CREAT(2) System Calls CREAT(2)
creat - create a new file or rewrite an existing one
#include <sys/stat.h>
#include <fcntl.h>
int creat(const char *path, mode_t mode);
The function call
creat(path, mode)
is equivalent to:
open(path, O_WRONLY | O_CREAT | O_TRUNC, mode)
Refer to open(2).
Refer to open(2).
The following example creates the file /tmp/file with read and write
permissions for the file owner and read permission for group and
others. The resulting file descriptor is assigned to the fd variable.
#include <fcntl.h>
...
int fd;
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
char *filename = "/tmp/file";
...
fd = creat(filename, mode);
...
The creat() function has a transitional interface for 64-bit file
offsets. See lf64(7).
See attributes(7) for descriptions of the following attributes:
+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Standard |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+
open(2), attributes(7), largefile(7), lf64(7), standards(7)
March 25, 2002 CREAT(2)
NAME
creat - create a new file or rewrite an existing one
SYNOPSIS
#include <sys/stat.h>
#include <fcntl.h>
int creat(const char *path, mode_t mode);
DESCRIPTION
The function call
creat(path, mode)
is equivalent to:
open(path, O_WRONLY | O_CREAT | O_TRUNC, mode)
RETURN VALUES
Refer to open(2).
ERRORS
Refer to open(2).
EXAMPLES
Example 1: Creating a File
The following example creates the file /tmp/file with read and write
permissions for the file owner and read permission for group and
others. The resulting file descriptor is assigned to the fd variable.
#include <fcntl.h>
...
int fd;
mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
char *filename = "/tmp/file";
...
fd = creat(filename, mode);
...
USAGE
The creat() function has a transitional interface for 64-bit file
offsets. See lf64(7).
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Standard |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+
SEE ALSO
open(2), attributes(7), largefile(7), lf64(7), standards(7)
March 25, 2002 CREAT(2)