66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2013 Michael Stapelberg and contributors (see also: LICENSE)
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*
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <err.h>
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#include <errno.h>
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#include <i3/ipc.h>
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#include "libi3.h"
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/*
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* Formats a message (payload) of the given size and type and sends it to i3 via
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* the given socket file descriptor.
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*
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* Returns -1 when write() fails, errno will remain.
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* Returns 0 on success.
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*
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*/
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int ipc_send_message(int sockfd, const uint32_t message_size,
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const uint32_t message_type, const uint8_t *payload) {
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const i3_ipc_header_t header = {
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/* We don’t use I3_IPC_MAGIC because it’s a 0-terminated C string. */
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.magic = { 'i', '3', '-', 'i', 'p', 'c' },
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.size = message_size,
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.type = message_type
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};
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int sent_bytes = 0;
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int n = 0;
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/* This first loop is basically unnecessary. No operating system has
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* buffers which cannot fit 14 bytes into them, so the write() will only be
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* called once. */
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while (sent_bytes < sizeof(i3_ipc_header_t)) {
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if ((n = write(sockfd, ((void*)&header) + sent_bytes, sizeof(i3_ipc_header_t) - sent_bytes)) == -1) {
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if (errno == EAGAIN)
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continue;
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return -1;
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}
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sent_bytes += n;
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}
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sent_bytes = 0;
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while (sent_bytes < message_size) {
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if ((n = write(sockfd, payload + sent_bytes, message_size - sent_bytes)) == -1) {
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if (errno == EAGAIN)
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continue;
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return -1;
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}
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sent_bytes += n;
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}
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return 0;
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}
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