Ruby: missing/setproctitle.c Source File

Ruby 3.3.4p94 (2024-07-09 revision be1089c8ec5ba40e09b1553e36b3174bf4014d9d)

setproctitle.c
1/* Based on setproctitle.c from openssh-5.6p1 */
2/* Based on conf.c from UCB sendmail 8.8.8 */
3
4/*
5 * Copyright 2003 Damien Miller
6 * Copyright (c) 1983, 1995-1997 Eric P. Allman
7 * Copyright (c) 1988, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include "ruby.h"
36#include "ruby/util.h"
37#define compat_init_setproctitle ruby_init_setproctitle
38RUBY_FUNC_EXPORTED void ruby_init_setproctitle(int argc, char *argv[]);
39
40#ifndef HAVE_SETPROCTITLE
41
42#include <stdarg.h>
43#include <stdlib.h>
44#ifdef HAVE_UNISTD_H
45#include <unistd.h>
46#endif
47#ifdef HAVE_SYS_PSTAT_H
48#include <sys/pstat.h>
49#endif
50#include <string.h>
51
52#if defined(__APPLE__)
53# ifdef HAVE_CRT_EXTERNS_H
54# include <crt_externs.h>
55# undef environ
56# define environ (*_NSGetEnviron())
57# else
58# include "crt_externs.h"
59# endif
60#endif
61
62#define SPT_NONE 0 /* don't use it at all */
63#define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */
64#define SPT_REUSEARGV 2 /* cover argv with title information */
65
66#ifndef SPT_TYPE
67# define SPT_TYPE SPT_NONE
68#endif
69
70#ifndef SPT_PADCHAR
71# define SPT_PADCHAR '\0'
72#endif
73
74#if SPT_TYPE == SPT_REUSEARGV
75static char *argv_start = NULL;
76static size_t argv_env_len = 0;
77static size_t argv_len = 0;
78static char **argv1_addr = NULL;
79#endif
80
81#endif /* HAVE_SETPROCTITLE */
82
83void
84compat_init_setproctitle(int argc, char *argv[])
85{
86#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
87 extern char **environ;
88 char *lastargv = NULL;
89 char *lastenvp = NULL;
90 char **envp = environ;
91 int i;
92
93 /*
94 * NB: This assumes that argv has already been copied out of the
95 * way. This is true for sshd, but may not be true for other
96 * programs. Beware.
97 */
98
99 if (argc == 0 || argv[0] == NULL)
100 return;
101
102 /* Fail if we can't allocate room for the new environment */
103 for (i = 0; envp[i] != NULL; i++)
104 ;
105 if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) {
106 environ = envp; /* put it back */
107 return;
108 }
109
110 /*
111 * Find the last argv string or environment variable within
112 * our process memory area.
113 */
114 for (i = 0; i < argc; i++) {
115 if (lastargv == NULL || lastargv + 1 == argv[i])
116 lastargv = argv[i] + strlen(argv[i]);
117 }
118 lastenvp = lastargv;
119 for (i = 0; envp[i] != NULL; i++) {
120 if (lastenvp + 1 == envp[i])
121 lastenvp = envp[i] + strlen(envp[i]);
122 }
123
124 /* We keep argv[1], argv[2], etc. at this moment,
125 because the ps command of AIX refers to them. */
126 argv1_addr = &argv[1];
127 argv_start = argv[0];
128 argv_len = lastargv - argv[0];
129 argv_env_len = lastenvp - argv[0];
130
131 for (i = 0; envp[i] != NULL; i++)
132 environ[i] = ruby_strdup(envp[i]);
133 environ[i] = NULL;
134#endif /* SPT_REUSEARGV */
135}
136
137#ifndef HAVE_SETPROCTITLE
138
139void
140setproctitle(const char *fmt, ...)
141{
142#if SPT_TYPE != SPT_NONE
143 va_list ap;
144 char ptitle[1024];
145 size_t len;
146 size_t argvlen;
147#if SPT_TYPE == SPT_PSTAT
148 union pstun pst;
149#endif
150
151#if SPT_TYPE == SPT_REUSEARGV
152 if (argv_env_len <= 0)
153 return;
154#endif
155
156 /* fmt must be non-NULL */
157 va_start(ap, fmt);
158 vsnprintf(ptitle, sizeof(ptitle), fmt, ap);
159 va_end(ap);
160
161#if SPT_TYPE == SPT_PSTAT
162 pst.pst_command = ptitle;
163 pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0);
164#elif SPT_TYPE == SPT_REUSEARGV
165 len = strlcpy(argv_start, ptitle, argv_env_len);
166 argvlen = len > argv_len ? argv_env_len : argv_len;
167 for(; len < argvlen; len++)
168 argv_start[len] = SPT_PADCHAR;
169 /* argv[1], argv[2], etc. are no longer valid. */
170 *argv1_addr = NULL;
171#endif
172
173#endif /* SPT_NONE */
174}
175
176#endif /* HAVE_SETPROCTITLE */
len
int len
Length of the buffer.
Definition io.h:8
util.h
ruby_strdup
char * ruby_strdup(const char *str)
This is our own version of strdup(3) that uses ruby_xmalloc() instead of system malloc (benefits our ...
Definition util.c:535
stdarg.h
Defines old _.