sed: Can't open /usr/web/plan9/sources.html #include <u.h> #include <libc.h> #include "regexp.h" /* substitute into one string using the matches from the last regexec() */ extern void regsub(char *sp, /* source string */ char *dp, /* destination string */ int dlen, Resub *mp, /* subexpression elements */ int ms) /* number of elements pointed to by mp */ { char *ssp, *ep; int i; ep = dp+dlen-1; while(*sp != '\0'){ if(*sp == '\\'){ switch(*++sp){ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': i = *sp-'0'; if(mp!=0 && mp[i].sp != 0 && ms>i) for(ssp = mp[i].sp; ssp < mp[i].ep; ssp++) if(dp < ep) *dp++ = *ssp; break; case '\\': if(dp < ep) *dp++ = '\\'; break; case '\0': sp--; break; default: if(dp < ep) *dp++ = *sp; break; } }else if(*sp == '&'){ if(mp!=0 && mp[0].sp != 0 && ms>0) for(ssp = mp[0].sp; ssp < mp[0].ep; ssp++) if(dp < ep) *dp++ = *ssp; }else{ if(dp < ep) *dp++ = *sp; } sp++; } *dp = '\0'; } sed: Can't open /usr/web/plan9/sources.html