diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/sbr/m_getdefs.c

   1 /* m_getdefs.c - read the user's MH environment */
   2 #ifndef lint
   3 static char ident[] = "@(#)$Id: m_getdefs.c,v 1.8 1993/09/03 17:38:51 jromine Exp $";
   4 #endif  /* lint */
   5
   6 #include "../h/mh.h"
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <pwd.h>
  12
  13
  14 extern int errno;
  15
  16 #ifndef __STDC__
  17 #ifdef  SYS5
  18 struct  passwd  *getpwuid ();
  19 #endif
  20 #endif /* !__STDC__ */
  21
  22
  23 #ifndef OVERHEAD
  24 #define FOpen(f,m,e,c)  fopen (f, m)
  25 #define FClose(f)       fclose (f)
  26 #else   /* OVERHEAD */
  27 static FILE    *FOpen ();
  28 static int      FClose ();
  29
  30 off_t   lseek ();
  31 #endif  /* OVERHEAD */
  32
  33
  34 void m_getdefs() {
  35     int     pid;
  36     register char  *cp,
  37                    *pp;
  38 #if     defined (notdef) || defined (COMPAT)
  39     register char  *ctx;
  40 #endif  /* notdef or COMPAT */
  41     char    buf[BUFSIZ];
  42     struct stat st;
  43     register struct passwd *pw;
  44     register    FILE *ib;
  45
  46     if (defpath)
  47         return;
  48     if (mypath == NULL) {
  49         if (mypath = getenv ("HOME"))
  50             mypath = getcpy (mypath);
  51         else
  52             if ((pw = getpwuid (getuid ())) == NULL
  53                     || pw -> pw_dir == NULL
  54                     || *pw -> pw_dir == 0)
  55                 adios (NULLCP, "no HOME envariable");
  56             else
  57                 mypath = getcpy (pw -> pw_dir);
  58         if ((cp = mypath + strlen (mypath) - 1) > mypath && *cp == '/')
  59             *cp = 0;
  60     }
  61
  62     if ((cp = getenv ("MH")) && *cp) {
  63         defpath = path (cp, TFILE);
  64         if ((ib = FOpen (defpath, "r", "MHFD", 0)) == NULL)
  65             adios (defpath, "unable to read");
  66         if (*cp != '/')
  67             (void) m_putenv ("MH", defpath);
  68     }
  69     else {
  70         defpath = concat (mypath, "/", mh_profile, NULLCP);
  71
  72         if ((ib = FOpen (defpath, "r", "MHFD", 0)) == NULL)
  73             switch (pid = vfork ()) {
  74                 case NOTOK:
  75                     adios ("fork", "unable to");
  76
  77                 case OK:
  78                     (void) setgid (getgid ());
  79                     (void) setuid (getuid ());
  80
  81                     execlp (installproc, "install-mh", "-auto", NULLCP);
  82                     fprintf (stderr, "unable to exec ");
  83                     perror (installproc);
  84                     _exit (-1);
  85
  86                 default:
  87                     if (pidwait (pid, OK)
  88                             || (ib = fopen (defpath, "r")) == NULL)
  89                         adios (NULLCP, "[install-mh aborted]");
  90             }
  91     }
  92
  93 #if     defined (notdef) || defined (COMPAT)
  94     ctx = context;
  95 #endif  /* notdef or COMPAT */
  96     m_readefs (&m_defs, ib, mh_profile, 0);
  97     (void) FClose (ib);
  98
  99     if ((pp = m_find ("path")) != NULL && *pp) {
 100         if (*pp != '/')
 101             (void) sprintf (buf, "%s/%s", mypath, pp);
 102         else
 103             (void) strcpy (buf, pp);
 104         if (stat(buf, &st) == NOTOK) {
 105             if (errno != ENOENT)
 106                 adios (buf, "error opening");
 107             cp = concat ("Your MH-directory \"", buf,
 108                 "\" doesn't exist; Create it? ", NULLCP);
 109             if (!getanswer(cp))
 110                 adios (NULLCP, "unable to access MH-directory \"%s\"", buf);
 111             free (cp);
 112             if (!makedir (buf))
 113                 adios (NULLCP, "unable to create", buf);
 114         }
 115     }
 116
 117 #ifdef  COMPAT
 118     if (strcmp (ctx, "/dev/null") == 0)
 119         return;                 /* called by install-mh */
 120
 121     if (access (ctxpath = getcpy (m_maildir (ctx)), 0) == NOTOK)
 122         switch (pid = fork ()) {
 123             case NOTOK:
 124                 adios ("fork", "unable to");
 125
 126             case OK:
 127                 (void) setgid (getgid ());
 128                 (void) setuid (getuid ());
 129                 fprintf (stderr, "install-mh -compat\n");
 130
 131                 execlp (installproc, "install-mh", "-compat", NULLCP);
 132                 fprintf (stderr, "unable to exec ");
 133                 perror (installproc);
 134                 _exit (-1);
 135
 136             default:
 137                 if (pidwait (pid, OK) || access (ctxpath, 0) == NOTOK)
 138                     adios (NULLCP, "[install-mh aborted]");
 139
 140                 if ((ib = fopen (defpath, "r")) == NULL)
 141                     adios (defpath, "unable to read");
 142                 m_readefs (&m_defs, ib, mh_profile, 0);
 143                 (void) FClose (ib);
 144         }
 145     free (ctxpath);
 146 #endif  /* COMPAT */
 147
 148     if ((cp = getenv ("MHCONTEXT")) == NULL || *cp == 0)
 149         cp = context;
 150     if ((ib = FOpen (ctxpath = getcpy (m_maildir (cp)), "r", "MHCONTEXTFD", 1))
 151                 == NULL) {
 152 #ifdef  notdef                  /* XXX */
 153         if (cp != ctx)
 154             adios (ctxpath, "unable to read");
 155 #endif  /* notdef */
 156     }
 157     else {
 158         m_readefs ((struct node **) 0, ib, cp, 1);
 159         (void) FClose (ib);
 160     }
 161 }
 162
 163 /* \f */
 164
 165 #ifdef  OVERHEAD
 166 int     fd_def = NOTOK;
 167 int     fd_ctx = NOTOK;
 168
 169
 170 static FILE *FOpen (filename, mode, envariable, ctx)
 171 register char   *filename,
 172                 *mode,
 173                 *envariable;
 174 register int     ctx;
 175 {
 176     register int    fd;
 177     register char  *cp;
 178     char    buffer[10];
 179     struct stat st1;
 180     register    FILE * fp;
 181
 182     if ((cp = getenv (envariable)) == NULL || *cp == 0)
 183         goto not_open;
 184
 185     if ((fd = atoi (cp)) <= fileno (stderr)) {
 186         advise (NULLCP, "bad value for $%s: %s", envariable, cp);
 187         (void) unputenv (envariable);
 188         return fopen (filename, mode);
 189     }
 190     if (ctx)
 191         fd_ctx = fd;
 192     else
 193         fd_def = fd;
 194
 195     if (fstat (fd, &st1) == NOTOK) {
 196 not_open: ;
 197         if ((fp = fopen (filename, mode))
 198                 && !strcmp (mode, "r")
 199                 && fileno (fp) > fileno (stderr)) {
 200             (void) sprintf (buffer, "%d", fileno (fp));
 201             if (!m_putenv (envariable, buffer))
 202                 if (ctx)
 203                     fd_ctx = fileno (fp);
 204                 else
 205                     fd_def = fileno (fp);
 206         }
 207
 208         if ((cp = getenv ("MHFDEBUG")) && *cp)
 209             fprintf (stderr, "FOpen of %s sets %d\n", filename, fileno (fp));
 210         return fp;
 211     }
 212
 213     (void) lseek (fd, (off_t)0, 0);
 214     return fdopen (fd, mode);
 215 }
 216
 217
 218 static int  FClose (f)
 219 register FILE   *f;
 220 {
 221     register int    d1,
 222                     d2,
 223                     i;
 224     register char  *cp;
 225
 226     if (f == NULL)
 227         return OK;
 228
 229     if ((d1 = fileno (f)) != fd_def && d1 != fd_ctx)
 230         return fclose (f);
 231
 232     d2 = dup (d1);
 233     i = fclose (f);
 234
 235     if (d2 != NOTOK) {
 236         (void) dup2 (d2, d1);
 237         (void) close (d2);
 238     }
 239     else
 240         if (d1 == fd_def)
 241             fd_def = NOTOK;
 242         else
 243             fd_ctx = NOTOK;
 244
 245     if ((cp = getenv ("MHFDEBUG")) && *cp)
 246         fprintf (stderr, "FClose emulating close of %d (%d)\n", d1, d2);
 247     return i;
 248 }
 249 #endif  /* OVERHEAD */