ref: c8b187f9db503465460d8bafa2d7a758bbcf59ca
dir: /lib9/errstr-posix.c/
#include "lib9.h" #include <errno.h> static char errstring[ERRMAX]; enum { Magic = 0xffffff }; void werrstr(char *fmt, ...) { va_list arg; va_start(arg, fmt); vseprint(errstring, errstring+sizeof(errstring), fmt, arg); va_end(arg); errno = Magic; } void oserrstr(char *buf, uint nerr) { char *s; if(errno != EINTR) s = strerror(errno); else s = "interrupted"; utfecpy(buf, buf+nerr, s); } int errstr(char *buf, uint nerr) { if(errno == Magic) utfecpy(buf, buf+nerr, errstring); else oserrstr(buf, nerr); return 1; }