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1 /* m_getdefs.c - read the user's MH environment */
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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/mh.h"
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7 #include <stdio.h>
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8 #include <errno.h>
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9 #ifdef UNISTD
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10 #include <unistd.h>
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11 #endif
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12 #include <sys/types.h>
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13 #include <sys/stat.h>
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14 #include <pwd.h>
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15
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16
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17 extern int errno;
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18
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19 #ifndef __STDC__
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20 #ifdef SYS5
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21 struct passwd *getpwuid ();
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22 #endif
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23 #endif /* !__STDC__ */
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24
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25
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26 #ifndef OVERHEAD
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27 #define FOpen(f,m,e,c) fopen (f, m)
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28 #define FClose(f) fclose (f)
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29 #else /* OVERHEAD */
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30 static FILE *FOpen ();
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31 static int FClose ();
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32
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33 off_t lseek ();
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34 #endif /* OVERHEAD */
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35
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36
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37 void m_getdefs() {
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38 int pid;
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39 register char *cp,
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40 *pp;
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41 #if defined (notdef) || defined (COMPAT)
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42 register char *ctx;
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43 #endif /* notdef or COMPAT */
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44 char buf[BUFSIZ];
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45 struct stat st;
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46 register struct passwd *pw;
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47 register FILE *ib;
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48
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49 if (defpath)
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50 return;
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51 if (mypath == NULL) {
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52 if (mypath = getenv ("HOME"))
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53 mypath = getcpy (mypath);
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54 else
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55 if ((pw = getpwuid (getuid ())) == NULL
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56 || pw -> pw_dir == NULL
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57 || *pw -> pw_dir == 0)
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58 adios (NULLCP, "no HOME envariable");
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59 else
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60 mypath = getcpy (pw -> pw_dir);
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61 if (strlen(mypath) >= BUFSIZ / 4)
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62 adios (NULLCP, "HOME envariable too long");
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63 if ((cp = mypath + strlen (mypath) - 1) > mypath && *cp == '/')
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64 *cp = 0;
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65 }
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66
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67 if ((cp = getenv ("MH")) && *cp) {
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68 if (strlen(cp) >= BUFSIZ / 4)
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69 adios (NULLCP, "MH envariable too long");
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70 defpath = path (cp, TFILE);
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71 if ((ib = FOpen (defpath, "r", "MHFD", 0)) == NULL)
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72 adios (defpath, "unable to read");
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73 if (*cp != '/')
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74 (void) m_putenv ("MH", defpath);
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75 }
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76 else {
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77 defpath = concat (mypath, "/", mh_profile, NULLCP);
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78
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79 if ((ib = FOpen (defpath, "r", "MHFD", 0)) == NULL)
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80 switch (pid = vfork ()) {
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81 case NOTOK:
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82 adios ("fork", "unable to");
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83
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84 case OK:
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85 (void) setgid (getgid ());
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86 (void) setuid (getuid ());
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87
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88 execlp (installproc, "install-mh", "-auto", NULLCP);
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89 fprintf (stderr, "unable to exec ");
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90 perror (installproc);
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91 _exit (-1);
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92
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93 default:
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94 if (pidwait (pid, OK)
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95 || (ib = fopen (defpath, "r")) == NULL)
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96 adios (NULLCP, "[install-mh aborted]");
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97 }
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98 }
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99
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100 #if defined (notdef) || defined (COMPAT)
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101 ctx = context;
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102 #endif /* notdef or COMPAT */
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103 m_readefs (&m_defs, ib, mh_profile, 0);
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104 (void) FClose (ib);
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105
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106 if ((pp = m_find ("path")) != NULL && *pp) {
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107 if (strlen(pp) >= BUFSIZ / 4)
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108 adios (NULLCP, "Path profile component too long");
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109 if (*pp != '/')
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110 (void) sprintf (buf, "%s/%s", mypath, pp);
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111 else
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112 (void) strcpy (buf, pp);
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113 if (stat(buf, &st) == NOTOK) {
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114 if (errno != ENOENT)
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115 adios (buf, "error opening");
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116 cp = concat ("Your MH-directory \"", buf,
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117 "\" doesn't exist; Create it? ", NULLCP);
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118 if (!getanswer(cp))
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119 adios (NULLCP, "unable to access MH-directory \"%s\"", buf);
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120 free (cp);
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121 if (!makedir (buf))
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122 adios (NULLCP, "unable to create", buf);
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123 }
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124 }
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125
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126 #ifdef COMPAT
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127 if (strcmp (ctx, "/dev/null") == 0)
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128 return; /* called by install-mh */
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129
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130 if (access (ctxpath = getcpy (m_maildir (ctx)), 0) == NOTOK)
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131 switch (pid = fork ()) {
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132 case NOTOK:
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133 adios ("fork", "unable to");
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134
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135 case OK:
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136 (void) setgid (getgid ());
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137 (void) setuid (getuid ());
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138 fprintf (stderr, "install-mh -compat\n");
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139
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140 execlp (installproc, "install-mh", "-compat", NULLCP);
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141 fprintf (stderr, "unable to exec ");
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142 perror (installproc);
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143 _exit (-1);
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144
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145 default:
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146 if (pidwait (pid, OK) || access (ctxpath, 0) == NOTOK)
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147 adios (NULLCP, "[install-mh aborted]");
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148
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149 if ((ib = fopen (defpath, "r")) == NULL)
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150 adios (defpath, "unable to read");
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151 m_readefs (&m_defs, ib, mh_profile, 0);
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152 (void) FClose (ib);
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153 }
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154 free (ctxpath);
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155 #endif /* COMPAT */
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156
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157 if ((cp = getenv ("MHCONTEXT")) == NULL || *cp == 0)
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158 cp = context;
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159 if (strlen(cp) >= BUFSIZ / 4)
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160 adios (NULLCP, "MHCONTEXT envariable too long");
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161 if ((ib = FOpen (ctxpath = getcpy (m_maildir (cp)), "r", "MHCONTEXTFD", 1))
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162 == NULL) {
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163 #ifdef notdef /* XXX */
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164 if (cp != ctx)
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165 adios (ctxpath, "unable to read");
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166 #endif /* notdef */
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167 }
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168 else {
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169 m_readefs ((struct node **) 0, ib, cp, 1);
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170 (void) FClose (ib);
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171 }
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172 }
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173
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174 /* */
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175
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176 #ifdef OVERHEAD
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177 int fd_def = NOTOK;
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178 int fd_ctx = NOTOK;
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179
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180
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181 static FILE *FOpen (filename, mode, envariable, ctx)
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182 register char *filename,
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183 *mode,
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184 *envariable;
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185 register int ctx;
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186 {
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187 register int fd;
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188 register char *cp;
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189 char buffer[10];
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190 struct stat st1;
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191 register FILE * fp;
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192
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193 if ((cp = getenv (envariable)) == NULL || *cp == 0)
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194 goto not_open;
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195
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196 if ((fd = atoi (cp)) <= fileno (stderr)) {
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197 advise (NULLCP, "bad value for $%s: %s", envariable, cp);
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198 (void) unputenv (envariable);
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199 return fopen (filename, mode);
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200 }
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201 if (ctx)
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202 fd_ctx = fd;
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203 else
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204 fd_def = fd;
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205
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206 if (fstat (fd, &st1) == NOTOK) {
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207 not_open: ;
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208 if ((fp = fopen (filename, mode))
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209 && !strcmp (mode, "r")
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210 && fileno (fp) > fileno (stderr)) {
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211 (void) sprintf (buffer, "%d", fileno (fp));
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212 if (!m_putenv (envariable, buffer))
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213 if (ctx)
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214 fd_ctx = fileno (fp);
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215 else
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216 fd_def = fileno (fp);
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217 }
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218
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219 if ((cp = getenv ("MHFDEBUG")) && *cp)
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220 fprintf (stderr, "FOpen of %s sets %d\n", filename, fileno (fp));
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221 return fp;
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222 }
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223
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224 (void) lseek (fd, (off_t)0, 0);
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225 return fdopen (fd, mode);
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226 }
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227
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228
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229 static int FClose (f)
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230 register FILE *f;
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231 {
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232 register int d1,
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233 d2,
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234 i;
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235 register char *cp;
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236
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237 if (f == NULL)
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238 return OK;
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239
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240 if ((d1 = fileno (f)) != fd_def && d1 != fd_ctx)
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241 return fclose (f);
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242
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243 d2 = dup (d1);
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244 i = fclose (f);
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245
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246 if (d2 != NOTOK) {
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247 (void) dup2 (d2, d1);
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248 (void) close (d2);
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249 }
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250 else
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251 if (d1 == fd_def)
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252 fd_def = NOTOK;
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253 else
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254 fd_ctx = NOTOK;
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255
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256 if ((cp = getenv ("MHFDEBUG")) && *cp)
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257 fprintf (stderr, "FClose emulating close of %d (%d)\n", d1, d2);
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258 return i;
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259 }
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260 #endif /* OVERHEAD */
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