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annotate rogue4/xstr.c @ 140:856017d63519

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xrogue: don't segfault when backstabbing while empty-handed. The code for backstabbing checked the weapon's properties without making sure it was not NULL.
author John "Elwin" Edwards
date Tue, 05 May 2015 12:12:20 -0400
parents 9535a08ddc39
children
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12
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1 /*
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2 *
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3 * Rogue: Exploring the Dungeons of Doom
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4 * Copyright (C) 1980, 1981, 1982 Michael Toy, Ken Arnold and Glenn Wichman
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5 * All rights reserved.
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6 *
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7 * See the file LICENSE.TXT for full copyright and licensing information.
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8 */
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9
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10 static char *sccsid = "@(#)xstr.c 4.1 (Berkeley) 10/1/80";
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11 #include <stdio.h>
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12 #include <ctype.h>
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13 #include <sys/types.h>
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14 #include <signal.h>
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15
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16 /*
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17 * xstr - extract and hash strings in a C program
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18 *
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19 * Bill Joy UCB
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20 * November, 1978
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21 */
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22
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23 #define ignore(a) (a)
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24
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25 char *calloc();
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26 off_t tellpt;
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27 off_t hashit();
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28 char *mktemp();
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29 void onintr(int);
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30 char *savestr();
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31 char *strcat();
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32 char *strcpy();
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33 off_t yankstr();
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34
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35 off_t mesgpt;
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36 char *strings = "strings";
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37
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38 int cflg;
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39 int vflg;
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40 int readstd;
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41
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42 main(argc, argv)
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43 int argc;
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44 char *argv[];
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45 {
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46
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47 argc--, argv++;
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48 while (argc > 0 && argv[0][0] == '-') {
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49 register char *cp = &(*argv++)[1];
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50
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51 argc--;
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52 if (*cp == 0) {
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53 readstd++;
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54 continue;
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55 }
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56 do switch (*cp++) {
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57
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58 case 'c':
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59 cflg++;
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60 continue;
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61
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62 case 'v':
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63 vflg++;
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64 continue;
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65
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66 default:
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67 fprintf(stderr, "usage: xstr [ -v ] [ -c ] [ - ] [ name ... ]\n");
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68 } while (*cp);
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69 }
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70 if (signal(SIGINT, SIG_IGN) == SIG_DFL)
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71 signal(SIGINT, onintr);
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72 if (cflg || argc == 0 && !readstd)
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73 inithash();
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74 else
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75 strings = mktemp(savestr("/tmp/xstrXXXXXX"));
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76 while (readstd || argc > 0) {
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77 if (freopen("x.c", "w", stdout) == NULL)
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78 perror("x.c"), exit(1);
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79 if (!readstd && freopen(argv[0], "r", stdin) == NULL)
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80 perror(argv[0]), exit(2);
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81 process("x.c");
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82 if (readstd == 0)
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83 argc--, argv++;
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84 else
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85 readstd = 0;
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86 };
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87 flushsh();
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88 if (cflg == 0)
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89 xsdotc();
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90 if (strings[0] == '/')
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91 ignore(md_unlink(strings));
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92 exit(0);
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93 }
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94
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95 process(name)
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96 char *name;
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97 {
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98 char *cp;
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99 char linebuf[BUFSIZ];
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100 register int c;
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101 register int incomm = 0;
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102
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103 printf("extern char\txstr[];\n");
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104 for (;;) {
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105 if (fgets(linebuf, sizeof linebuf, stdin) == NULL) {
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106 if (ferror(stdin)) {
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107 perror(name);
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