freebsd-skq/usr.sbin/ngctl/main.c
archie 869bd7a8e7 If we get an EPROTONOSUPP error when trying to create the netgraph socket
node, it's most likely because the "ng_socket.ko" KLD is not loaded yet.
So make an attempt to load it before giving up.
1999-10-27 22:17:18 +00:00

383 lines
8.1 KiB
C

/*
* main.c
*
* Copyright (c) 1996-1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "ngctl.h"
#define PROMPT "+ "
#define MAX_ARGS 512
#define WHITESPACE " \t\r\n\v\f"
#define NG_SOCKET_KLD "ng_socket.ko"
/* Internal functions */
static int ReadFile(FILE *fp);
static int DoParseCommand(char *line);
static int DoCommand(int ac, char **av);
static int DoInteractive(void);
static const struct ngcmd *FindCommand(const char *string);
static void Usage(const char *msg);
static int ReadCmd(int ac, char **av);
static int HelpCmd(int ac, char **av);
static int QuitCmd(int ac, char **av);
/* List of commands */
static const struct ngcmd *const cmds[] = {
&connect_cmd,
&debug_cmd,
&help_cmd,
&list_cmd,
&mkpeer_cmd,
&name_cmd,
&read_cmd,
&rmhook_cmd,
&show_cmd,
&shutdown_cmd,
&status_cmd,
&types_cmd,
&quit_cmd,
NULL
};
/* Commands defined in this file */
const struct ngcmd read_cmd = {
ReadCmd,
"read <filename>",
"Read and execute commands from a file",
NULL
};
const struct ngcmd help_cmd = {
HelpCmd,
"help [command]",
"Show command summary or get more help on a specific command",
NULL
};
const struct ngcmd quit_cmd = {
QuitCmd,
"quit",
"Exit program",
NULL
};
/* Our control and data sockets */
int csock, dsock;
/*
* main()
*/
int
main(int ac, char *av[])
{
char name[NG_NODELEN + 1];
int interactive = isatty(0) && isatty(1);
FILE *fp = NULL;
int ch, rtn = 0;
/* Set default node name */
snprintf(name, sizeof(name), "ngctl%d", getpid());
/* Parse command line */
while ((ch = getopt(ac, av, "df:n:")) != EOF) {
switch (ch) {
case 'd':
NgSetDebug(NgSetDebug(-1) + 1);
break;
case 'f':
if (strcmp(optarg, "-") == 0)
fp = stdin;
else if ((fp = fopen(optarg, "r")) == NULL)
err(EX_NOINPUT, "%s", optarg);
break;
case 'n':
snprintf(name, sizeof(name), "%s", optarg);
break;
case '?':
default:
Usage((char *)NULL);
break;
}
}
ac -= optind;
av += optind;
/* Create a new socket node */
if (NgMkSockNode(name, &csock, &dsock) < 0) {
if (errno == EPROTONOSUPPORT) {
if (kldload(NG_SOCKET_KLD) < 0)
err(EX_OSERR, "can't load %s", NG_SOCKET_KLD);
if (NgMkSockNode(name, &csock, &dsock) >= 0)
goto gotNode;
}
err(EX_OSERR, "can't create node");
}
gotNode:
/* Do commands as requested */
if (ac == 0) {
if (fp != NULL) {
rtn = ReadFile(fp);
} else if (interactive) {
rtn = DoInteractive();
} else
Usage("no command specified");
} else {
rtn = DoCommand(ac, av);
}
/* Convert command return code into system exit code */
switch (rtn) {
case CMDRTN_OK:
case CMDRTN_QUIT:
rtn = 0;
break;
case CMDRTN_USAGE:
rtn = EX_USAGE;
break;
case CMDRTN_ERROR:
rtn = EX_OSERR;
break;
}
return(rtn);
}
/*
* Process commands from a file
*/
static int
ReadFile(FILE *fp)
{
char line[LINE_MAX];
int num, rtn;
for (num = 1; fgets(line, sizeof(line), fp) != NULL; num++) {
if (*line == '#')
continue;
if ((rtn = DoParseCommand(line)) != 0) {
warnx("line %d: error in file", num);
return(rtn);
}
}
return(CMDRTN_OK);
}
/*
* Interactive mode
*/
static int
DoInteractive(void)
{
char buf[LINE_MAX];
/* Read commands from stdin */
(*help_cmd.func)(0, NULL);
do {
printf("%s", PROMPT);
if (fgets(buf, sizeof(buf), stdin) == NULL)
break;
fflush(stdout);
} while (DoParseCommand(buf) != CMDRTN_QUIT);
return(CMDRTN_QUIT);
}
/*
* Parse a command line and execute the command
*/
static int
DoParseCommand(char *line)
{
char *av[MAX_ARGS];
int ac;
/* Parse line */
for (ac = 0, av[0] = strtok(line, WHITESPACE);
ac < MAX_ARGS - 1 && av[ac];
av[++ac] = strtok(NULL, WHITESPACE));
/* Do command */
return(DoCommand(ac, av));
}
/*
* Execute the command
*/
static int
DoCommand(int ac, char **av)
{
const struct ngcmd *cmd;
int rtn;
if (ac == 0 || *av[0] == 0)
return(CMDRTN_OK);
if ((cmd = FindCommand(av[0])) == NULL)
return(CMDRTN_ERROR);
if ((rtn = (*cmd->func)(ac, av)) == CMDRTN_USAGE)
warnx("usage: %s", cmd->cmd);
return(rtn);
}
/*
* Find a command
*/
static const struct ngcmd *
FindCommand(const char *string)
{
const struct ngcmd *cmd;
int k, len, found;
if (strcmp(string, "?") == 0)
string = "help";
for (k = 0, found = -1; cmds[k]; k++) {
cmd = cmds[k];
len = strcspn(cmd->cmd, WHITESPACE);
if (len > strlen(string))
len = strlen(string);
if (!strncasecmp(string, cmd->cmd, len)) {
if (found != -1) {
warnx("\"%s\": ambiguous command", string);
return(NULL);
}
found = k;
}
}
if (found == -1) {
warnx("\"%s\": unknown command", string);
return(NULL);
}
return(cmds[found]);
}
/*
* ReadCmd()
*/
static int
ReadCmd(int ac, char **av)
{
FILE *fp;
int rtn;
/* Open file */
switch (ac) {
case 2:
if ((fp = fopen(av[1], "r")) == NULL)
warn("%s", av[1]);
return(CMDRTN_ERROR);
default:
return(CMDRTN_USAGE);
}
/* Process it */
rtn = ReadFile(fp);
fclose(fp);
return(rtn);
}
/*
* HelpCmd()
*/
static int
HelpCmd(int ac, char **av)
{
const struct ngcmd *cmd;
int k;
switch (ac) {
case 0:
case 1:
/* Show all commands */
printf("Available commands:\n");
for (k = 0; cmds[k] != NULL; k++) {
char *s, buf[100];
cmd = cmds[k];
snprintf(buf, sizeof(buf), "%s", cmd->cmd);
for (s = buf; *s != '\0' && !isspace(*s); s++);
*s = '\0';
printf(" %-10s %s\n", buf, cmd->desc);
}
return(CMDRTN_OK);
default:
/* Show help on a specific command */
if ((cmd = FindCommand(av[1])) != NULL) {
printf("Usage: %s\n", cmd->cmd);
printf("Summary: %s\n", cmd->desc);
if (cmd->help != NULL) {
const char *s;
char buf[65];
int tot, len, done;
printf("Description:\n");
for (s = cmd->help; *s != '\0'; s += len) {
while (isspace(*s))
s++;
tot = snprintf(buf,
sizeof(buf), "%s", s);
len = strlen(buf);
done = len == tot;
if (!done) {
while (len > 0
&& !isspace(buf[len-1]))
buf[--len] = '\0';
}
printf(" %s\n", buf);
}
}
}
}
return(CMDRTN_OK);
}
/*
* QuitCmd()
*/
static int
QuitCmd(int ac, char **av)
{
return(CMDRTN_QUIT);
}
/*
* Usage()
*/
static void
Usage(const char *msg)
{
if (msg)
warnx("%s", msg);
errx(EX_USAGE, "usage: ngctl [-d] [-f file] [-n name] [command ...]");
}