wall.c (56e7ae90cb45f7803a1821b1fd3178a04a99bdf3) wall.c (6a20d55a591484ce93ad7002606c9ca4dbbd7ebb)
1/*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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51 */
52
53#include <sys/param.h>
54#include <sys/stat.h>
55#include <sys/uio.h>
56
57#include <ctype.h>
58#include <err.h>
1/*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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51 */
52
53#include <sys/param.h>
54#include <sys/stat.h>
55#include <sys/uio.h>
56
57#include <ctype.h>
58#include <err.h>
59#include <grp.h>
59#include <locale.h>
60#include <paths.h>
61#include <pwd.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <time.h>
66#include <unistd.h>
67#include <utmp.h>
68
60#include <locale.h>
61#include <paths.h>
62#include <pwd.h>
63#include <stdio.h>
64#include <stdlib.h>
65#include <string.h>
66#include <time.h>
67#include <unistd.h>
68#include <utmp.h>
69
69void makemsg __P((char *));
70static void usage __P((void));
71char *ttymsg __P((struct iovec *, int, char *, int));
70static void makemsg(char *);
71static void usage(void);
72char *ttymsg(struct iovec *, int, const char *, int);
72
73#define IGNOREUSER "sleeper"
74
73
74#define IGNOREUSER "sleeper"
75
76struct wallgroup {
77 struct wallgroup *next;
78 char *name;
79 gid_t gid;
80} *grouplist;
75int nobanner;
76int mbufsize;
77char *mbuf;
78
81int nobanner;
82int mbufsize;
83char *mbuf;
84
79/* ARGSUSED */
80int
85int
81main(argc, argv)
82 int argc;
83 char **argv;
86main(int argc, char *argv[])
84{
87{
85 int ch;
86 struct iovec iov;
87 struct utmp utmp;
88 struct iovec iov;
89 struct utmp utmp;
90 gid_t grps[NGROUPS_MAX];
91 int ch;
92 int ingroup, ngrps, i;
88 FILE *fp;
93 FILE *fp;
94 struct wallgroup *g;
95 struct group *grp;
89 char *p;
96 char *p;
97 struct passwd *pw;
90 char line[sizeof(utmp.ut_line) + 1];
98 char line[sizeof(utmp.ut_line) + 1];
99 char username[sizeof(utmp.ut_name) + 1];
91
100
101 ingroup = 0;
92 (void)setlocale(LC_CTYPE, "");
93
102 (void)setlocale(LC_CTYPE, "");
103
94 while ((ch = getopt(argc, argv, "n")) != -1)
104 while ((ch = getopt(argc, argv, "g:n")) != -1)
95 switch (ch) {
96 case 'n':
97 /* undoc option for shutdown: suppress banner */
98 if (geteuid() == 0)
99 nobanner = 1;
100 break;
105 switch (ch) {
106 case 'n':
107 /* undoc option for shutdown: suppress banner */
108 if (geteuid() == 0)
109 nobanner = 1;
110 break;
111 case 'g':
112 g = (struct wallgroup *)malloc(sizeof *g);
113 g->next = grouplist;
114 g->name = optarg;
115 g->gid = -1;
116 grouplist = g;
117 break;
101 case '?':
102 default:
103 usage();
104 }
105 argc -= optind;
106 argv += optind;
107 if (argc > 1)
108 usage();
109
118 case '?':
119 default:
120 usage();
121 }
122 argc -= optind;
123 argv += optind;
124 if (argc > 1)
125 usage();
126
127 for (g = grouplist; g; g = g->next) {
128 grp = getgrnam(g->name);
129 if (grp)
130 g->gid = grp->gr_gid;
131 }
132
110 makemsg(*argv);
111
112 if (!(fp = fopen(_PATH_UTMP, "r")))
113 err(1, "cannot read %s", _PATH_UTMP);
114 iov.iov_base = mbuf;
115 iov.iov_len = mbufsize;
116 /* NOSTRICT */
117 while (fread((char *)&utmp, sizeof(utmp), 1, fp) == 1) {
118 if (!utmp.ut_name[0] ||
119 !strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name)))
120 continue;
133 makemsg(*argv);
134
135 if (!(fp = fopen(_PATH_UTMP, "r")))
136 err(1, "cannot read %s", _PATH_UTMP);
137 iov.iov_base = mbuf;
138 iov.iov_len = mbufsize;
139 /* NOSTRICT */
140 while (fread((char *)&utmp, sizeof(utmp), 1, fp) == 1) {
141 if (!utmp.ut_name[0] ||
142 !strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name)))
143 continue;
144 if (grouplist) {
145 strlcpy(username, utmp.ut_name, sizeof(utmp.ut_name));
146 pw = getpwnam(username);
147 if (!pw)
148 continue;
149 ngrps = getgroups(pw->pw_gid, grps);
150 for (g = grouplist; g && ingroup == 0; g = g->next) {
151 if (g->gid == -1)
152 continue;
153 if (g->gid == pw->pw_gid)
154 ingroup = 1;
155 for (i = 0; i < ngrps && ingroup == 0; i++)
156 if (g->gid == grps[i])
157 ingroup = 1;
158 }
159 if (ingroup == 0)
160 continue;
161 }
121 strncpy(line, utmp.ut_line, sizeof(utmp.ut_line));
122 line[sizeof(utmp.ut_line)] = '\0';
123 if ((p = ttymsg(&iov, 1, line, 60*5)) != NULL)
124 warnx("%s", p);
125 }
126 exit(0);
127}
128
129static void
130usage()
131{
132 (void)fprintf(stderr, "usage: wall [file]\n");
133 exit(1);
134}
135
136void
162 strncpy(line, utmp.ut_line, sizeof(utmp.ut_line));
163 line[sizeof(utmp.ut_line)] = '\0';
164 if ((p = ttymsg(&iov, 1, line, 60*5)) != NULL)
165 warnx("%s", p);
166 }
167 exit(0);
168}
169
170static void
171usage()
172{
173 (void)fprintf(stderr, "usage: wall [file]\n");
174 exit(1);
175}
176
177void
137makemsg(fname)
138 char *fname;
178makemsg(char *fname)
139{
179{
140 register int cnt;
141 register unsigned char ch;
180 int cnt;
181 unsigned char ch;
142 struct tm *lt;
143 struct passwd *pw;
144 struct stat sbuf;
145 time_t now;
146 FILE *fp;
147 int fd;
148 char *p, *tty, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
149 const char *whom;

--- 94 unchanged lines hidden --- 		182 struct tm *lt;
183 struct passwd *pw;
184 struct stat sbuf;
185 time_t now;
186 FILE *fp;
187 int fd;
188 char *p, *tty, hostname[MAXHOSTNAMELEN], lbuf[256], tmpname[64];
189 const char *whom;

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