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Annotation of prex-old/usr/bin/dmesg/dmesg.c, Revision 1.1

1.1     ! nbrk        1: /*-
        !             2:  * Copyright (c) 2007, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <prex/prex.h>
        !            31: #include <sys/ioctl.h>
        !            32:
        !            33: #include <unistd.h>
        !            34: #include <stdio.h>
        !            35: #include <stdlib.h>
        !            36:
        !            37: #ifdef CMDBOX
        !            38: #define main(argc, argv)       dmesg_main(argc, argv)
        !            39: #endif
        !            40:
        !            41: static int print_msg(char *buf, int size);
        !            42:
        !            43: int
        !            44: main(int argc, char *argv[])
        !            45: {
        !            46:        int size;
        !            47:        char *buf;
        !            48:
        !            49:        if (sys_debug(DCMD_LOGSIZE, &size) != 0)
        !            50:                exit(1);
        !            51:
        !            52:        if ((buf = malloc(size)) == NULL)
        !            53:                exit(1);
        !            54:
        !            55:        if (sys_debug(DCMD_GETLOG, buf) != 0) {
        !            56:                free(buf);
        !            57:                exit(1);
        !            58:        }
        !            59:        print_msg(buf, size);
        !            60:        free(buf);
        !            61:        return 0;
        !            62: }
        !            63:
        !            64: static int
        !            65: print_msg(char *buf, int size)
        !            66: {
        !            67:        struct winsize ws;
        !            68:        int i, cnt, ignore;
        !            69:        int row, maxrow;
        !            70:
        !            71:        /* Get screen size */
        !            72:        maxrow = 79;
        !            73:        if (ioctl(STDOUT_FILENO, TIOCGWINSZ, (u_long)&ws) == 0)
        !            74:                maxrow = (int)ws.ws_row - 1;
        !            75:
        !            76:        /* Find message start point */
        !            77:        for (i = 0; i < size; i++) {
        !            78:                if (buf[i] == -1)
        !            79:                        break;
        !            80:        }
        !            81:        if (i == size)
        !            82:                return 1;
        !            83:
        !            84:        row = 0;
        !            85:        ignore = 1;
        !            86:        for (cnt = 0; cnt < size; cnt++) {
        !            87:                if (buf[i] == '\n') {
        !            88:                        row++;
        !            89:                        ignore = 0;
        !            90:                }
        !            91:                if (!ignore)            /* skip first line */
        !            92:                        putc(buf[i], stdout);
        !            93:                if (++i >= size)
        !            94:                        i = 0;
        !            95:                if (row >= maxrow) {
        !            96:                        printf("--More-- ");
        !            97:                        getc(stdin);
        !            98:                        putchar('\n');
        !            99:                        row = 0;
        !           100:                }
        !           101:        }
        !           102:        return 0;
        !           103: }