Ненормальная работа функции system()

{
		printf("You don't have rights to read this file.\n"
		"Rights for this file:\n");
		//fflush(stdout);
		setbuf(stdout, NULL);
		char b[7+strlen(argv[1])];
		strcpy(b, "ls -l "); 
		system(strcat(b,argv[1]));
		return 1;
	}

$ cat a
file AAA
./test2 a
file AAA
�$
$ ./test2 a;date
file AAA
�Срд Май 19 13:41:59 MSD 2010

$ touch a\;date 
$./cloncat a* 

$ cat a\;date 
ddq
dasdsa
$ chmod 000 a\;date 
$ ./test2 a*
You don't have rights to read this file.
Rights for this file:
ls: невозможно получить доступ к a: Нет такого файла или каталога
Срд Май 19 16:47:00 MSD 2010

alex@95-65-17-135 ~]$ touch a
[alex@95-65-17-135 ~]$ chmod 000 a
[alex@95-65-17-135 ~]$ ./cloncat a*
You don't have rights to read this file.
Rights for this file:
----------. 1 alex alex 0 Май 19 16:07 a
[alex@95-65-17-135 ~]$ 

$ touch a\;date

[alex@95-65-17-135 ~]$ ./cloncat a\;date 
dgfujhghgjhh
�[alex@95-65-17-135 ~]$ 

$./stat a\;date 
File type:                regular file
I-node number:            5139
Mode:                     100000 (octal)
Link count:               1
Ownership:                UID=1000   GID=1000
Preferred I/O block size: 4096 bytes
File size:                11 bytes
Blocks allocated:         8
Last status change:       Wed May 19 16:46:43 2010
Last file access:         Wed May 19 16:45:35 2010
Last file modification:   Wed May 19 16:45:33 2010

else if(access(argv[1],4)==-1){
		stat(argv[1],&buf);
		printf("You don't have rights to read this file.\n"
		"Rights for this file:\nAccess mode: %o\nUID of owner: %d\n"
		"GID of owner: %d\nLast access time:%ld\nLast status change time:%ld\n"
		"Last change time:%ld\n",buf.st_mode,buf.st_uid,buf.st_gid,buf.st_atime,buf.st_mtime,buf.st_ctime);
		return 1;
	}

[alex@95-65-17-135 ~]$ ./cloncat hreni 
You don't have rights to read this file.
Rights for this file:
Access mode: 100000
UID of owner: 500
GID of owner: 500
Last access time:1274038768
Last status change time:1274038767
Last change time:1274038771

#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
	struct stat sb;

	if (argc != 2) {
		fprintf(stderr, "Usage: %s <pathname>\n", argv[0]);
		exit(EXIT_FAILURE);
	}

	if (stat(argv[1], &sb) == -1) {
		perror("stat");
		exit(EXIT_FAILURE);
	}

	printf("File type:                ");

	switch (sb.st_mode & S_IFMT) {
	case S_IFBLK:
		printf("block device\n");
		break;
	case S_IFCHR:
		printf("character device\n");
		break;
	case S_IFDIR:
		printf("directory\n");
		break;
	case S_IFIFO:
		printf("FIFO/pipe\n");
		break;
	case S_IFLNK:
		printf("symlink\n");
		break;
	case S_IFREG:
		printf("regular file\n");
		break;
	case S_IFSOCK:
		printf("socket\n");
		break;
	default:
		printf("unknown?\n");
		break;
	}

	printf("I-node number:            %ld\n", (long) sb.st_ino);

	printf("Mode:                     %lo (octal)\n", (unsigned long) sb.st_mode);

	printf("Link count:               %ld\n", (long) sb.st_nlink);
	printf("Ownership:                UID=%ld   GID=%ld\n", (long) sb.st_uid, (long) sb.st_gid);

	printf("Preferred I/O block size: %ld bytes\n", (long) sb.st_blksize);
	printf("File size:                %lld bytes\n", (long long) sb.st_size);
	printf("Blocks allocated:         %lld\n", (long long) sb.st_blocks);

	printf("Last status change:       %s", ctime(&sb.st_ctime));
	printf("Last file access:         %s", ctime(&sb.st_atime));
	printf("Last file modification:   %s", ctime(&sb.st_mtime));

	exit(EXIT_SUCCESS);
}