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_p9translate.c - 9base - revived minimalist port of Plan 9 userland to Unix
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_p9translate.c (890B)
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1 #include <u.h>
2 #include <libc.h>
3
4 /*
5 * I don't want too many of these,
6 * but the ones we have are just too useful.
7 */
8 static struct {
9 char *old;
10 char *new;
11 } replace[] = {
12 "#9", nil, /* must be first */
13 "#d", "/dev/fd",
14 };
15
16 char*
17 plan9translate(char *old)
18 {
19 char *new;
20 int i, olen, nlen, len;
21
22 if(replace[0].new == nil){
23 replace[0].new = getenv("PLAN9");
24 if(replace[0].new == nil)
25 replace[0].new = PREFIX;
26 }
27
28 for(i=0; i<nelem(replace); i++){
29 if(!replace[i].new)
30 continue;
31 olen = strlen(replace[i].old);
32 if(strncmp(old, replace[i].old, olen) != 0
33 || (old[olen] != '\0' && old[olen] != '/'))
34 continue;
35 nlen = strlen(replace[i].new);
36 len = strlen(old)+nlen-olen;
37 new = malloc(len+1);
38 if(new == nil)
39 return "<out of memory>";
40 strcpy(new, replace[i].new);
41 strcpy(new+nlen, old+olen);
42 assert(strlen(new) == len);
43 return new;
44 }
45 return old;
46 }
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