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51 lines
1.5 KiB
51 lines
1.5 KiB
7 months ago
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/*
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* Copyright (c) International Business Machines Corp., 2001
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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
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* the GNU General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*****************************************************************************
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* readline.c
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******************************************************************************/
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#include <unistd.h>
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/* Read line from a descriptor, byte at a time, return number of
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characters up to the null */
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int readline(int fd, char *ptr, int maxlen)
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{
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int n, rc;
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char c;
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/*
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printf("readline: fd = %d\n", fd);
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*/
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for (n = 1; n < maxlen; n++) {
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if ((rc = read(fd, &c, 1)) == 1) {
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*ptr++ = c;
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if (c == '\n')
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break;
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} else if (rc == 0) {
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if (n == 1)
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return 0; /* EOF no data read */
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else
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break; /* EOF, some data read */
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} else
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return (-1); /* error */
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}
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*ptr = 0;
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return (n);
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}
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