#include <sys/stat.h> int mknod(const char *path, mode_t mode, dev_t dev);
int mknodat(int fd, const char *path, mode_t mode, dev_t dev);
The file type is specified in mode by the S_IFMT bits, which must be set to one of the following values:
The file access permissions are specified in mode by the 0007777 bits, and may be constructed by a bitwise OR operation of the following values:
|S_ISUID||04000||Set user ID on execution.|
|S_ISGID||020#0||Set group ID on execution if # is 7, 5, 3, or 1. Enable mandatory file/record locking if # is 6, 4, 2, or 0|
|S_ISVTX||01000||On directories, restricted deletion flag; on regular files on a UFS file system, do not cache flag.|
|S_IRWXU||00700||Read, write, execute by owner.|
|S_IRUSR||00400||Read by owner.|
|S_IWUSR||00200||Write by owner.|
|S_IXUSR||00100||Execute (search if a directory) by owner.|
|S_IRWXG||00070||Read, write, execute by group.|
|S_IRGRP||00040||Read by group.|
|S_IWGRP||00020||Write by group.|
|S_IXGRP||00010||Execute by group.|
|S_IRWXO||00007||Read, write, execute (search) by others.|
|S_IROTH||00004||Read by others.|
|S_IWOTH||00002||Write by others|
|S_IXOTH||00001||Execute by others.|
The owner ID of the file is set to the effective user ID of the process. The group ID of the file is set to the effective group ID of the process. However, if the S_ISGID bit is set in the parent directory, then the group ID of the file is inherited from the parent. If the group ID of the new file does not match the effective group ID or one of the supplementary group IDs, the S_ISGID bit is cleared.
The access permission bits of mode are modified by the process's file mode creation mask: all bits set in the process's file mode creation mask are cleared (see umask(2)). If mode indicates a block or character special file, dev is a configuration-dependent specification of a character or block I/O device. If mode does not indicate a block special or character special device, dev is ignored. See makedev(3C).
If path is a symbolic link, it is not followed.
The mknodat() function is similar to mknod(); however, when path is a relative path, it is resolved starting at the directory represented by the file descriptor fd. To start at the current working directory, fd may be set to the special value AT_FDCWD.
The mknodat() function will fail if:
The mknod() function may fail if:
Doors are created using door_create(3C) and can be attached to the file system using fattach(3C). Symbolic links can be created using symlink(2). An endpoint for communication can be created using socket(3SOCKET).
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
|February 19, 2004||OmniOS|