2.11BSD#431 - /usr/src/usr.lib/libU77/access_.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)access_.c	5.1	6/7/85
   7:  */
   8: 
   9: /*
  10:  * determine accessability of a file
  11:  *
  12:  * calling format:
  13:  *	integer access
  14:  *	ierror = access(filename, mode)
  15:  * where:
  16:  *	ierror will be 0 for successful access; an error number otherwise.
  17:  *	filename is a character string
  18:  *	mode is a character string which may include any combination of
  19:  *	'r', 'w', 'x', ' '. (' ' => test for existence)
  20:  */
  21: 
  22: #include "../libI77/f_errno.h"
  23: #include <sys/param.h>
  24: #ifndef MAXPATHLEN
  25: #define MAXPATHLEN  128
  26: #endif
  27: 
  28: long access_(name, mode, namlen, modlen)
  29: char *name, *mode;
  30: long namlen, modlen;
  31: {
  32:     char buf[MAXPATHLEN];
  33:     int m = 0;
  34: 
  35:     if (namlen >= sizeof buf)
  36:         return((long)(errno=F_ERARG));
  37:     g_char(name, namlen, buf);
  38:     if (buf[0] == '\0')
  39:         return((long)(errno=ENOENT));
  40:     if (access(buf, 0) < 0)
  41:         return((long)errno);
  42:     while (modlen--) switch(*mode++)
  43:     {
  44:         case 'x':
  45:             m |= 1;
  46:             break;
  47: 
  48:         case 'w':
  49:             m |= 2;
  50:             break;
  51: 
  52:         case 'r':
  53:             m |= 4;
  54:             break;
  55:     }
  56:     if (m > 0 && access(buf, m) < 0)
  57:         return((long)errno);
  58:     return(0L);
  59: }

Defined functions

Defined macros