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gadget-import.c

This is an example of how to import a gadget from file. Common reason of doing this is to create gadget base on schema from other devices or resurect gadget after reboot.

/*
* Copyright (C) 2014 Samsung Electronics
*
* Krzysztof Opasiak <k.opasiak@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <sys/sysmacros.h>
#include <usbg/usbg.h>
int main(int argc, char **argv)
{
usbg_state *s;
int ret = -EINVAL;
int usbg_ret;
FILE *input;
if (argc != 3) {
fprintf(stderr, "Usage: gadget-import gadget_name file_name\n");
return ret;
}
/* Prepare input file */
input = fopen(argv[2], "r");
if (!input) {
fprintf(stderr, "Error on fopen. Error: %s\n", strerror(errno));
goto out1;
}
/* Do gadget exporting */
usbg_ret = usbg_init("/sys/kernel/config", &s);
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error on USB gadget init\n");
fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret),
usbg_strerror(usbg_ret));
goto out2;
}
usbg_ret = usbg_import_gadget(s, input, argv[1], NULL);
if (usbg_ret != USBG_SUCCESS) {
fprintf(stderr, "Error on import gadget\n");
fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret),
usbg_strerror(usbg_ret));
if (usbg_ret == USBG_ERROR_INVALID_FORMAT)
fprintf(stderr, "Line: %d. Error: %s\n",
usbg_get_gadget_import_error_line(s),
usbg_get_gadget_import_error_text(s));
goto out3;
}
ret = 0;
out3:
usbg_cleanup(s);
out2:
fclose(input);
out1:
return ret;
}
usbg_strerror
const char * usbg_strerror(usbg_error e)
Get the short description of error.
Definition usbg_error.c:123
usbg_import_gadget
int usbg_import_gadget(usbg_state *s, FILE *stream, const char *name, usbg_gadget **g)
Imports usb gadget from file.
Definition usbg_schemes_libconfig.c:1805
usbg_init
int usbg_init(const char *configfs_path, usbg_state **state)
Initialize the libusbgx library state.
Definition usbg.c:1091
usbg_cleanup
void usbg_cleanup(usbg_state *s)
Clean up the libusbgx library state.
Definition usbg.c:1136
usbg_get_gadget_import_error_line
int usbg_get_gadget_import_error_line(usbg_state *s)
Get line number where gadget import error occurred.
Definition usbg_schemes_libconfig.c:1889
usbg_get_gadget_import_error_text
const char * usbg_get_gadget_import_error_text(usbg_state *s)
Get text of error which occurred during last gadget import.
Definition usbg_schemes_libconfig.c:1881
usbg_error_name
const char * usbg_error_name(usbg_error e)
Get the error name as a constant string.
Definition usbg_error.c:62
usbg_state
Definition usbg_internal.h:93
usbg.h