diff options
Diffstat (limited to 'devel/linuxthreads/files/getlogin.c')
| -rw-r--r-- | devel/linuxthreads/files/getlogin.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/devel/linuxthreads/files/getlogin.c b/devel/linuxthreads/files/getlogin.c new file mode 100644 index 000000000000..11bf59bab4ec --- /dev/null +++ b/devel/linuxthreads/files/getlogin.c @@ -0,0 +1,113 @@ +/* + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD: src/lib/libc/gen/getlogin.c,v 1.4.2.1 2001/03/05 09:06:50 obrien Exp $ + */ + +#if __FreeBSD__ < 5 +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)getlogin.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/param.h> +#include <errno.h> +#include <pwd.h> +#include <utmp.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#ifndef _THREAD_SAFE +#define THREAD_LOCK() +#define THREAD_UNLOCK() +#else +#include <pthread.h> +extern int __isthreaded; +static pthread_mutex_t logname_mutex = PTHREAD_MUTEX_INITIALIZER; +#define THREAD_LOCK() if (__isthreaded) pthread_mutex_lock(&logname_mutex) +#define THREAD_UNLOCK() if (__isthreaded) pthread_mutex_unlock(&logname_mutex) +#endif /* _THREAD_SAFE */ + +int _logname_valid; /* known to setlogin() */ +int _getlogin(char *, unsigned int); + +static char * +getlogin_basic(int *status) +{ + static char logname[MAXLOGNAME]; + + if (_logname_valid == 0) { +#ifdef __NETBSD_SYSCALLS + if (__getlogin(logname, sizeof(logname) - 1) < 0) { +#else + if (_getlogin(logname, sizeof(logname)) < 0) { +#endif + *status = errno; + return (NULL); + } + _logname_valid = 1; + } + *status = 0; + return (*logname ? logname : NULL); +} + +char * +getlogin(void) +{ + char *result; + int status; + + THREAD_LOCK(); + result = getlogin_basic(&status); + THREAD_UNLOCK(); + return (result); +} + +int +getlogin_r(char *logname, int namelen) +{ + char *result; + int len; + int status; + + THREAD_LOCK(); + result = getlogin_basic(&status); + if (status == 0) { + if ((len = strlen(result) + 1) > namelen) + status = ERANGE; + else + strncpy(logname, result, len); + } + THREAD_UNLOCK(); + return (status); +} +#endif /* __FreeBSD__ < 5 */ |