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                 /*
  53                  * Basically every data file can be guessed / verified as gpimage,
  54                  * so skip autodetection of data file as gpimage as it does not work.
  55                  */
  56                 if ((*curr)->check_image_type && (*curr)->check_image_type(IH_TYPE_GPIMAGE) == 0)
  57                         continue;
  58                 if ((*curr)->verify_header) {
  59                         retval = (*curr)->verify_header((unsigned char *)ptr,
  60                                                      sbuf->st_size, params);
  61
  62                         if (retval == 0) {
  63                                 /*
  64                                  * Print the image information if verify is
  65                                  * successful
  66                                  */
  67                                 if ((*curr)->print_header) {
  68                                         if (!params->quiet)
  69                                                 (*curr)->print_header(ptr);
  70                                 } else {
  71                                         fprintf(stderr,
  72                                                 "%s: print_header undefined for %s\n",
  73                                                 params->cmdname, (*curr)->name);
  74                                 }
  75                                 break;
  76                         }
  77                 }
  78         }
  79
  80         if (retval != 0) {
  81                 fprintf(stderr, "%s: cannot detect image type\n",
  82                         params->cmdname);
  83         }
  84
  85         return retval;
  86 }
  87
  88 static int imagetool_verify_print_header_by_type(
  89         void *ptr,
  90         struct stat *sbuf,
  91         struct image_type_params *tparams,
  92         struct image_tool_params *params)
  93 {
  94         int retval = -1;
  95
  96         if (tparams->verify_header) {
  97                 retval = tparams->verify_header((unsigned char *)ptr,
  98                                                 sbuf->st_size, params);
  99
 100                 if (retval == 0) {
 101                         /*
 102                          * Print the image information if verify is successful
 103                          */
 104                         if (tparams->print_header) {
 105                                 if (!params->quiet)
 106                                         tparams->print_header(ptr);
 107                         } else {
 108                                 fprintf(stderr,
 109                                         "%s: print_header undefined for %s\n",
 110                                         params->cmdname, tparams->name);
 111                         }
 112                 } else {
 113                         fprintf(stderr,
 114                                 "%s: verify_header failed for %s with exit code %d\n",
 115                                 params->cmdname, tparams->name, retval);
 116                 }
 117
 118         } else {
 119                 fprintf(stderr, "%s: verify_header undefined for %s\n",
 120                         params->cmdname, tparams->name);
 121         }
 122
 123         return retval;
 124 }
 125
 126 int imagetool_save_subimage(
 127         const char *file_name,
 128         ulong file_data,
 129         ulong file_len)
 130 {
 131         int dfd;
 132
 133         dfd = open(file_name, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
 134                    S_IRUSR | S_IWUSR);
 135         if (dfd < 0) {
 136                 fprintf(stderr, "Can't open \"%s\": %s\n",
 137                         file_name, strerror(errno));
 138                 return -1;
 139         }
 140
 141         if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) {
 142                 fprintf(stderr, "Write error on \"%s\": %s\n",
 143                         file_name, strerror(errno));
 144                 close(dfd);
 145                 return -1;
 146         }
 147
 148         close(dfd);
 149
 150         return 0;
 151 }
 152
 153 int imagetool_get_filesize(struct image_tool_params *params, const char *fname)
 154 {
 155         struct stat sbuf;
 156         int fd;
 157
 158         fd = open(fname, O_RDONLY | O_BINARY);
 159         if (fd < 0) {
 160                 fprintf(stderr, "%s: Can't open %s: %s\n",
 161                         params->cmdname, fname, strerror(errno));
 162                 return -1;
 163         }
 164
 165         if (fstat(fd, &sbuf) < 0) {
 166                 fprintf(stderr, "%s: Can't stat %s: %s\n",
 167                         params->cmdname, fname, strerror(errno));
 168                 close(fd);
 169                 return -1;
 170         }
 171         close(fd);
 172
 173         return sbuf.st_size;
 174 }
 175
 176 time_t imagetool_get_source_date(
 177          const char *cmdname,
 178          time_t fallback)
 179 {
 180         char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
 181
 182         if (source_date_epoch == NULL)
 183                 return fallback;
 184
 185         time_t time = (time_t) strtol(source_date_epoch, NULL, 10);
 186
 187         if (gmtime(&time) == NULL) {
 188                 fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
 189                         cmdname);
 190                 time = 0;
 191         }
 192
 193         return time;
 194 }