CREAT(2) — HP-UX

NAME

creat − create a new file or rewrite an existing one

SYNOPSIS

int creat (path, mode)
char ∗path;
int mode;

DESCRIPTION

Creat creates a new ordinary file or prepares to rewrite an existing file named by the path name pointed to by path.

If the file exists, the length is truncated to 0 and the mode and owner are unchanged. Otherwise, the file’s owner ID is set to the effective user ID, of the process, the group ID is set to the effective group ID, of the process, and the low-order 12 bits of the file mode are set to the value of mode modified as follows:

All bits set in the process’s file mode creation mask are cleared. See umask(2).

The "save text image after execution bit" of the mode are cleared. See chmod(2).

Upon successful completion, the file descriptor is returned and the file is open for writing (only), even if the mode does not permit writing. The file pointer is set to the beginning of the file. The file descriptor is set to remain open across exec system calls. See fcntl(2). No process may have more than a system defined maximum number of files open simultaneously. This is discussed under open(2). A new file may be created with a mode that forbids writing.

ERRORS

Creat will fail if one or more of the following are true:

[ENOSPC] Not enough space on the file system.

[ENOTDIR] A component of the path prefix is not a directory.

[ENOENT] The named file does not exist (for example, path is null, or a component of path does not exist).

[EACCES] Search permission is denied on a component of the path prefix.

[EACCES] The file does not exist and the directory in which the file is to be created does not permit writing.

[EROFS] The named file resides or would reside on a read-only file system.

[ETXTBSY] The file is a pure procedure (shared text) file that is being executed.

[EACCES] The file exists and write permission is denied.

[EISDIR] The named file is an existing directory.

[EMFILE] More than the maximum number of file descriptors are currently open.

[EFAULT] Path points outside the allocated address space of the process. The reliable detection of this error will be implementation dependent.

[ENFILE] The system file table is full.

[ENXIO] The named file is a character special or block special file, and the device associated with this special file does not exist.

[ENAMETOOLONG] The path specified exceeds MAXPATHLEN characters.

[EAGAIN] The file exists, enforcement mode file and record locking is set and there are outstanding record locks on the file.

[ELOOP] Too many symbolic links were encountered in translating the path name.

RETURN VALUE

Upon successful completion, a non-negative integer, namely the file descriptor, is returned. Otherwise, a value of −1 is returned and errno is set to indicate the error.

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