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

1.1     ! root        1: /*
        !             2: char   id_rename[] = "@(#)rename_.c    1.2";
        !             3:  *
        !             4:  * rename a file atomically
        !             5:  *
        !             6:  * synopsis:
        !             7:  *     integer function rename (from, to)
        !             8:  *     character*(*) from, to
        !             9:  *
        !            10:  * where:
        !            11:  *     return value will be zero normally, an error number otherwise.
        !            12:  */
        !            13: 
        !            14: #include "../libI77/f_errno.h"
        !            15: #include <sys/param.h>
        !            16: #ifndef        MAXPATHLEN
        !            17: #define MAXPATHLEN     128
        !            18: #endif
        !            19: 
        !            20: long
        !            21: rename_ (from, to, frlen, tolen)
        !            22: char   *from, *to;
        !            23: long   frlen, tolen;
        !            24: {
        !            25:        char    frbuf[MAXPATHLEN];
        !            26:        char    tobuf[MAXPATHLEN];
        !            27: 
        !            28:        if (frlen <= 0 || tolen <= 0 || *from == ' ' || *to == ' ')
        !            29:                return ((long)(errno = F_ERARG));
        !            30:        if (frlen >= sizeof frbuf || tolen >= sizeof tobuf)
        !            31:                return ((long)(errno = F_ERARG));
        !            32:        g_char (from, frlen, frbuf);
        !            33:        g_char (to, tolen, tobuf);
        !            34:        if (rename (from, to) != 0)
        !            35:                return ((long)errno);
        !            36:        return (0L);
        !            37: }

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