diff options
Diffstat (limited to 'REORG.TODO/sysdeps/posix/cuserid.c')
-rw-r--r-- | REORG.TODO/sysdeps/posix/cuserid.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/posix/cuserid.c b/REORG.TODO/sysdeps/posix/cuserid.c new file mode 100644 index 0000000000..bee9734793 --- /dev/null +++ b/REORG.TODO/sysdeps/posix/cuserid.c @@ -0,0 +1,47 @@ +/* Copyright (C) 1991-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <pwd.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> + +/* Return the username of the caller. + If S is not NULL, it points to a buffer of at least L_cuserid bytes + into which the name is copied; otherwise, a static buffer is used. */ +char * +cuserid (char *s) +{ + static char name[L_cuserid]; + char buf[NSS_BUFLEN_PASSWD]; + struct passwd pwent; + struct passwd *pwptr; + + if (__getpwuid_r (__geteuid (), &pwent, buf, sizeof (buf), &pwptr) + || pwptr == NULL) + { + if (s != NULL) + s[0] = '\0'; + return s; + } + + if (s == NULL) + s = name; + s[L_cuserid - 1] = '\0'; + return strncpy (s, pwptr->pw_name, L_cuserid - 1); +} |