1 /* Based on conf.c from UCB sendmail 8.8.8 */
2
3 /*
4 * Copyright 2003 Damien Miller
5 * Copyright (c) 1983, 1995-1997 Eric P. Allman
6 * Copyright (c) 1988, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "includes.h"
35
36 #ifndef HAVE_SETPROCTITLE
37
38 #include <stdarg.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <unistd.h>
42 #ifdef HAVE_SYS_PSTAT_H
43 #include <sys/pstat.h>
44 #endif
45 #include <string.h>
46
47 #include <vis.h>
48
49 #define SPT_NONE 0 /* don't use it at all */
50 #define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */
51 #define SPT_REUSEARGV 2 /* cover argv with title information */
52
53 #ifndef SPT_TYPE
54 # define SPT_TYPE SPT_NONE
55 #endif
56
57 #ifndef SPT_PADCHAR
58 # define SPT_PADCHAR '\0'
59 #endif
60
61 #if SPT_TYPE == SPT_REUSEARGV
62 static char *argv_start = NULL;
63 static size_t argv_env_len = 0;
64 #endif
65
66 #endif /* HAVE_SETPROCTITLE */
67
68 void
compat_init_setproctitle(int argc,char * argv[])69 compat_init_setproctitle(int argc, char *argv[])
70 {
71 #if !defined(HAVE_SETPROCTITLE) && \
72 defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
73 extern char **environ;
74 char *lastargv = NULL;
75 char **envp = environ;
76 int i;
77
78 /*
79 * NB: This assumes that argv has already been copied out of the
80 * way. This is true for sshd, but may not be true for other
81 * programs. Beware.
82 */
83
84 if (argc == 0 || argv[0] == NULL)
85 return;
86
87 /* Fail if we can't allocate room for the new environment */
88 for (i = 0; envp[i] != NULL; i++)
89 ;
90 if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) {
91 environ = envp; /* put it back */
92 return;
93 }
94
95 /*
96 * Find the last argv string or environment variable within
97 * our process memory area.
98 */
99 for (i = 0; i < argc; i++) {
100 if (lastargv == NULL || lastargv + 1 == argv[i])
101 lastargv = argv[i] + strlen(argv[i]);
102 }
103 for (i = 0; envp[i] != NULL; i++) {
104 if (lastargv + 1 == envp[i])
105 lastargv = envp[i] + strlen(envp[i]);
106 }
107
108 argv[1] = NULL;
109 argv_start = argv[0];
110 argv_env_len = lastargv - argv[0] - 1;
111
112 /*
113 * Copy environment
114 * XXX - will truncate env on strdup fail
115 */
116 for (i = 0; envp[i] != NULL; i++)
117 environ[i] = strdup(envp[i]);
118 environ[i] = NULL;
119 #endif /* SPT_REUSEARGV */
120 }
121
122 #ifndef HAVE_SETPROCTITLE
123 void
setproctitle(const char * fmt,...)124 setproctitle(const char *fmt, ...)
125 {
126 #if SPT_TYPE != SPT_NONE
127 va_list ap;
128 char buf[1024], ptitle[1024];
129 size_t len = 0;
130 int r;
131 extern char *__progname;
132 #if SPT_TYPE == SPT_PSTAT
133 union pstun pst;
134 #endif
135
136 #if SPT_TYPE == SPT_REUSEARGV
137 if (argv_env_len <= 0)
138 return;
139 #endif
140
141 strlcpy(buf, __progname, sizeof(buf));
142
143 r = -1;
144 va_start(ap, fmt);
145 if (fmt != NULL) {
146 len = strlcat(buf, ": ", sizeof(buf));
147 if (len < sizeof(buf))
148 r = vsnprintf(buf + len, sizeof(buf) - len , fmt, ap);
149 }
150 va_end(ap);
151 if (r == -1 || (size_t)r >= sizeof(buf) - len)
152 return;
153 strnvis(ptitle, buf, sizeof(ptitle),
154 VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL);
155
156 #if SPT_TYPE == SPT_PSTAT
157 pst.pst_command = ptitle;
158 pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0);
159 #elif SPT_TYPE == SPT_REUSEARGV
160 /* debug("setproctitle: copy \"%s\" into len %d",
161 buf, argv_env_len); */
162 len = strlcpy(argv_start, ptitle, argv_env_len);
163 for(; len < argv_env_len; len++)
164 argv_start[len] = SPT_PADCHAR;
165 #endif
166
167 #endif /* SPT_NONE */
168 }
169
170 #endif /* HAVE_SETPROCTITLE */
171