Open System Services System Calls Reference Manual (G06.28+, H06.05+)

fcntl(2) OSS System Calls Reference Manual
F_SETFD Returns the value 0 (zero).
F_SETFL Returns the value 0 (zero).
F_SETLK Returns the value 0 (zero).
F_SETLK64 Returns the value 0 (zero).
F_SETLKW Returns the value 0 (zero).
F_SETLKW64
Returns the value 0 (zero).
F_SETOWN Returns the value 0 (zero).
If the fcntl() function fails, the value -1 is returned, and errno is set to indicate the error.
ERRORS
If any of these conditions occurs, the fcntl() function sets errno to the corresponding value:
[EAGAIN] The request parameter is F_SETLK or F_SETLK64, the type of lock (l_type)is
shared (F_RDLCK) or exclusive (F_WRLCK), and a segment of a file to be
locked is already exclusive-locked by another process.
The request parameter is is F_SETLK or F_SETLK64, the type of lock is
exclusive, and some portion of a segment of a file to be locked is already
shared-locked or exclusive-locked by another process.
[EBADF] One of these conditions exists:
• The request parameter is F_SETLK, F_SETLK64, F_SETLKW,or
F_SETLKW64, the type of lock is shared (F_RDLCK), and filedes is
not a valid file descriptor open for reading.
• The type of lock is exclusive (F_WRLCK), and filedes is not a valid file
descriptor open for writing.
• The filedes parameter is not a valid open file descriptor.
[ECONNRESET]
One of these conditions occurred:
• The transport-provider process for this socket is no longer available.
• The TCP/IP subsystem for this socket is no longer available.
• The peer socket forcibly closed the connection.
The file descriptor specified by the filedes parameter can only be closed.
[EFAULT] The argument2 parameter is an invalid address.
[EINTR] The request parameter is F_SETLKW or F_SETLKW64, and the fcntl() func-
tion was interrupted by a signal that was caught.
[EINVAL] One of these conditions exists:
• The request parameter is F_DUPFD, and the argument1 parameter is
negative or greater than or equal to the maximum number of open file
descriptors permitted.
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