Ruby 2.7.0p0(2019-12-25revision647ee6f091eafcce70ffb75ddf7e121e192ab217)

setproctitle.c
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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
38 RUBY_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
75 static char *argv_start = NULL;
76 static size_t argv_env_len = 0;
77 static size_t argv_len = 0;
78 static char **argv1_addr = NULL;
79 #endif
80
81 #endif /* HAVE_SETPROCTITLE */
82
83 void
84 compat_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 void
139 setproctitle(const char *fmt, ...)
140 {
141 #if SPT_TYPE != SPT_NONE
142 va_list ap;
143 char ptitle[1024];
144 size_t len;
145 size_t argvlen;
146 #if SPT_TYPE == SPT_PSTAT
147 union pstun pst;
148 #endif
149
150 #if SPT_TYPE == SPT_REUSEARGV
151 if (argv_env_len <= 0)
152 return;
153 #endif
154
155 /* fmt must be non-NULL */
156 va_start(ap, fmt);
157 vsnprintf(ptitle, sizeof(ptitle), fmt, ap);
158 va_end(ap);
159
160 #if SPT_TYPE == SPT_PSTAT
161 pst.pst_command = ptitle;
162 pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0);
163 #elif SPT_TYPE == SPT_REUSEARGV
164 len = strlcpy(argv_start, ptitle, argv_env_len);
165 argvlen = len > argv_len ? argv_env_len : argv_len;
166 for(; len < argvlen; len++)
167 argv_start[len] = SPT_PADCHAR;
168 /* argv[1], argv[2], etc. are no longer valid. */
169 *argv1_addr = NULL;
170 #endif
171
172 #endif /* SPT_NONE */
173 }
174
175 #endif /* HAVE_SETPROCTITLE */
vsnprintf
int int vsnprintf(char *__restrict, size_t, const char *__restrict, __gnuc_va_list) __attribute__((__format__(__printf__
NULL
#define NULL
Definition: _sdbm.c:101
compat_init_setproctitle
#define compat_init_setproctitle
Definition: setproctitle.c:37
strlen
size_t strlen(const char *)
SPT_PADCHAR
#define SPT_PADCHAR
Definition: setproctitle.c:71
RUBY_FUNC_EXPORTED
#define RUBY_FUNC_EXPORTED
Definition: defines.h:391
calloc
void * calloc(size_t, size_t) __attribute__((__malloc__)) __attribute__((__warn_unused_result__)) __attribute__((__alloc_size__(1
i
uint32_t i
Definition: rb_mjit_min_header-2.7.0.h:5464
ruby.h
va_end
#define va_end(v)
Definition: rb_mjit_min_header-2.7.0.h:3979
strlcpy
RUBY_EXTERN size_t strlcpy(char *, const char *, size_t)
Definition: strlcpy.c:29
fmt
const VALUE int int int int int int VALUE char * fmt
Definition: rb_mjit_min_header-2.7.0.h:6462
crt_externs.h
ruby_init_setproctitle
RUBY_FUNC_EXPORTED void ruby_init_setproctitle(int argc, char *argv[])
argv
char ** argv
Definition: ruby.c:223
argc
int argc
Definition: ruby.c:222
ruby_strdup
char * ruby_strdup(const char *)
Definition: util.c:527
environ
#define environ
Definition: crt_externs.h:6
setproctitle
void setproctitle(const char *fmt,...)
Definition: setproctitle.c:139
len
uint8_t len
Definition: escape.c:17
va_start
#define va_start(v, l)
Definition: rb_mjit_min_header-2.7.0.h:3978
va_list
__gnuc_va_list va_list
Definition: rb_mjit_min_header-2.7.0.h:836
util.h