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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <stdio.h>
#include <string.h>
#define import_spp
#define import_xnames
#include <iraf.h>
#define isspace(c) ((c)==' '||(c)=='\t'||(c)=='\n')
#define SETENV "zzsetenv.def"
#define SZ_VALUE SZ_COMMAND
#define MAXLEV 8
#define PKGLIBS "pkglibs"
#define IRAFARCH "IRAFARCH"
#define ARCH "arch"
extern char *_os_getenv (char *envvar, char *outstr, int maxch);
extern char *os_getenv (char *envvar);
extern char *os_strpak (XCHAR *sppstr, char *cstr, int maxch);
extern char *vfn2osfn (char *vfn, int new);
extern XCHAR *os_strupk (char *str, XCHAR *outstr, int maxch);
extern void os_putenv (char *name, char *value);
extern int bdebug;
void _envinit (void);
void loadenv (char *osfn);
/* LOADPKGENV -- Load the environment definitions for the named package.
* [e.g., loadpkgenv ("noao")]. This assumes that the root directory of
* the named package is already defined, and that this directory contains
* a subdirectory lib containing the file zzsetenv.def. If none of these
* assumptions are true, call loadenv(osfn) with the host filename of the
* file to be loaded.
*/
void
loadpkgenv (char *pkg)
{
char vfn[SZ_PATHNAME+1];
char pkglibs[SZ_COMMAND+1];
char newlibs[SZ_COMMAND+1];
/* Initialize the default IRAF environment. */
_envinit();
/* If no package name is given or the IRAF environment is being
* loaded we are done.
*/
if (!pkg || strcmp(pkg,"iraf")==0)
return;
strcpy (vfn, pkg);
strcat (vfn, "$lib/");
strcat (vfn, SETENV);
/* Load the package environment. The new values are added to the
* environment in the conventional way except for the value of
* "pkglibs". As each package environment is loaded we want to
* add the newly defined package libraries to the current list
* of package libraries, otherwise the most recent package environment
* overrides the earlier ones. It is still possible that user
* defined environment variables will be redefined but there is
* little we can do about that; "pkglibs" is special though since
* it is a part of the loadpkgenv facility.
*/
_os_getenv (PKGLIBS, pkglibs, SZ_COMMAND);
loadenv (vfn2osfn (vfn, 0));
_os_getenv (PKGLIBS, newlibs, SZ_COMMAND);
if (strlen(newlibs) > 0 && strcmp (newlibs, pkglibs)) {
char *ip, *op;
char *otop;
/* Find the end of the current pkglibs file list. */
for (ip=op=pkglibs; *ip; ip++)
if (!isspace(*ip))
op = ip + 1;
/* Concatenate the new files list segment. */
if (op > pkglibs)
*op++ = ',';
for (ip=newlibs, otop=pkglibs+SZ_COMMAND; *ip && op < otop; ip++)
if (!isspace(*ip))
*op++ = *ip;
/* Blank fill to the next SZ_LINE increment to optimize resets. */
while (op < otop && ((op-pkglibs) % SZ_LINE))
*op++ = ' ';
*op++ = EOS;
/* Reset the stored value in the environment. */
os_putenv (PKGLIBS, pkglibs);
}
}
#ifdef NOVOS
void _envinit (void) {}
void loadenv (char *osfn) { printf ("HSI is compiled NOVOS\n"); }
#else
/* ENVINIT -- Initialize the VOS environment list by scanning the file
* hlib$zzsetenv.def. HLIB is defined in terms of HOST which is sufficiently
* well known to have a value before the environment list is loaded.
*/
void
_envinit (void)
{
static int initialized = 0;
char osfn[SZ_PATHNAME+1], *hlib;
char irafarch[SZ_PATHNAME+1];
extern void ENVINIT(), ENVRESET();
if (initialized++)
return;
if ( (hlib = os_getenv ("hlib")) ) {
strcpy (osfn, hlib);
strcat (osfn, SETENV);
} else {
fprintf (stderr, "cannot translate logical name `hlib'");
fflush (stderr);
}
ENVINIT();
loadenv (osfn);
/* If the variable "IRAFARCH" is defined and "arch" is not, add
* a definition for the latter. "arch" is used to construct
* pathnames but the HSI architecture support requires only that
* IRAFARCH be predefined.
*/
if (_os_getenv (IRAFARCH, irafarch, SZ_PATHNAME))
if (!_os_getenv (ARCH, osfn, SZ_PATHNAME)) {
XCHAR x_name[SZ_PATHNAME+1];
XCHAR x_value[SZ_PATHNAME+1];
sprintf (osfn, ".%s", irafarch);
os_strupk (ARCH, x_name, SZ_PATHNAME);
os_strupk (osfn, x_value, SZ_PATHNAME);
ENVRESET (x_name, x_value);
}
}
/* LOADENV -- Load environment definitions from the named host file.
*/
void
loadenv (char *osfn)
{
register char *ip;
register XCHAR *op;
char lbuf[SZ_LINE+1];
char pkname[SZ_FNAME+1], old_value[SZ_VALUE+1];
XCHAR name[SZ_FNAME+1], value[SZ_VALUE+1];
FILE *fp, *sv_fp[MAXLEV];
int lev=0;
extern void ENVRESET();
if ((fp = fopen (osfn, "r")) == NULL) {
printf ("envinit: cannot open `%s'\n", osfn);
fflush (stdout);
return;
}
for (;;) {
/* Get next line from input file. */
if (fgets (lbuf, SZ_LINE, fp) == NULL) {
/* End of file. */
if (lev > 0) {
fclose (fp);
fp = sv_fp[--lev];
continue;
} else
break;
} else {
/* Skip comments and blank lines. */
for (ip=lbuf; isspace(*ip); ip++)
;
if (strncmp (lbuf, "set", 3) != 0) {
if (strncmp (lbuf, "reset", 5) != 0)
continue;
else
ip += 5;
} else
ip += 3;
/* Check for @file inclusion. */
while (isspace(*ip))
ip++;
if (*ip == '@') {
sv_fp[lev++] = fp;
if (lev >= MAXLEV) {
printf ("envinit: nesting too deep\n");
fflush (stdout);
break;
} else {
char *fname;
fname = ++ip;
while (*ip)
if (isspace(*ip)) {
*ip = '\0';
break;
} else
ip++;
if ((fp = fopen (vfn2osfn(fname,0), "r")) == NULL) {
printf ("envinit: cannot open `%s'\n", fname);
fflush (stdout);
break;
}
}
continue;
}
/* fall through */
}
/* Extract name field. */
for (op=name; *ip && *ip != '=' && !isspace(*ip); op++)
*op = *ip++;
*op = XEOS;
/* Extract value field; may be quoted. Newline may be escaped
* to break a long value string over several lines of the input
* file.
*/
for (; *ip && (*ip == '=' || *ip == '"' || isspace (*ip)); ip++)
;
for (op=value; *ip && *ip != '"' && *ip != '\n'; op++)
if (*ip == '\\' && *(ip+1) == '\n') {
again: if (fgets (lbuf, SZ_LINE, fp) == NULL)
break;
for (ip=lbuf; isspace(*ip); ip++)
;
if (*ip == '#')
goto again;
} else
*op = *ip++;
*op = XEOS;
/* Allow the user to override the values of environment variables
* by defining them in their host environment. Once again,
* "pkglibs" requires special treatment as we want to permit
* redefinitions to allow concatenation in loadpkgenv().
*/
os_strpak (name, pkname, SZ_FNAME);
if (strcmp (pkname, PKGLIBS) &&
_os_getenv (pkname, old_value, SZ_VALUE)) {
if (bdebug)
printf ("%s = %s\n", pkname, old_value);
} else
ENVRESET (name, value);
}
fclose (fp);
}
#endif
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