mirror of https://github.com/nirenjan/libx52.git
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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* Saitek X52 Pro MFD & LED driver - Client communication library
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*
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* Copyright (C) 2021 Nirenjan Krishnan (nirenjan@nirenjan.org)
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*
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* SPDX-License-Identifier: GPL-2.0-only WITH Classpath-exception-2.0
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*/
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#include "config.h"
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "x52dcomm-internal.h"
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#include "x52d_const.h"
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const char * x52d_command_sock_path(const char *sock_path)
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{
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if (sock_path == NULL) {
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sock_path = X52D_SOCK_COMMAND;
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}
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return sock_path;
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}
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const char * x52d_notify_sock_path(const char *sock_path)
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{
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if (sock_path == NULL) {
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sock_path = X52D_SOCK_NOTIFY;
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}
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return sock_path;
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}
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static int _setup_sockaddr(struct sockaddr_un *remote, const char *sock_path)
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{
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int len;
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if (remote == NULL) {
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errno = EINVAL;
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return -1;
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}
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len = strlen(sock_path);
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if ((size_t)len >= sizeof(remote->sun_path)) {
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/* Socket path will not fit inside sun_path */
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errno = E2BIG;
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return -1;
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}
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/* Setup the sockaddr structure */
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memset(remote, 0, sizeof(*remote));
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remote->sun_family = AF_UNIX;
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/* We've already verified that sock_path will fit, so we don't need strncpy */
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strcpy(remote->sun_path, sock_path);
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len += sizeof(remote->sun_family);
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return len;
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}
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int x52d_setup_command_sock(const char *sock_path, struct sockaddr_un *remote)
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{
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return _setup_sockaddr(remote, x52d_command_sock_path(sock_path));
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}
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int x52d_setup_notify_sock(const char *sock_path, struct sockaddr_un *remote)
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{
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return _setup_sockaddr(remote, x52d_notify_sock_path(sock_path));
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}
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int x52d_set_socket_nonblocking(int sock_fd)
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{
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int flags;
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/* Mark the socket as non-blocking */
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flags = fcntl(sock_fd, F_GETFL);
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if (flags < 0) {
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goto sock_failure;
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}
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if (fcntl(sock_fd, F_SETFL, flags | O_NONBLOCK) < 0) {
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goto sock_failure;
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}
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return 0;
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sock_failure:
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close(sock_fd);
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return -1;
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}
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void x52d_split_args(int *argc, char **argv, char *buffer, int buflen)
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{
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int i = 0;
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while (i < buflen) {
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if (buffer[i]) {
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argv[*argc] = buffer + i;
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(*argc)++;
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for (; i < buflen && buffer[i]; i++);
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// At this point, buffer[i] = '\0'
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// Skip to the next character.
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i++;
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} else {
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// We should never reach here, unless we have two NULs in a row
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argv[*argc] = buffer + i;
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(*argc)++;
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i++;
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}
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}
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}
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