annotate simtool/restorebin.c @ 17:b8d27c72747a

GSM7 encoding function factored out of pb-update-imm
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 Feb 2021 02:54:17 +0000
parents a6ca422323b9
children 54cebab70c19
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1 /*
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2 * This module implements the restore-file command; this command
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3 * reads binary files previously saved with the savebin command
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4 * and writes the backed-up bits back to the SIM.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <sys/file.h>
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9 #include <sys/stat.h>
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10 #include <ctype.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <unistd.h>
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14 #include "curfile.h"
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16 static
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17 restore_transparent(data)
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18 u_char *data;
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19 {
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20 unsigned off, cc;
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21 int rc;
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22
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23 for (off = 0; off < curfile_total_size; off += cc) {
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24 cc = curfile_total_size - off;
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25 if (cc > 255)
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26 cc = 255;
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27 rc = update_bin_op(off, data + off, cc);
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28 if (rc < 0)
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29 return(rc);
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30 }
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31 return(0);
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32 }
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34 static
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35 restore_records(data)
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36 u_char *data;
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37 {
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38 unsigned recno;
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39 u_char *dp;
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40 int rc;
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41
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42 dp = data;
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43 for (recno = 1; recno <= curfile_record_count; recno++) {
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44 rc = update_rec_op(recno, 0x04, dp, curfile_record_len);
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45 if (rc < 0)
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46 return(rc);
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47 dp += curfile_record_len;
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48 }
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49 return(0);
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50 }
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51
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52 cmd_restore_file(argc, argv)
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53 char **argv;
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54 {
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55 int file_id, rc, fd;
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56 struct stat st;
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57 u_char *databuf;
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58
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59 if (isxdigit(argv[1][0]) && isxdigit(argv[1][1]) &&
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60 isxdigit(argv[1][2]) && isxdigit(argv[1][3]) && !argv[1][4])
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61 file_id = strtoul(argv[1], 0, 16);
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62 else
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63 file_id = find_symbolic_file_name(argv[1]);
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64 if (file_id < 0) {
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65 fprintf(stderr,
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66 "error: file ID argument is not a hex value or a recognized symbolic name\n");
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67 return(-1);
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68 }
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69 rc = select_op(file_id);
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70 if (rc < 0)
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71 return(rc);
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72 rc = parse_ef_select_response();
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73 if (rc < 0)
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74 return(rc);
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75 if (!curfile_total_size) {
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76 printf("SIM indicates file of zero length, nothing to do\n");
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77 return(0);
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78 }
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79 fd = open(argv[2], O_RDONLY);
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80 if (fd < 0) {
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81 perror(argv[2]);
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82 return(-1);
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83 }
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84 fstat(fd, &st);
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85 if ((st.st_mode & S_IFMT) != S_IFREG) {
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86 fprintf(stderr, "error: %s is not a regular file\n", argv[2]);
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87 close(fd);
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88 return(-1);
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89 }
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90 if (st.st_size != curfile_total_size) {
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91 fprintf(stderr,
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92 "error: length of %s does not match SIM EF length of %u bytes\n",
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93 argv[2], curfile_total_size);
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94 close(fd);
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95 return(-1);
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96 }
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97 databuf = malloc(curfile_total_size);
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98 if (!databuf) {
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99 perror("malloc for file data");
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100 close(fd);
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101 return(-1);
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102 }
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103 read(fd, databuf, curfile_total_size);
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104 close(fd);
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105 switch (curfile_structure) {
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106 case 0x00:
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107 /* transparent */
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108 rc = restore_transparent(databuf);
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109 break;
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110 case 0x01:
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111 /* record-based */
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112 rc = restore_records(databuf);
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113 break;
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114 case 0x03:
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115 fprintf(stderr, "error: cyclic files are not supported\n");
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116 rc = -1;
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117 }
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118 free(databuf);
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119 return(rc);
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120 }