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
|
implement Fsmodule;
include "sys.m";
sys: Sys;
include "draw.m";
include "sh.m";
include "fslib.m";
fslib: Fslib;
Report, Value, type2s: import fslib;
Fschan, Fsdata, Entrychan, Cmpchan, Entry,
Gatechan, Gatequery, Nilentry, Option,
Next, Down, Skip, Quit: import Fslib;
# e.g....
# fs select {mode -d} {merge -c {compose -d AoutB} {filter {not {path /chan /dev /usr/rog /n/local /net}} /} {merge {proto FreeBSD} {proto Hp} {proto Irix} {proto Linux} {proto MacOSX} {proto Nt} {proto Nt.ti} {proto Nt.ti925} {proto Plan9} {proto Plan9.ti} {proto Plan9.ti925} {proto Solaris} {proto authsrv} {proto dl} {proto dlsrc} {proto ep7} {proto inferno} {proto inferno.ti} {proto ipaqfs} {proto minitel} {proto os} {proto scheduler.client} {proto scheduler.server} {proto sds} {proto src} {proto src.ti} {proto sword} {proto ti925.ti} {proto ti925bin} {proto tipaq} {proto umec} {proto utils} {proto utils.ti}}} >[2] /dev/null
types(): string
{
return "xxxx*-1-cm";
}
init()
{
sys = load Sys Sys->PATH;
fslib = load Fslib Fslib->PATH;
if(fslib == nil){
sys->fprint(sys->fildes(2), "fs: cannot load %s: %r\n", Fslib->PATH);
raise "fail:bad module";
}
}
run(nil: ref Draw->Context, nil: ref Report,
opts: list of Option, args: list of ref Value): ref Value
{
recurse := 1;
cmp: Cmpchan;
for(; opts != nil; opts = tl opts){
case (hd opts).opt {
'1' =>
recurse = 0;
'c' =>
cmp = (hd (hd opts).args).m().i;
}
}
dst := chan of (Fsdata, chan of int);
spawn mergeproc((hd args).x().i, (hd tl args).x().i, dst, recurse, cmp, tl tl args == nil);
for(args = tl tl args; args != nil; args = tl args){
dst1 := chan of (Fsdata, chan of int);
spawn mergeproc(dst, (hd args).x().i, dst1, recurse, cmp, tl args == nil);
dst = dst1;
}
return ref Value.X(dst);
}
# merge two trees; assume directories are alphabetically sorted.
mergeproc(c0, c1, dst: Fschan, recurse: int, cmp: Cmpchan, killcmp: int)
{
myreply := chan of int;
((d0, nil), reply0) := <-c0;
((d1, nil), reply1) := <-c1;
if(compare(cmp, d0, d1) == 2r10)
dst <-= ((d1, nil), myreply);
else
dst <-= ((d0, nil), myreply);
r := <-myreply;
reply0 <-= r;
reply1 <-= r;
if(r == Down){
{
mergedir(c0, c1, dst, recurse, cmp);
} exception {"exit" =>;}
}
if(cmp != nil && killcmp)
cmp <-= (nil, nil, nil);
}
mergedir(c0, c1, dst: Fschan, recurse: int, cmp: Cmpchan)
{
myreply := chan of int;
reply0, reply1: chan of int;
d0, d1: ref Sys->Dir;
eof0 := eof1 := 0;
for(;;){
if(!eof0 && d0 == nil){
((d0, nil), reply0) = <-c0;
if(d0 == nil){
reply0 <-= Next;
eof0 = 1;
}
}
if(!eof1 && d1 == nil){
((d1, nil), reply1) = <-c1;
if(d1 == nil){
reply1 <-= Next;
eof1 = 1;
}
}
if(eof0 && eof1)
break;
(wd0, wd1) := (d0, d1);
if(d0 != nil && d1 != nil && d0.name != d1.name){
if(d0.name < d1.name)
wd1 = nil;
else
wd0 = nil;
}
wc0, wc1: Fschan;
wreply0, wreply1: chan of int;
weof0, weof1: int;
c := compare(cmp, wd0, wd1);
if(wd0 != nil && wd1 != nil){
if(c != 0 && recurse && (wd0.mode & wd1.mode & Sys->DMDIR) != 0){
dst <-= ((wd0, nil), myreply);
r := <-myreply;
reply0 <-= r;
reply1 <-= r;
d0 = d1 = nil;
case r {
Quit =>
raise "exit";
Skip =>
return;
Down =>
mergedir(c0, c1, dst, 1, cmp);
}
continue;
}
# when we can't merge and there's a clash, choose c0 over c1, unless cmp says otherwise
if(c == 2r10){
reply0 <-= Next;
d0 = nil;
}else{
reply1 <-= Next;
d1 = nil;
}
}
if(c & 2r01){
(wd0, wc0, wreply0, weof0) = (d0, c0, reply0, eof0);
(wd1, wc1, wreply1, weof1) = (d1, c1, reply1, eof1);
d0 = nil;
}else if(c & 2r10){
(wd0, wc0, wreply0, weof0) = (d1, c1, reply1, eof1);
(wd1, wc1, wreply1, weof1) = (d0, c0, reply0, eof0);
d1 = nil;
}else{
if(wd0 == nil){
reply1 <-= Next;
d1 = nil;
}else{
reply0 <-= Next;
d0 = nil;
}
continue;
}
dst <-= ((wd0, nil), myreply);
r := <-myreply;
wreply0 <-= r;
if(r == Down)
r = fslib->copy(wc0, dst); # XXX hmm, maybe this should be a mergedir()
case r {
Quit or
Skip =>
if(wd1 == nil && !weof1)
(nil, wreply1) = <-wc1;
wreply1 <-= r;
if(r == Quit)
raise "exit";
return;
}
}
dst <-= ((nil, nil), myreply);
if(<-myreply == Quit)
raise "exit";
}
compare(cmp: Cmpchan, d0, d1: ref Sys->Dir): int
{
mask := (d0 != nil) | (d1 != nil) << 1;
if(cmp == nil)
return mask;
reply := chan of int;
cmp <-= (d0, d1, reply);
return <-reply & mask;
}
|
