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comparison src/os/unix/ngx_setproctitle.c @ 452:23fb87bddda1 release-0.1.1

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nginx-0.1.1-RELEASE import *) Feature: the gzip_types directive. *) Feature: the tcp_nodelay directive. *) Feature: the send_lowat directive is working not only on OSes that support kqueue NOTE_LOWAT, but also on OSes that support SO_SNDLOWAT. *) Feature: the setproctitle() emulation for Linux and Solaris. *) Bugfix: the "Location" header rewrite bug fixed while the proxying. *) Bugfix: the ngx_http_chunked_module module may get caught in an endless loop. *) Bugfix: the /dev/poll module bugs fixed. *) Bugfix: the responses were corrupted when the temporary files were used while the proxying. *) Bugfix: the unescaped requests were passed to the backend. *) Bugfix: while the build configuration on Linux 2.4 the --with-poll_module parameter was required.
author Igor Sysoev <igor@sysoev.ru>
date Mon, 11 Oct 2004 15:07:03 +0000
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children 295d97d70c69
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451:f40362e47689 452:23fb87bddda1
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9
10
11 #if (NGX_SETPROCTITLE_USES_ENV)
12
13 /*
14 * To change the process title in Linux and Solaris we have to set argv[1]
15 * to NULL and to copy the title to the same place where the argv[0] points to.
16 * However, argv[0] may be too small to hold a new title. Fortunately, Linux
17 * and Solaris store argv[] and environ[] one after another. So we should
18 * ensure that is the continuous memory and then we allocate the new memory
19 * for environ[] and copy it. After this we could use the memory starting
20 * from argv[0] for our process title.
21 *
22 * The Solaris's standard /bin/ps does not show the changed process title.
23 * You have to use "/usr/ucb/ps -w" instead. Besides, the UCB ps dos not
24 * show a new title if its length less than the origin command line length.
25 * To avoid it we append to a new title the origin command line in the
26 * parenthesis.
27 */
28
29 extern char **environ;
30
31 static char *ngx_os_argv_last;
32
33 ngx_int_t ngx_init_setproctitle(ngx_log_t *log)
34 {
35 char *p;
36 size_t size;
37 ngx_uint_t i;
38
39 size = 0;
40
41 for (i = 0; environ[i]; i++) {
42 size += ngx_strlen(environ[i]) + 1;
43 }
44
45 if (!(p = ngx_alloc(size, log))) {
46 return NGX_ERROR;
47 }
48
49 ngx_os_argv_last = ngx_os_argv[0];
50
51 for (i = 0; ngx_os_argv[i]; i++) {
52 if (ngx_os_argv_last == ngx_os_argv[i]) {
53 ngx_os_argv_last = ngx_os_argv[i] + ngx_strlen(ngx_os_argv[i]) + 1;
54 }
55 }
56
57 for (i = 0; environ[i]; i++) {
58 if (ngx_os_argv_last == environ[i]) {
59
60 size = ngx_strlen(environ[i]) + 1;
61 ngx_os_argv_last = environ[i] + size;
62
63 ngx_cpystrn(p, environ[i], size);
64 environ[i] = p;
65 p += size;
66 }
67 }
68
69 ngx_os_argv_last--;
70
71 return NGX_OK;
72 }
73
74
75 void ngx_setproctitle(char *title)
76 {
77 u_char *p;
78
79 #if (SOLARIS)
80
81 ngx_int_t i;
82 size_t size;
83
84 #endif
85
86 ngx_os_argv[1] = NULL;
87
88 p = ngx_cpystrn((u_char *) ngx_os_argv[0], "nginx: ",
89 ngx_os_argv_last - ngx_os_argv[0]);
90
91 p = ngx_cpystrn(p, (u_char *) title, ngx_os_argv_last - (char *) p);
92
93 #if (SOLARIS)
94
95 size = 0;
96
97 for (i = 0; i < ngx_argc; i++) {
98 size += ngx_strlen(ngx_argv[i]) + 1;
99 }
100
101 if (size > (size_t) ((char *) p - ngx_os_argv[0])) {
102
103 /*
104 * ngx_setproctitle() is too rare operation so we use
105 * the non-optimized copies
106 */
107
108 p = ngx_cpystrn(p, (u_char *) " (", ngx_os_argv_last - (char *) p);
109
110 for (i = 0; i < ngx_argc; i++) {
111 p = ngx_cpystrn(p, (u_char *) ngx_argv[i],
112 ngx_os_argv_last - (char *) p);
113 p = ngx_cpystrn(p, (u_char *) " ", ngx_os_argv_last - (char *) p);
114 }
115
116 if (*(p - 1) == ' ') {
117 *(p - 1) = ')';
118 }
119 }
120
121 #endif
122
123 if (ngx_os_argv_last - (char *) p) {
124 ngx_memset(p, NGX_SETPROCTITLE_PAD, ngx_os_argv_last - (char *) p);
125 }
126
127 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
128 "setproctitle: \"%s\"", ngx_os_argv[0]);
129 }
130
131
132 #elif !defined(ngx_setproctitle)
133
134 ngx_int_t ngx_init_setproctitle(ngx_log_t *log)
135 {
136 return NGX_OK;
137 }
138
139 void ngx_setproctitle(char *title)
140 {
141 }
142
143 #endif