40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* This is part of GDB, the GNU debugger.
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Copyright 2011-2016 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define _GNU_SOURCE 1
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#include <dlfcn.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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/* Wrap 'read', forcing it to return only one byte at a time, if
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reading from the terminal. */
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ssize_t
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read (int fd, void *buf, size_t count)
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{
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static ssize_t (*read2) (int fd, void *buf, size_t count) = NULL;
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if (read2 == NULL)
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{
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unsetenv ("LD_PRELOAD");
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read2 = dlsym (RTLD_NEXT, "read");
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}
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if (count > 1 && isatty (fd) >= 1)
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count = 1;
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return read2 (fd, buf, count);
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}
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