2004-11-03 13:51:07 +00:00
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.\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>.
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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2007-04-12 22:42:49 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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2007-04-12 22:42:49 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.TH FPURGE 3 2001-12-15 "" "Linux Programmer's Manual"
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.SH NAME
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fpurge, __fpurge \- purge a stream
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.SH SYNOPSIS
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.nf
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/* unsupported */
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.B #include <stdio.h>
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.sp
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.BI "int fpurge(FILE *" stream );
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.sp
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/* supported */
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.B #include <stdio.h>
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.br
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.B #include <stdio_ext.h>
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.sp
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.BI "void __fpurge(FILE *" stream );
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.fi
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.SH DESCRIPTION
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The function
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2005-10-19 07:07:02 +00:00
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.BR fpurge ()
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clears the buffers of the given stream.
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For output streams this discards any unwritten output.
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For input streams this discards any input read from the underlying object
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but not yet obtained via
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.BR getc (3);
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2007-05-12 12:58:31 +00:00
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this includes any text pushed back via
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.BR ungetc (3).
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See also
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.BR fflush (3).
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.LP
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The function
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.BR __fpurge ()
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2004-11-03 13:51:07 +00:00
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does precisely the same, but without returning a value.
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.SH "RETURN VALUE"
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Upon successful completion
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.BR fpurge ()
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2004-11-03 13:51:07 +00:00
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returns 0.
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On error, it returns \-1 and sets
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.I errno
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appropriately.
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.SH ERRORS
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.TP
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.B EBADF
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.I stream
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is not an open stream.
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.SH "CONFORMING TO"
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accept.2, execve.2, futimesat.2, getresuid.2, getrlimit.2, madvise.2, mq_getsetattr.2, msgctl.2, nice.2, open.2, poll.2, setresuid.2, shmctl.2, sigaction.2, times.2, utimensat.2, __setfpucw.3, atoi.3, endian.3, err.3, euidaccess.3, fenv.3, fopencookie.3, fpurge.3, getgrouplist.3, getutmp.3, j0.3, lgamma.3, netlink.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_cleanup_push_defer_np.3, pthread_getattr_np.3, pthread_kill_other_threads_np.3, pthread_setaffinity_np.3, pthread_tryjoin_np.3, pthread_yield.3, random_r.3, readdir.3, rtnetlink.3, scanf.3, setenv.3, significand.3, sigsetops.3, strerror.3, strstr.3, sysv_signal.3, termios.3, timegm.3, unlocked_stdio.3, y0.3, locale.5, bootparam.7, feature_test_macros.7, ip.7, locale.7, pthreads.7, rtld-audit.7, nscd.8: Global fix: s/non-standard/nonstandard/
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-01-16 16:37:52 +00:00
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These functions are nonstandard and not portable.
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The function
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2005-11-02 11:34:24 +00:00
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.BR fpurge ()
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2005-07-18 15:05:56 +00:00
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was introduced in 4.4BSD and is not available under Linux.
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2004-11-03 13:51:07 +00:00
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The function
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2005-11-02 11:34:24 +00:00
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.BR __fpurge ()
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2004-11-03 13:51:07 +00:00
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was introduced in Solaris, and is present in glibc 2.1.95 and later.
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.SH NOTES
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Usually it is a mistake to want to discard input buffers.
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.SH "SEE ALSO"
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2007-06-02 13:06:33 +00:00
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.\" .BR fclean (3),
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.BR fflush (3),
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.BR setbuf (3),
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.BR stdio_ext (3)
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