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77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
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* Copyright (C) 2018 bzt (bztsrc@github)
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "uart.h"
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/**
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* Helper function to convert ASCII octal number into binary
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* s string
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* n number of digits
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*/
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int oct2bin(char *s, int n)
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{
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int r=0;
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while(n-->0) {
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r<<=3;
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r+=*s++-'0';
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}
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return r;
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}
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/**
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* List the contents of a tar archive
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*/
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void initrd_list(char *buf)
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{
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char *types[]={"regular", "link ", "symlnk", "chrdev", "blkdev", "dircty", "fifo ", "??? "};
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uart_puts("Type Offset Size Access rights\tFilename\n");
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// iterate on archive's contents
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while(!__builtin_memcmp(buf+257,"ustar",5)){
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int fs=oct2bin(buf+0x7c,11);
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// print out meta information
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uart_puts(types[buf[0x9c]-'0']);
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uart_send(' ');
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uart_hex((unsigned int)((unsigned long)buf)+512);
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uart_send(' ');
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uart_hex(fs); // file size in hex
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uart_send(' ');
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uart_puts(buf+0x64); // access bits in octal
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uart_send(' ');
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uart_puts(buf+0x109); // owner
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uart_send('.');
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uart_puts(buf+0x129); // group
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uart_send('\t');
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uart_puts(buf); // filename
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if(buf[0x9c]=='2') {
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uart_puts(" -> "); // symlink target
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uart_puts(buf+0x9d);
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}
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uart_puts("\n");
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// jump to the next file
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buf+=(((fs+511)/512)+1)*512;
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}
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}
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