mirror of https://github.com/0intro/wmii
76 lines
1.4 KiB
C
76 lines
1.4 KiB
C
/*
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* (C)opyright MMIV-MMV Anselm R. Garbe <garbeam at gmail dot com>
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* See LICENSE file for license details.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include "ixp.h"
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#include <cext.h>
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u32 ixp_send_message(int fd, void *msg, u32 msize, char **errstr)
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{
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u32 num = 0;
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int r;
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/* send message */
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while (num < msize) {
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r = write(fd, msg + num, msize - num);
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if (r == -1 && errno == EINTR)
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continue;
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if (r < 1) {
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*errstr = "cannot send message";
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return 0;
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}
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num += r;
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}
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return num;
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}
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static u32 ixp_recv_data(int fd, void *msg, u32 msize, char **errstr)
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{
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u32 num = 0;
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int r = 0;
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/* receive data */
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while (num < msize) {
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r = read(fd, msg + num, msize - num);
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if (r == -1 && errno == EINTR)
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continue;
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if (r < 1) {
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*errstr = "cannot receive data";
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return 0;
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}
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num += r;
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}
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return num;
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}
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u32 ixp_recv_message(int fd, void *msg, u32 msglen, char **errstr)
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{
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u32 msize;
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/* receive header */
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if (ixp_recv_data(fd, msg, sizeof(u32), errstr) != sizeof(u32))
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return 0;
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ixp_dec_u32(msg, &msize);
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if (msize > msglen) {
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*errstr = "message size exceeds buffer size";
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return 0;
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}
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/* receive message */
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if (ixp_recv_data(fd, msg + sizeof(u32), msize - sizeof(u32), errstr)
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!= msize - sizeof(u32))
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return 0;
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return msize;
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}
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