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annotate srogue/makevers.c @ 176:db1c9a21a7c3

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srogue: prevent overflowing the score file name. If SCOREFILE is not defined, roguehome() is called to find a directory for the score file. It copies up to PATH_MAX-20 bytes from an environment variable to a static buffer. Later these are strcpy()'d to scorefile, which is of size LINLEN. Unfortunately LINLEN is 80 and PATH_MAX is at least 256. On Linux, it happens to be 4096. I haven't yet managed to crash or exploit it, but there are surely no beneficial consequences, so roguehome() has been modified to check the length, and the string it returns is also checked in main().
author John "Elwin" Edwards
date Sun, 02 Aug 2015 12:14:47 -0400
parents 2128c7dc8a40
children
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36
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1 /*
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2 * Change the version number of rogue
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3 *
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4 * The version must be in the file in the format of:
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5 *
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6 * " * @(#)filename\tVERSION\t ..."
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7 *
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8 * Where VERSION is a 3 character string, i.e., "8.2"
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9 *
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10 * Super-Rogue
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11 * Copyright (C) 1984 Robert D. Kindelberger
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include <stdio.h>
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18 #include <time.h>
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19
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20 long clock;
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21 struct tm *tp;
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22 char who[100];
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23
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24 char *strrchr(), *strchr(), *fgets();
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25
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26 main(argc, argv)
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27 int argc;
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28 char **argv;
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29 {
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30 register int i;
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31 register char *ptr;
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32 char ts[30];
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33 FILE *fp;
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34
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35 strcpy(who, argv[0]);
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36 if (argc < 3) {
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37 fprintf(stderr,"Usage: %s VERSION c_files\n", who);
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38 exit(1);
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39 }
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40 if (strlen(argv[1]) != 3) {
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41 fprintf(stderr,"%s: VERSION must be length 3\n", who);
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42 exit(1);
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43 }
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44 time(&clock);
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45 tp = localtime(&clock);
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46 sprintf(ts,"%2d/%2d/%2d",tp->tm_mon + 1,tp->tm_mday,tp->tm_year);
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47 for (i = 2; i < argc; i++) {
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48 ptr = strrchr(argv[i], '.');
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49 /*
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50 * make sure that files end in ".c" or ".h"
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51 */
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52 if (ptr != NULL) {
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53 ++ptr;
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54 if (*ptr == 'c' || *ptr == 'h')
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55 updvers(argv[1], argv[i]);
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56 }
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57 }
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58 /*
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59 * now install new "version.c" file
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60 */
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61 fp = fopen("vers.c", "w");
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62 if (fp == NULL) {
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63 fprintf(stderr,"%s: cant write version.c file\n",who);
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64 exit(1);
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65 }
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66 fprintf(fp, "/*\n * version number.\n */\n");
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67 fprintf(fp, "char version[] = ");
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68 fprintf(fp, "%c@(#)vers.c\t%3s\t(rdk)\t%s%c;\n", '"',
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69 argv[1], ts, '"');
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70 fprintf(fp, "char *release = \"%s (%s)\";\n", argv[1],ts);
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71 fclose(fp);
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72 exit(0);
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73 }
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74
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75 #define LINESIZ 132
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76
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77 updvers(vers, fname)
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78 char *fname;
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79 char *vers;
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80 {
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81 register FILE *fp;
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82 register char *ptr, *c;
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83 char line[LINESIZ];
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84
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85 if ((fp = fopen(fname, "r+")) == NULL) {
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86 fprintf(stderr,"%s: Not able to update %s\n", who, fname);
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87 return;
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88 }
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89 while ((c = fgets(line, LINESIZ, fp)) != NULL) {
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90 if (line[1] == '*' && line[3] == '@' && line[5] == '#') {
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91 ptr = strchr(line, '\t');
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92 if (ptr != NULL) {
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93 fseek(fp, -strlen(line), 1);
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94 sprintf(ptr, "\t%3s\t(rdk)\t%2d/%2d/%2d\n", vers,
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95 tp->tm_mon + 1, tp->tm_mday, tp->tm_year);
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96 fprintf(fp, "%s", line);
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97 break;
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98 }
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99 }
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100 }
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101 fclose(fp);
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102 }