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Annotation of 43BSD/usr.lib/libU77/rename_.c, revision 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:  *     @(#)rename_.c   5.1     6/7/85
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * rename a file atomically
        !            11:  *
        !            12:  * synopsis:
        !            13:  *     integer function rename (from, to)
        !            14:  *     character*(*) from, to
        !            15:  *
        !            16:  * where:
        !            17:  *     return value will be zero normally, an error number otherwise.
        !            18:  */
        !            19: 
        !            20: #include "../libI77/f_errno.h"
        !            21: #include <sys/param.h>
        !            22: #ifndef        MAXPATHLEN
        !            23: #define MAXPATHLEN     128
        !            24: #endif
        !            25: 
        !            26: long
        !            27: rename_ (from, to, frlen, tolen)
        !            28: char   *from, *to;
        !            29: long   frlen, tolen;
        !            30: {
        !            31:        char    frbuf[MAXPATHLEN];
        !            32:        char    tobuf[MAXPATHLEN];
        !            33: 
        !            34:        if (frlen <= 0 || tolen <= 0 || *from == ' ' || *to == ' ')
        !            35:                return ((long)(errno = F_ERARG));
        !            36:        if (frlen >= sizeof frbuf || tolen >= sizeof tobuf)
        !            37:                return ((long)(errno = F_ERARG));
        !            38:        g_char (from, frlen, frbuf);
        !            39:        g_char (to, tolen, tobuf);
        !            40:        if (rename (from, to) != 0)
        !            41:                return ((long)errno);
        !            42:        return (0L);
        !            43: }

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