1
2 /* $Id: fpm_env.c,v 1.15 2008/09/18 23:19:59 anight Exp $ */
3 /* (c) 2007,2008 Andrei Nigmatulin */
4
5 #include "fpm_config.h"
6
7 #ifdef HAVE_ALLOCA_H
8 #include <alloca.h>
9 #endif
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13
14 #include "fpm_env.h"
15 #include "fpm.h"
16
17 #ifndef HAVE_SETPROCTITLE
18 #ifdef __linux__
19 static char **fpm_env_argv = NULL;
20 static size_t fpm_env_argv_len = 0;
21 #endif
22 #endif
23
24 #ifndef HAVE_SETENV
25 # ifdef (__sparc__ || __sparc)
setenv(char * name,char * value,int clobber)26 int setenv(char *name, char *value, int clobber) /* {{{ */
27 {
28 char *malloc();
29 char *getenv();
30 char *cp;
31
32 if (clobber == 0 && getenv(name) != 0) {
33 return 0;
34 }
35
36 if ((cp = malloc(strlen(name) + strlen(value) + 2)) == 0) {
37 return 1;
38 }
39 sprintf(cp, "%s=%s", name, value);
40 return putenv(cp);
41 }
42 /* }}} */
43 # else
setenv(char * name,char * value,int overwrite)44 int setenv(char *name, char *value, int overwrite) /* {{{ */
45 {
46 int name_len = strlen(name);
47 int value_len = strlen(value);
48 char *var = alloca(name_len + 1 + value_len + 1);
49
50 memcpy(var, name, name_len);
51
52 var[name_len] = '=';
53
54 memcpy(var + name_len + 1, value, value_len);
55
56 var[name_len + 1 + value_len] = '\0';
57
58 return putenv(var);
59 }
60 /* }}} */
61 # endif
62 #endif
63
64 #ifndef HAVE_CLEARENV
clearenv()65 void clearenv() /* {{{ */
66 {
67 char **envp;
68 char *s;
69
70 /* this algo is the only one known to me
71 that works well on all systems */
72 while (*(envp = environ)) {
73 char *eq = strchr(*envp, '=');
74
75 s = strdup(*envp);
76
77 if (eq) s[eq - *envp] = '\0';
78
79 unsetenv(s);
80 free(s);
81 }
82
83 }
84 /* }}} */
85 #endif
86
87 #ifndef HAVE_UNSETENV
unsetenv(const char * name)88 void unsetenv(const char *name) /* {{{ */
89 {
90 if(getenv(name) != NULL) {
91 int ct = 0;
92 int del = 0;
93
94 while(environ[ct] != NULL) {
95 if (nvmatch(name, environ[ct]) != 0) del=ct; /* <--- WTF?! */
96 { ct++; } /* <--- WTF?! */
97 }
98 /* isn't needed free here?? */
99 environ[del] = environ[ct-1];
100 environ[ct-1] = NULL;
101 }
102 }
103 /* }}} */
104
nvmatch(char * s1,char * s2)105 static char * nvmatch(char *s1, char *s2) /* {{{ */
106 {
107 while(*s1 == *s2++)
108 {
109 if(*s1++ == '=') {
110 return s2;
111 }
112 }
113 if(*s1 == '\0' && *(s2-1) == '=') {
114 return s2;
115 }
116 return NULL;
117 }
118 /* }}} */
119 #endif
120
fpm_env_setproctitle(char * title)121 void fpm_env_setproctitle(char *title) /* {{{ */
122 {
123 #ifdef HAVE_SETPROCTITLE
124 setproctitle("%s", title);
125 #else
126 #ifdef __linux__
127 if (fpm_env_argv != NULL && fpm_env_argv_len > strlen(SETPROCTITLE_PREFIX) + 3) {
128 memset(fpm_env_argv[0], 0, fpm_env_argv_len);
129 strncpy(fpm_env_argv[0], SETPROCTITLE_PREFIX, fpm_env_argv_len - 2);
130 strncpy(fpm_env_argv[0] + strlen(SETPROCTITLE_PREFIX), title, fpm_env_argv_len - strlen(SETPROCTITLE_PREFIX) - 2);
131 fpm_env_argv[1] = NULL;
132 }
133 #endif
134 #endif
135 }
136 /* }}} */
137
fpm_env_init_child(struct fpm_worker_pool_s * wp)138 int fpm_env_init_child(struct fpm_worker_pool_s *wp) /* {{{ */
139 {
140 struct key_value_s *kv;
141 char *title;
142 spprintf(&title, 0, "pool %s", wp->config->name);
143 fpm_env_setproctitle(title);
144 efree(title);
145
146 if (wp->config->clear_env) {
147 clearenv();
148 }
149
150 for (kv = wp->config->env; kv; kv = kv->next) {
151 setenv(kv->key, kv->value, 1);
152 }
153
154 if (wp->user) {
155 setenv("USER", wp->user, 1);
156 }
157
158 if (wp->home) {
159 setenv("HOME", wp->home, 1);
160 }
161
162 return 0;
163 }
164 /* }}} */
165
fpm_env_conf_wp(struct fpm_worker_pool_s * wp)166 static int fpm_env_conf_wp(struct fpm_worker_pool_s *wp) /* {{{ */
167 {
168 struct key_value_s *kv;
169
170 for (kv = wp->config->env; kv; kv = kv->next) {
171 if (*kv->value == '$') {
172 char *value = getenv(kv->value + 1);
173
174 if (!value) {
175 value = "";
176 }
177
178 free(kv->value);
179 kv->value = strdup(value);
180 }
181
182 /* autodetected values should be removed
183 if these vars specified in config */
184 if (!strcmp(kv->key, "USER")) {
185 free(wp->user);
186 wp->user = 0;
187 }
188
189 if (!strcmp(kv->key, "HOME")) {
190 free(wp->home);
191 wp->home = 0;
192 }
193 }
194
195 return 0;
196 }
197 /* }}} */
198
fpm_env_init_main()199 int fpm_env_init_main() /* {{{ */
200 {
201 struct fpm_worker_pool_s *wp;
202 int i;
203 char *first = NULL;
204 char *last = NULL;
205 char *title;
206
207 for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
208 if (0 > fpm_env_conf_wp(wp)) {
209 return -1;
210 }
211 }
212 #ifndef HAVE_SETPROCTITLE
213 #ifdef __linux__
214 /*
215 * This piece of code has been inspirated from nginx and pureftpd code, whic
216 * are under BSD licence.
217 *
218 * To change the process title in Linux we have to set argv[1] to NULL
219 * and to copy the title to the same place where the argv[0] points to.
220 * However, argv[0] may be too small to hold a new title. Fortunately, Linux
221 * store argv[] and environ[] one after another. So we should ensure that is
222 * the continuous memory and then we allocate the new memory for environ[]
223 * and copy it. After this we could use the memory starting from argv[0] for
224 * our process title.
225 */
226
227 for (i = 0; i < fpm_globals.argc; i++) {
228 if (first == NULL) {
229 first = fpm_globals.argv[i];
230 }
231 if (last == NULL || fpm_globals.argv[i] == last + 1) {
232 last = fpm_globals.argv[i] + strlen(fpm_globals.argv[i]);
233 }
234 }
235 if (environ) {
236 for (i = 0; environ[i]; i++) {
237 if (first == NULL) {
238 first = environ[i];
239 }
240 if (last == NULL || environ[i] == last + 1) {
241 last = environ[i] + strlen(environ[i]);
242 }
243 }
244 }
245 if (first == NULL || last == NULL) {
246 return 0;
247 }
248
249 fpm_env_argv_len = last - first;
250 fpm_env_argv = fpm_globals.argv;
251 if (environ != NULL) {
252 char **new_environ;
253 unsigned int env_nb = 0U;
254
255 while (environ[env_nb]) {
256 env_nb++;
257 }
258
259 if ((new_environ = malloc((1U + env_nb) * sizeof (char *))) == NULL) {
260 return -1;
261 }
262 new_environ[env_nb] = NULL;
263 while (env_nb > 0U) {
264 env_nb--;
265 new_environ[env_nb] = strdup(environ[env_nb]);
266 }
267 environ = new_environ;
268 }
269 #endif
270 #endif
271
272 spprintf(&title, 0, "master process (%s)", fpm_globals.config);
273 fpm_env_setproctitle(title);
274 efree(title);
275 return 0;
276 }
277 /* }}} */
278
279
