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| author | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
|---|---|---|
| committer | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
| commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
| tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /adv_cmds/finger/finger.c | |
| download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip | |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'adv_cmds/finger/finger.c')
| -rw-r--r-- | adv_cmds/finger/finger.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/adv_cmds/finger/finger.c b/adv_cmds/finger/finger.c new file mode 100644 index 0000000..0cbb887 --- /dev/null +++ b/adv_cmds/finger/finger.c @@ -0,0 +1,416 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Tony Nardo of the Johns Hopkins University/Applied Physics Lab. + * + * 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. + */ + +/* + * Luke Mewburn <lm@rmit.edu.au> added the following on 940622: + * - mail status ("No Mail", "Mail read:...", or "New Mail ..., + * Unread since ...".) + * - 4 digit phone extensions (3210 is printed as x3210.) + * - host/office toggling in short format with -h & -o. + * - short day names (`Tue' printed instead of `Jun 21' if the + * login time is < 6 days. + */ + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95"; +#endif +#endif + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/finger/finger.c,v 1.36 2005/09/19 10:11:46 dds Exp $"); + +/* + * Finger prints out information about users. It is not portable since + * certain fields (e.g. the full user name, office, and phone numbers) are + * extracted from the gecos field of the passwd file which other UNIXes + * may not have or may use for other things. + * + * There are currently two output formats; the short format is one line + * per user and displays login name, tty, login time, real name, idle time, + * and either remote host information (default) or office location/phone + * number, depending on if -h or -o is used respectively. + * The long format gives the same information (in a more legible format) as + * well as home directory, shell, mail info, and .plan/.project files. + */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <db.h> +#include <err.h> +#include <pwd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> +#include <utmpx.h> +#include <locale.h> + +#include "finger.h" +#include "pathnames.h" + +DB *db; +time_t now; +int entries, gflag, kflag, lflag, mflag, pplan, sflag, oflag, Tflag; +sa_family_t family = PF_UNSPEC; +int d_first = -1; +char tbuf[1024]; +int invoker_root = 0; + +static void loginlist(void); +static int option(int, char **); +static void usage(void); +static void userlist(int, char **); + +static int +option(int argc, char **argv) +{ + int ch; + + optind = 1; /* reset getopt */ + +#ifdef __APPLE__ + while ((ch = getopt(argc, argv, "46gklmpsho")) != -1) +#else + while ((ch = getopt(argc, argv, "46gklmpshoT")) != -1) +#endif + switch(ch) { + case '4': + family = AF_INET; + break; + case '6': + family = AF_INET6; + break; + case 'g': + gflag = 1; + break; + case 'k': + kflag = 1; /* keep going without utmpx */ + break; + case 'l': + lflag = 1; /* long format */ + break; + case 'm': + mflag = 1; /* force exact match of names */ + break; + case 'p': + pplan = 1; /* don't show .plan/.project */ + break; + case 's': + sflag = 1; /* short format */ + break; + case 'h': + oflag = 0; /* remote host info */ + break; + case 'o': + oflag = 1; /* office info */ + break; +#ifndef __APPLE__ + case 'T': + Tflag = 1; /* disable T/TCP */ + break; +#endif + case '?': + default: + usage(); + } + + return optind; +} + +static void +usage(void) +{ + (void)fprintf(stderr, + "usage: finger [-46gklmpshoT] [user ...] [user@host ...]\n"); + exit(1); +} + +int +main(int argc, char **argv) +{ + int envargc, argcnt; + char *envargv[3]; + struct passwd *pw; + static char myname[] = "finger"; + + if (getuid() == 0 || geteuid() == 0) { + invoker_root = 1; + if ((pw = getpwnam(UNPRIV_NAME)) && pw->pw_uid > 0) { + setgid(pw->pw_gid); + setuid(pw->pw_uid); + } else { + setgid(UNPRIV_UGID); + setuid(UNPRIV_UGID); + } + } + + (void) setlocale(LC_ALL, ""); + + /* remove this line to get remote host */ + oflag = 1; /* default to old "office" behavior */ + + /* + * Process environment variables followed by command line arguments. + */ + if ((envargv[1] = getenv("FINGER"))) { + envargc = 2; + envargv[0] = myname; + envargv[2] = NULL; + (void) option(envargc, envargv); + } + + argcnt = option(argc, argv); + argc -= argcnt; + argv += argcnt; + + (void)time(&now); + setpassent(1); + if (!*argv) { + /* + * Assign explicit "small" format if no names given and -l + * not selected. Force the -s BEFORE we get names so proper + * screening will be done. + */ + if (!lflag) + sflag = 1; /* if -l not explicit, force -s */ + loginlist(); + if (entries == 0) + (void)printf("No one logged on.\n"); + } else { + userlist(argc, argv); + /* + * Assign explicit "large" format if names given and -s not + * explicitly stated. Force the -l AFTER we get names so any + * remote finger attempts specified won't be mishandled. + */ + if (!sflag) + lflag = 1; /* if -s not explicit, force -l */ + } + if (entries) { + if (lflag) + lflag_print(); + else + sflag_print(); + } + return (0); +} + +static void +loginlist(void) +{ + PERSON *pn; + DBT data, key; + struct passwd *pw; + struct utmpx *user; + int r, sflag1; + char name[_UTX_USERSIZE + 1]; + + if (kflag) + errx(1, "can't list logins without reading utmpx"); + + setutxent(); + name[_UTX_USERSIZE] = '\0'; + while ((user = getutxent()) != NULL) { + if (!user->ut_user[0] || user->ut_type != USER_PROCESS) + continue; + if ((pn = find_person(user->ut_user)) == NULL) { + bcopy(user->ut_user, name, _UTX_USERSIZE); + if ((pw = getpwnam(name)) == NULL) + continue; + if (hide(pw)) + continue; + pn = enter_person(pw); + } + enter_where(user, pn); + } + endutxent(); + if (db && lflag) + for (sflag1 = R_FIRST;; sflag1 = R_NEXT) { + PERSON *tmp; + + r = (*db->seq)(db, &key, &data, sflag1); + if (r == -1) + err(1, "db seq"); + if (r == 1) + break; + memmove(&tmp, data.data, sizeof tmp); + enter_lastlog(tmp); + } +} + +static void +userlist(int argc, char **argv) +{ + PERSON *pn; + DBT data, key; + struct utmpx *user; + struct passwd *pw; + int r, sflag1, *used, *ip; + char **ap, **nargv, **np, **p; + FILE *conf_fp; + char conf_alias[LINE_MAX]; + char *conf_realname; + int conf_length; + + if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || + (used = calloc(argc, sizeof(int))) == NULL) + err(1, NULL); + + /* Pull out all network requests. */ + for (ap = p = argv, np = nargv; *p; ++p) + if (index(*p, '@')) + *np++ = *p; + else + *ap++ = *p; + + *np++ = NULL; + *ap++ = NULL; + + if (!*argv) + goto net; + + /* + * Mark any arguments beginning with '/' as invalid so that we + * don't accidently confuse them with expansions from finger.conf + */ + for (p = argv, ip = used; *p; ++p, ++ip) + if (**p == '/') { + *ip = 1; + warnx("%s: no such user", *p); + } + + /* + * Traverse the finger alias configuration file of the form + * alias:(user|alias), ignoring comment lines beginning '#'. + */ + if ((conf_fp = fopen(_PATH_FINGERCONF, "r")) != NULL) { + while(fgets(conf_alias, sizeof(conf_alias), conf_fp) != NULL) { + conf_length = strlen(conf_alias); + if (*conf_alias == '#' || conf_alias[--conf_length] != '\n') + continue; + conf_alias[conf_length] = '\0'; /* Remove trailing LF */ + if ((conf_realname = strchr(conf_alias, ':')) == NULL) + continue; + *conf_realname = '\0'; /* Replace : with NUL */ + for (p = argv; *p; ++p) { + if (strcmp(*p, conf_alias) == 0) { + if ((*p = strdup(conf_realname+1)) == NULL) { + err(1, NULL); + } + } + } + } + (void)fclose(conf_fp); + } + + /* + * Traverse the list of possible login names and check the login name + * and real name against the name specified by the user. If the name + * begins with a '/', try to read the file of that name instead of + * gathering the traditional finger information. + */ + if (mflag) + for (p = argv, ip = used; *p; ++p, ++ip) { + if (**p != '/' || *ip == 1 || !show_text("", *p, "")) { + if (((pw = getpwnam(*p)) != NULL) && !hide(pw)) + enter_person(pw); + else if (!*ip) + warnx("%s: no such user", *p); + } + } + else { + while ((pw = getpwent()) != NULL) { + for (p = argv, ip = used; *p; ++p, ++ip) + if (**p == '/' && *ip != 1 + && show_text("", *p, "")) + *ip = 1; + else if (match(pw, *p) && !hide(pw)) { + enter_person(pw); + *ip = 1; + } + } + for (p = argv, ip = used; *p; ++p, ++ip) + if (!*ip) + warnx("%s: no such user", *p); + } + + /* Handle network requests. */ +net: for (p = nargv; *p;) { + netfinger(*p++); + if (*p || entries) + printf("\n"); + } + + if (entries == 0) + return; + + if (kflag) + return; + + /* + * Scan thru the list of users currently logged in, saving + * appropriate data whenever a match occurs. + */ + setutxent(); + while ((user = getutxent()) != NULL) { + if (!user->ut_user && user->ut_type != USER_PROCESS) + continue; + if ((pn = find_person(user->ut_user)) == NULL) + continue; + enter_where(user, pn); + } + endutxent(); + if (db) + for (sflag1 = R_FIRST;; sflag1 = R_NEXT) { + PERSON *tmp; + + r = (*db->seq)(db, &key, &data, sflag1); + if (r == -1) + err(1, "db seq"); + if (r == 1) + break; + memmove(&tmp, data.data, sizeof tmp); + enter_lastlog(tmp); + } +} |
