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The Datafile PD-CD 3
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tcpipsrc
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cmdparse
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1995-01-29
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/* Parse command line, set up command arguments Unix-style, and call function.
* Note: argument is modified (delimiters are overwritten with nulls)
* Improved error handling by Brian Boesch of Stanford University
*/
#include <stdio.h>
#include <string.h>
#include "global.h"
#include "cmdparse.h"
#include "misc.h"
#include "var.h"
varlist global_vars = NULL;
void cmdparse_init(void)
{
global_vars = varlist_create(NULL);
var_init_osvars(global_vars, vart_string, "TCPIP$String$*" );
var_init_osvars(global_vars, vart_osvar, "TCPIP$OSVar$*" );
}
int dosetvar(int argc, char **argv)
{
var_create_string(global_vars, argv[1], 0, argv[2]);
return 0;
}
int dosetosvar(int argc, char **argv)
{
var_create_osvar(global_vars, argv[1], 0, argv[2]);
return 0;
}
int doshowvar(int argc, char **argv)
{
char buf[256];
var vp;
if (argc<2)
{
for (vp = global_vars->head; vp!=NULL; vp = vp->link)
{
var_output(vp, buf, 256);
if (vp->type==vart_osvar)
cwprintf(NULL, " %-16s: <%s> = \"%s\"\r\n", vp->name+1, vp->value.string, buf);
else
cwprintf(NULL, " %-16s: \"%s\"\r\n", vp->name+1, buf);
}
}
else
{
if (vp = var_lookup(global_vars, argv[1], 0), vp!=NULL)
{
var_output(vp, buf, 256);
if (vp->type==vart_osvar)
cwprintf(NULL, " %-16s: <%s> = \"%s\"\r\n", vp->name+1, vp->value.string, buf);
else
cwprintf(NULL, " %-16s: \"%s\"\r\n", vp->name+1, buf);
}
else
{
cwprintf(NULL, "Variable not known\r\n");
return 1;
}
}
return 0;
}
/* Call a subcommand based on the first token in an already-parsed line */
int subcmd(struct cmds *cmdtable, int argc, char **argv)
{
int loop, rslt;
/* Strip off first token and pass rest of line to subcommand */
if (argc < 2 || argv[1][0] == '?' || strnicmp(argv[1], "help", strlen(argv[1])) == NULL)
{
if (argc < 1)
{
cwprintf(NULL, "SUBCMD - Don't know what to do?\r\n");
}
else
{
cwprintf(NULL, "\"%s\" - takes at least one argument\r\n",argv[0]);
for (loop = 0; cmdtable[loop].name != NULLCHAR; loop++)
{
cwprintf(NULL, "%20s", cmdtable[loop].name);
if (cmdtable[loop].argc_errmsg != NULLCHAR)
cwprintf(NULL, " - %s\r\n", cmdtable[loop].argc_errmsg);
else
cwprintf(NULL, "\r\n");
}
}
return -1;
}
argc--;
argv++;
for (loop = 0; cmdtable[loop].name != NULLCHAR; loop++)
{
if (strnicmp(argv[0], cmdtable[loop].name, strlen(argv[0])) == 0)
{
if (argc < cmdtable[loop].argcmin)
{
if (cmdtable[loop].argc_errmsg != NULLCHAR)
cwprintf(NULL, "Usage: %s\r\n", cmdtable[loop].argc_errmsg);
return -1;
}
else
{
rslt = (cmdtable[loop].func)(argc, argv); /* Shouldn't call (*func) should we? */
if ((rslt < 0) && (cmdtable[loop].exec_errmsg != NULLCHAR))
cwprintf(NULL, "%s\r\n", cmdtable[loop].exec_errmsg);
return(rslt);
}
}
}
if (cmdtable[loop].argc_errmsg != NULLCHAR)
cwprintf(NULL, "%s\r\n", cmdtable[loop].argc_errmsg);
return -1;
}
extern Terminal *MWin;
int cmdparse(struct cmds *cmdtable, register char *line, Terminal *Window)
{
BOOL qflag;
char *argv[NARG], *cp;
int argc, loop, rslt;
char xcmd[1024];
Terminal *temp;
/* Remove cr/lf */
rip(line);
var_translate(global_vars, line, 0, xcmd, 1024);
line = xcmd;
for (argc = 0; argc < NARG; argc++)
argv[argc] = NULLCHAR;
temp = Window;
/* if (Window == NULL) */
Window = MWin;
for (argc = 0; argc < NARG; )
{
qflag = FALSE;
/* Skip leading white space */
while (*line == ' ' || *line == '\t')
line++;
if (*line == '\0')
break;
/* Check for quoted token */
if (*line == '"')
{
line++; /* Suppress quote */
qflag = TRUE;
}
argv[argc++] = line; /* Beginning of token */
/* Find terminating delimiter */
if (qflag)
{
/* Find quote, it must be present */
if (line = strchr(line,'"'), line == NULLCHAR)
{
return(-1);
}
*line++ = '\0';
}
else
{
/* Find space or tab. If not present,
then we've already found the last
token. */
if (cp = strchr(line,' '), cp == NULLCHAR)
{
if (cp = strchr(line,'\t'), cp == NULLCHAR)
{
break;
}
}
*cp++ = '\0';
line = cp;
}
}
if (argc < 1)
{ /* empty command line */
argc = 1;
argv[0] = "";
}
/* Lines beginning with "#" are comments */
if (argv[0] == NULLCHAR || argv[0][0] == '#')
return 0;
/* Look up command in table; prefix matches are OK */
for (loop = 0; cmdtable[loop].name != NULLCHAR; loop++)
{
if (strncmp(argv[0], cmdtable[loop].name, strlen(argv[0])) == 0)
break;
}
if (cmdtable[loop].name == NULLCHAR)
{
if (cmdtable[loop].argc_errmsg != NULLCHAR)
{
cwprintf(Window, "%s\r\n", cmdtable[loop].argc_errmsg);
}
return -1;
}
else
{
if (argc < cmdtable[loop].argcmin)
{
/* Insufficient arguments */
if (cmdtable[loop].argc_errmsg != NULLCHAR)
cwprintf(Window, "Usage: %s\r\n", cmdtable[loop].argc_errmsg);
return(-1);
}
else
{
rslt = (cmdtable[loop].func)(argc, argv); /* Shouldn't call (*func) should we? */
if ((rslt < 0) && (cmdtable[loop].exec_errmsg != NULLCHAR))
{
cwprintf(Window, "%s\r\n", cmdtable[loop].exec_errmsg);
}
return(rslt);
}
}
}