1#include "f2c.h"
2#undef abs
3#ifdef KR_headers
4extern char *F77_aloc(), *getenv();
5#else
6#include <stdlib.h>
7#include <string.h>
8extern char *F77_aloc(ftnlen, char*);
9#endif
10
11/*
12 * getenv - f77 subroutine to return environment variables
13 *
14 * called by:
15 *	call getenv (ENV_NAME, char_var)
16 * where:
17 *	ENV_NAME is the name of an environment variable
18 *	char_var is a character variable which will receive
19 *		the current value of ENV_NAME, or all blanks
20 *		if ENV_NAME is not defined
21 */
22
23#ifdef KR_headers
24 VOID
25G77_getenv_0 (fname, value, flen, vlen) char *value, *fname; ftnlen vlen, flen;
26#else
27 void
28G77_getenv_0 (char *fname, char *value, ftnlen flen, ftnlen vlen)
29#endif
30{
31	char buf[256], *ep, *fp;
32	integer i;
33
34	if (flen <= 0)
35		goto add_blanks;
36	for(i = 0; i < sizeof(buf); i++) {
37		if (i == flen || (buf[i] = fname[i]) == ' ') {
38			buf[i] = 0;
39			ep = getenv(buf);
40			goto have_ep;
41			}
42		}
43	while(i < flen && fname[i] != ' ')
44		i++;
45	strncpy(fp = F77_aloc(i+1, "getenv_"), fname, (int)i);
46	fp[i] = 0;
47	ep = getenv(fp);
48	free(fp);
49 have_ep:
50	if (ep)
51		while(*ep && vlen-- > 0)
52			*value++ = *ep++;
53 add_blanks:
54	while(vlen-- > 0)
55		*value++ = ' ';
56	}
57