2
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
660
|
4 * Copyright (C) Nginx, Inc.
|
2
|
5 */
|
|
6
|
|
7
|
|
8 #include <ngx_config.h>
|
|
9 #include <ngx_core.h>
|
|
10
|
|
11
|
|
12 #if (NGX_SETPROCTITLE_USES_ENV)
|
|
13
|
|
14 /*
|
|
15 * To change the process title in Linux and Solaris we have to set argv[1]
|
|
16 * to NULL and to copy the title to the same place where the argv[0] points to.
|
|
17 * However, argv[0] may be too small to hold a new title. Fortunately, Linux
|
|
18 * and Solaris store argv[] and environ[] one after another. So we should
|
|
19 * ensure that is the continuous memory and then we allocate the new memory
|
|
20 * for environ[] and copy it. After this we could use the memory starting
|
|
21 * from argv[0] for our process title.
|
|
22 *
|
|
23 * The Solaris's standard /bin/ps does not show the changed process title.
|
670
|
24 * You have to use "/usr/ucb/ps -w" instead. Besides, the UCB ps does not
|
2
|
25 * show a new title if its length less than the origin command line length.
|
|
26 * To avoid it we append to a new title the origin command line in the
|
|
27 * parenthesis.
|
|
28 */
|
|
29
|
|
30 extern char **environ;
|
|
31
|
|
32 static char *ngx_os_argv_last;
|
|
33
|
42
|
34 ngx_int_t
|
|
35 ngx_init_setproctitle(ngx_log_t *log)
|
2
|
36 {
|
42
|
37 u_char *p;
|
2
|
38 size_t size;
|
|
39 ngx_uint_t i;
|
|
40
|
|
41 size = 0;
|
|
42
|
|
43 for (i = 0; environ[i]; i++) {
|
|
44 size += ngx_strlen(environ[i]) + 1;
|
|
45 }
|
|
46
|
50
|
47 p = ngx_alloc(size, log);
|
|
48 if (p == NULL) {
|
2
|
49 return NGX_ERROR;
|
|
50 }
|
|
51
|
|
52 ngx_os_argv_last = ngx_os_argv[0];
|
|
53
|
|
54 for (i = 0; ngx_os_argv[i]; i++) {
|
|
55 if (ngx_os_argv_last == ngx_os_argv[i]) {
|
|
56 ngx_os_argv_last = ngx_os_argv[i] + ngx_strlen(ngx_os_argv[i]) + 1;
|
|
57 }
|
|
58 }
|
|
59
|
|
60 for (i = 0; environ[i]; i++) {
|
|
61 if (ngx_os_argv_last == environ[i]) {
|
|
62
|
|
63 size = ngx_strlen(environ[i]) + 1;
|
|
64 ngx_os_argv_last = environ[i] + size;
|
|
65
|
42
|
66 ngx_cpystrn(p, (u_char *) environ[i], size);
|
|
67 environ[i] = (char *) p;
|
2
|
68 p += size;
|
|
69 }
|
|
70 }
|
|
71
|
|
72 ngx_os_argv_last--;
|
|
73
|
|
74 return NGX_OK;
|
|
75 }
|
|
76
|
|
77
|
42
|
78 void
|
|
79 ngx_setproctitle(char *title)
|
2
|
80 {
|
|
81 u_char *p;
|
|
82
|
4
|
83 #if (NGX_SOLARIS)
|
2
|
84
|
|
85 ngx_int_t i;
|
|
86 size_t size;
|
|
87
|
|
88 #endif
|
|
89
|
|
90 ngx_os_argv[1] = NULL;
|
|
91
|
56
|
92 p = ngx_cpystrn((u_char *) ngx_os_argv[0], (u_char *) "nginx: ",
|
2
|
93 ngx_os_argv_last - ngx_os_argv[0]);
|
|
94
|
|
95 p = ngx_cpystrn(p, (u_char *) title, ngx_os_argv_last - (char *) p);
|
|
96
|
4
|
97 #if (NGX_SOLARIS)
|
2
|
98
|
|
99 size = 0;
|
|
100
|
|
101 for (i = 0; i < ngx_argc; i++) {
|
|
102 size += ngx_strlen(ngx_argv[i]) + 1;
|
|
103 }
|
|
104
|
|
105 if (size > (size_t) ((char *) p - ngx_os_argv[0])) {
|
|
106
|
|
107 /*
|
|
108 * ngx_setproctitle() is too rare operation so we use
|
|
109 * the non-optimized copies
|
|
110 */
|
|
111
|
|
112 p = ngx_cpystrn(p, (u_char *) " (", ngx_os_argv_last - (char *) p);
|
|
113
|
|
114 for (i = 0; i < ngx_argc; i++) {
|
|
115 p = ngx_cpystrn(p, (u_char *) ngx_argv[i],
|
|
116 ngx_os_argv_last - (char *) p);
|
|
117 p = ngx_cpystrn(p, (u_char *) " ", ngx_os_argv_last - (char *) p);
|
|
118 }
|
|
119
|
|
120 if (*(p - 1) == ' ') {
|
|
121 *(p - 1) = ')';
|
|
122 }
|
|
123 }
|
|
124
|
|
125 #endif
|
|
126
|
|
127 if (ngx_os_argv_last - (char *) p) {
|
|
128 ngx_memset(p, NGX_SETPROCTITLE_PAD, ngx_os_argv_last - (char *) p);
|
|
129 }
|
|
130
|
|
131 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
|
|
132 "setproctitle: \"%s\"", ngx_os_argv[0]);
|
|
133 }
|
|
134
|
58
|
135 #endif /* NGX_SETPROCTITLE_USES_ENV */
|