1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
411 lines
8.5 KiB
C
411 lines
8.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2004 Dag-Erling Coïdan Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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struct xpasswd {
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char *pw_name;
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char *pw_passwd;
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uid_t pw_uid;
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gid_t pw_gid;
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time_t pw_change;
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char *pw_class;
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char *pw_gecos;
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char *pw_dir;
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char *pw_shell;
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time_t pw_expire;
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int pw_selected;
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};
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struct xgroup {
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char *gr_name;
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char *gr_passwd;
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gid_t gr_gid;
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char *gr_mem;
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};
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static int everything = 1;
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static int a_flag;
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static int d_flag;
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static const char *g_args;
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static const char *l_args;
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static int m_flag;
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static int o_flag;
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static int p_flag;
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static int s_flag;
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static int t_flag;
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static int u_flag;
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static int x_flag;
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static int
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member(const char *elem, const char *list)
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{
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char *p;
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int len;
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p = strstr(list, elem);
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len = strlen(elem);
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return (p != NULL &&
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(p == list || p[-1] == ',') &&
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(p[len] == '\0' || p[len] == ','));
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}
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static void *
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xmalloc(size_t size)
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{
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void *newptr;
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if ((newptr = malloc(size)) == NULL)
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err(1, "malloc()");
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return (newptr);
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}
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static void *
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xrealloc(void *ptr, size_t size)
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{
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void *newptr;
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if ((newptr = realloc(ptr, size)) == NULL)
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err(1, "realloc()");
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return (newptr);
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}
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static char *
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xstrdup(const char *str)
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{
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char *dupstr;
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if ((dupstr = strdup(str)) == NULL)
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err(1, "strdup()");
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return (dupstr);
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}
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static struct xgroup *grps;
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static size_t grpsz;
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static size_t ngrps;
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static void
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get_groups(void)
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{
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struct group *grp;
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size_t len;
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int i;
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setgrent();
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for (;;) {
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if (ngrps == grpsz) {
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grpsz += grpsz ? grpsz : 128;
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grps = xrealloc(grps, grpsz * sizeof *grps);
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}
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if ((grp = getgrent()) == NULL)
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break;
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grps[ngrps].gr_name = xstrdup(grp->gr_name);
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grps[ngrps].gr_passwd = xstrdup(grp->gr_passwd);
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grps[ngrps].gr_gid = grp->gr_gid;
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grps[ngrps].gr_mem = xstrdup("");
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for (i = 0, len = 1; grp->gr_mem[i] != NULL; ++i)
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len += strlen(grp->gr_mem[i]) + 1;
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grps[ngrps].gr_mem = xmalloc(len);
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for (i = 0, len = 0; grp->gr_mem[i] != NULL; ++i)
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len += sprintf(grps[ngrps].gr_mem + len,
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i ? ",%s" : "%s", grp->gr_mem[i]);
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grps[ngrps].gr_mem[len] = '\0';
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ngrps++;
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}
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endgrent();
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}
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static struct xgroup *
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find_group_bygid(gid_t gid)
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{
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unsigned int i;
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for (i = 0; i < ngrps; ++i)
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if (grps[i].gr_gid == gid)
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return (&grps[i]);
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return (NULL);
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}
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#if 0
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static struct xgroup *
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find_group_byname(const char *name)
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{
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unsigned int i;
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for (i = 0; i < ngrps; ++i)
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if (strcmp(grps[i].gr_name, name) == 0)
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return (&grps[i]);
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return (NULL);
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}
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#endif
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static struct xpasswd *pwds;
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static size_t pwdsz;
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static size_t npwds;
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static int
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pwd_cmp_byname(const void *ap, const void *bp)
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{
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const struct passwd *a = ap;
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const struct passwd *b = bp;
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return (strcmp(a->pw_name, b->pw_name));
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}
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static int
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pwd_cmp_byuid(const void *ap, const void *bp)
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{
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const struct passwd *a = ap;
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const struct passwd *b = bp;
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return (a->pw_uid - b->pw_uid);
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}
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static void
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get_users(void)
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{
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struct passwd *pwd;
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setpwent();
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for (;;) {
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if (npwds == pwdsz) {
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pwdsz += pwdsz ? pwdsz : 128;
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pwds = xrealloc(pwds, pwdsz * sizeof *pwds);
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}
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if ((pwd = getpwent()) == NULL)
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break;
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pwds[npwds].pw_name = xstrdup(pwd->pw_name);
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pwds[npwds].pw_passwd = xstrdup(pwd->pw_passwd);
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pwds[npwds].pw_uid = pwd->pw_uid;
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pwds[npwds].pw_gid = pwd->pw_gid;
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pwds[npwds].pw_change = pwd->pw_change;
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pwds[npwds].pw_class = xstrdup(pwd->pw_class);
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pwds[npwds].pw_gecos = xstrdup(pwd->pw_gecos);
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pwds[npwds].pw_dir = xstrdup(pwd->pw_dir);
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pwds[npwds].pw_shell = xstrdup(pwd->pw_shell);
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pwds[npwds].pw_expire = pwd->pw_expire;
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pwds[npwds].pw_selected = 0;
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npwds++;
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}
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endpwent();
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}
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static void
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select_users(void)
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{
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unsigned int i, j;
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struct xgroup *grp;
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struct xpasswd *pwd;
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for (i = 0, pwd = pwds; i < npwds; ++i, ++pwd) {
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if (everything) {
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pwd->pw_selected = 1;
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continue;
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}
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if (d_flag)
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if ((i > 0 && pwd->pw_uid == pwd[-1].pw_uid) ||
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(i < npwds - 1 && pwd->pw_uid == pwd[1].pw_uid)) {
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pwd->pw_selected = 1;
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continue;
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}
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if (g_args) {
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for (j = 0, grp = grps; j < ngrps; ++j, ++grp) {
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if (member(grp->gr_name, g_args) &&
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member(pwd->pw_name, grp->gr_mem)) {
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pwd->pw_selected = 1;
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break;
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}
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}
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if (pwd->pw_selected)
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continue;
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}
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if (l_args)
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if (member(pwd->pw_name, l_args)) {
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pwd->pw_selected = 1;
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continue;
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}
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if (p_flag)
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if (pwd->pw_passwd[0] == '\0') {
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pwd->pw_selected = 1;
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continue;
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}
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if (s_flag)
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if (pwd->pw_uid < 1000 || pwd->pw_uid == 65534) {
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pwd->pw_selected = 1;
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continue;
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}
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if (u_flag)
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if (pwd->pw_uid >= 1000 && pwd->pw_uid != 65534) {
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pwd->pw_selected = 1;
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continue;
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}
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}
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}
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static void
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sort_users(void)
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{
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if (t_flag)
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mergesort(pwds, npwds, sizeof *pwds, pwd_cmp_byname);
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else
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mergesort(pwds, npwds, sizeof *pwds, pwd_cmp_byuid);
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}
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static void
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display_user(struct xpasswd *pwd)
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{
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struct xgroup *grp;
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unsigned int i;
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char cbuf[16], ebuf[16];
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struct tm *tm;
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grp = find_group_bygid(pwd->pw_gid);
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printf(o_flag ? "%s:%ld:%s:%ld:%s" : "%-15s %-7ld %-15s %-7ld %s\n",
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pwd->pw_name, (long)pwd->pw_uid, grp ? grp->gr_name : "",
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(long)pwd->pw_gid, pwd->pw_gecos);
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if (m_flag) {
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for (i = 0, grp = grps; i < ngrps; ++i, ++grp) {
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if (grp->gr_gid == pwd->pw_gid ||
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!member(pwd->pw_name, grp->gr_mem))
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continue;
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printf(o_flag ? "%s:%s:%ld" : "%24s%-15s %-7ld\n",
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"", grp->gr_name, (long)grp->gr_gid);
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}
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}
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if (x_flag) {
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printf(o_flag ? "%s:%s" : "%24s%s\n", "", pwd->pw_dir);
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printf(o_flag ? "%s:%s" : "%24s%s\n", "", pwd->pw_shell);
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}
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if (a_flag) {
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tm = gmtime(&pwd->pw_change);
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strftime(cbuf, sizeof(cbuf), pwd->pw_change ? "%F" : "0", tm);
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tm = gmtime(&pwd->pw_expire);
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strftime(ebuf, sizeof(ebuf), pwd->pw_expire ? "%F" : "0", tm);
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printf(o_flag ? "%s:%s:%s" : "%24s%s %s\n", "", cbuf, ebuf);
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}
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if (o_flag)
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printf("\n");
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}
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static void
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list_users(void)
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{
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struct xpasswd *pwd;
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unsigned int i;
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for (i = 0, pwd = pwds; i < npwds; ++i, ++pwd)
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if (pwd->pw_selected)
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display_user(pwd);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: logins [-admopstux] [-g group] [-l login]\n");
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exit(1);
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}
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int
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main(int argc, char * const argv[])
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{
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int o;
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while ((o = getopt(argc, argv, "adg:l:mopstux")) != -1)
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switch (o) {
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case 'a':
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a_flag = 1;
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break;
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case 'd':
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everything = 0;
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d_flag = 1;
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break;
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case 'g':
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everything = 0;
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g_args = optarg;
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break;
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case 'l':
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everything = 0;
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l_args = optarg;
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break;
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case 'm':
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m_flag = 1;
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break;
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case 'o':
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o_flag = 1;
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break;
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case 'p':
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everything = 0;
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p_flag = 1;
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break;
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case 's':
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everything = 0;
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s_flag = 1;
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break;
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case 't':
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t_flag = 1;
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break;
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case 'u':
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everything = 0;
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u_flag = 1;
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break;
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case 'x':
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x_flag = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc > 0)
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usage();
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get_groups();
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get_users();
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select_users();
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sort_users();
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list_users();
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exit(0);
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}
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