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/* misc.c
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Copyright (c) 2000-2004 Craig Condit, Stefan Hülswitt.
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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 are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT 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 <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include "cdrom.h"
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#include "debug.h"
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extern char *prg_name;
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/****************************************************************************/
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void error(char *text)
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{
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fprintf(stderr,"%s: %s: %s\n",prg_name,text,strerror(errno));
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exit(1);
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}
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/****************************************************************************/
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void serror(char *text)
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{
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fprintf(stderr,"%s: %s\n",prg_name,text);
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exit(1);
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}
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/****************************************************************************/
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long long FlexLen(char *optarg)
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{
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char *end;
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long long len;
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errno=0; len=strtoll(optarg,&end,10);
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if(errno==ERANGE || len<1) serror("Option -l: length out of range (must be >=1)\n");
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switch(*end) {
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case 'K': /* kilo-bytes*/
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case 'k':
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len*=1024; break;
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case 0: /* mega-bytes */
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case 'M':
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case 'm':
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len*=(1024*1024); break;
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case 'G':
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case 'g':
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len*=(1024*1024*1024LL); break;
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case 's':
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case 'S':
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len*=CD_FRAMESIZE; break;
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default:
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serror("Unknown extention for media size");
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}
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DEBUG("media size len=%lld blocks=%lld\n",len,len/CD_FRAMESIZE);
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return len;
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}
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/****************************************************************************/
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char *FlexSize(char *buff, long long val)
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{
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char *unit=" ";
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if(val > 1024*1024*1024*16LL) { val/=1024*1024*1024LL; unit="G"; }
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else if(val > 1024*1024*16LL) { val/=1024*1024LL; unit="M"; }
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else if(val > 1024*16LL) { val/=1024LL; unit="k"; }
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sprintf(buff,"%5lld %sB",val,unit);
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return buff;
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}
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/****************************************************************************/
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int full_read(int fd, void *buf, int count)
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{
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int total=0;
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while(count>0) {
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int bytes;
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bytes=read(fd,buf,count);
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if(bytes==0) break;
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else if(bytes<0) {
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if(errno!=EAGAIN) error("Read failed");
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usleep(200*1000);
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}
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else {
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count-=bytes; buf+=bytes; total+=bytes;
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}
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}
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return total;
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}
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/****************************************************************************/
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void diskchange(char *multicmd, char *cd_dev)
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{
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int pid, status=0;
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char buffer[12];
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if(multicmd) { /* we have an external script */
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DEBUG("external diskchange started '%s'\n",multicmd);
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if((pid=fork())<0) error("Fork failed (diskchange)");
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if(pid==0) { /* child */
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char *argv[3];
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dup2(2,0); dup2(2,1); /* duplicate stderr as stdin/stdout */
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argv[0] = multicmd;
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argv[1] = cd_dev;
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argv[2] = 0;
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execvp(multicmd, argv);
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error("Exec failed (diskchange)");
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}
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while(1) {
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if(waitpid(pid,&status,0)==-1) { if (errno!=EINTR) { status=-1; break; } }
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else break;
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}
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}
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else { /* use internal diskchange */
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DEBUG("internal diskchange started\n");
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fprintf(stderr,"\n\nPlease insert next disk and press RETURN\n\n\n");
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do {
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pid=read(2,buffer,sizeof(buffer));
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if(pid<0 && errno!=EAGAIN) error("Read failed (diskchange)");
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} while(pid<=0 || (pid==sizeof(buffer) && buffer[sizeof(buffer)-1]!='\n'));
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}
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if(status) serror("Diskchange command failed");
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DEBUG("diskchange completed\n");
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}
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/****************************************************************************/
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static unsigned long crc_table[256] = {
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0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
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0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
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0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
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0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
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0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
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0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
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0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
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0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
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0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
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0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
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0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
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0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
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0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
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0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
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0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
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0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
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0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
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0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
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0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
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0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
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0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
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0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
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0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
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0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
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0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
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0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
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0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
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0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
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0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
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0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
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0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
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0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
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0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
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0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
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0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
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0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
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0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
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0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
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0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
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0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
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0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
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0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
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0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
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};
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unsigned long crc32(char *data, int len)
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{
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unsigned long crc=0xffffffff;
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int i;
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for(i=0 ; i<len ; i++)
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crc=(crc<<8) ^ crc_table[((crc>>24)^*data++)&0xff];
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return crc;
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}
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