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creat(3p) [xfree86 man page]

CREAT(3P)                                                    POSIX Programmer's Manual                                                   CREAT(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. 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) shall be equivalent to: open(path, O_WRONLY|O_CREAT|O_TRUNC, mode) RETURN VALUE
Refer to open(). ERRORS
Refer to open(). The following sections are informative. EXAMPLES
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 oth- ers. 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); ... APPLICATION USAGE
None. RATIONALE
The creat() function is redundant. Its services are also provided by the open() function. It has been included primarily for historical purposes since many existing applications depend on it. It is best considered a part of the C binding rather than a function that should be provided in other languages. FUTURE DIRECTIONS
None. SEE ALSO
open(), the Base Definitions volume of IEEE Std 1003.1-2001, <fcntl.h>, <sys/stat.h>, <sys/types.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 CREAT(3P)

Check Out this Related Man Page

UMASK(3P)						     POSIX Programmer's Manual							 UMASK(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
umask - set and get the file mode creation mask SYNOPSIS
#include <sys/stat.h> mode_t umask(mode_t cmask); DESCRIPTION
The umask() function shall set the process' file mode creation mask to cmask and return the previous value of the mask. Only the file per- mission bits of cmask (see <sys/stat.h>) are used; the meaning of the other bits is implementation-defined. The process' file mode creation mask is used during open(), creat(), mkdir(), and mkfifo() to turn off permission bits in the mode argument supplied. Bit positions that are set in cmask are cleared in the mode of the created file. RETURN VALUE
The file permission bits in the value returned by umask() shall be the previous value of the file mode creation mask. The state of any other bits in that value is unspecified, except that a subsequent call to umask() with the returned value as cmask shall leave the state of the mask the same as its state before the first call, including any unspecified use of those bits. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
Unsigned argument and return types for umask() were proposed. The return type and the argument were both changed to mode_t. Historical implementations have made use of additional bits in cmask for their implementation-defined purposes. The addition of the text that the meaning of other bits of the field is implementation-defined permits these implementations to conform to this volume of IEEE Std 1003.1-2001. FUTURE DIRECTIONS
None. SEE ALSO
creat(), mkdir(), mkfifo(), open(), the Base Definitions volume of IEEE Std 1003.1-2001, <sys/stat.h>, <sys/types.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 UMASK(3P)
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