opendir列出一个目录下的所有文件

#include <stdio.h>
#include <dirent.h>
int main(int argc,char** argv)
{
DIR *dirptr = NULL;
struct dirent *entry;
if(argc<2)
{
printf("the command need a dirname\n");
return 1;
}
if(argc>2)
{
printf("the program can only deal with one dir at once\n");
return 1;
}
if((dirptr = opendir(argv[1])) == NULL)
{
printf("open dir error !\n");
return 1;
}
else
{
while (entry = readdir(dirptr))
{
printf("%s\n", entry->d_name);
}
closedir(dirptr);
}
return 0;
}

gcc  opendir.c -o opendir

[root@iZ94tdwp8ysZ server]# ./opendir U-boot2013
.
u-boot-2013.04-rc1.tar.bz2
u-boot-2013.04-rc1
..

[root@iZ94tdwp8ysZ server]# ./opendir /root/server
nonblock.c
opendir.c
server3.c
libclient.c
opendir
pthreadserver.c
libclient
selectc
test_ascii
demo_client.c
.
telnetclient
server3.c.org
nonblock
zieckey_fifo
nohup.out
selects.c
pthreadserver
selectc.c
U-boot2013
telnetclient.c
localhost.sql
makefile
demo_client
telnet_server
server3_nonblock.c
test_ascii.c
selects
libserver.c
make.sh
telnet_server.c
server3
crc.c
function_mysql.c
..
libserver
log.c