1f08c3bdfSopenharmony_ci/* 2f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 3f08c3bdfSopenharmony_ci * 4f08c3bdfSopenharmony_ci * This program is free software; you can redistribute it and/or modify 5f08c3bdfSopenharmony_ci * it under the terms of the GNU General Public License as published by 6f08c3bdfSopenharmony_ci * the Free Software Foundation; either version 2 of the License, or 7f08c3bdfSopenharmony_ci * (at your option) any later version. 8f08c3bdfSopenharmony_ci * 9f08c3bdfSopenharmony_ci * This program is distributed in the hope that it will be useful, 10f08c3bdfSopenharmony_ci * but WITHOUT ANY WARRANTY; without even the implied warranty of 11f08c3bdfSopenharmony_ci * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12f08c3bdfSopenharmony_ci * the GNU General Public License for more details. 13f08c3bdfSopenharmony_ci * 14f08c3bdfSopenharmony_ci * You should have received a copy of the GNU General Public License 15f08c3bdfSopenharmony_ci * along with this program; if not, write to the Free Software 16f08c3bdfSopenharmony_ci * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17f08c3bdfSopenharmony_ci */ 18f08c3bdfSopenharmony_ci 19f08c3bdfSopenharmony_ci/***************************************************************************** 20f08c3bdfSopenharmony_ci * readline.c 21f08c3bdfSopenharmony_ci ******************************************************************************/ 22f08c3bdfSopenharmony_ci 23f08c3bdfSopenharmony_ci#include <unistd.h> 24f08c3bdfSopenharmony_ci 25f08c3bdfSopenharmony_ci/* Read line from a descriptor, byte at a time, return number of 26f08c3bdfSopenharmony_ci characters up to the null */ 27f08c3bdfSopenharmony_ci 28f08c3bdfSopenharmony_ciint readline(int fd, char *ptr, int maxlen) 29f08c3bdfSopenharmony_ci{ 30f08c3bdfSopenharmony_ci int n, rc; 31f08c3bdfSopenharmony_ci char c; 32f08c3bdfSopenharmony_ci /* 33f08c3bdfSopenharmony_ci printf("readline: fd = %d\n", fd); 34f08c3bdfSopenharmony_ci */ 35f08c3bdfSopenharmony_ci for (n = 1; n < maxlen; n++) { 36f08c3bdfSopenharmony_ci if ((rc = read(fd, &c, 1)) == 1) { 37f08c3bdfSopenharmony_ci *ptr++ = c; 38f08c3bdfSopenharmony_ci if (c == '\n') 39f08c3bdfSopenharmony_ci break; 40f08c3bdfSopenharmony_ci } else if (rc == 0) { 41f08c3bdfSopenharmony_ci if (n == 1) 42f08c3bdfSopenharmony_ci return 0; /* EOF no data read */ 43f08c3bdfSopenharmony_ci else 44f08c3bdfSopenharmony_ci break; /* EOF, some data read */ 45f08c3bdfSopenharmony_ci } else 46f08c3bdfSopenharmony_ci return (-1); /* error */ 47f08c3bdfSopenharmony_ci } 48f08c3bdfSopenharmony_ci *ptr = 0; 49f08c3bdfSopenharmony_ci return (n); 50f08c3bdfSopenharmony_ci} 51