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

1.1     ! root        1: /*
        !             2: char id_getenv[] = "@(#)getenv_.c      1.1";
        !             3:  *
        !             4:  * return environment variables
        !             5:  *
        !             6:  * calling sequence:
        !             7:  *     character*20 evar
        !             8:  *     call getenv (ENV_NAME, evar)
        !             9:  * where:
        !            10:  *     ENV_NAME is the name of an environment variable
        !            11:  *     evar is a character variable which will receive
        !            12:  *             the current value of ENV_NAME,
        !            13:  *             or all blanks if ENV_NAME is not defined
        !            14:  */
        !            15: 
        !            16: extern char **environ;
        !            17: 
        !            18: getenv_(fname, value, flen, vlen)
        !            19: char *value, *fname;
        !            20: long int vlen, flen;
        !            21: {
        !            22:        register char *ep, *fp;
        !            23:        register char **env = environ;
        !            24:        int i;
        !            25: 
        !            26:        while (ep = *env++) {
        !            27:                for (fp=fname, i=0; i <= flen; i++) {
        !            28:                        if (i == flen || *fp == ' ') {
        !            29:                                if (*ep++ == '=') {
        !            30:                                        b_char(ep, value, vlen);
        !            31:                                        return(0);
        !            32:                                }
        !            33:                                else break;
        !            34:                        }
        !            35:                        else if (*ep++ != *fp++) break;
        !            36:                }
        !            37:        }
        !            38:        b_char(" ", value, vlen);
        !            39:        return(0);
        !            40: }

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