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annotate simtool/bfsearch.c @ 148:db43bc57ecf7

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fc-simtool bfsearch: better reporting of EF structure
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 25 Feb 2021 07:00:51 +0000
parents 8d55571c8118
children 26d7a8815515
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c2889812788e fc-simtool bfsearch implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This module implements a brute force search of file ID space at a given
c2889812788e fc-simtool bfsearch implemented
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3 * file system directory level.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <ctype.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include "simresp.h"
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11
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12 static
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13 parse_skip_ids(argv, array, total)
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14 char **argv;
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15 unsigned *array, total;
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16 {
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17 unsigned n;
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18
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19 for (n = 0; n < total; n++) {
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20 if (!isxdigit(argv[n][0]) || !isxdigit(argv[n][1]) ||
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21 !isxdigit(argv[n][2]) || !isxdigit(argv[n][3]) ||
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22 argv[n][4]) {
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23 fprintf(stderr, "error: argument is not 4-digit hex\n");
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24 return(-1);
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25 }
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26 array[n] = strtoul(argv[n], 0, 16);
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27 }
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28 return(0);
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29 }
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30
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31 static void
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32 report_ef_struct(outf)
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33 FILE *outf;
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34 {
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35 unsigned total_size, record_len;
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36
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37 fputs("EF, ", outf);
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38 total_size = (sim_resp_data[2] << 8) | sim_resp_data[3];
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39 switch (sim_resp_data[13]) {
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40 case 0x00:
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41 fprintf(outf, "transparent, length %u\n", total_size);
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42 return;
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43 case 0x01:
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44 fputs("linear fixed, ", outf);
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45 break;
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46 case 0x03:
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47 fputs("cyclic, ", outf);
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48 break;
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49 default:
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50 fprintf(outf, "struct 0x%02X\n", sim_resp_data[13]);
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51 return;
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52 }
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53 if (sim_resp_data_len < 15) {
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54 fprintf(outf, "response struct cut off\n");
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55 return;
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56 }
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57 record_len = sim_resp_data[14];
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58 fprintf(outf, "record length %u", record_len);
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59 if (record_len && total_size % record_len == 0)
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60 fprintf(outf, ", %u records", total_size / record_len);
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61 putc('\n', outf);
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62 }
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63
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64 cmd_bfsearch(argc, argv, outf)
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65 char **argv;
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66 FILE *outf;
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67 {
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68 unsigned skip_ids[8], num_skip_ids;
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69 unsigned bfs, n;
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70 int rc;
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71
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72 num_skip_ids = argc - 1;
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73 rc = parse_skip_ids(argv + 1, skip_ids, num_skip_ids);
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74 if (rc < 0)
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75 return(rc);
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76 rc = elem_select_op(skip_ids[0]);
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77 if (rc < 0)
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78 return(rc);
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79 if (!rc) {
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80 fprintf(stderr, "error: starting file ID 0x%04X not found\n",
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81 skip_ids[0]);
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82 return(-1);
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83 }
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84 for (bfs = 0; bfs <= 0xFFFF; bfs++) {
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85 for (n = 0; n < num_skip_ids; n++) {
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86 if (bfs == skip_ids[n])
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87 break;
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88 }
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89 if (n < num_skip_ids)
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90 continue;
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91 rc = elem_select_op(bfs);
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92 if (rc < 0)
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93 return(rc);
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94 if (!rc)
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95 continue;
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96 rc = get_response_op();
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97 if (rc < 0)
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98 return(rc);
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99 fprintf(outf, "%04X: ", bfs);
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100 if (sim_resp_data_len < 14)
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101 fprintf(outf, "too-short response struct\n");
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102 else {
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103 switch (sim_resp_data[6]) {
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104 case 0x01:
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105 fprintf(outf, "MF\n");
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106 break;
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107 case 0x02:
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108 fprintf(outf, "DF\n");
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109 break;
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110 case 0x04:
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111 report_ef_struct(outf);
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112 break;
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113 default:
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114 fprintf(outf, "unknown file type %02X\n",
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115 sim_resp_data[6]);
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116 }
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117 }
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118 rc = elem_select_op(skip_ids[0]);
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119 if (rc < 0)
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120 return(rc);
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121 if (!rc) {
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122 fprintf(stderr,
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123 "reselecting starting file ID 0x%04X not-found error\n",
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124 skip_ids[0]);
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125 return(-1);
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126 }
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127 }
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128 return(0);
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129 }