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1 /* popwrd.c - set password for a POP subscriber */
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2 #ifndef lint
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3 static char ident[] = "@(#)$Id$";
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4 #endif /* lint */
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5
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6 #include "../h/strings.h"
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7 #include "../zotnet/bboards.h"
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8 #include <errno.h>
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9 #include <pwd.h>
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10 #include <signal.h>
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11 #include <stdio.h>
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12 #include <sys/types.h>
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13 #include <sys/file.h>
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14 #ifdef SYS5
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15 #include <fcntl.h>
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16 #endif /* SYS5 */
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17
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18 #ifndef __STDC__
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19 #ifdef SYS5
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20 struct passwd *getpwnam();
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21 #endif
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22 #endif
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23
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24 static char temp[] = "ptmp";
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25 static char home[BUFSIZ];
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26
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27 extern int errno;
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28
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29 char *crypt (), *getpass (), *tail ();
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30 time_t time ();
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31
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32 #define compar(s,t) (strcmp (s, t) ? s : "")
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33
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34 /* */
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35
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36 /* ARGSUSED */
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37
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38 main (argc, argv)
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39 int argc;
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40 char **argv;
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41 {
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42 int i,
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43 fd,
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44 flags,
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45 insist;
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46 time_t salt;
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47 char c,
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48 *cp,
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49 buffer[BUFSIZ],
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50 saltc[2],
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51 **ap;
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52 struct bboard *bb,
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53 *bp;
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54 struct passwd *pw;
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55 FILE * fp;
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56
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57 if ((pw = getpwnam (POPUID)) == NULL) {
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58 fprintf (stderr, "no entry for ~%s.\n", POPUID);
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59 exit (1);
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60 }
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61 if (chdir (strcpy (home, pw -> pw_dir)) < 0) {
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62 fprintf (stderr, "no home directory for ~%s.\n", POPUID);
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63 exit (1);
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64 }
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65 if (!setpwinfo (pw, POPDB, 0)) {
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66 fprintf (stderr, "setbbinfo(%s, %s, 0) failed -- %s.\n",
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67 pw -> pw_name, POPDB, getbberr ());
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68 exit (1);
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69 }
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70
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71 if (argc != 2) {
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72 fprintf (stderr, "usage: %s pop-subscriber\n", *argv);
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73 exit (1);
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74 }
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75 if ((bb = getbbnam (argv[1])) == NULL
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76 && (bb = getbbaka (argv[1])) == NULL) {
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77 fprintf (stderr, "Permission denied.\n");
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78 exit (1);
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79 }
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80
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81 if (!ldrbb (bb) && getuid () && !ldrchk (bb))
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82 exit (1);
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83
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84 if ((bp = getbbcpy (bb)) == NULL) {
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85 fprintf (stderr, "getbbcpy loses.\n");
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86 exit (1);
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87 }
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88
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89 (void) endbbent ();
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90
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91 #ifdef lint
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92 flags = 0;
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93 #endif /* lint */
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94 for (insist = 0; insist < 2; insist++) {
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95 if (insist)
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96 printf ("Please use %s.\n",
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97 flags == 1 ? "at least one non-numeric character"
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98 : "a longer password");
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99
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100 if ((i = strlen (strcpy (buffer, getpass ("New password:")))) == 0) {
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101 fprintf (stderr, "Password unchanged.\n");
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102 exit (1);
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103 }
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104
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105 flags = 0;
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106 for (cp = buffer; c = *cp++;)
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107 if (c >= 'a' && c <= 'z')
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108 flags |= 2;
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109 else
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110 if (c >= 'A' && c <= 'Z')
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111 flags |= 4;
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112 else
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113 if (c >= '0' && c <= '9')
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114 flags |= 1;
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115 else
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116 flags |= 8;
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117
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118 if ((flags >= 7 && i >= 4)
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119 || ((flags == 2 || flags == 4) && i >= 6)
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120 || ((flags == 3 || flags == 5 || flags == 6) && i >= 5))
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121 break;
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122 }
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123
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124 if (strcmp (buffer, getpass ("Retype new password:"))) {
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125 fprintf (stderr, "Mismatch - password unchanged.\n");
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126 exit (1);
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127 }
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128
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129 (void) time (&salt);
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130 salt ^= 9 * getpid ();
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131 saltc[0] = salt & 077;
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132 saltc[1] = (salt >> 6) & 077;
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133 for (i = 0; i < 2; i++) {
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134 c = saltc[i] + '.';
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135 if (c > '9')
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136 c += 7;
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137 if (c > 'Z')
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138 c += 6;
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139 saltc[i] = c;
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140 }
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141 cp = crypt (buffer, saltc);
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142
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143 (void) signal (SIGHUP, SIG_IGN);
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144 (void) signal (SIGINT, SIG_IGN);
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145 (void) signal (SIGQUIT, SIG_IGN);
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146
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147 (void) umask (0);
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148 if ((fd = open (temp, O_WRONLY | O_CREAT | O_EXCL, 0644)) < 0) {
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149 switch (errno) {
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150 case EEXIST:
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151 fprintf (stderr, "POP file busy - try again later.\n");
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152 break;
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153
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154 default:
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155 perror (temp);
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156 break;
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157 }
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158 exit (1);
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159 }
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160
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161 #ifdef SIGTSTP
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162 (void) signal (SIGTSTP, SIG_IGN);
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163 #endif /* SIGTSTP */
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164 if ((fp = fdopen (fd, "w")) == NULL) {
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165 fprintf (stderr, "fdopen loses.\n");
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166 (void) unlink (temp);
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167 exit (1);
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168 }
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169
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170 (void) setbbent (SB_STAY | SB_FAST);
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171 while (bb = getbbent ()) {
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172 if (strcmp (bb -> bb_name, bp -> bb_name) == 0)
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173 bb -> bb_passwd = cp;
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174 fprintf (fp, "%s:", bb -> bb_name);
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175 if (ap = bb -> bb_aka)
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176 for (; *ap; ap++)
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177 fprintf (fp, "%s%s", ap != bb -> bb_aka ? "," : "", *ap);
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178 fprintf (fp, ":%s:%s:", tail (bb -> bb_file), bb -> bb_passwd);
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179 if ((ap = bb -> bb_leader) != NULL
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180 && (strcmp (*ap, POPUID) != 0 || ap[1] != NULL))
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181 for (; *ap; ap++)
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182 fprintf (fp, "%s%s", ap != bb -> bb_leader ? "," : "", *ap);
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183 fprintf (fp, ":%s:%s:%s:",
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184 compar (bb -> bb_addr, bb -> bb_name),
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185 compar (bb -> bb_request, POPUID),
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186 bb -> bb_relay);
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187 if (ap = bb -> bb_dist)
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188 for (; *ap; ap++)
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189 fprintf (fp, "%s%s", ap != bb -> bb_dist ? "," : "", *ap);
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190 fprintf (fp, ":%o\n", bb -> bb_flags);
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191 }
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192 (void) endbbent ();
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193
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194 if (rename (temp, POPDB) < 0) {
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195 perror ("rename");
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196 (void) unlink (temp);
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197 exit (1);
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198 }
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199 (void) fclose (fp);
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200
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201 exit (0);
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202 }
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203
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204 /* */
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205
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206 char *tail (s)
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207 char *s;
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208 {
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209 int i;
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210 char *cp;
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211
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212 if (strncmp (s, home, i = strlen (home)) == 0
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213 && *(cp = s + i) == '/'
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214 && *++cp)
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215 return cp;
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216
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217 return s;
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218 }
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