mirror of
https://github.com/0intro/wmii
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79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/*
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* (C)opyright MMIV-MMVI 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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unsigned int
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ixp_send_message(int fd, void *msg, unsigned int msize, char **errstr)
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{
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unsigned int 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 = "broken pipe";
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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 unsigned int
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ixp_recv_data(int fd, void *msg, unsigned int msize, char **errstr)
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{
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unsigned int 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 = "broken pipe";
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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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unsigned int
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ixp_recv_message(int fd, void *msg, unsigned int msglen, char **errstr)
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{
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unsigned int msize;
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/* receive header */
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if(ixp_recv_data(fd, msg, sizeof(unsigned int), errstr) !=
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sizeof(unsigned int))
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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 = "invalid message header";
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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(unsigned int),
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msize - sizeof(unsigned int), errstr)
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!= msize - sizeof(unsigned int))
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return 0;
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return msize;
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}
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