몇일전에 올린문제인데 아직 해결이 안되서(Segmentation fault)

//tsdbsvr.c
#include "apcommon.h"
#include "apconfig.h"
main(int argc, char** argv)
{
#ifdef _DEBUG_
printf("시작\n");
#endif
infSetUserParm(&gstUserParm, argc, argv);
infInitProcess(argc, argv);
infMainRoutine(&gstUserParm);
infTermProcess();
}
//apconfig.c
#include "apcommon.h"
int infSetUserParm(SUserParm_T *pUser, int argc, char **argv)
{
char szFileName[256];
char *pPath;

gpAppName = argv[0];
infCpyUserParm(pUser);

if ( argc == 2 ) {
sprintf(szFileName, "%s", argv[1]);
} else {
if ( (pPath = getenv("CFG_DIR")) != NULL ) {
sprintf(szFileName, "%s/%s.cfg", pPath, argv[0]);
} else {
sprintf(szFileName, "%s.cfg", argv[0]);
}
}

#if 0
fprintf(stdout, "CONFIG FILE NAME[%s]\n", szFileName);
#endif
return infSetUserparm(pUser, szFileName);
}

int infSetUserparm(SUserParm_T *pUser, char *szFileName)
{
return RETOK;
}
//apcommon.c
static SUserParm_T *gpstUser;
void infCpyUserParm(SUserParm_T *pUser) { gpstUser = pUser; }

실행하면 Segmentation fault (core dump)납니다
그때 디버그툴 gdb를 사용하라는 말에 몇일 공부했지만 이유를 모르겠습니다.
조금만 더 도와주세요

gdb 결과입니다
(gdb) run
Starting program: /home/techno/bin/tsdbsvr
[New Thread 1024 (LWP 1440)]
시작

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1024 (LWP 1440)]
0x0804e6cd in infSetUserparm (pUser=0x844f3c0,
szFileName=0xbffff97c "/home/techno/bin/tsdbsvr.cfg") at apconfig.c:810
810 {
(gdb) bt
#0 0x0804e6cd in infSetUserparm (pUser=0x844f3c0,
szFileName=0xbffff97c "/home/techno/bin/tsdbsvr.cfg") at apconfig.c:810
#1 0x0804e6b0 in infSetUserParm (pUser=0x844f3c0, argc=1, argv=0xbffffb04)
at apconfig.c:806
#2 0x0804ac07 in main (argc=1, argv=0xbffffb04)
at /home/techno/src/tsdbsvr.c:1186
#3 0x40046545 in __libc_start_main () from /lib/libc.so.6