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Annotation of 43BSD/usr.lib/libU77/getenv_.c, revision 1.1.1.1

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:  *     @(#)getenv_.c   5.1     6/7/85
                      7:  */
                      8: 
                      9: /*
                     10:  * return environment variables
                     11:  *
                     12:  * calling sequence:
                     13:  *     character*20 evar
                     14:  *     call getenv (ENV_NAME, evar)
                     15:  * where:
                     16:  *     ENV_NAME is the name of an environment variable
                     17:  *     evar is a character variable which will receive
                     18:  *             the current value of ENV_NAME,
                     19:  *             or all blanks if ENV_NAME is not defined
                     20:  */
                     21: 
                     22: extern char **environ;
                     23: 
                     24: getenv_(fname, value, flen, vlen)
                     25: char *value, *fname;
                     26: long int vlen, flen;
                     27: {
                     28:        register char *ep, *fp;
                     29:        register char **env = environ;
                     30:        int i;
                     31: 
                     32:        while (ep = *env++) {
                     33:                for (fp=fname, i=0; i <= flen; i++) {
                     34:                        if (i == flen || *fp == ' ') {
                     35:                                if (*ep++ == '=') {
                     36:                                        b_char(ep, value, vlen);
                     37:                                        return(0);
                     38:                                }
                     39:                                else break;
                     40:                        }
                     41:                        else if (*ep++ != *fp++) break;
                     42:                }
                     43:        }
                     44:        b_char(" ", value, vlen);
                     45:        return(0);
                     46: }

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