4.3BSD - /usr/ingres/source/iutil/getuser.c

   1: # include   <stdio.h>
   2: # include   <ingres.h>
   3: # include   <aux.h>
   4: # include   <sccs.h>
   5: 
   6: SCCSID(@(#)getuser.c	8.1	12/31/84)
   7: 
   8: /*
   9: **  GET LINE FROM USER FILE
  10: **
  11: **	Given a user code (a two byte string), this routine returns
  12: **	the line from .../files/users into `buf'.  The users
  13: **	file is automatically opened, and it is closed if getperm
  14: **	is called with `code' == 0.
  15: **
  16: **	If `code' == -1 then getuser will reinitialize itself.
  17: **	This will guarantee that getuser will reopen the file
  18: **	if (for example) an interrupt occured during the previous
  19: **	call.
  20: */
  21: 
  22: getuser(code, buf)
  23: char    *code;
  24: char    buf[];
  25: {
  26:     static FILE *userf;
  27:     register char   c;
  28:     register char   *bp;
  29:     extern char *index();
  30: 
  31:     if (code == 0)
  32:     {
  33:         if (userf != NULL)
  34:             fclose(userf);
  35:         userf = NULL;
  36:         return (0);
  37:     }
  38:     if (code == (char *) -1)
  39:     {
  40:         userf = NULL;
  41:         return (0);
  42:     }
  43:     if (userf == NULL)
  44:     {
  45:         userf = fopen(ztack(Pathname, "/files/users"), "r");
  46:         if (userf == NULL)
  47:             syserr("getuser: open err");
  48:     }
  49:     rewind(userf);
  50: 
  51:     for (;;)
  52:     {
  53:         bp = buf;
  54:         if (fgets(bp, MAXLINE, userf) == NULL)
  55:             return (1);
  56:         *index(bp, '\n') = '\0';
  57:         while ((c = *bp++) != ':')
  58:             if (c == '\0')
  59:                 return (1);
  60:         if (bequal(bp, code, 2))
  61:             return (0);
  62:     }
  63: }

Defined functions