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 int imagetool_verify_print_header(
  30         void *ptr,
  31         struct stat *sbuf,
  32         struct image_type_params *tparams,
  33         struct image_tool_params *params)
  34 {
  35         int retval = -1;
  36         struct image_type_params **curr;
  37         INIT_SECTION(image_type);
  38
  39         struct image_type_params **start = __start_image_type;
  40         struct image_type_params **end = __stop_image_type;
  41
  42         for (curr = start; curr != end; curr++) {
  43                 if ((*curr)->verify_header) {
  44                         retval = (*curr)->verify_header((unsigned char *)ptr,
  45                                                      sbuf->st_size, params);
  46
  47                         if (retval == 0) {
  48                                 /*
  49                                  * Print the image information  if verify is
  50                                  * successful
  51                                  */
  52                                 if ((*curr)->print_header) {
  53                                         if (!params->quiet)
  54                                                 (*curr)->print_header(ptr);
  55                                 } else {
  56                                         fprintf(stderr,
  57                                                 "%s: print_header undefined for %s\n",
  58                                                 params->cmdname, (*curr)->name);
  59                                 }
  60                                 break;
  61                         }
  62                 }
  63         }
  64
  65         return retval;
  66 }
  67
  68 int imagetool_save_subimage(
  69         const char *file_name,
  70         ulong file_data,
  71         ulong file_len)
  72 {
  73         int dfd;
  74
  75         dfd = open(file_name, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
  76                    S_IRUSR | S_IWUSR);
  77         if (dfd < 0) {
  78                 fprintf(stderr, "Can't open \"%s\": %s\n",
  79                         file_name, strerror(errno));
  80                 return -1;
  81         }
  82
  83         if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) {
  84                 fprintf(stderr, "Write error on \"%s\": %s\n",
  85                         file_name, strerror(errno));
  86                 close(dfd);
  87                 return -1;
  88         }
  89
  90         close(dfd);
  91
  92         return 0;
  93 }
  94
  95 int imagetool_get_filesize(struct image_tool_params *params, const char *fname)
  96 {
  97         struct stat sbuf;
  98         int fd;
  99
 100         fd = open(fname, O_RDONLY | O_BINARY);
 101         if (fd < 0) {
 102                 fprintf(stderr, "%s: Can't open %s: %s\n",
 103                         params->cmdname, fname, strerror(errno));
 104                 return -1;
 105         }
 106
 107         if (fstat(fd, &sbuf) < 0) {
 108                 fprintf(stderr, "%s: Can't stat %s: %s\n",
 109                         params->cmdname, fname, strerror(errno));
 110                 close(fd);
 111                 return -1;
 112         }
 113         close(fd);
 114
 115         return sbuf.st_size;
 116 }
 117
 118 time_t imagetool_get_source_date(
 119          const char *cmdname,
 120          time_t fallback)
 121 {
 122         char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
 123
 124         if (source_date_epoch == NULL)
 125                 return fallback;
 126
 127         time_t time = (time_t) strtol(source_date_epoch, NULL, 10);
 128
 129         if (gmtime(&time) == NULL) {
 130                 fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
 131                         cmdname);
 132                 time = 0;
 133         }
 134
 135         return time;
 136 }