diff options
Diffstat (limited to 'src/legacy/cuserid.c')
-rw-r--r-- | src/legacy/cuserid.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/legacy/cuserid.c b/src/legacy/cuserid.c index 4e78798d..dcaf73d4 100644 --- a/src/legacy/cuserid.c +++ b/src/legacy/cuserid.c @@ -2,13 +2,21 @@ #include <pwd.h> #include <stdio.h> #include <unistd.h> +#include <string.h> char *cuserid(char *buf) { + static char usridbuf[L_cuserid]; struct passwd pw, *ppw; long pwb[256]; - if (getpwuid_r(geteuid(), &pw, (void *)pwb, sizeof pwb, &ppw)) - return 0; - snprintf(buf, L_cuserid, "%s", pw.pw_name); + 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 buf; + if (!buf) buf = usridbuf; + memcpy(buf, pw.pw_name, len+1); return buf; } |