linux C 中 mkdir

I.Linux C 创建目录函数mkdir的mode设置问题

函数原型：

#include <sys/stat.h>

int mkdir(const char *path, mode_t mode);

参数：

path是目录名

mode是目录权限

返回值：

返回0 表示成功， 返回 -1表示错误，并且会设置errno值。

mode模式位：

mode 表示新目录的权限，可以取以下值：

S_IRUSR

S_IREAD

S_IWUSR

S_IWRITE

S_IXUSR

S_IEXEC

S_IRWXU

This is equivalent to (S_IRUSR | S_IWUSR | S_IXUSR).

S_IRGRP

Read permission bit for the group owner of the file. Usually 040.

S_IWGRP

Write permission bit for the group owner of the file. Usually 020.

S_IXGRP

Execute or search permission bit for the group owner of the file. Usually 010.

S_IRWXG

This is equivalent to (S_IRGRP | S_IWGRP | S_IXGRP).

S_IROTH

Read permission bit for other users. Usually 04.

S_IWOTH

Write permission bit for other users. Usually 02.

S_IXOTH

Execute or search permission bit for other users. Usually 01.

S_IRWXO

This is equivalent to (S_IROTH | S_IWOTH | S_IXOTH).

S_ISUID

This is the set-user-ID on execute bit, usually 04000. See How Change Persona.

S_ISGID

This is the set-group-ID on execute bit, usually 02000. See How Change Persona.

S_ISVTX

This is the sticky bit, usually 01000.

例子：

#include <sys/types.h> #include <sys/stat.h>

int status;

status = mkdir("/home/newdir", S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);

这样就创建了一个newdir目录，权限通过ls -al 查看为

drwxr-xr-x

跟用linux命令mkdir创建的目录权限位一致。

II. linux下C语言创建多级目录

int CreateDir(const char *sPathName)

{

char DirName[256];

strcpy(DirName, sPathName);

int i,len = strlen(DirName);

if(DirName[len-1]!='/')

strcat(DirName, "/");

len = strlen(DirName);

for(i=1; i<len; i++)

{

if(DirName[i]=='/')

{

DirName[i] = 0;

if( access(DirName, NULL)!=0 )

{

if(mkdir(DirName, 0755)==-1)

{

perror("mkdir error");

return -1;

}

}

DirName[i] = '/';

}

}

return 0;

}

III.linux c 编程：创建一个线程，监视某个目录，一旦目录里出现新的文件，就将文件转移到指定的目录里去。

/*

头文件

*/

#define SRCPATH "srcpath/"

#define DSTPATH "dstpath/"

int movefile()

{

DIR *dir;

struct dirent *dt;

FILE *fp1,*fp2;

char filename1[256],filename2[256];

char buf[1024];

int readsize,writesize;

if((dir = opendir(SRCPATH)) == NULL)

{

printf("opendir %s error\n",SRCPATH);

return -1;

}

memset(filename1,0,sizeof(filename1));

strcpy(filename1,SRCPATH);

memset(filename2,0,sizeof(filename2));

strcpy(filename2,DSTPATH);

while(1)

{

while((dt = readdir(dir)) != NULL)

{

if(strcmp(dt->d_name,".")==0||strcmp(dt->d_name,"..")==0)

{

continue;

}

//如果这个目录里 还有目录，可以在这加判断

//这里假设初始为空目录

strcat(filename1,dt->d_name);

strcat(filename2,dt->d_name);

//如果进程资源较少可以直接用linux系统命令

fp1 = fopen(filename1,"rb");

if(fp1==NULL)

{

printf("open %s failed /n",filename1);

return -1;

}

fp2 = fopen(filename2,"wb");

if(fp2==NULL)

{

printf("open %s failed /n",filename2);

fclose(fp1);

return -1;

}

while((readsize = fread(buf,sizeof(buf),1,fp1))>0)

{

//total += readsize;

memset(buf,0,sizeof(buf));

writesize = fwrite(buf,sizeof(buf),1,fp2);

if(writesize!==readsize)

{

printf("write error");

return -2;

fclose(fp1);

fclose(fp2);

}

}

fclose(fp1);

fclose(fp2);

rmdir(filename2);

}

}

}

int main(int argc,char **argv)

{

pthread_t id1;

int ret;

ret = pthread_create(&id1, NULL, (void*)movefile, NULL);

return ret;

}