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Sources/uhttpd/plugin.c

  1 /*
  2  * uhttpd - Tiny single-threaded httpd
  3  *
  4  *   Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
  5  *   Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
  6  *
  7  * Permission to use, copy, modify, and/or distribute this software for any
  8  * purpose with or without fee is hereby granted, provided that the above
  9  * copyright notice and this permission notice appear in all copies.
 10  *
 11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 18  */
 19 
 20 #include <dlfcn.h>
 21 #include "uhttpd.h"
 22 #include "plugin.h"
 23 
 24 static LIST_HEAD(plugins);
 25 
 26 static const struct uhttpd_ops ops = {
 27         .dispatch_add = uh_dispatch_add,
 28         .path_match = uh_path_match,
 29         .create_process = uh_create_process,
 30         .get_process_vars = uh_get_process_vars,
 31         .http_header = uh_http_header,
 32         .client_error = uh_client_error,
 33         .request_done = uh_request_done,
 34         .chunk_write = uh_chunk_write,
 35         .chunk_printf = uh_chunk_printf,
 36         .urlencode = uh_urlencode,
 37         .urldecode = uh_urldecode,
 38 };
 39 
 40 int uh_plugin_init(const char *name)
 41 {
 42         struct uhttpd_plugin *p;
 43         const char *sym;
 44         void *dlh;
 45 
 46         dlh = dlopen(name, RTLD_LAZY | RTLD_GLOBAL);
 47         if (!dlh) {
 48                 fprintf(stderr, "Could not open plugin %s: %s\n", name, dlerror());
 49                 return -ENOENT;
 50         }
 51 
 52         sym = "uhttpd_plugin";
 53         p = dlsym(dlh, sym);
 54         if (!p) {
 55                 fprintf(stderr, "Could not find symbol '%s' in plugin '%s'\n", sym, name);
 56                 return -ENOENT;
 57         }
 58 
 59         list_add(&p->list, &plugins);
 60         return p->init(&ops, &conf);
 61 }
 62 
 63 void uh_plugin_post_init(void)
 64 {
 65         struct uhttpd_plugin *p;
 66 
 67         list_for_each_entry(p, &plugins, list)
 68                 if (p->post_init)
 69                         p->post_init();
 70 }
 71 

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