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annotate mpffs/cat.c @ 37:8256eec598dd

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mpffs-cat: more sensible handling of -v
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 30 Jun 2013 17:56:27 +0000
parents ee4c761187cf
children 7ceab8bfacb3
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1 /*
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2 * This module contains the main function and other code specific to mpffs-cat
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3 */
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4
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5 #include <sys/types.h>
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6 #include <ctype.h>
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7 #include <stdio.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdlib.h>
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11 #include <unistd.h>
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12 #include "types.h"
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13 #include "struct.h"
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14
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15 extern char *imgfile;
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16 extern int verbose;
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17
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18 int cat_v;
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19
35
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20 cat_chunk(chi)
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21 struct chunkinfo *chi;
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22 {
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23 u8 *dp;
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24 size_t len;
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25 int c;
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26
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27 dp = chi->start;
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28 len = chi->len;
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29 while (len) {
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30 c = *dp++;
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31 if (!cat_v || c >= ' ' && c <= '~' || c == '\n')
35
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32 putchar(c);
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33 else {
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34 if (c & 0x80) {
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35 putchar('M');
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36 putchar('-');
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37 c &= 0x7F;
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38 }
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39 putchar('^');
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40 if (c == 0x7F)
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41 putchar('?');
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42 else
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43 putchar(c + '@');
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44 }
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45 len--;
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46 }
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47 }
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48
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49 cat_file(headidx)
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50 {
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51 int ent;
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52 struct objinfo obj;
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53 struct chunkinfo chi;
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54
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55 obj.entryno = headidx;
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56 get_index_entry(&obj);
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57 if (obj.type != 0xF1) {
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58 fprintf(stderr,
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59 "mpffs-cat: the requested FFS object is not a regular file\n");
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60 exit(1);
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61 }
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62 validate_chunk(&obj);
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63 size_head_chunk(&obj, &chi);
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64 cat_chunk(&chi);
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65 for (ent = obj.descend; ent != 0xFFFF; ent = obj.descend) {
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66 obj.entryno = ent;
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67 get_index_entry(&obj);
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68 if (obj.type != 0xF4) {
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69 fprintf(stderr,
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70 "file continuation object at index %x: type %02X != expected F4\n",
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71 ent, obj.type);
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72 exit(1);
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73 }
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74 validate_chunk(&obj);
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75 size_extra_chunk(&obj, &chi);
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76 cat_chunk(&chi);
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77 }
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78 if (cat_v)
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79 putchar('\n');
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80 }
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81
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82 usage()
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83 {
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84 fprintf(stderr, "usage: mpffs-cat [options] ffs-image pathname\n");
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85 exit(1);
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86 }
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87
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88 main(argc, argv)
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89 char **argv;
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90 {
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91 extern int optind;
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92 int idx;
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93
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94 parse_cmdline_options(argc, argv);
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95 if (argc - optind != 2)
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96 usage();
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97 if (verbose) {
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98 cat_v = 1;
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99 verbose--;
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100 }
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101 imgfile = argv[optind];
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102 preliminaries();
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103 idx = find_pathname(argv[optind+1]);
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104 cat_file(idx);
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105 exit(0);
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106 }