pid_t newpid, curpid=getpid();
void *tp;
char expired = 0;
shp->lastsig = 0;
tp = (void*)sh_timeradd(1000*sec, 0, completed, (void*)&expired);
do
{
if(!shp->waitevent || (*shp->waitevent)(-1,-1L,0)==0)
pause();
if(shp->sigflag[SIGALRM]&SH_SIGTRAP)
sh_timetraps();
if((newpid=getpid()) != curpid)
{
curpid = newpid;
shp->lastsig = 0;
shp->trapnote &= ~SH_SIGSET;
if(expired)
expired = 0;
else
timerdel(tp);
tp = (void*)sh_timeradd(1000*sec, 0, completed, (void*)&expired);
}
}
while(!expired && shp->lastsig==0);
if(!expired)
timerdel(tp);
sh_sigcheck();
return(0);
}
//
// Delay execution for time <t>.
//
void sh_delay(double t) {
Shell_t *shp = sh_getinterp();
int n = (int)t;
Tv_t ts, tx;
ts.tv_sec = n;
ts.tv_nsec = 1000000000 * (t - (double)n);
while (tvsleep(&ts, &tx) < 0 && errno == EINTR) {
if (shp->trapnote & (SH_SIGSET | SH_SIGTRAP)) return;
ts = tx;
}
}
|
