MKNODATSection: Linux Programmer's Manual (2)
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NAMEmknodat - create a special or ordinary file relative to a directory file descriptor
#define _ATFILE_SOURCE #include <sys/stat.h> int mknodat(int dirfd, const char *pathname, mode_t mode, dev_t dev);
DESCRIPTIONThe mknodat() system call operates in exactly the same way as mknod(2), except for the differences described in this manual page.
If the pathname given in pathname is relative, then it is interpreted relative to the directory referred to by the file descriptor dirfd (rather than relative to the current working directory of the calling process, as is done by mknod(2) for a relative pathname).
If pathname is relative and dirfd is the special value AT_FDCWD, then pathname is interpreted relative to the current working directory of the calling process (like mknod(2)).
RETURN VALUEOn success, mknodat() returns 0. On error, -1 is returned and errno is set to indicate the error.
ERRORSThe same errors that occur for mknod(2) can also occur for mknodat(). The following additional errors can occur for mknodat():
- dirfd is not a valid file descriptor.
- pathname is relative and dirfd is a file descriptor referring to a file other than a directory.
VERSIONSmknodat() was added to Linux in kernel 2.6.16.
CONFORMING TOThis system call is non-standard but is proposed for inclusion in a future revision of POSIX.1.
NOTESSee openat(2) for an explanation of the need for mknodat().
SEE ALSOmknod(2), openat(2), path_resolution(7)