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https://github.com/9fans/plan9port.git
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46 lines
902 B
C
46 lines
902 B
C
#include <u.h>
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#include <libc.h>
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/*
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* I don't want too many of these,
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* but the ones we have are just too useful.
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*/
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static struct {
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char *old;
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char *new;
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} replace[] = {
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"#9", nil, /* must be first */
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"#d", "/dev/fd",
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};
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char*
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plan9translate(char *old)
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{
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char *new;
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int i, olen, nlen, len;
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if(replace[0].new == nil){
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replace[0].new = getenv("PLAN9");
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if(replace[0].new == nil)
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replace[0].new = "/usr/local/plan9";
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}
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for(i=0; i<nelem(replace); i++){
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if(!replace[i].new)
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continue;
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olen = strlen(replace[i].old);
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if(strncmp(old, replace[i].old, olen) != 0
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|| (old[olen] != '\0' && old[olen] != '/'))
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continue;
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nlen = strlen(replace[i].new);
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len = strlen(old)+nlen-olen;
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new = malloc(len+1);
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if(new == nil)
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return "<out of memory>";
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strcpy(new, replace[i].new);
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strcpy(new+nlen, old+olen);
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assert(strlen(new) == len);
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return new;
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}
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return old;
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}
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