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Annotation of 42BSD/usr.lib/libU77/access_.c, revision 1.1

1.1     ! root        1: /*
        !             2: char id_access[] = "@(#)access_.c      1.3";
        !             3:  *
        !             4:  * determine accessability of a file
        !             5:  *
        !             6:  * calling format:
        !             7:  *     integer access
        !             8:  *     ierror = access(filename, mode)
        !             9:  * where:
        !            10:  *     ierror will be 0 for successful access; an error number otherwise.
        !            11:  *     filename is a character string
        !            12:  *     mode is a character string which may include any combination of
        !            13:  *     'r', 'w', 'x', ' '. (' ' => test for existence)
        !            14:  */
        !            15: 
        !            16: #include "../libI77/f_errno.h"
        !            17: #include <sys/param.h>
        !            18: #ifndef        MAXPATHLEN
        !            19: #define MAXPATHLEN     128
        !            20: #endif
        !            21: 
        !            22: long access_(name, mode, namlen, modlen)
        !            23: char *name, *mode;
        !            24: long namlen, modlen;
        !            25: {
        !            26:        char buf[MAXPATHLEN];
        !            27:        int m = 0;
        !            28: 
        !            29:        if (namlen >= sizeof buf)
        !            30:                return((long)(errno=F_ERARG));
        !            31:        g_char(name, namlen, buf);
        !            32:        if (buf[0] == '\0')
        !            33:                return((long)(errno=ENOENT));
        !            34:        if (access(buf, 0) < 0)
        !            35:                return((long)errno);
        !            36:        while (modlen--) switch(*mode++)
        !            37:        {
        !            38:                case 'x':
        !            39:                        m |= 1;
        !            40:                        break;
        !            41: 
        !            42:                case 'w':
        !            43:                        m |= 2;
        !            44:                        break;
        !            45: 
        !            46:                case 'r':
        !            47:                        m |= 4;
        !            48:                        break;
        !            49:        }
        !            50:        if (m > 0 && access(buf, m) < 0)
        !            51:                return((long)errno);
        !            52:        return(0L);
        !            53: }

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