6458c49c96
The gHardy man pages specify the return type of ptsname_r to be char*, but the return value to be 0 on success, negative on error and the gHardy stdlib.h defines extern int ptsname_r(...). Busybox telnetd fails to run successfully without this change.
58 lines
2 KiB
C
58 lines
2 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <string.h>
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int ptsname_r( int fd, char* buf, size_t buflen)
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{
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unsigned int pty_num;
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char buff[64];
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int len;
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if (buf == NULL) {
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errno = EINVAL;
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return -1;
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}
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if ( ioctl( fd, TIOCGPTN, &pty_num ) != 0 ) {
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errno = ENOTTY;
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return -1;
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}
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len = snprintf( buff, sizeof(buff), "/dev/pts/%u", pty_num );
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if (len+1 > (int)buflen) {
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errno = ERANGE;
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return -1;
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}
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memcpy( buf, buff, len+1 );
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return 0;
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}
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