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
|
#include "std.h"
#include "dat.h"
void
lbkick(Logbuf *lb)
{
char *s;
int n;
Req *r;
while(lb->wait && lb->rp != lb->wp){
r = lb->wait;
lb->wait = r->aux;
if(lb->wait == nil)
lb->waitlast = &lb->wait;
r->aux = nil;
if(r->ifcall.count < 5){
respond(r, "factotum: read request count too short");
continue;
}
s = lb->msg[lb->rp];
lb->msg[lb->rp] = nil;
if(++lb->rp == nelem(lb->msg))
lb->rp = 0;
n = r->ifcall.count;
if(n < strlen(s)+1+1){
memmove(r->ofcall.data, s, n-5);
n -= 5;
r->ofcall.data[n] = '\0';
/* look for first byte of UTF-8 sequence by skipping continuation bytes */
while(n>0 && (r->ofcall.data[--n]&0xC0)==0x80)
;
strcpy(r->ofcall.data+n, "...\n");
}else{
strcpy(r->ofcall.data, s);
strcat(r->ofcall.data, "\n");
}
r->ofcall.count = strlen(r->ofcall.data);
free(s);
respond(r, nil);
}
}
void
lbread(Logbuf *lb, Req *r)
{
if(lb->waitlast == nil)
lb->waitlast = &lb->wait;
*(lb->waitlast) = r;
lb->waitlast = (Req**)&r->aux;
r->aux = nil;
lbkick(lb);
}
void
lbflush(Logbuf *lb, Req *r)
{
Req **l;
for(l=&lb->wait; *l; l=(Req**)&(*l)->aux){
if(*l == r){
*l = r->aux;
r->aux = nil;
if(*l == nil)
lb->waitlast = l;
closereq(r);
break;
}
}
}
void
lbappend(Logbuf *lb, char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
lbvappend(lb, fmt, arg);
va_end(arg);
}
void
lbvappend(Logbuf *lb, char *fmt, va_list arg)
{
char *s;
s = smprint(fmt, arg);
if(s == nil)
sysfatal("out of memory");
if(lb->msg[lb->wp])
free(lb->msg[lb->wp]);
lb->msg[lb->wp] = s;
if(++lb->wp == nelem(lb->msg))
lb->wp = 0;
lbkick(lb);
}
Logbuf logbuf;
void
logread(Req *r)
{
lbread(&logbuf, r);
}
void
logflush(Req *r)
{
lbflush(&logbuf, r);
}
void
flog(char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
lbvappend(&logbuf, fmt, arg);
va_end(arg);
}
|