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Annotation of 43BSD/usr.lib/libU77/access_.c, revision 1.1.1.1

1.1       root        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: }

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