smd.c revision dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0 
1#include <stdio.h>
2#include <string.h>
3#include <fcntl.h>
4#include <errno.h>
5
6int smd_main(int argc, char **argv)
7{
8    int fd, len, r, port = 0;
9    char devname[32];
10    argc--;
11    argv++;
12
13    if((argc > 0) && (argv[0][0] == '-')) {
14        port = atoi(argv[0] + 1);
15        argc--;
16        argv++;
17    }
18
19    sprintf(devname,"/dev/smd%d",port);
20    fd = open(devname, O_WRONLY);
21    if(fd < 0) {
22        fprintf(stderr,"failed to open smd0 - %s\n",
23            strerror(errno));
24        return -1;
25    }
26    while(argc > 0) {
27        len = strlen(argv[0]);
28        r = write(fd, argv[0], len);
29        if(r != len) {
30            fprintf(stderr,"failed to write smd0 (%d) %s\n",
31                r, strerror(errno));
32            return -1;
33        }
34        argc--;
35        argv++;
36        write(fd, argc ? " " : "\r", 1);
37    }
38    close(fd);
39    return 0;
40}
41