diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/sbr/RCS/m_update.c,v

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   9 date    92.12.15.00.20.22;      author jromine; state Exp;
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  50 @endif sugar
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  53 @/* m_update.c - update the profile */
  54 #ifndef lint
  55 static char ident[] = "@@(#)$Id: m_update.c,v 1.6 1992/12/14 17:54:23 jromine Exp jromine $";
  56 #endif  lint
  57
  58 #include "../h/mh.h"
  59 #include <stdio.h>
  60 #include <signal.h>
  61 #ifndef sigmask
  62 #define sigmask(s)      (1 << ((s) - 1))
  63 #endif  /* not sigmask */
  64
  65 static int      m_chkids();
  66
  67 void m_update () {
  68     int     action;
  69 #ifndef BSD42
  70     TYPESIG (*hstat) (), (*istat) (), (*qstat) (), (*tstat) ();
  71 #else   /* BSD42 */
  72     int     smask;
  73 #endif  /* BSD42 */
  74     register struct node   *np;
  75     FILE * out;
  76
  77     if (!(ctxflags & CTXMOD))
  78         return;
  79     ctxflags &= ~CTXMOD;
  80
  81     if ((action = m_chkids ()) > OK)
  82         return;                 /* child did it for us */
  83
  84 #ifndef BSD42
  85     hstat = signal (SIGHUP, SIG_IGN);
  86     istat = signal (SIGINT, SIG_IGN);
  87     qstat = signal (SIGQUIT, SIG_IGN);
  88     tstat = signal (SIGTERM, SIG_IGN);
  89 #else   /* BSD42 */
  90     smask = sigblock (sigmask (SIGHUP) | sigmask (SIGINT)
  91                         | sigmask (SIGQUIT) | sigmask (SIGTERM));
  92 #endif  /* BSD42 */
  93
  94     if ((out = fopen (ctxpath, "w")) == NULL)
  95         adios (ctxpath, "unable to write");
  96     for (np = m_defs; np; np = np -> n_next)
  97         if (np -> n_context)
  98             fprintf (out, "%s: %s\n", np -> n_name, np -> n_field);
  99     (void) fclose (out);
 100
 101 #ifndef BSD42
 102     (void) signal (SIGHUP, hstat);
 103     (void) signal (SIGINT, istat);
 104     (void) signal (SIGQUIT, qstat);
 105     (void) signal (SIGTERM, tstat);
 106 #else   /* BSD42 */
 107     (void) sigsetmask (smask);
 108 #endif  /* BSD42 */
 109     if (action == OK)
 110         _exit (0);              /* we are child, time to die */
 111 }
 112
 113 /* \f */
 114
 115 /* This hack brought to you so we can handle set[ug]id MH programs.  If we
 116    return NOTOK, then no fork is made, we update .mh_profile normally, and
 117    return to the caller normally.  If we return 0, then the child is
 118    executing, .mh_profile is modified after we set our [ug]ids to the norm.
 119    If we return > 0, then the parent is executed and .mh_profile has
 120    already be modified.  We can just return to the caller immediately. */
 121
 122
 123 static int  m_chkids () {
 124     int     i,
 125             child_id;
 126
 127     if (getuid () == geteuid ())
 128         return (NOTOK);
 129
 130     for (i = 0; (child_id = fork ()) == -1 && i < 5; i++)
 131         sleep (5);
 132     switch (child_id) {
 133         case NOTOK:
 134             break;
 135
 136         case OK:
 137             (void) setgid (getgid ());
 138             (void) setuid (getuid ());
 139             break;
 140
 141         default:
 142             (void) pidwait (child_id, NOTOK);
 143             break;
 144     }
 145
 146     return child_id;
 147 }
 148 @
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 150
 151 1.6
 152 log
 153 @*** empty log message ***
 154 @
 155 text
 156 @d3 1
 157 a3 1
 158 static char ident[] = "@@(#)$Id: m_update.c,v 1.5 1990/04/05 15:31:24 sources Exp jromine $";
 159 d11 1
 160 a11 1
 161 #endif  not sigmask
 162 d19 1
 163 a19 1
 164 #else   BSD42
 165 d21 1
 166 a21 1
 167 #endif  BSD42
 168 d37 1
 169 a37 1
 170 #else   BSD42
 171 d40 1
 172 a40 1
 173 #endif  BSD42
 174 d54 1
 175 a54 1
 176 #else   BSD42
 177 d56 1
 178 a56 1
 179 #endif  BSD42
 180 @
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 183 1.5
 184 log
 185 @add ID
 186 @
 187 text
 188 @d3 1
 189 a3 1
 190 static char ident[] = "@@(#)$Id:$";
 191 @
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 198 text
 199 @d3 1
 200 a3 1
 201 static char ident[] = "$Id:";
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 210 @d2 3
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 218 text
 219 @d10 1
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 222
 223 1.1
 224 log
 225 @Initial revision
 226 @
 227 text
 228 @d14 1
 229 a14 1
 230     int     (*hstat) (), (*istat) (), (*qstat) (), (*tstat) ();
 231 @