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 unsharp(char *old)
18 {
19 	char *new;
20 	int i, olen, nlen, len;
21 
22 	if(replace[0].new == nil)
23 		replace[0].new = get9root();
24 
25 	for(i=0; i<nelem(replace); i++){
26 		if(!replace[i].new)
27 			continue;
28 		olen = strlen(replace[i].old);
29 		if(strncmp(old, replace[i].old, olen) != 0
30 		|| (old[olen] != '\0' && old[olen] != '/'))
31 			continue;
32 		nlen = strlen(replace[i].new);
33 		len = strlen(old)+nlen-olen;
34 		new = malloc(len+1);
35 		if(new == nil)
36 			/* Most callers won't check the return value... */
37 			sysfatal("out of memory translating %s to %s%s", old, replace[i].new, old+olen);
38 		strcpy(new, replace[i].new);
39 		strcpy(new+nlen, old+olen);
40 		assert(strlen(new) == len);
41 		return new;
42 	}
43 	return old;
44 }