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plugin expand path automatically adds extension

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If a plugin is configured without the extension,
`ns_plugin_expandpath()` automatically take cares of appending the
suffix to the path. The way it works is by checking if a file exists at
the expanded path. If it doesn't, it assumes the plugin path (or name)
doesn't have the extension and append the extension (which is
platform-specific) to the actual path.
This commit is contained in:
Colin Vidal
2025-07-21 15:06:11 +02:00
parent be03ed6520
commit 7747ac8aed
1 changed files with 23 additions and 4 deletions
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27
lib/ns/hooks.c
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@@ -18,6 +18,7 @@
#include <string.h>
#include <isc/errno.h>
#include <isc/file.h>
#include <isc/list.h>
#include <isc/log.h>
#include <isc/mem.h>
@@ -54,9 +55,10 @@ struct ns_plugin {
static ns_hooklist_t default_hooktable[NS_HOOKPOINTS_COUNT];
ns_hooktable_t *ns__hook_table = &default_hooktable;
isc_result_t
ns_plugin_expandpath(const char *src, char *dst, size_t dstsize) {
static isc_result_t
plugin_expandpath(const char *src, char *dst, size_t dstsize, bool appendext) {
int result;
const char *ext = appendext ? NAMED_PLUGINEXT : "";
/*
* On Unix systems, differentiate between paths and filenames.
@@ -65,12 +67,13 @@ ns_plugin_expandpath(const char *src, char *dst, size_t dstsize) {
/*
* 'src' is an absolute or relative path. Copy it verbatim.
*/
result = snprintf(dst, dstsize, "%s", src);
result = snprintf(dst, dstsize, "%s%s", src, ext);
} else {
/*
* 'src' is a filename. Prepend default plugin directory path.
*/
result = snprintf(dst, dstsize, "%s/%s", NAMED_PLUGINDIR, src);
result = snprintf(dst, dstsize, "%s/%s%s", NAMED_PLUGINDIR, src,
ext);
}
if (result < 0) {
@@ -82,6 +85,22 @@ ns_plugin_expandpath(const char *src, char *dst, size_t dstsize) {
}
}
isc_result_t
ns_plugin_expandpath(const char *src, char *dst, size_t dstsize) {
isc_result_t result;
result = plugin_expandpath(src, dst, dstsize, false);
if (result != ISC_R_SUCCESS) {
return result;
}
if (isc_file_exists(dst) == false) {
result = plugin_expandpath(src, dst, dstsize, true);
}
return result;
}
static isc_result_t
load_symbol(uv_lib_t *handle, const char *modpath, const char *symbol_name,
void **symbolp) {