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Annotation of 43BSD/contrib/rn/artio.c, revision 1.1

1.1     ! root        1: /* $Header: artio.c,v 4.3 85/05/01 11:35:39 lwall Exp $
        !             2:  *
        !             3:  * $Log:       artio.c,v $
        !             4:  * Revision 4.3  85/05/01  11:35:39  lwall
        !             5:  * Baseline for release with 4.3bsd.
        !             6:  * 
        !             7:  */
        !             8: 
        !             9: #include "EXTERN.h"
        !            10: #include "common.h"
        !            11: #include "INTERN.h"
        !            12: #include "artio.h"
        !            13: 
        !            14: void
        !            15: artio_init()
        !            16: {
        !            17:     ;
        !            18: }
        !            19: 
        !            20: /* open an article, unless it's already open */
        !            21: 
        !            22: FILE *
        !            23: artopen(artnum)
        !            24: ART_NUM artnum;
        !            25: {
        !            26:     char artname[8];                   /* filename of current article */
        !            27: 
        !            28:     if (artnum < 1)
        !            29:        return Nullfp;
        !            30:     if (openart == artnum) {           /* this article is already open? */
        !            31:        fseek(artfp,0L,0);              /* just get to the beginning */
        !            32:        return artfp;                   /* and say we succeeded */
        !            33:     }
        !            34:     if (artfp != Nullfp) {             /* it was somebody else? */
        !            35:        fclose(artfp);                  /* put them out of their misery */
        !            36:        openart = 0;                    /* and remember them no more */
        !            37:     }
        !            38:     sprintf(artname,"%ld",(long)artnum);
        !            39:                                        /* produce the name of the article */
        !            40:     if (artfp = fopen(artname,"r"))    /* if we can open it */
        !            41:        openart = artnum;               /* remember what we did here */
        !            42: #ifdef LINKART
        !            43:     {
        !            44:        char tmpbuf[256];
        !            45:        char *s;
        !            46: 
        !            47:        if (fstat(artfp->_file,&filestat))
        !            48:            return artfp;
        !            49:        if (filestat.st_size < (sizeof tmpbuf)) {
        !            50:            fgets(tmpbuf,(sizeof tmpbuf),artfp);
        !            51:            if (*tmpbuf == '/') {       /* is a "link" to another article */
        !            52:                fclose(artfp);
        !            53:                if (s=index(tmpbuf,'\n'))
        !            54:                    *s = '\0';
        !            55:                if (!(artfp = fopen(tmpbuf,"r")))
        !            56:                    openart = 0;
        !            57:                else {
        !            58:                    if (*linkartname)
        !            59:                        free(linkartname);
        !            60:                    linkartname = savestr(tmpbuf);
        !            61:                }
        !            62:            }
        !            63:            else
        !            64:                fseek(artfp,0L,0);              /* get back to the beginning */
        !            65:        }
        !            66:     }
        !            67: #endif
        !            68:     return artfp;                      /* and return either fp or NULL */
        !            69: }
        !            70: 

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