libexplain  1.4.D001
libexplain/iocontrol/vt_activate.c
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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2009-2011, 2013 Peter Miller
00004  *
00005  * This program is free software; you can redistribute it and/or modify it
00006  * under the terms of the GNU Lesser General Public License as published by
00007  * the Free Software Foundation; either version 3 of the License, or (at your
00008  * option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,but WITHOUT
00011  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
00013  * for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public License
00016  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00017  */
00018 
00019 #include <libexplain/ac/sys/ioctl.h>
00020 #include <libexplain/ac/errno.h>
00021 #include <libexplain/ac/linux/vt.h>
00022 #include <libexplain/ac/stdint.h>
00023 
00024 #include <libexplain/buffer/einval.h>
00025 #include <libexplain/buffer/eperm.h>
00026 #include <libexplain/capability.h>
00027 #include <libexplain/iocontrol/generic.h>
00028 #include <libexplain/iocontrol/vt_activate.h>
00029 
00030 #ifdef VT_ACTIVATE
00031 
00032 
00033 static void
00034 print_explanation(const explain_iocontrol_t *p, explain_string_buffer_t *sb, int
00035     errnum, int fildes, int request, const void *data)
00036 {
00037     switch (errnum)
00038     {
00039     case ENXIO:
00040         if ((intptr_t)data <= 0 || (intptr_t)data > MAX_NR_CONSOLES)
00041         {
00042             explain_buffer_einval_out_of_range(sb, "data", 1, MAX_NR_CONSOLES);
00043             break;
00044         }
00045         goto generic;
00046 
00047     case EPERM:
00048         if (!explain_capability_sys_tty_config())
00049         {
00050             explain_buffer_eperm_sys_tty_config(sb, "ioctl VT_ACTIVATE");
00051             break;
00052         }
00053         goto generic;
00054 
00055     default:
00056         generic:
00057         explain_iocontrol_generic_print_explanation
00058         (
00059             p,
00060             sb,
00061             errnum,
00062             fildes,
00063             request,
00064             data
00065         );
00066         break;
00067     }
00068 }
00069 
00070 
00071 const explain_iocontrol_t explain_iocontrol_vt_activate =
00072 {
00073     "VT_ACTIVATE", /* name */
00074     VT_ACTIVATE, /* value */
00075     0, /* disambiguate */
00076     0, /* print_name */
00077     explain_iocontrol_generic_print_data_long, /* print_data */
00078     print_explanation,
00079     0, /* print_data_returned */
00080     NOT_A_POINTER, /* data_size */
00081     "intptr_t", /* data_type */
00082     0, /* flags */
00083     __FILE__,
00084     __LINE__,
00085 };
00086 
00087 #else /* ndef VT_ACTIVATE */
00088 
00089 const explain_iocontrol_t explain_iocontrol_vt_activate =
00090 {
00091     0, /* name */
00092     0, /* value */
00093     0, /* disambiguate */
00094     0, /* print_name */
00095     0, /* print_data */
00096     0, /* print_explanation */
00097     0, /* print_data_returned */
00098     0, /* data_size */
00099     0, /* data_type */
00100     0, /* flags */
00101     __FILE__,
00102     __LINE__,
00103 };
00104 
00105 #endif /* VT_ACTIVATE */
00106 
00107 
00108 /* vim: set ts=8 sw=4 et : */