_p9translate.c (890B)
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 }