GRASS GIS 8 Programmer's Manual  8.5.0dev(2024)-b4187339ee
make_mapset.c
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1 /*!
2  * \file lib/gis/make_mapset.c
3  *
4  * \brief GIS Library - Functions to create a new mapset within an
5  * existing location
6  *
7  * (C) 2006-2013 by the GRASS Development Team
8  *
9  * This program is free software under the GNU General Public License
10  * (>=v2). Read the file COPYING that comes with GRASS for details.
11  *
12  * \author Joel Pitt, joel.pitt@gmail.com
13  */
14 
15 #include <stdlib.h>
16 #include <string.h>
17 #include <unistd.h>
18 #include <sys/stat.h>
19 
20 #include <grass/gis.h>
21 #include <grass/glocale.h>
22 
23 /*!
24  * \brief Create a new mapset
25  *
26  * This function creates a new mapset in the given location,
27  * initializes default window and the current window.
28  *
29  * Calls G_fatal_error() if location doesn't exist.
30  *
31  * \param gisdbase_name full path of GISDBASE to create mapset in
32  * (NULL for the current GISDBASE)
33  * \param location_name name of location to create mapset in
34  * (NULL for the current location)
35  * \param mapset_name Name of the new mapset. Should not include
36  * the full path, the mapset will be created within
37  * the specified database and location.
38  *
39  * \return 0 on success
40  * \return -1 to indicate a system error (check errno).
41  * \return -2 illegal name
42  */
43 int G_make_mapset(const char *gisdbase_name, const char *location_name,
44  const char *mapset_name)
45 {
46  char path[GPATH_MAX];
47  struct Cell_head default_window;
48 
49  /* Get location */
50  if (location_name == NULL)
51  location_name = G_location();
52 
53  /* Get GISDBASE */
54  if (gisdbase_name == NULL)
55  gisdbase_name = G_gisdbase();
56 
57  /* TODO: Should probably check that user specified location and gisdbase are
58  * valid */
59 
60  /* check if mapset name is legal */
61  if (G_legal_filename(mapset_name) != 1)
62  return -2;
63 
64  /* Check if location exists */
65  sprintf(path, "%s/%s", gisdbase_name, location_name);
66  if (access(path, F_OK) == -1)
67  G_fatal_error(_("Location <%s> doesn't exist"), location_name);
68 
69  /* Make the mapset */
70  sprintf(path, "%s/%s/%s", gisdbase_name, location_name, mapset_name);
71  if (G_mkdir(path) != 0) {
72  perror("G_make_mapset");
73  return -1;
74  }
76 
77  /* Get PERMANENT default window */
78  G_setenv_nogisrc("GISDBASE", gisdbase_name);
79  G_setenv_nogisrc("LOCATION_NAME", location_name);
80  G_setenv_nogisrc("MAPSET", "PERMANENT");
81  G_get_default_window(&default_window);
82 
83  /* Change to the new mapset */
84  G_setenv_nogisrc("MAPSET", mapset_name);
85 
86  /* Copy default window/regions to new mapset */
87  G_put_element_window(&default_window, "", "WIND");
88 
89  /* And switch back to original environment */
90  G_switch_env();
91 
92  return 0;
93 }
#define NULL
Definition: ccmath.h:32
void G_switch_env(void)
Switch environments.
Definition: env.c:591
void void void void G_fatal_error(const char *,...) __attribute__((format(printf
const char * G_gisdbase(void)
Get name of top level database directory.
Definition: gisdbase.c:26
int G_legal_filename(const char *)
Check for legal database file name.
Definition: legal_name.c:34
void G_get_default_window(struct Cell_head *)
Get the default region.
Definition: get_window.c:95
void G_create_alt_env(void)
Set up alternative environment variables.
Definition: env.c:569
const char * G_location(void)
Get current location name.
Definition: location.c:32
int G_put_element_window(const struct Cell_head *, const char *, const char *)
Write the region.
Definition: put_window.c:74
int G_mkdir(const char *)
Creates a new directory.
Definition: paths.c:27
void G_setenv_nogisrc(const char *, const char *)
Set environment name to value (doesn't update .gisrc)
Definition: env.c:472
#define GPATH_MAX
Definition: gis.h:194
#define _(str)
Definition: glocale.h:10
int G_make_mapset(const char *gisdbase_name, const char *location_name, const char *mapset_name)
Create a new mapset.
Definition: make_mapset.c:43
2D/3D raster map header (used also for region)
Definition: gis.h:439
Definition: path.h:15