search path: lt_dlpathopen(): initial implementation.

2 files changed, 48 insertions, 0 deletions

diff --git a/include/sltdl/sltdl.h b/include/sltdl/sltdl.h
index a65fe8b..bd0b5bb 100644
--- a/include/sltdl/sltdl.h
+++ b/include/sltdl/sltdl.h
@@ -27,6 +27,7 @@ lt_api int lt_dlinit(void);
 lt_api int lt_dlexit(void);
 
 /* library search path */
+lt_api int          lt_dlpathopen(const char *, const char **);
 lt_api int          lt_dladdsearchdir(const char *);
 lt_api int          lt_dlinsertsearchdir(const char *, const char *);
 lt_api int          lt_dlsetsearchpath(const char *);
diff --git a/src/core/lt_path.c b/src/core/lt_path.c
index 14eb0eb..5d58b03 100644
--- a/src/core/lt_path.c
+++ b/src/core/lt_path.c
@@ -5,9 +5,11 @@
 /*******************************************************************/
 
 #include <limits.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <pthread.h>
 #include <sltdl/sltdl.h>
 #include "sltdl_core.h"
@@ -240,3 +242,48 @@ int lt_dlinsertsearchdir(const char * mark, const char * path)
 
 	return lt_sunlock(ret);
 }
+
+int lt_dlpathopen(const char * module, const char ** extv)
+{
+	int           fdat;
+	int           fdmod;
+	char **       ppath;
+	const char ** pext;
+	size_t        mlen;
+	size_t        elen;
+	char          path[1024];
+
+	if ((mlen = strlen(module)) >= sizeof(path))
+		return -1;
+
+	memcpy(path,module,mlen);
+
+	lt_slock();
+
+	for (ppath=lt_pathv; *ppath; ppath++) {
+		fdat = open(*ppath,O_RDONLY|O_DIRECTORY|O_CLOEXEC,0);
+
+		if (fdat >= 0) {
+			for (pext=extv; *pext; pext++) {
+				if (mlen + (elen = strlen(*pext)) >= (sizeof(path))) {
+					close(fdat);
+					return (-1);
+				}
+
+				memcpy(&path[mlen],*pext,elen);
+				path[mlen+elen] = 0;
+
+				fdmod = openat(fdat,path,O_EXEC|O_CLOEXEC,0);
+
+				if (fdmod >= 0) {
+					close(fdat);
+					return lt_sunlock(fdmod);
+				}
+			}
+
+			close(fdat);
+		}
+	}
+
+	return lt_sunlock(-1);
+}