FreeCalypso > hg > freecalypso-tools

annotate ffstools/tiffs-mkfs/input.c @ 921:74d284add54d

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fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents 12ae93940467
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
705
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
1 #include <sys/types.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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2 #include <sys/param.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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3 #include <sys/stat.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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4 #include <dirent.h>
12ae93940467 tiffs-mkfs program written, compiles
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5 #include <stdio.h>
12ae93940467 tiffs-mkfs program written, compiles
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6 #include <stdint.h>
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7 #include <stdlib.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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8 #include <string.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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9 #include <strings.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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10 #include <unistd.h>
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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11 #include "struct.h"
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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12 #include "globals.h"
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13
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14 void
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15 read_dir_level(dto, srcpath, depth)
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16 struct tree_object *dto;
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17 char *srcpath;
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18 {
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19 DIR *rdd;
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Mychaela Falconia <falcon@freecalypso.org>
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20 struct dirent *dirent;
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Mychaela Falconia <falcon@freecalypso.org>
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21 char hostpath_child[MAXPATHLEN];
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Mychaela Falconia <falcon@freecalypso.org>
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22 struct stat hst;
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23 struct tree_object *cto;
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Mychaela Falconia <falcon@freecalypso.org>
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24 unsigned nchildren;
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25
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26 dto->is_dir = 1;
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27 rdd = opendir(srcpath);
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28 if (!rdd) {
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Mychaela Falconia <falcon@freecalypso.org>
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29 perror(srcpath);
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30 exit(1);
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31 }
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32 nchildren = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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33 while (dirent = readdir(rdd)) {
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34 if (dirent->d_name[0] == '.')
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Mychaela Falconia <falcon@freecalypso.org>
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35 continue;
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Mychaela Falconia <falcon@freecalypso.org>
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36 if (strlen(dirent->d_name) > MAX_FN_COMPONENT) {
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37 fprintf(stderr,
12ae93940467 tiffs-mkfs program written, compiles
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38 "error: \"%s\" in %s exceeds the FFS component name limit\n",
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39 dirent->d_name, srcpath);
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40 exit(1);
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41 }
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Mychaela Falconia <falcon@freecalypso.org>
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42 if (nchildren >= MAX_DIR_ENTRIES) {
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Mychaela Falconia <falcon@freecalypso.org>
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43 fprintf(stderr, "error: %s has too many children\n",
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44 srcpath);
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45 exit(1);
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46 }
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Mychaela Falconia <falcon@freecalypso.org>
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47 cto = malloc(sizeof(struct tree_object));
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Mychaela Falconia <falcon@freecalypso.org>
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48 if (!cto) {
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Mychaela Falconia <falcon@freecalypso.org>
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49 perror("malloc of struct tree_object");
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50 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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51 }
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Mychaela Falconia <falcon@freecalypso.org>
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52 strcpy(cto->name, dirent->d_name);
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Mychaela Falconia <falcon@freecalypso.org>
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53 dto->u.d.children[nchildren++] = cto;
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Mychaela Falconia <falcon@freecalypso.org>
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54 if (strlen(srcpath) + strlen(dirent->d_name) + 2 >
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55 sizeof hostpath_child) {
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56 fprintf(stderr,
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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57 "error: host side pathname buffer overflow\n");
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58 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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59 }
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Mychaela Falconia <falcon@freecalypso.org>
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60 sprintf(hostpath_child, "%s/%s", srcpath, dirent->d_name);
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61 if (lstat(hostpath_child, &hst) < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
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62 perror(hostpath_child);
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63 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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64 }
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65 switch (hst.st_mode & S_IFMT) {
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66 case S_IFREG:
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67 cto->is_dir = 0;
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68 strcpy(cto->u.f.host_pathname, hostpath_child);
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69 break;
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70 case S_IFDIR:
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71 if (depth >= MAX_DIR_NEST-1) {
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72 fprintf(stderr,
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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73 "error: directory nesting too deep at %s\n",
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74 hostpath_child);
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75 exit(1);
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76 }
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77 read_dir_level(cto, hostpath_child, depth + 1);
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78 break;
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79 default:
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80 fprintf(stderr,
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81 "error: %s is neither a regular file nor a directory\n",
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82 hostpath_child);
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83 exit(1);
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84 }
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85 }
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86 closedir(rdd);
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87 dto->u.d.nchildren = nchildren;
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88 }
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89
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90 static int
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91 compare_func(p1, p2)
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92 struct tree_object **p1, **p2;
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93 {
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94 return strcmp((*p1)->name, (*p2)->name);
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95 }
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96
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97 void
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98 sort_dir_level(dto)
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99 struct tree_object *dto;
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100 {
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101 unsigned n;
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102 struct tree_object *cto;
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103
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104 if (dto->u.d.nchildren > 1)
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105 qsort(dto->u.d.children, dto->u.d.nchildren,
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106 sizeof(struct tree_object *), compare_func);
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107 for (n = 0; n < dto->u.d.nchildren; n++) {
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108 cto = dto->u.d.children[n];
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109 if (cto->is_dir)
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110 sort_dir_level(cto);
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111 }
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112 }