1 /* $NetBSD: slave.c,v 1.6 2011/09/15 11:46:19 blymn Exp $ */
4 * Copyright 2009 Brett Lymn <blymn@NetBSD.org>
8 * This code has been donated to The NetBSD Foundation by the Author.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. The name of the author may not be used to endorse or promote products
16 * derived from this software withough specific prior written permission
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <sys/ioctl.h>
46 static const char *returns_enum_names[] = {
47 "unused", "numeric", "string", "byte", "ERR", "OK", "NULL", "not NULL",
53 * Read the command pipe for the function to execute, gather the args
54 * and then process the command.
57 process_commands(WINDOW *mainscr)
59 int len, maxlen, argslen, i, ret, type;
60 char *cmdbuf, *tmpbuf, **args, **tmpargs;
63 if ((cmdbuf = malloc(maxlen)) == NULL)
64 err(1, "slave cmdbuf malloc failed");
67 if (read(cmdpipe[READ_PIPE], &type, sizeof(int)) < 0)
68 err(1, "slave command type read failed");
70 if (type != ret_string)
71 errx(1, "Unexpected type for command, got %d", type);
73 if (read(cmdpipe[READ_PIPE], &len, sizeof(int)) < 0)
74 err(1, "slave command len read failed");
76 if ((len + 1) > maxlen) {
78 if ((tmpbuf = realloc(cmdbuf, maxlen)) == NULL)
79 err(1, "slave cmdbuf realloc to %d "
80 "bytes failed", maxlen);
84 if (read(cmdpipe[READ_PIPE], cmdbuf, len) < 0)
85 err(1, "slave command read failed");
91 if (read(cmdpipe[READ_PIPE], &type, sizeof(int)) < 0)
92 err(1, "slave arg type read failed");
94 if (read(cmdpipe[READ_PIPE], &len, sizeof(int)) < 0)
95 err(1, "slave arg len read failed");
98 tmpargs = realloc(args,
99 (argslen + 1) * sizeof(char *));
101 err(1, "slave realloc of args array "
105 if (type != ret_null) {
106 args[argslen] = malloc(len + 1);
108 if (args[argslen] == NULL)
109 err(1, "slave alloc of %d bytes"
110 " for args failed", len);
114 if (type == ret_null)
115 args[argslen] = NULL;
117 args[argslen][0] = '\0';
119 read(cmdpipe[READ_PIPE], args[argslen],
121 if (type != ret_byte)
122 args[argslen][len] = '\0';
125 if (strcmp(args[argslen],
127 ret = asprintf(&tmpbuf,
132 "asprintf of stdscr failed");
134 args[argslen] = tmpbuf;
144 command_execute(cmdbuf, argslen, args);
147 for (i = 0; i < argslen; i++)
156 main(int argc, char *argv[])
161 fprintf(stderr, "Usage: %s <cmdin> <cmdout> <slvin> slvout>\n",
165 sscanf(argv[1], "%d", &cmdpipe[0]);
166 sscanf(argv[2], "%d", &cmdpipe[1]);
167 sscanf(argv[3], "%d", &slvpipe[0]);
168 sscanf(argv[4], "%d", &slvpipe[1]);
172 err(1, "initscr failed");
174 process_commands(mainscr);