diff options
Diffstat (limited to 'shell_cmds/users/users.c')
| -rw-r--r-- | shell_cmds/users/users.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/shell_cmds/users/users.c b/shell_cmds/users/users.c new file mode 100644 index 0000000..ff24ecb --- /dev/null +++ b/shell_cmds/users/users.c @@ -0,0 +1,123 @@ +/* $NetBSD: users.c,v 1.7 1998/02/03 04:19:15 perry Exp $ */ + +/* + * Copyright (c) 1980, 1987, 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. + */ + +#include <sys/cdefs.h> +#ifndef lint +__COPYRIGHT("@(#) Copyright (c) 1980, 1987, 1993\n\ + The Regents of the University of California. All rights reserved.\n"); +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)users.c 8.1 (Berkeley) 6/6/93"; +#endif +__RCSID("$NetBSD: users.c,v 1.7 1998/02/03 04:19:15 perry Exp $"); +#endif /* not lint */ + +#include <sys/types.h> + +#include <err.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <unistd.h> +#include <utmpx.h> + +typedef char namebuf[_UTX_USERSIZE]; + +int main __P((int, char **)); +int scmp __P((const void *, const void *)); + +int +main(argc, argv) + int argc; + char **argv; +{ + namebuf *names = NULL; + int ncnt = 0; + int nmax = 0; + int cnt; + struct utmpx *ux; + int ch; + + while ((ch = getopt(argc, argv, "")) != -1) + switch(ch) { + case '?': + default: + (void)fprintf(stderr, "usage: users\n"); + exit(1); + } + argc -= optind; + argv += optind; + + setutxent(); + + while ((ux = getutxent()) != NULL) { + if (*ux->ut_user && ux->ut_type == USER_PROCESS) + { + if (ncnt >= nmax) { + nmax += 32; + names = realloc(names, + sizeof (*names) * nmax); + + if (!names) { + err(1, "realloc"); + /* NOTREACHED */ + } + } + + (void)strncpy(names[ncnt], ux->ut_user, _UTX_USERSIZE); + ++ncnt; + } + } + + if (ncnt) { + qsort(names, ncnt, _UTX_USERSIZE, scmp); + (void)printf("%.*s", _UTX_USERSIZE, names[0]); + for (cnt = 1; cnt < ncnt; ++cnt) + if (strncmp(names[cnt], names[cnt - 1], _UTX_USERSIZE)) + (void)printf(" %.*s", _UTX_USERSIZE, names[cnt]); + (void)printf("\n"); + } + exit(0); +} + +int +scmp(p, q) + const void *p, *q; +{ + return(strncmp((char *) p, (char *) q, _UTX_USERSIZE)); +} |