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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
#include <u.h>
#include <libc.h>
#include <sys.h>
#include <fcall.h>
char buf[1048576];
#define NARG 5
uintptr arg[NARG];
/* system calls not defined in libc.h */
int sysr1(void);
int _stat(char*, char*);
int _fstat(int, char*);
int _errstr(char*);
int _wstat(char*, char*);
int _fwstat(int, char*);
int _read(int, void*, int);
int _write(int, void*, int);
int _read9p(int, void*, int);
int _write9p(int, void*, int);
int brk_(void*);
int _nfstat(int, void*, int);
int _nstat(char*, void*, int);
int _nfwstat(int, void*, int);
int _nwstat(char*, void*, int);
int _fsession(char*, void*, int);
int _mount(int, char*, int, char*);
int _wait(void*);
struct{
char *name;
int (*func)(...);
}tab[]={
#include "tab.h"
0, 0
};
uintptr parse(char *);
void catch(void*, char*);
char*
xctime(ulong t)
{
char *buf, *s;
s = ctime(t);
s[strlen(s)-1] = '\0'; /* remove newline */
buf = malloc(512);
if(buf == nil)
sysfatal("can't malloc: %r");
snprint(buf, 512, "%s (%lud)", s, t);
return buf;
}
char*
lstime(long l)
{
static char buf[32];
char *t;
long clk;
clk = time(0);
t = ctime(l);
/* 6 months in the past or a day in the future */
if(l<clk-180L*24*60*60 || clk+24L*60*60<l){
memmove(buf, t+4, 7); /* month and day */
memmove(buf+7, t+23, 5); /* year */
}else
memmove(buf, t+4, 12); /* skip day of week */
buf[12] = 0;
return buf;
}
void
main(int argc, char *argv[])
{
int i, j, c;
int oflag, xflag, sflag;
vlong r;
Dir d;
char strs[1024];
char ebuf[1024];
fmtinstall('M', dirmodefmt);
oflag = 0;
xflag = 0;
sflag = 0;
ARGBEGIN{
case 'o':
oflag++;
break;
case 's':
sflag++;
break;
case 'x':
xflag++;
break;
default:
goto Usage;
}ARGEND
if(argc<1 || argc>1+NARG){
Usage:
fprint(2, "usage: syscall [-ox] entry [args; buf==1MB buffer]\n");
fprint(2, "\tsyscall write 1 hello 5\n");
fprint(2, "\tsyscall -o errstr buf 1024\n");
fprint(2, "\tsyscall -[xs] stat file buf 1024\n");
exits("usage");
}
for(i=1; i<argc; i++)
arg[i-1] = parse(argv[i]);
notify(catch);
for(i=0; tab[i].name; i++)
if(strcmp(tab[i].name, argv[0])==0){
/* special case for seek, pread, pwrite; vlongs are problematic */
if(strcmp(argv[0], "seek") == 0)
r=seek(arg[0], strtoll(argv[2], 0, 0), arg[2]);
else if(strcmp(argv[0], "pread") == 0)
r=pread(arg[0], (void*)arg[1], arg[2], strtoll(argv[4], 0, 0));
else if(strcmp(argv[0], "pwrite") == 0)
r=pwrite(arg[0], (void*)arg[1], arg[2], strtoll(argv[4], 0, 0));
else
r=(*tab[i].func)(arg[0], arg[1], arg[2], arg[3], arg[4]);
if(r == -1){
errstr(ebuf, sizeof ebuf);
fprint(2, "syscall: return %lld, error:%s\n", r, ebuf);
}else{
ebuf[0] = 0;
fprint(2, "syscall: return %lld, no error\n", r);
}
if(oflag)
print("%s\n", buf);
if(xflag){
for(j=0; j<r; j++){
if(j%16 == 0)
print("%.4x\t", j);
c = buf[j]&0xFF;
if('!'<=c && c<='~')
print(" %c ", c);
else
print("%.2ux ", c);
if(j%16 == 15)
print("\n");
}
print("\n");
}
if(sflag && r > 0){
r = convM2D((uchar*)buf, r, &d, strs);
if(r <= BIT16SZ)
print("short stat message\n");
else{
print("[%s] ", d.muid);
print("(%.16llux %lud %.2ux) ", d.qid.path, d.qid.vers, d.qid.type);
print("%M (%luo) ", d.mode, d.mode);
print("%c %d ", d.type, d.dev);
print("%s %s ", d.uid, d.gid);
print("%lld ", d.length);
print("%s ", lstime(d.mtime));
print("%s\n", d.name);
print("\tmtime: %s\n\tatime: %s\n", xctime(d.mtime), xctime(d.atime));
}
}
exits(ebuf);
}
fprint(2, "syscall: %s not known\n", argv[0]);
exits("unknown");
}
uintptr
parse(char *s)
{
char *t;
uintptr l;
if(strcmp(s, "buf") == 0)
return (uintptr)buf;
l = strtoull(s, &t, 0);
if(t>s && *t==0)
return l;
return (uintptr)s;
}
void
catch(void *, char *msg)
{
fprint(2, "syscall: received note='%s'\n", msg);
noted(NDFLT);
}
|
