static char usridbuf[L_cuserid];
struct passwd pw, *ppw;
long pwb[256];
- if (getpwuid_r(geteuid(), &pw, (void *)pwb, sizeof pwb, &ppw))
- return 0;
+ if (buf) *buf = 0;
+ getpwuid_r(geteuid(), &pw, (void *)pwb, sizeof pwb, &ppw);
+ if (!ppw)
+ return buf;
size_t len = strnlen(pw.pw_name, L_cuserid);
if (len == L_cuserid)
- return 0;
+ return buf;
if (!buf) buf = usridbuf;
memcpy(buf, pw.pw_name, len+1);
return buf;