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#include "env.h"
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#include "env.h"
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#include "helpers.h"
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#include "helpers.h"
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#include "rmodinit.h"
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#include "rmodinit.h"
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#include "sayonara.h"
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#include "sayonara.h"
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#define BUFFER_SIZE 2048 /* make sure this is not bigger than the static buffer in command.c */
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struct cmd_funcparam {
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struct cmd_funcparam {
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int argc; /* number of arguments */
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int argc; /* number of arguments */
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const char *argv[256]; /* pointers to each argument */
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const char *argv[128]; /* pointers to each argument */
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char argvbuf[256]; /* buffer that hold data pointed out by argv[] */
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unsigned short env_seg; /* segment of environment block */
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unsigned short env_seg; /* segment of environment block */
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struct rmod_props far *rmod; /* rmod settings */
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struct rmod_props far *rmod; /* rmod settings */
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unsigned short argoffset; /* offset of cmdline where first argument starts */
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unsigned short argoffset; /* offset of cmdline where first argument starts */
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const char *cmdline; /* original cmdline (terminated by a NULL) */
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const char *cmdline; /* original cmdline (terminated by a NULL) */
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unsigned short BUFFERSZ; /* avail space in BUFFER */
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char BUFFER[BUFFER_SIZE]; /* a buffer for whatever is needed */
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char BUFFER[1]; /* a buffer for whatever is needed (must be last) */
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};
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};
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/* scans argv for the presence of a "/?" parameter. returns 1 if found, 0 otherwise */
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/* scans argv for the presence of a "/?" parameter. returns 1 if found, 0 otherwise */
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static int cmd_ishlp(const struct cmd_funcparam *p) {
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static int cmd_ishlp(const struct cmd_funcparam *p) {
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int i;
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int i;
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}
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}
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/* explodes a command into an array of arguments where last arg is NULL
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/* explodes a command into an array of arguments where last arg is NULL
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* returns number of args */
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* returns number of args */
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unsigned short cmd_explode(char *buff, const char far *s, char const **argvlist) {
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static unsigned short cmd_explode(char *buff, const char far *s, char const **argvlist) {
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int si = 0, argc = 0, i = 0;
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int si = 0, argc = 0, i = 0;
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for (;;) {
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for (;;) {
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/* skip to next non-space character */
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/* skip to next non-space character */
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while (s[si] == ' ') si++;
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while (s[si] == ' ') si++;
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/* end of string? */
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/* end of string? */
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argvlist[argc] = NULL;
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argvlist[argc] = NULL;
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return(argc);
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return(argc);
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}
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}
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int cmd_process(struct rmod_props far *rmod, unsigned short env_seg, const char *cmdline, char *BUFFER) {
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int cmd_process(struct rmod_props far *rmod, unsigned short env_seg, const char *cmdline, void *BUFFER, unsigned short BUFFERSZ) {
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const struct CMD_ID *cmdptr;
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const struct CMD_ID *cmdptr;
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unsigned short argoffset;
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unsigned short argoffset;
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struct cmd_funcparam *p = (void *)BUFFER;
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struct cmd_funcparam *p = (void *)BUFFER;
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p->BUFFERSZ = BUFFERSZ - sizeof(*p);
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/* special case: is this a drive change? (like "E:") */
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/* special case: is this a drive change? (like "E:") */
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if ((cmdline[0] != 0) && (cmdline[1] == ':') && ((cmdline[2] == ' ') || (cmdline[2] == 0))) {
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if ((cmdline[0] != 0) && (cmdline[1] == ':') && ((cmdline[2] == ' ') || (cmdline[2] == 0))) {
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if (((cmdline[0] >= 'a') && (cmdline[0] <= 'z')) || ((cmdline[0] >= 'A') && (cmdline[0] <= 'Z'))) {
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if (((cmdline[0] >= 'a') && (cmdline[0] <= 'z')) || ((cmdline[0] >= 'A') && (cmdline[0] <= 'Z'))) {
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unsigned char drive = cmdline[0];
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unsigned char drive = cmdline[0];
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if (cmdptr == NULL) return(-2); /* command is not recognized as internal */
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if (cmdptr == NULL) return(-2); /* command is not recognized as internal */
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/* printf("recognized internal command: '%s', tail of command at offset %u\r\n", cmdptr->cmd, argoffset); */
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/* printf("recognized internal command: '%s', tail of command at offset %u\r\n", cmdptr->cmd, argoffset); */
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/* prepare function parameters and feed it to the cmd handling function */
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/* prepare function parameters and feed it to the cmd handling function */
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p->argc = cmd_explode(BUFFER + sizeof(*p), cmdline + argoffset, p->argv);
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p->argc = cmd_explode(p->argvbuf, cmdline + argoffset, p->argv);
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p->env_seg = env_seg;
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p->env_seg = env_seg;
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p->rmod = rmod;
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p->rmod = rmod;
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p->argoffset = argoffset;
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p->argoffset = argoffset;
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p->cmdline = cmdline;
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p->cmdline = cmdline;
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