tools/imagetool.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2013
   4  *
   5  * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
   6  */
   7
   8 #include "imagetool.h"
   9
  10 #include <image.h>
  11
  12 struct image_type_params *imagetool_get_type(int type)
  13 {
  14         struct image_type_params **curr;
  15         INIT_SECTION(image_type);
  16
  17         struct image_type_params **start = __start_image_type;
  18         struct image_type_params **end = __stop_image_type;
  19
  20         for (curr = start; curr != end; curr++) {
  21                 if ((*curr)->check_image_type) {
  22                         if (!(*curr)->check_image_type(type))
  23                                 return *curr;
  24                 }
  25         }
  26         return NULL;
  27 }
  28
  29 static int imagetool_verify_print_header_by_type(
  30         void *ptr,
  31         struct stat *sbuf,
  32         struct image_type_params *tparams,
  33         struct image_tool_params *params);
  34
  35 int imagetool_verify_print_header(
  36         void *ptr,
  37         struct stat *sbuf,
  38         struct image_type_params *tparams,
  39         struct image_tool_params *params)
  40 {
  41         int retval = -1;
  42         struct image_type_params **curr;
  43         INIT_SECTION(image_type);
  44
  45         struct image_type_params **start = __start_image_type;
  46         struct image_type_params **end = __stop_image_type;
  47
  48         if (tparams)
  49                 return imagetool_verify_print_header_by_type(ptr, sbuf, tparams, params);
  50
  51         for (curr = start; curr != end; curr++) {
  52                 if ((*curr)->verify_header) {
  53                         retval = (*curr)->verify_header((unsigned char *)ptr,
  54                                                      sbuf->st_size, params);
  55
  56                         if (retval == 0) {
  57                                 /*
  58                                  * Print the image information if verify is
  59                                  * successful
  60                                  */
  61                                 if ((*curr)->print_header) {
  62                                         if (!params->quiet)
  63                                                 (*curr)->print_header(ptr);
  64                                 } else {
  65                                         fprintf(stderr,
  66                                                 "%s: print_header undefined for %s\n",
  67                                                 params->cmdname, (*curr)->name);
  68                                 }
  69                                 break;
  70                         }
  71                 }
  72         }
  73
  74         return retval;
  75 }
  76
  77 static int imagetool_verify_print_header_by_type(
  78         void *ptr,
  79         struct stat *sbuf,
  80         struct image_type_params *tparams,
  81         struct image_tool_params *params)
  82 {
  83         int retval = -1;
  84
  85         if (tparams->verify_header) {
  86                 retval = tparams->verify_header((unsigned char *)ptr,
  87                                                 sbuf->st_size, params);
  88
  89                 if (retval == 0) {
  90                         /*
  91                          * Print the image information if verify is successful
  92                          */
  93                         if (tparams->print_header) {
  94                                 if (!params->quiet)
  95                                         tparams->print_header(ptr);
  96                         } else {
  97                                 fprintf(stderr,
  98                                         "%s: print_header undefined for %s\n",
  99                                         params->cmdname, tparams->name);
 100                         }
 101                 } else {
 102                         fprintf(stderr,
 103                                 "%s: verify_header failed for %s with exit code %d\n",
 104                                 params->cmdname, tparams->name, retval);
 105                 }
 106
 107         } else {
 108                 fprintf(stderr, "%s: print_header undefined for %s\n",
 109                         params->cmdname, tparams->name);
 110         }
 111
 112         return retval;
 113 }
 114
 115 int imagetool_save_subimage(
 116         const char *file_name,
 117         ulong file_data,
 118         ulong file_len)
 119 {
 120         int dfd;
 121
 122         dfd = open(file_name, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
 123                    S_IRUSR | S_IWUSR);
 124         if (dfd < 0) {
 125                 fprintf(stderr, "Can't open \"%s\": %s\n",
 126                         file_name, strerror(errno));
 127                 return -1;
 128         }
 129
 130         if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) {
 131                 fprintf(stderr, "Write error on \"%s\": %s\n",
 132                         file_name, strerror(errno));
 133                 close(dfd);
 134                 return -1;
 135         }
 136
 137         close(dfd);
 138
 139         return 0;
 140 }
 141
 142 int imagetool_get_filesize(struct image_tool_params *params, const char *fname)
 143 {
 144         struct stat sbuf;
 145         int fd;
 146
 147         fd = open(fname, O_RDONLY | O_BINARY);
 148         if (fd < 0) {
 149                 fprintf(stderr, "%s: Can't open %s: %s\n",
 150                         params->cmdname, fname, strerror(errno));
 151                 return -1;
 152         }
 153
 154         if (fstat(fd, &sbuf) < 0) {
 155                 fprintf(stderr, "%s: Can't stat %s: %s\n",
 156                         params->cmdname, fname, strerror(errno));
 157                 close(fd);
 158                 return -1;
 159         }
 160         close(fd);
 161
 162         return sbuf.st_size;
 163 }
 164
 165 time_t imagetool_get_source_date(
 166          const char *cmdname,
 167          time_t fallback)
 168 {
 169         char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
 170
 171         if (source_date_epoch == NULL)
 172                 return fallback;
 173
 174         time_t time = (time_t) strtol(source_date_epoch, NULL, 10);
 175
 176         if (gmtime(&time) == NULL) {
 177                 fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
 178                         cmdname);
 179                 time = 0;
 180         }
 181
 182         return time;
 183 }