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-rw-r--r--openbsd-compat/setproctitle.c308
1 files changed, 111 insertions, 197 deletions
diff --git a/openbsd-compat/setproctitle.c b/openbsd-compat/setproctitle.c
index 07af7e9c0..b41100fc6 100644
--- a/openbsd-compat/setproctitle.c
+++ b/openbsd-compat/setproctitle.c
@@ -1,41 +1,34 @@
1/* 1/* Based on conf.c from UCB sendmail 8.8.8 */
2 * Based on src/backend/utils/misc/pg_status.c from
3 * PostgreSQL Database Management System
4 *
5 * Portions Copyright (c) 1996-2001, The PostgreSQL Global Development Group
6 *
7 * Portions Copyright (c) 1994, The Regents of the University of California
8 *
9 * Permission to use, copy, modify, and distribute this software and its
10 * documentation for any purpose, without fee, and without a written agreement
11 * is hereby granted, provided that the above copyright notice and this
12 * paragraph and the following two paragraphs appear in all copies.
13 *
14 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
16 * LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
17 * DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE
18 * POSSIBILITY OF SUCH DAMAGE.
19 *
20 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 */
26 2
27/*-------------------------------------------------------------------- 3/*
28 * ps_status.c 4 * Copyright 2003 Damien Miller
29 * 5 * Copyright (c) 1983, 1995-1997 Eric P. Allman
30 * Routines to support changing the ps display of PostgreSQL backends 6 * Copyright (c) 1988, 1993
31 * to contain some useful information. Mechanism differs wildly across 7 * The Regents of the University of California. All rights reserved.
32 * platforms.
33 * 8 *
34 * $Header: /var/cvs/openssh/openbsd-compat/setproctitle.c,v 1.5 2003/01/20 02:15:11 djm Exp $ 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.
35 * 20 *
36 * Copyright 2000 by PostgreSQL Global Development Group 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
37 * various details abducted from various places 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 *-------------------------------------------------------------------- 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.
39 */ 32 */
40 33
41#include "includes.h" 34#include "includes.h"
@@ -44,200 +37,121 @@
44 37
45#include <unistd.h> 38#include <unistd.h>
46#ifdef HAVE_SYS_PSTAT_H 39#ifdef HAVE_SYS_PSTAT_H
47#include <sys/pstat.h> /* for HP-UX */ 40#include <sys/pstat.h>
48#endif
49#ifdef HAVE_PS_STRINGS
50#include <machine/vmparam.h> /* for old BSD */
51#include <sys/exec.h>
52#endif 41#endif
53 42
54/*------ 43#define SPT_NONE 0 /* don't use it at all */
55 * Alternative ways of updating ps display: 44#define SPT_PSTAT 1 /* cover argv with title information */
56 * 45#define SPT_REUSEARGV 2 /* use pstat(PSTAT_SETCMD, ...) */
57 * SETPROCTITLE_STRATEGY == PS_USE_PSTAT
58 * use the pstat(PSTAT_SETCMD, )
59 * (HPUX)
60 * SETPROCTITLE_STRATEGY == PS_USE_PS_STRINGS
61 * assign PS_STRINGS->ps_argvstr = "string"
62 * (some BSD systems)
63 * SETPROCTITLE_STRATEGY == PS_USE_CHANGE_ARGV
64 * assign argv[0] = "string"
65 * (some other BSD systems)
66 * SETPROCTITLE_STRATEGY == PS_USE_CLOBBER_ARGV
67 * write over the argv and environment area
68 * (most SysV-like systems)
69 * SETPROCTITLE_STRATEGY == PS_USE_NONE
70 * don't update ps display
71 * (This is the default, as it is safest.)
72 */
73 46
74#define PS_USE_NONE 0 47#ifndef SPT_TYPE
75#define PS_USE_PSTAT 1 48# define SPT_TYPE SPT_NONE
76#define PS_USE_PS_STRINGS 2
77#define PS_USE_CHANGE_ARGV 3
78#define PS_USE_CLOBBER_ARGV 4
79
80#ifndef SETPROCTITLE_STRATEGY
81# define SETPROCTITLE_STRATEGY PS_USE_NONE
82#endif 49#endif
83 50
84#ifndef SETPROCTITLE_PS_PADDING 51#ifndef SPT_PADCHAR
85# define SETPROCTITLE_PS_PADDING ' ' 52# define SPT_PADCHAR '\0'
86#endif 53#endif
87#endif /* HAVE_SETPROCTITLE */
88 54
89extern char **environ; 55#if SPT_TYPE == SPT_REUSEARGV
90 56static char *argv_start = NULL;
91/* 57static size_t argv_env_len = 0;
92 * argv clobbering uses existing argv space, all other methods need a buffer
93 */
94#if SETPROCTITLE_STRATEGY != PS_USE_CLOBBER_ARGV
95static char ps_buffer[256];
96static const size_t ps_buffer_size = sizeof(ps_buffer);
97#else
98static char *ps_buffer; /* will point to argv area */
99static size_t ps_buffer_size; /* space determined at run time */
100#endif 58#endif
101 59
102/* save the original argv[] location here */ 60#endif /* HAVE_SETPROCTITLE */
103static int save_argc;
104static char **save_argv;
105
106extern char *__progname;
107 61
108#ifndef HAVE_SETPROCTITLE
109/*
110 * Call this to update the ps status display to a fixed prefix plus an
111 * indication of what you're currently doing passed in the argument.
112 */
113void 62void
114setproctitle(const char *fmt, ...) 63compat_init_setproctitle(int argc, char *argv[])
115{ 64{
116#if SETPROCTITLE_STRATEGY == PS_USE_PSTAT 65#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
117 union pstun pst; 66 extern char **environ;
118#endif 67 char *lastargv = NULL;
119#if SETPROCTITLE_STRATEGY != PS_USE_NONE 68 char **envp = environ;
120 ssize_t used; 69 int i;
121 va_list ap;
122
123 /* no ps display if you didn't call save_ps_display_args() */
124 if (save_argv == NULL)
125 return;
126#if SETPROCTITLE_STRATEGY == PS_USE_CLOBBER_ARGV
127 /* If ps_buffer is a pointer, it might still be null */
128 if (ps_buffer == NULL)
129 return;
130#endif /* PS_USE_CLOBBER_ARGV */
131 70
132 /* 71 /*
133 * Overwrite argv[] to point at appropriate space, if needed 72 * NB: This assumes that argv has already been copied out of the
73 * way. This is true for sshd, but may not be true for other
74 * programs. Beware.
134 */ 75 */
135#if SETPROCTITLE_STRATEGY == PS_USE_CHANGE_ARGV
136 save_argv[0] = ps_buffer;
137 save_argv[1] = NULL;
138#endif /* PS_USE_CHANGE_ARGV */
139 76
140#if SETPROCTITLE_STRATEGY == PS_USE_CLOBBER_ARGV 77 if (argc == 0 || argv[0] == NULL)
141 save_argv[1] = NULL; 78 return;
142#endif /* PS_USE_CLOBBER_ARGV */ 79
80 /* Fail if we can't allocate room for the new environment */
81 for (i = 0; envp[i] != NULL; i++)
82 ;
83 if ((environ = malloc(sizeof(*environ) * (i + 1))) == NULL) {
84 environ = envp; /* put it back */
85 return;
86 }
143 87
144 /* 88 /*
145 * Make fixed prefix of ps display. 89 * Find the last argv string or environment variable within
90 * our process memory area.
146 */ 91 */
147 92 for (i = 0; i < argc; i++) {
148 va_start(ap, fmt); 93 if (lastargv == NULL || lastargv + 1 == argv[i])
149 if (fmt == NULL) 94 lastargv = argv[i] + strlen(argv[i]);
150 snprintf(ps_buffer, ps_buffer_size, "%s", __progname); 95 }
151 else { 96 for (i = 0; envp[i] != NULL; i++) {
152 used = snprintf(ps_buffer, ps_buffer_size, "%s: ", __progname); 97 if (lastargv + 1 == envp[i])
153 if (used == -1 || used >= ps_buffer_size) 98 lastargv = envp[i] + strlen(envp[i]);
154 used = ps_buffer_size;
155 vsnprintf(ps_buffer + used, ps_buffer_size - used, fmt, ap);
156 } 99 }
157 va_end(ap);
158
159#if SETPROCTITLE_STRATEGY == PS_USE_PSTAT
160 pst.pst_command = ps_buffer;
161 pstat(PSTAT_SETCMD, pst, strlen(ps_buffer), 0, 0);
162#endif /* PS_USE_PSTAT */
163
164#if SETPROCTITLE_STRATEGY == PS_USE_PS_STRINGS
165 PS_STRINGS->ps_nargvstr = 1;
166 PS_STRINGS->ps_argvstr = ps_buffer;
167#endif /* PS_USE_PS_STRINGS */
168 100
169#if SETPROCTITLE_STRATEGY == PS_USE_CLOBBER_ARGV 101 argv[1] = NULL;
170 /* pad unused memory */ 102 argv_start = argv[0];
171 used = strlen(ps_buffer); 103 argv_env_len = lastargv - argv[0] - 1;
172 memset(ps_buffer + used, SETPROCTITLE_PS_PADDING,
173 ps_buffer_size - used);
174#endif /* PS_USE_CLOBBER_ARGV */
175 104
176#endif /* PS_USE_NONE */ 105 /*
106 * Copy environment
107 * XXX - will truncate env on strdup fail
108 */
109 for (i = 0; envp[i] != NULL; i++)
110 environ[i] = strdup(envp[i]);
111 environ[i] = NULL;
112#endif /* SPT_REUSEARGV */
177} 113}
178 114
179#endif /* HAVE_SETPROCTITLE */ 115#ifndef HAVE_SETPROCTITLE
180
181/*
182 * Call this early in startup to save the original argc/argv values.
183 *
184 * argv[] will not be overwritten by this routine, but may be overwritten
185 * during setproctitle. Also, the physical location of the environment
186 * strings may be moved, so this should be called before any code that
187 * might try to hang onto a getenv() result.
188 */
189void 116void
190compat_init_setproctitle(int argc, char *argv[]) 117setproctitle(const char *fmt, ...)
191{ 118{
192#if SETPROCTITLE_STRATEGY == PS_USE_CLOBBER_ARGV 119#if SPT_TYPE != SPT_NONE
193 char *end_of_area = NULL; 120 va_list ap;
194 char **new_environ; 121 char buf[1024];
195 int i; 122 size_t len;
123 extern char *__progname;
124#if SPT_TYPE == SPT_PSTAT
125 union pstun pst;
196#endif 126#endif
197 127
198 save_argc = argc; 128#if SPT_TYPE == SPT_REUSEARGV
199 save_argv = argv; 129 if (argv_env_len <= 0)
200
201#if SETPROCTITLE_STRATEGY == PS_USE_CLOBBER_ARGV
202 /*
203 * If we're going to overwrite the argv area, count the available
204 * space. Also move the environment to make additional room.
205 */
206
207 /*
208 * check for contiguous argv strings
209 */
210 for (i = 0; i < argc; i++) {
211 if (i == 0 || end_of_area + 1 == argv[i])
212 end_of_area = argv[i] + strlen(argv[i]);
213 }
214
215 /* probably can't happen? */
216 if (end_of_area == NULL) {
217 ps_buffer = NULL;
218 ps_buffer_size = 0;
219 return; 130 return;
220 } 131#endif
221 132
222 /* 133 strlcpy(buf, __progname, sizeof(buf));
223 * check for contiguous environ strings following argv 134
224 */ 135 va_start(ap, fmt);
225 for (i = 0; environ[i] != NULL; i++) { 136 if (fmt != NULL) {
226 if (end_of_area + 1 == environ[i]) 137 len = strlcat(buf, ": ", sizeof(buf));
227 end_of_area = environ[i] + strlen(environ[i]); 138 if (len < sizeof(buf))
139 vsnprintf(buf + len, sizeof(buf) - len , fmt, ap);
228 } 140 }
141 va_end(ap);
229 142
230 ps_buffer = argv[0]; 143#if SPT_TYPE == SPT_PSTAT
231 ps_buffer_size = end_of_area - argv[0] - 1; 144 pst.pst_command = buf;
145 pstat(PSTAT_SETCMD, pst, strlen(buf), 0, 0);
146#elif SPT_TYPE == SPT_REUSEARGV
147/* debug("setproctitle: copy \"%s\" into len %d",
148 buf, argv_env_len); */
149 len = strlcpy(argv_start, buf, argv_env_len);
150 for(; len < argv_env_len; len++)
151 argv_start[len] = SPT_PADCHAR;
152#endif
232 153
233 /* 154#endif /* SPT_NONE */
234 * Duplicate and move the environment out of the way
235 */
236 new_environ = malloc(sizeof(char *) * (i + 1));
237 for (i = 0; environ[i] != NULL; i++)
238 new_environ[i] = strdup(environ[i]);
239 new_environ[i] = NULL;
240 environ = new_environ;
241#endif /* PS_USE_CLOBBER_ARGV */
242} 155}
243 156
157#endif /* HAVE_SETPROCTITLE */