1 /*
2 * Copyright (C) 2014, Lanedo <martyn@lanedo.com>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 */
19
20 #include "config.h"
21
22 #include <unistd.h>
23 #include <errno.h>
24
25 #include <glib/gi18n.h>
26
27 #include "tracker-help.h"
28
29 static void
setup_man_path(void)30 setup_man_path (void)
31 {
32 GString *new_path = g_string_new ("");
33 const char *old_path = g_getenv ("MANPATH");
34
35 /* We should always put ':' after our path. If there is no
36 * old_path, the ':' at the end will let 'man' to try
37 * system-wide paths after ours to find the manual page. If
38 * there is old_path, we need ':' as delimiter. */
39 g_string_append (new_path, MANDIR);
40 g_string_append_c (new_path, ':');
41
42 if (old_path) {
43 g_string_append (new_path, old_path);
44 }
45
46 g_setenv ("MANPATH", new_path->str, TRUE);
47
48 g_string_free (new_path, TRUE);
49 }
50
51 static int
exec_man_man(const char * path,const char * page)52 exec_man_man (const char *path, const char *page)
53 {
54 if (!path) {
55 path = "man";
56 }
57
58 execlp (path, "man", page, (char *) NULL);
59 g_warning(_("failed to exec “%s”: %s"), path, strerror (errno));
60
61 return -1;
62 }
63
64 static int
exec_man_cmd(const char * cmd,const char * page)65 exec_man_cmd (const char *cmd, const char *page)
66 {
67 gchar *shell_cmd;
68
69 shell_cmd = g_strdup_printf ("%s %s", cmd, page);
70 execl ("/bin/sh", "sh", "-c", shell_cmd, (char *) NULL);
71 g_warning (_("failed to exec “%s”: %s"), cmd, strerror (errno));
72 g_free (shell_cmd);
73
74 return -1;
75 }
76
77 static char *
cmd_to_page(const char * cmd)78 cmd_to_page (const char *cmd)
79 {
80 if (!cmd) {
81 return g_strdup ("tracker");
82 } else if (g_str_has_prefix (cmd, "tracker")) {
83 return g_strdup (cmd);
84 } else {
85 return g_strdup_printf ("tracker-%s", cmd);
86 }
87 }
88
89 int
tracker_help_show_man_page(const char * cmd)90 tracker_help_show_man_page (const char *cmd)
91 {
92 const char *page = cmd_to_page (cmd);
93
94 setup_man_path ();
95
96 if (0) {
97 exec_man_cmd ("man", page);
98 }
99
100 return exec_man_man ("man", page);
101 }
102
103