sed: Can't open /usr/web/plan9/sources.html #include <u.h> #include <libc.h> #include "regexp.h" void regerror(char *s) { char buf[132]; strcpy(buf, "regerror: "); strcat(buf, s); strcat(buf, "\n"); write(2, buf, strlen(buf)); exits("regerr"); } sed: Can't open /usr/web/plan9/sources.html