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c266d310af
Original commit message from CVS: Based on Patch by: Brian Cameron <brian dot cameron at sun dot com> * ext/ladspa/search.c: (LADSPAPluginSearch): Avoid searching (null) paths or crashing on platforms where printing a NULL string segfaults. Fixes #567004.
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/* search.c
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Free software by Richard W.E. Furse. Do with as you will. No
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warranty. */
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/*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <dirent.h>
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <glib.h>
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/*****************************************************************************/
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#include "ladspa.h"
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#include "utils.h"
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/*****************************************************************************/
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/* Search just the one directory. */
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static void
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LADSPADirectoryPluginSearch
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(const char *pcDirectory,
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LADSPAPluginSearchCallbackFunction fCallbackFunction)
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{
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char *pcFilename;
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DIR *psDirectory;
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LADSPA_Descriptor_Function fDescriptorFunction;
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long lDirLength;
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long iNeedSlash;
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struct dirent *psDirectoryEntry;
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void *pvPluginHandle;
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lDirLength = strlen (pcDirectory);
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if (!lDirLength)
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return;
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if (pcDirectory[lDirLength - 1] == '/')
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iNeedSlash = 0;
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else
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iNeedSlash = 1;
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psDirectory = opendir (pcDirectory);
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if (!psDirectory)
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return;
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while (1) {
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psDirectoryEntry = readdir (psDirectory);
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if (!psDirectoryEntry) {
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closedir (psDirectory);
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return;
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}
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pcFilename = malloc (lDirLength + strlen (psDirectoryEntry->d_name)
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+ 1 + iNeedSlash);
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strcpy (pcFilename, pcDirectory);
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if (iNeedSlash)
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strcat (pcFilename, "/");
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strcat (pcFilename, psDirectoryEntry->d_name);
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pvPluginHandle = dlopen (pcFilename, RTLD_LAZY);
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if (pvPluginHandle) {
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/* This is a file and the file is a shared library! */
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dlerror ();
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fDescriptorFunction
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= (LADSPA_Descriptor_Function) dlsym (pvPluginHandle,
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"ladspa_descriptor");
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if (dlerror () == NULL && fDescriptorFunction) {
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/* We've successfully found a ladspa_descriptor function. Pass
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it to the callback function. */
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fCallbackFunction (pcFilename, pvPluginHandle, fDescriptorFunction);
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} else {
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/* It was a library, but not a LADSPA one. Unload it. */
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dlclose (pvPluginHandle);
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}
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}
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free (pcFilename);
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}
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}
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/*****************************************************************************/
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void
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LADSPAPluginSearch (LADSPAPluginSearchCallbackFunction fCallbackFunction)
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{
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char *pcBuffer;
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const char *pcEnd;
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const char *pcLADSPAPath;
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const char *pcStart;
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char *search_path;
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/* thomasvs: I'm sorry, but I'm going to add glib stuff here.
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* I'm appending logical values for LADSPA_PATH here
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*/
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search_path = getenv ("LADSPA_PATH");
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if (search_path) {
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pcLADSPAPath = g_strdup_printf ("%s:/usr/lib/ladspa:/usr/local/lib/ladspa",
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search_path);
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} else {
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pcLADSPAPath = g_strdup ("/usr/lib/ladspa:/usr/local/lib/ladspa");
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}
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if (!pcLADSPAPath) {
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/* fprintf(stderr, */
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/* "Warning: You do not have a LADSPA_PATH " */
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/* "environment variable set.\n"); */
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return;
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}
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pcStart = pcLADSPAPath;
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while (*pcStart != '\0') {
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pcEnd = pcStart;
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while (*pcEnd != ':' && *pcEnd != '\0')
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pcEnd++;
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pcBuffer = malloc (1 + pcEnd - pcStart);
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if (pcEnd > pcStart)
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strncpy (pcBuffer, pcStart, pcEnd - pcStart);
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pcBuffer[pcEnd - pcStart] = '\0';
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LADSPADirectoryPluginSearch (pcBuffer, fCallbackFunction);
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free (pcBuffer);
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pcStart = pcEnd;
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if (*pcStart == ':')
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pcStart++;
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}
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g_free ((gpointer) pcLADSPAPath);
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}
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/*****************************************************************************/
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/* EOF */
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