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/*
* $Id: list.c,v 2.2 2004/12/13 08:54:43 markus Exp $
*
****************************************************************************
*
* MODULE: GRASS 5 gis library, list.c
* AUTHOR(S): unknown
* PURPOSE: list elements
* COPYRIGHT: (C) 2000 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
*****************************************************************************/
/**********************************************************************
* G_list_element (element, desc, mapset, lister)
*
* char *element database element (eg, "cell", "cellhd", etc)
* char *desc desc for element (if NULL, element is used)
* char *mapset mapset to be listed.
* "" to list all mapsets in mapset search list
* "." will list current mapset
*
* int (*lister)() if given will call this routine to get a list
* title. NULL if no titles desired.
*
* lister (name, mapset, buf)
* char *name, *mapset, *buf
*
* given file 'name', and 'mapset',
* lister() should copy a string into 'buf'
*
* when called with name == "", should set buf
* to general title for mapset list.
*
* General purpose list function. Will list files from all mapsets
* in the mapset list for a specified database element.
*
* note:
* output is to stdout piped thru the more utility
*********************************************************************/
#include "gis.h"
#include "glocale.h"
#include <unistd.h>
#include <signal.h>
#include <string.h>
static int broken_pipe;
static int hit_return = 0;
static int list_element(FILE *,char *,char *,char *,int (*)());
static void sigpipe_catch(int);
int G_set_list_hit_return(int flag)
{
hit_return = flag;
return 0;
}
int G_list_element (
char *element,
char *desc,
char *mapset,
int (*lister)())
{
int n;
FILE *more;
int count;
#ifdef SIGPIPE
void (*sigpipe)();
#endif
/* must catch broken pipe in case "more" quits */
broken_pipe = 0;
#ifdef SIGPIPE
sigpipe = signal (SIGPIPE, sigpipe_catch);
#endif
count = 0;
if (desc == 0 || *desc == 0)
desc = element;
/*
* G_popen() the more command to page the output
*/
if (isatty(1))
{
more = G_popen ("$GRASS_PAGER","w");
if (!more) more = stdout;
}
else
more = stdout;
fprintf (more,"----------------------------------------------\n");
/*
* if no specific mapset is requested, list the mapsets
* from the mapset search list
* otherwise just list the specified mapset
*/
if (mapset == 0 || *mapset == 0)
for (n = 0; !broken_pipe && (mapset = G__mapset_name (n)); n++)
count += list_element (more, element, desc, mapset, lister);
else
count += list_element (more, element, desc, mapset, lister);
if (!broken_pipe)
{
if (count == 0){
if (mapset == 0 || *mapset == 0)
fprintf (more,_("no %s files available in current mapset\n"), desc);
else
fprintf (more,_("no %s files available in mapset %s\n"), desc, mapset);
}
fprintf (more,"----------------------------------------------\n");
}
/*
* close the more
*/
if (more != stdout) G_pclose (more);
#ifdef SIGPIPE
signal (SIGPIPE, sigpipe);
#endif
if (hit_return && isatty(1))
{
fprintf (stderr, _("hit RETURN to continue -->"));
while (getchar() != '\n')
;
}
return 0;
}
static void sigpipe_catch(int n)
{
broken_pipe = 1;
signal (n,sigpipe_catch);
}
static int list_element( FILE *out, char *element,
char *desc, char *mapset, int (*lister)())
{
char path[1000];
char buf[400];
FILE *ls;
FILE *G_popen();
int count;
count = 0;
/*
* convert . to current mapset
*/
if (strcmp (mapset,".") == 0)
mapset = G_mapset();
/*
* get the full name of the GIS directory within the mapset
* and list its contents (if it exists)
*
* if lister() routine is given, the ls command must give 1 name
*/
G__file_name (path, element, "", mapset);
if(access(path, 0) == 0)
{
/*
* if a title so that we can call lister() with the names
* otherwise the ls must be forced into columnar form.
*/
if (lister)
sprintf(buf,"ls '%s'", path);
else
sprintf(buf,"ls -C '%s'", path);
if ((ls = G_popen(buf,"r")))
{
while (!broken_pipe && fgets(buf, sizeof buf, ls))
{
if (count++ == 0)
{
fprintf(out, _("%s files available in mapset %s:\n"), desc, mapset);
if (lister)
{
char title[400];
char name[30];
*name = *title = 0;
lister (name, mapset, title);
if (*title)
fprintf(out,"\n%-18s %-.60s\n",name,title);
}
}
if (lister)
{
char *b;
char title[400];
/* remove the trailing newline */
for (b = buf; *b; b++)
if (*b == '\n')
*b = 0;
lister (buf, mapset, title);
fprintf(out,"%-18s %-.60s\n",buf,title);
}
else
fprintf(out,"%s", buf);
}
G_pclose (ls);
}
}
if (!broken_pipe && (count > 0))
fprintf(out,"\n");
return count;
}
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