mirror of
https://https.git.savannah.gnu.org/git/bash.git
synced 2026-07-14 07:30:49 +02:00
commit bash-20090416 snapshot
This commit is contained in:
Chet Ramey
+46
-21
@@ -31,7 +31,7 @@
|
||||
#endif
|
||||
extern int fpurge __P((FILE *stream));
|
||||
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Solaris >= 7 */
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Haiku, Solaris >= 7 */
|
||||
# include <stdio_ext.h>
|
||||
#endif
|
||||
#include <stdlib.h>
|
||||
@@ -39,13 +39,13 @@ extern int fpurge __P((FILE *stream));
|
||||
int
|
||||
fpurge (FILE *fp)
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||||
{
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Solaris >= 7 */
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Haiku, Solaris >= 7 */
|
||||
|
||||
__fpurge (fp);
|
||||
/* The __fpurge function does not have a return value. */
|
||||
return 0;
|
||||
|
||||
#elif HAVE_FPURGE /* FreeBSD, NetBSD, OpenBSD, MacOS X */
|
||||
#elif HAVE_FPURGE /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X */
|
||||
|
||||
/* Call the system's fpurge function. */
|
||||
# undef fpurge
|
||||
@@ -53,7 +53,7 @@ fpurge (FILE *fp)
|
||||
extern int fpurge (FILE *);
|
||||
# endif
|
||||
int result = fpurge (fp);
|
||||
# if defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
|
||||
# if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
|
||||
if (result == 0)
|
||||
/* Correct the invariants that fpurge broke.
|
||||
<stdio.h> on BSD systems says:
|
||||
@@ -71,7 +71,7 @@ fpurge (FILE *fp)
|
||||
/* Most systems provide FILE as a struct and the necessary bitmask in
|
||||
<stdio.h>, because they need it for implementing getc() and putc() as
|
||||
fast macros. */
|
||||
# if defined _IO_ferror_unlocked /* GNU libc, BeOS */
|
||||
# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
|
||||
fp->_IO_read_end = fp->_IO_read_ptr;
|
||||
fp->_IO_write_ptr = fp->_IO_write_base;
|
||||
/* Avoid memory leak when there is an active ungetc buffer. */
|
||||
@@ -81,28 +81,27 @@ fpurge (FILE *fp)
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||||
fp->_IO_save_base = NULL;
|
||||
}
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||||
return 0;
|
||||
# elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
|
||||
fp->_p = fp->_bf._base;
|
||||
fp->_r = 0;
|
||||
fp->_w = ((fp->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
|
||||
? fp->_bf._size
|
||||
: 0);
|
||||
# elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
|
||||
fp_->_p = fp_->_bf._base;
|
||||
fp_->_r = 0;
|
||||
fp_->_w = ((fp_->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
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||||
? fp_->_bf._size
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||||
: 0);
|
||||
/* Avoid memory leak when there is an active ungetc buffer. */
|
||||
# if defined __NetBSD__ || defined __OpenBSD__ /* NetBSD, OpenBSD */
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||||
/* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
|
||||
and <http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> */
|
||||
# define fp_ub ((struct { struct __sbuf _ub; } *) fp->_ext._base)->_ub
|
||||
# else /* FreeBSD, MacOS X, Cygwin */
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||||
# define fp_ub fp->_ub
|
||||
# endif
|
||||
if (fp_ub._base != NULL)
|
||||
{
|
||||
if (fp_ub._base != fp->_ubuf)
|
||||
if (fp_ub._base != fp_->_ubuf)
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||||
free (fp_ub._base);
|
||||
fp_ub._base = NULL;
|
||||
}
|
||||
return 0;
|
||||
# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
|
||||
# elif defined __EMX__ /* emx+gcc */
|
||||
fp->_ptr = fp->_buffer;
|
||||
fp->_rcount = 0;
|
||||
fp->_wcount = 0;
|
||||
fp->_ungetc_count = 0;
|
||||
return 0;
|
||||
# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
|
||||
fp->_ptr = fp->_base;
|
||||
if (fp->_ptr != NULL)
|
||||
fp->_cnt = 0;
|
||||
@@ -115,8 +114,34 @@ fpurge (FILE *fp)
|
||||
fp->__bufpos = fp->__bufread;
|
||||
# endif
|
||||
return 0;
|
||||
# elif defined __QNX__ /* QNX */
|
||||
fp->_Rback = fp->_Back + sizeof (fp->_Back);
|
||||
fp->_Rsave = NULL;
|
||||
if (fp->_Mode & 0x2000 /* _MWRITE */)
|
||||
/* fp->_Buf <= fp->_Next <= fp->_Wend */
|
||||
fp->_Next = fp->_Buf;
|
||||
else
|
||||
/* fp->_Buf <= fp->_Next <= fp->_Rend */
|
||||
fp->_Rend = fp->_Next;
|
||||
return 0;
|
||||
# elif defined __MINT__ /* Atari FreeMiNT */
|
||||
if (fp->__pushed_back)
|
||||
{
|
||||
fp->__bufp = fp->__pushback_bufp;
|
||||
fp->__pushed_back = 0;
|
||||
}
|
||||
/* Preserve the current file position. */
|
||||
if (fp->__target != -1)
|
||||
fp->__target += fp->__bufp - fp->__buffer;
|
||||
fp->__bufp = fp->__buffer;
|
||||
/* Nothing in the buffer, next getc is nontrivial. */
|
||||
fp->__get_limit = fp->__bufp;
|
||||
/* Nothing in the buffer, next putc is nontrivial. */
|
||||
fp->__put_limit = fp->__buffer;
|
||||
return 0;
|
||||
# else
|
||||
#error "Please port gnulib fpurge.c to your platform! Look at the definitions of fflush, setvbuf and ungetc on your system, then report this to bug-gnulib."
|
||||
# warning "Please port gnulib fpurge.c to your platform! Look at the definitions of fflush, setvbuf and ungetc on your system, then report this to bug-gnulib."
|
||||
return 0;
|
||||
# endif
|
||||
|
||||
#endif
|
||||
|
||||
@@ -0,0 +1,123 @@
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||||
/* fpurge - Flushing buffers of a FILE stream. */
|
||||
|
||||
/* Copyright (C) 2007 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GNU Bash, the Bourne Again SHell.
|
||||
|
||||
Bash is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
Bash is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with Bash. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <config.h>
|
||||
|
||||
#include "stdc.h"
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
/* Specification. Same as in ../../externs.h. */
|
||||
#define NEED_FPURGE_DECL
|
||||
#if HAVE_FPURGE
|
||||
# define fpurge _bash_fpurge
|
||||
#endif
|
||||
extern int fpurge __P((FILE *stream));
|
||||
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Solaris >= 7 */
|
||||
# include <stdio_ext.h>
|
||||
#endif
|
||||
#include <stdlib.h>
|
||||
|
||||
int
|
||||
fpurge (FILE *fp)
|
||||
{
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Solaris >= 7 */
|
||||
|
||||
__fpurge (fp);
|
||||
/* The __fpurge function does not have a return value. */
|
||||
return 0;
|
||||
|
||||
#elif HAVE_FPURGE /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X */
|
||||
|
||||
/* Call the system's fpurge function. */
|
||||
# undef fpurge
|
||||
# if !HAVE_DECL_FPURGE
|
||||
extern int fpurge (FILE *);
|
||||
# endif
|
||||
int result = fpurge (fp);
|
||||
# if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
|
||||
if (result == 0)
|
||||
/* Correct the invariants that fpurge broke.
|
||||
<stdio.h> on BSD systems says:
|
||||
"The following always hold: if _flags & __SRD, _w is 0."
|
||||
If this invariant is not fulfilled and the stream is read-write but
|
||||
currently writing, subsequent putc or fputc calls will write directly
|
||||
into the buffer, although they shouldn't be allowed to. */
|
||||
if ((fp->_flags & __SRD) != 0)
|
||||
fp->_w = 0;
|
||||
# endif
|
||||
return result;
|
||||
|
||||
#else
|
||||
|
||||
/* Most systems provide FILE as a struct and the necessary bitmask in
|
||||
<stdio.h>, because they need it for implementing getc() and putc() as
|
||||
fast macros. */
|
||||
# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Linux libc5 */
|
||||
fp->_IO_read_end = fp->_IO_read_ptr;
|
||||
fp->_IO_write_ptr = fp->_IO_write_base;
|
||||
/* Avoid memory leak when there is an active ungetc buffer. */
|
||||
if (fp->_IO_save_base != NULL)
|
||||
{
|
||||
free (fp->_IO_save_base);
|
||||
fp->_IO_save_base = NULL;
|
||||
}
|
||||
return 0;
|
||||
# elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
|
||||
fp->_p = fp->_bf._base;
|
||||
fp->_r = 0;
|
||||
fp->_w = ((fp->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
|
||||
? fp->_bf._size
|
||||
: 0);
|
||||
/* Avoid memory leak when there is an active ungetc buffer. */
|
||||
# if defined __NetBSD__ || defined __OpenBSD__ /* NetBSD, OpenBSD */
|
||||
/* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
|
||||
and <http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> */
|
||||
# define fp_ub ((struct { struct __sbuf _ub; } *) fp->_ext._base)->_ub
|
||||
# else /* FreeBSD, MacOS X, Cygwin */
|
||||
# define fp_ub fp->_ub
|
||||
# endif
|
||||
if (fp_ub._base != NULL)
|
||||
{
|
||||
if (fp_ub._base != fp->_ubuf)
|
||||
free (fp_ub._base);
|
||||
fp_ub._base = NULL;
|
||||
}
|
||||
return 0;
|
||||
# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
|
||||
fp->_ptr = fp->_base;
|
||||
if (fp->_ptr != NULL)
|
||||
fp->_cnt = 0;
|
||||
return 0;
|
||||
# elif defined __UCLIBC__ /* uClibc */
|
||||
# ifdef __STDIO_BUFFERS
|
||||
if (fp->__modeflags & __FLAG_WRITING)
|
||||
fp->__bufpos = fp->__bufstart;
|
||||
else if (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING))
|
||||
fp->__bufpos = fp->__bufread;
|
||||
# endif
|
||||
return 0;
|
||||
# else
|
||||
#error "Please port gnulib fpurge.c to your platform! Look at the definitions of fflush, setvbuf and ungetc on your system, then report this to bug-gnulib."
|
||||
# endif
|
||||
|
||||
#endif
|
||||
}
|
||||
@@ -0,0 +1,147 @@
|
||||
/* fpurge - Flushing buffers of a FILE stream. */
|
||||
|
||||
/* Copyright (C) 2007 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GNU Bash, the Bourne Again SHell.
|
||||
|
||||
Bash is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
Bash is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with Bash. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <config.h>
|
||||
|
||||
#include "stdc.h"
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
/* Specification. Same as in ../../externs.h. */
|
||||
#define NEED_FPURGE_DECL
|
||||
#if HAVE_FPURGE
|
||||
# define fpurge _bash_fpurge
|
||||
#endif
|
||||
extern int fpurge __P((FILE *stream));
|
||||
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Haiku, Solaris >= 7 */
|
||||
# include <stdio_ext.h>
|
||||
#endif
|
||||
#include <stdlib.h>
|
||||
|
||||
int
|
||||
fpurge (FILE *fp)
|
||||
{
|
||||
#if HAVE___FPURGE /* glibc >= 2.2, Haiku, Solaris >= 7 */
|
||||
|
||||
__fpurge (fp);
|
||||
/* The __fpurge function does not have a return value. */
|
||||
return 0;
|
||||
|
||||
#elif HAVE_FPURGE /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X */
|
||||
|
||||
/* Call the system's fpurge function. */
|
||||
# undef fpurge
|
||||
# if !HAVE_DECL_FPURGE
|
||||
extern int fpurge (FILE *);
|
||||
# endif
|
||||
int result = fpurge (fp);
|
||||
# if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
|
||||
if (result == 0)
|
||||
/* Correct the invariants that fpurge broke.
|
||||
<stdio.h> on BSD systems says:
|
||||
"The following always hold: if _flags & __SRD, _w is 0."
|
||||
If this invariant is not fulfilled and the stream is read-write but
|
||||
currently writing, subsequent putc or fputc calls will write directly
|
||||
into the buffer, although they shouldn't be allowed to. */
|
||||
if ((fp->_flags & __SRD) != 0)
|
||||
fp->_w = 0;
|
||||
# endif
|
||||
return result;
|
||||
|
||||
#else
|
||||
|
||||
/* Most systems provide FILE as a struct and the necessary bitmask in
|
||||
<stdio.h>, because they need it for implementing getc() and putc() as
|
||||
fast macros. */
|
||||
# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
|
||||
fp->_IO_read_end = fp->_IO_read_ptr;
|
||||
fp->_IO_write_ptr = fp->_IO_write_base;
|
||||
/* Avoid memory leak when there is an active ungetc buffer. */
|
||||
if (fp->_IO_save_base != NULL)
|
||||
{
|
||||
free (fp->_IO_save_base);
|
||||
fp->_IO_save_base = NULL;
|
||||
}
|
||||
return 0;
|
||||
# elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
|
||||
fp_->_p = fp_->_bf._base;
|
||||
fp_->_r = 0;
|
||||
fp_->_w = ((fp_->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
|
||||
? fp_->_bf._size
|
||||
: 0);
|
||||
/* Avoid memory leak when there is an active ungetc buffer. */
|
||||
if (fp_ub._base != NULL)
|
||||
{
|
||||
if (fp_ub._base != fp_->_ubuf)
|
||||
free (fp_ub._base);
|
||||
fp_ub._base = NULL;
|
||||
}
|
||||
return 0;
|
||||
# elif defined __EMX__ /* emx+gcc */
|
||||
fp->_ptr = fp->_buffer;
|
||||
fp->_rcount = 0;
|
||||
fp->_wcount = 0;
|
||||
fp->_ungetc_count = 0;
|
||||
return 0;
|
||||
# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
|
||||
fp->_ptr = fp->_base;
|
||||
if (fp->_ptr != NULL)
|
||||
fp->_cnt = 0;
|
||||
return 0;
|
||||
# elif defined __UCLIBC__ /* uClibc */
|
||||
# ifdef __STDIO_BUFFERS
|
||||
if (fp->__modeflags & __FLAG_WRITING)
|
||||
fp->__bufpos = fp->__bufstart;
|
||||
else if (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING))
|
||||
fp->__bufpos = fp->__bufread;
|
||||
# endif
|
||||
return 0;
|
||||
# elif defined __QNX__ /* QNX */
|
||||
fp->_Rback = fp->_Back + sizeof (fp->_Back);
|
||||
fp->_Rsave = NULL;
|
||||
if (fp->_Mode & 0x2000 /* _MWRITE */)
|
||||
/* fp->_Buf <= fp->_Next <= fp->_Wend */
|
||||
fp->_Next = fp->_Buf;
|
||||
else
|
||||
/* fp->_Buf <= fp->_Next <= fp->_Rend */
|
||||
fp->_Rend = fp->_Next;
|
||||
return 0;
|
||||
# elif defined __MINT__ /* Atari FreeMiNT */
|
||||
if (fp->__pushed_back)
|
||||
{
|
||||
fp->__bufp = fp->__pushback_bufp;
|
||||
fp->__pushed_back = 0;
|
||||
}
|
||||
/* Preserve the current file position. */
|
||||
if (fp->__target != -1)
|
||||
fp->__target += fp->__bufp - fp->__buffer;
|
||||
fp->__bufp = fp->__buffer;
|
||||
/* Nothing in the buffer, next getc is nontrivial. */
|
||||
fp->__get_limit = fp->__bufp;
|
||||
/* Nothing in the buffer, next putc is nontrivial. */
|
||||
fp->__put_limit = fp->__buffer;
|
||||
return 0;
|
||||
# else
|
||||
#error "Please port gnulib fpurge.c to your platform! Look at the definitions of fflush, setvbuf and ungetc on your system, then report this to bug-gnulib."
|
||||
# endif
|
||||
|
||||
#endif
|
||||
}
|
||||
@@ -39,14 +39,7 @@
|
||||
|
||||
#include "bashansi.h"
|
||||
|
||||
#if defined (HAVE_SELECT)
|
||||
# if !defined (HAVE_SYS_SELECT_H) || !defined (M_UNIX)
|
||||
# include <sys/time.h>
|
||||
# endif
|
||||
#endif /* HAVE_SELECT */
|
||||
#if defined (HAVE_SYS_SELECT_H)
|
||||
# include <sys/select.h>
|
||||
#endif
|
||||
#include "posixselect.h"
|
||||
|
||||
#if defined (FIONREAD_IN_SYS_IOCTL)
|
||||
# include <sys/ioctl.h>
|
||||
|
||||
@@ -0,0 +1,105 @@
|
||||
/* input_avail.c -- check whether or not data is available for reading on a
|
||||
specified file descriptor. */
|
||||
|
||||
/* Copyright (C) 2008,2009 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GNU Bash, the Bourne Again SHell.
|
||||
|
||||
Bash is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
Bash is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with Bash. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#if defined (__TANDEM)
|
||||
# include <floss.h>
|
||||
#endif
|
||||
|
||||
#if defined (HAVE_CONFIG_H)
|
||||
# include <config.h>
|
||||
#endif
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <fcntl.h>
|
||||
#if defined (HAVE_SYS_FILE_H)
|
||||
# include <sys/file.h>
|
||||
#endif /* HAVE_SYS_FILE_H */
|
||||
|
||||
#if defined (HAVE_UNISTD_H)
|
||||
# include <unistd.h>
|
||||
#endif /* HAVE_UNISTD_H */
|
||||
|
||||
#include "bashansi.h"
|
||||
|
||||
#if defined (HAVE_SELECT)
|
||||
# if !defined (HAVE_SYS_SELECT_H) || !defined (M_UNIX)
|
||||
# include <sys/time.h>
|
||||
# endif
|
||||
#endif /* HAVE_SELECT */
|
||||
#if defined (HAVE_SYS_SELECT_H)
|
||||
# include <sys/select.h>
|
||||
#endif
|
||||
|
||||
#if defined (FIONREAD_IN_SYS_IOCTL)
|
||||
# include <sys/ioctl.h>
|
||||
#endif
|
||||
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
|
||||
#if !defined (errno)
|
||||
extern int errno;
|
||||
#endif /* !errno */
|
||||
|
||||
#if !defined (O_NDELAY) && defined (O_NONBLOCK)
|
||||
# define O_NDELAY O_NONBLOCK /* Posix style */
|
||||
#endif
|
||||
|
||||
/* Return >= 1 if select/FIONREAD indicates data available for reading on
|
||||
file descriptor FD; 0 if no data available. Return -1 on error. */
|
||||
int
|
||||
input_avail (fd)
|
||||
int fd;
|
||||
{
|
||||
int result, chars_avail;
|
||||
#if defined(HAVE_SELECT)
|
||||
fd_set readfds, exceptfds;
|
||||
struct timeval timeout;
|
||||
#endif
|
||||
|
||||
if (fd < 0)
|
||||
return -1;
|
||||
|
||||
chars_avail = 0;
|
||||
|
||||
#if defined (HAVE_SELECT)
|
||||
FD_ZERO (&readfds);
|
||||
FD_ZERO (&exceptfds);
|
||||
FD_SET (fd, &readfds);
|
||||
FD_SET (fd, &exceptfds);
|
||||
timeout.tv_sec = 0;
|
||||
timeout.tv_usec = 0;
|
||||
result = select (fd + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout);
|
||||
return ((result <= 0) ? 0 : 1);
|
||||
|
||||
#endif
|
||||
|
||||
result = -1;
|
||||
#if defined (FIONREAD)
|
||||
errno = 0;
|
||||
result = ioctl (fd, FIONREAD, &chars_avail);
|
||||
if (result == -1 && errno == EIO)
|
||||
return -1;
|
||||
return (chars_avail);
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user