GRASS GIS 7 Programmer's Manual  7.5.svn(2018)-r73111
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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 valid */
58 
59  /* check if mapset name is legal */
60  if (G_legal_filename(mapset_name) != 1)
61  return -2;
62 
63  /* Check if location exists */
64  sprintf(path, "%s/%s", gisdbase_name, location_name);
65  if (access(path, F_OK ) == -1)
66  G_fatal_error(_("Location <%s> doesn't exist"), location_name);
67 
68  /* Make the mapset */
69  sprintf(path, "%s/%s/%s", gisdbase_name, location_name, mapset_name);
70  if (G_mkdir(path) != 0) {
71  perror("G_make_mapset");
72  return -1;
73  }
75 
76  /* Get PERMANENT default window */
77  G_setenv_nogisrc("GISDBASE", gisdbase_name);
78  G_setenv_nogisrc("LOCATION", location_name);
79  G_setenv_nogisrc("MAPSET", "PERMANENT");
80  G_get_default_window(&default_window);
81 
82  /* Change to the new mapset */
83  G_setenv_nogisrc("MAPSET", mapset_name);
84 
85  /* Copy default window/regions to new mapset */
86  G_put_element_window(&default_window, "", "WIND");
87 
88  /* And switch back to original environment */
89  G_switch_env();
90 
91  return 0;
92 }
93 
const char * G_location(void)
Get current location name.
Definition: location.c:32
int G_mkdir(const char *path)
Creates a new directory.
Definition: paths.c:27
2D/3D raster map header (used also for region)
Definition: gis.h:390
#define NULL
Definition: ccmath.h:32
void G_create_alt_env(void)
Set up alternative environment variables.
Definition: env.c:544
void G_fatal_error(const char *msg,...)
Print a fatal error message to stderr.
Definition: gis/error.c:160
void G_setenv_nogisrc(const char *name, const char *value)
Set environment name to value (doesn&#39;t update .gisrc)
Definition: env.c:448
#define GPATH_MAX
Definition: gis.h:151
int G_put_element_window(const struct Cell_head *window, const char *dir, const char *name)
Write the region.
Definition: put_window.c:74
void G_get_default_window(struct Cell_head *window)
Get the default region.
Definition: get_window.c:93
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
const char * G_gisdbase(void)
Get name of top level database directory.
Definition: gisdbase.c:26
Definition: path.h:16
#define _(str)
Definition: glocale.h:13
void G_switch_env(void)
Switch environments.
Definition: env.c:565