tools/imagetool.c

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