/[dynamips]/trunk/plugin.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/plugin.c

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Revision 12 - (show annotations)
Sat Oct 6 16:45:40 2007 UTC (12 years ago) by dpavlin
File MIME type: text/plain
File size: 1437 byte(s)
make working copy

1 /*
2 * Cisco router simulation platform.
3 * Copyright (c) 2007 Christophe Fillot (cf@utc.fr)
4 *
5 * Plugin management.
6 */
7
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <unistd.h>
11 #include <string.h>
12 #include <errno.h>
13 #include <sys/types.h>
14 #include <sys/stat.h>
15 #include <sys/mman.h>
16 #include <signal.h>
17 #include <fcntl.h>
18 #include <assert.h>
19 #include <dlfcn.h>
20
21 #include "utils.h"
22 #include "plugin.h"
23
24 /* Plugin list */
25 static struct plugin *plugin_list = NULL;
26
27 /* Find a symbol address */
28 void *plugin_find_symbol(struct plugin *plugin,char *symbol)
29 {
30 return((plugin != NULL) ? dlsym(plugin->dl_handle,symbol) : NULL);
31 }
32
33 /* Initialize a plugin */
34 static int plugin_init(struct plugin *plugin)
35 {
36 plugin_init_t init;
37
38 if (!(init = plugin_find_symbol(plugin,"init")))
39 return(-1);
40
41 return(init());
42 }
43
44 /* Load a plugin */
45 struct plugin *plugin_load(char *filename)
46 {
47 struct plugin *p;
48
49 if (!(p = malloc(sizeof(*p))))
50 return NULL;
51
52 memset(p,0,sizeof(*p));
53
54 if (!(p->filename = strdup(filename)))
55 goto err_strdup;
56
57 if (!(p->dl_handle = dlopen(filename,RTLD_LAZY))) {
58 fprintf(stderr,"plugin_load(\"%s\"): %s\n",filename,dlerror());
59 goto err_dlopen;
60 }
61
62 if (plugin_init(p) == -1)
63 goto err_init;
64
65 p->next = plugin_list;
66 plugin_list = p;
67 return p;
68
69 err_init:
70 dlclose(p->dl_handle);
71 err_dlopen:
72 free(p->filename);
73 err_strdup:
74 free(p);
75 return NULL;
76 }

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