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/*----------------------------------------------------------------------------*/
/* Xymon monitor library. */
/* */
/* This is a library module for Xymon, responsible for loading the host-, */
/* page-, and column-links present in www/notes and www/help. */
/* */
/* Copyright (C) 2004-2011 Henrik Storner <henrik@hswn.dk> */
/* */
/* This program is released under the GNU General Public License (GPL), */
/* version 2. See the file "COPYING" for details. */
/* */
/*----------------------------------------------------------------------------*/
static char rcsid[] = "$Id: links.c 8069 2019-07-23 15:29:06Z jccleaver $";
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <dirent.h>
#include "libxymon.h"
/* Info-link definitions. */
typedef struct link_t {
char *key;
char *filename;
char *urlprefix; /* "/help", "/notes" etc. */
} link_t;
static int linksloaded = 0;
static void * linkstree;
STATIC_SBUF_DEFINE(notesskin);
STATIC_SBUF_DEFINE(helpskin);
static char *columndocurl = NULL;
static char *hostdocurl = NULL;
char *link_docext(char *fn)
{
char *p = strrchr(fn, '.');
if (p == NULL) return NULL;
if ( (strcasecmp(p, ".php") == 0) ||
(strcasecmp(p, ".php3") == 0) ||
(strcasecmp(p, ".asp") == 0) ||
(strcasecmp(p, ".pdf") == 0) ||
(strcasecmp(p, ".doc") == 0) ||
(strcasecmp(p, ".docx") == 0) ||
(strcasecmp(p, ".odt") == 0) ||
(strcasecmp(p, ".shtml") == 0) ||
(strcasecmp(p, ".phtml") == 0) ||
(strcasecmp(p, ".html") == 0) ||
(strcasecmp(p, ".htm") == 0)) {
return p;
}
return NULL;
}
static link_t *init_link(char *filename, char *urlprefix)
{
char *p;
link_t *newlink = NULL;
dbgprintf("init_link(%s, %s)\n", textornull(filename), textornull(urlprefix));
newlink = (link_t *) malloc(sizeof(link_t));
newlink->filename = strdup(filename);
newlink->urlprefix = urlprefix;
/* Without extension, this time */
p = link_docext(filename);
if (p) *p = '\0';
newlink->key = strdup(filename);
return newlink;
}
static void load_links(char *directory, char *urlprefix)
{
DIR *linkdir;
struct dirent *d;
char fn[PATH_MAX];
dbgprintf("load_links(%s, %s)\n", textornull(directory), textornull(urlprefix));
linkdir = opendir(directory);
if (!linkdir) {
errprintf("Cannot read links in directory %s\n", directory);
return;
}
MEMDEFINE(fn);
while ((d = readdir(linkdir))) {
link_t *newlink;
if (*(d->d_name) == '.') continue;
strncpy(fn, d->d_name, sizeof(fn));
newlink = init_link(fn, urlprefix);
xtreeAdd(linkstree, newlink->key, newlink);
}
closedir(linkdir);
MEMUNDEFINE(fn);
}
void load_all_links(void)
{
char dirname[PATH_MAX];
char *p;
MEMDEFINE(dirname);
dbgprintf("load_all_links()\n");
linkstree = xtreeNew(strcasecmp);
if (notesskin) { xfree(notesskin); notesskin = NULL; }
if (helpskin) { xfree(helpskin); helpskin = NULL; }
if (columndocurl) { xfree(columndocurl); columndocurl = NULL; }
if (hostdocurl) { xfree(hostdocurl); hostdocurl = NULL; }
if (xgetenv("XYMONNOTESSKIN")) notesskin = strdup(xgetenv("XYMONNOTESSKIN"));
else {
SBUF_MALLOC(notesskin, strlen(xgetenv("XYMONWEB")) + strlen("/notes") + 1);
snprintf(notesskin, notesskin_buflen, "%s/notes", xgetenv("XYMONWEB"));
}
if (xgetenv("XYMONHELPSKIN")) helpskin = strdup(xgetenv("XYMONHELPSKIN"));
else {
SBUF_MALLOC(helpskin, strlen(xgetenv("XYMONWEB")) + strlen("/help") + 1);
snprintf(helpskin, helpskin_buflen, "%s/help", xgetenv("XYMONWEB"));
}
if (xgetenv("COLUMNDOCURL")) columndocurl = strdup(xgetenv("COLUMNDOCURL"));
if (xgetenv("HOSTDOCURL")) hostdocurl = strdup(xgetenv("HOSTDOCURL"));
if (!hostdocurl || (strlen(hostdocurl) == 0)) {
strncpy(dirname, xgetenv("XYMONNOTESDIR"), sizeof(dirname));
load_links(dirname, notesskin);
}
/* Change xxx/xxx/xxx/notes into xxx/xxx/xxx/help */
strncpy(dirname, xgetenv("XYMONNOTESDIR"), sizeof(dirname));
p = strrchr(dirname, '/'); *p = '\0'; strncat(dirname, "/help", (sizeof(dirname) - strlen(dirname)));
load_links(dirname, helpskin);
linksloaded = 1;
MEMUNDEFINE(dirname);
}
static link_t *find_link(char *key)
{
link_t *l = NULL;
xtreePos_t handle;
handle = xtreeFind(linkstree, key);
if (handle != xtreeEnd(linkstree)) l = (link_t *)xtreeData(linkstree, handle);
return l;
}
char *columnlink(char *colname)
{
STATIC_SBUF_DEFINE(linkurl);
link_t *link;
if (linkurl == NULL) SBUF_MALLOC(linkurl, PATH_MAX);
if (!linksloaded) load_all_links();
link = find_link(colname);
if (link) {
snprintf(linkurl, linkurl_buflen, "%s/%s", link->urlprefix, link->filename);
}
else if (columndocurl) {
snprintf(linkurl, linkurl_buflen, columndocurl, colname);
}
else {
*linkurl = '\0';
}
return linkurl;
}
char *hostlink(char *hostname)
{
STATIC_SBUF_DEFINE(linkurl);
link_t *link;
if (linkurl == NULL) SBUF_MALLOC(linkurl, PATH_MAX);
if (!linksloaded) load_all_links();
if (hostdocurl && *hostdocurl) {
snprintf(linkurl, linkurl_buflen, hostdocurl, hostname);
return linkurl;
}
else {
link = find_link(hostname);
if (link) {
snprintf(linkurl, linkurl_buflen, "%s/%s", link->urlprefix, link->filename);
return linkurl;
}
}
return NULL;
}
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