1 /* (c) 2007,2008 Andrei Nigmatulin */
2
3 #include "fpm_config.h"
4
5 #ifdef HAVE_ALLOCA_H
6 #include <alloca.h>
7 #endif
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <string.h>
11
12 #include "fpm_env.h"
13 #include "fpm.h"
14
15 #ifndef HAVE_SETPROCTITLE
16 #ifdef __linux__
17 static char **fpm_env_argv = NULL;
18 static size_t fpm_env_argv_len = 0;
19 #endif
20 #endif
21
22 #ifndef HAVE_SETENV
23 # ifdef (__sparc__ || __sparc)
setenv(char * name,char * value,int clobber)24 int setenv(char *name, char *value, int clobber) /* {{{ */
25 {
26 char *malloc();
27 char *getenv();
28 char *cp;
29
30 if (clobber == 0 && getenv(name) != 0) {
31 return 0;
32 }
33
34 if ((cp = malloc(strlen(name) + strlen(value) + 2)) == 0) {
35 return 1;
36 }
37 sprintf(cp, "%s=%s", name, value);
38 return putenv(cp);
39 }
40 /* }}} */
41 # else
setenv(char * name,char * value,int overwrite)42 int setenv(char *name, char *value, int overwrite) /* {{{ */
43 {
44 int name_len = strlen(name);
45 int value_len = strlen(value);
46 char *var = alloca(name_len + 1 + value_len + 1);
47
48 memcpy(var, name, name_len);
49
50 var[name_len] = '=';
51
52 memcpy(var + name_len + 1, value, value_len);
53
54 var[name_len + 1 + value_len] = '\0';
55
56 return putenv(var);
57 }
58 /* }}} */
59 # endif
60 #endif
61
62 #ifndef HAVE_CLEARENV
clearenv()63 void clearenv() /* {{{ */
64 {
65 char **envp;
66 char *s;
67
68 /* this algo is the only one known to me
69 that works well on all systems */
70 while (*(envp = environ)) {
71 char *eq = strchr(*envp, '=');
72
73 s = strdup(*envp);
74
75 if (eq) s[eq - *envp] = '\0';
76
77 unsetenv(s);
78 free(s);
79 }
80
81 }
82 /* }}} */
83 #endif
84
85 #ifndef HAVE_UNSETENV
unsetenv(const char * name)86 void unsetenv(const char *name) /* {{{ */
87 {
88 if(getenv(name) != NULL) {
89 int ct = 0;
90 int del = 0;
91
92 while(environ[ct] != NULL) {
93 if (nvmatch(name, environ[ct]) != 0) del=ct; /* <--- WTF?! */
94 { ct++; } /* <--- WTF?! */
95 }
96 /* isn't needed free here?? */
97 environ[del] = environ[ct-1];
98 environ[ct-1] = NULL;
99 }
100 }
101 /* }}} */
102
nvmatch(char * s1,char * s2)103 static char * nvmatch(char *s1, char *s2) /* {{{ */
104 {
105 while(*s1 == *s2++)
106 {
107 if(*s1++ == '=') {
108 return s2;
109 }
110 }
111 if(*s1 == '\0' && *(s2-1) == '=') {
112 return s2;
113 }
114 return NULL;
115 }
116 /* }}} */
117 #endif
118
fpm_env_setproctitle(char * title)119 void fpm_env_setproctitle(char *title) /* {{{ */
120 {
121 #if defined(HAVE_SETPROCTITLE_FAST)
122 setproctitle_fast("%s", title);
123 #elif defined(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 char *title;
203
204 for (wp = fpm_worker_all_pools; wp; wp = wp->next) {
205 if (0 > fpm_env_conf_wp(wp)) {
206 return -1;
207 }
208 }
209 #ifndef HAVE_SETPROCTITLE
210 #ifdef __linux__
211 int i;
212 char *first = NULL;
213 char *last = NULL;
214 /*
215 * This piece of code has been inspirated from nginx and pureftpd code, which
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
