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/* By Mike Frysinger <vapier@gentoo.org>; released into public domain */
#define _GNU_SOURCE
#include <dlfcn.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
#define FAIL(fmt, args...) errx(1, fmt, ## args)
static void *xdlopen(char *lib, int flag)
{
void *hdl;
if (!strcmp(lib, "RTLD_DEFAULT"))
hdl = RTLD_DEFAULT;
else if (!strcmp(lib, "RTLD_NEXT"))
hdl = RTLD_NEXT;
else {
hdl = dlopen(lib, flag);
if (!hdl)
FAIL("dlopen(\"%s\") failed: %s", lib, dlerror());
}
printf("dlopen(\"%s\") returned %p\n", lib, hdl);
return hdl;
}
static int xdlclose(void *hdl)
{
if (hdl != RTLD_DEFAULT && hdl != RTLD_NEXT) {
if (dlclose(hdl))
FAIL("dlcose() failed: %s", dlerror());
printf("dlclose(%p) worked\n", hdl);
} else
printf("dlclose() not needed for RTLD_{DEFAULT,NEXT}\n");
return 0;
}
static void *xdlsym(void *hdl, char *sym)
{
void *sym_hdl = dlsym(hdl, sym);
if (!sym_hdl)
FAIL("dlsym(\"%s\") failed: %s", sym, dlerror());
printf("dlsym(\"%s\") returned %p\n", sym, sym_hdl);
return sym_hdl;
}
static void *xdlvsym(void *hdl, char *sym, char *ver)
{
void *sym_hdl = dlvsym(hdl, sym, ver);
if (!sym_hdl)
FAIL("dlvsym(\"%s\", \"%s\") failed: %s", sym, ver, dlerror());
printf("dlvsym(\"%s\", \"%s\") returned %p\n", sym, ver, sym_hdl);
return sym_hdl;
}
static int do_dlopen(int argc, char *argv[])
{
char *lib = argv[1];
if (!lib)
FAIL("Usage: dlopen <lib name|RTLD_DEFAULT|RTLD_NEXT>");
void *hdl = xdlopen(lib, RTLD_LAZY);
return xdlclose(hdl);
}
static int do_dlsym(int argc, char *argv[])
{
if (argc != 3)
FAIL("Usage: dlsym <lib name|RTLD_DEFAULT|RTLD_NEXT> <sym>");
char *lib = argv[1];
char *hdl = xdlopen(lib, RTLD_LAZY);
char *sym = argv[2];
/* void *sym_hdl = */ xdlsym(hdl, sym);
return xdlclose(hdl);
}
static int do_dlvsym(int argc, char *argv[])
{
if (argc != 4)
FAIL("Usage: dlvsym <lib name|RTLD_DEFAULT|RTLD_NEXT> <sym> <version>");
char *lib = argv[1];
char *hdl = xdlopen(lib, RTLD_LAZY);
char *sym = argv[2];
char *ver = argv[3];
/* void *sym_hdl = */ xdlvsym(hdl, sym, ver);
return xdlclose(hdl);
}
int main(int argc, char *argv[])
{
int ret;
char *argv0 = strrchr(argv[0], '/');
argv0 = argv0 ? argv0 + 1 : argv[0];
if (!strcmp(argv0, "dlsym"))
ret = do_dlsym(argc, argv);
else if (!strcmp(argv0, "dlvsym"))
ret = do_dlvsym(argc, argv);
else
ret = do_dlopen(argc, argv);
printf("%1$s: all tests %1$sED\n", ret ? "FAIL" : "PASS");
return ret;
}
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