HP-UX Reference (11i v1 00/12) - 2 System Calls (vol 5)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD

/build/1111/BRICK/man2/!!!intro.2

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write(2) write(2)

[EDEADLK] A resource deadlock would occur as a result of this operation (see lockf(2) and

fcntl(2)).

[EDQUOT] User’s disk quota block limit has been reached for this ﬁle system.

[EFBIG] The ﬁle is a regular ﬁle and nbyte is greater than zero and the starting position is

greater than or equal to the offset maximum established in the open ﬁle description

associated with ﬁldes.

[ENOLCK] The system record lock table is full, preventing the write from sleeping until the

blocking record lock is removed.

[ENOSPC] Not enough space on the ﬁle system. The process does not possess the limit

effective privilege to override this restriction.

If writev() fails, the ﬁle offset remains unchanged and errno is set to one of the following values:

[EFAULT] iov_base or iov points outside of the allocated address space. The reliable detection of

this error is implementation dependent.

[EINVAL] One of the iov_len values in the iov array is negative.

If write() or writev() fails, the ﬁle offset is updated to reﬂect the amount of data transferred and

errno is set to one of the following values.

[EFAULT] buf points outside the process’s allocated address space. The reliable detection of this

error is implementation dependent.

EXAMPLES

Assuming a process opened a ﬁle for writing, the following call to write() attempts to write mybufsize

bytes to the ﬁle from the buffer to which mybuf points.

#include <string.h>

int fildes;

size_t mybufsize;

ssize_t nbytes;

char *mybuf = "aeiou and sometimes y";

mybufsize = (size_t)strlen (mybuf);

nbytes = write (fildes, (void *)mybuf, mybufsize);

WARNINGS

Check signal(5) for the appropriateness of signal references on systems that support

sigvector() (see

sigvector(2)).

sigvector() can affect the behavior described on this page.

Character special devices, and raw disks in particular, apply constraints on how write() can be used.

See speciﬁc Section 7 manual entries for details on particular devices.

AUTHOR

write() was developed by HP, AT&T, and the University of California, Berkeley.