ref: 9600b2bd0271198a18f5acc22ed5f8bda43b3618
dir: /sys/src/libregexp/regerror.c/
#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");
}