diff options
Diffstat (limited to 'gnulib/lib/getlogin_r.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/getlogin_r.c | 88 |
2 files changed, 88 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/getlogin_r.c b/gnulib/lib/getlogin_r.c new file mode 100644 index 0000000..096a1fe --- /dev/null +++ b/gnulib/lib/getlogin_r.c @@ -0,0 +1,88 @@ +/* Provide a working getlogin_r for systems which lack it. + + Copyright (C) 2005-2007, 2010-2011 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Paul Eggert, Derek Price, and Bruno Haible. */ + +#include <config.h> + +/* Specification. */ +#include <unistd.h> + +#include <errno.h> +#include <string.h> + +#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ +# define WIN32_LEAN_AND_MEAN +# include <windows.h> +#else +# if !HAVE_DECL_GETLOGIN +extern char *getlogin (void); +# endif +#endif + +/* See unistd.in.h for documentation. */ +int +getlogin_r (char *name, size_t size) +{ +#undef getlogin_r +#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ + /* Native Windows platform. */ + DWORD sz; + + /* When size > 0x7fff, the doc says that GetUserName will fail. + Actually, on Windows XP SP3, it succeeds. But let's be safe, + for the sake of older Windows versions. */ + if (size > 0x7fff) + size = 0x7fff; + sz = size; + if (!GetUserName (name, &sz)) + { + if (GetLastError () == ERROR_INSUFFICIENT_BUFFER) + /* In this case, the doc says that sz contains the required size, but + actually, on Windows XP SP3, it contains 2 * the required size. */ + return ERANGE; + else + return ENOENT; + } + return 0; +#elif HAVE_GETLOGIN_R + /* Platform with a getlogin_r() function. */ + int ret = getlogin_r (name, size); + + if (ret == 0 && memchr (name, '\0', size) == NULL) + /* name contains a truncated result. */ + return ERANGE; + return ret; +#else + /* Platform with a getlogin() function. */ + char *n; + size_t nlen; + + errno = 0; + n = getlogin (); + if (!n) + /* ENOENT is a reasonable errno value if getlogin returns NULL. */ + return (errno != 0 ? errno : ENOENT); + + nlen = strlen (n); + if (size <= nlen) + return ERANGE; + memcpy (name, n, nlen + 1); + return 0; +#endif +} |