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luishernandez authoredluishernandez authored
dsh_cli.c 6.89 KiB
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dshlib.h"
void printDragon() {
const unsigned char ascii_art[] =
" @%%%% \n"
" %%%%%% \n"
" %%%%%% \n"
" % %%%%%%% @ \n"
" %%%%%%%%%% %%%%%%% \n"
" %%%%%%% %%%%@ %%%%%%%%%%%%@ %%%%%% @%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%% %%%%%%%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%% %%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%@ @%%%%%%%%%%%%%%%%%% %% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%@%%%%%%@ \n"
" %%%%%%%%@ %%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%% %% \n"
" %%%%%%%%%%%%% %%@%%%%%%%%%%%% %%%%%%%%%%% %%%%%%%%%%%% @% \n"
" %%%%%%%%%% %%% %%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%% \n"
" %%%%%%%%% % %%%%%%%%%%%%% %%%%%%%%%%%%@%%%%%%%%%%% \n"
"%%%%%%%%%@ % %%%%%%%%%%%%% @%%%%%%%%%%%%%%%%%%%%%%%%% \n"
"%%%%%%%%@ %%@%%%%%%%%%%%% @%%%%%%%%%%%%%%%%%%%%%%%%%%%% \n"
"%%%%%%%@ %%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \n"
"%%%%%%%%%% %%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%% \n"
"%%%%%%%%%@ @%%%%%%%%%%%%%% %%%%%%%%%%%%@ %%%% %%%%%%%%%%%%%%%%% %%%%%%%%\n"
"%%%%%%%%%% %%%%%%%%%%%%%%%%% %%%%%%%%%%%%% %%%%%%%%%%%%%%%%%% %%%%%%%%%\n"
"%%%%%%%%%@%%@ %%%%%%%%%%%%%%%%@ %%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%% %%\n"
" %%%%%%%%%% % %%%%%%%%%%%%%%@ %%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%% %%\n"
" %%%%%%%%%%%% @ %%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% \n"
" %%%%%%%%%%%%% %% % %@ %%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% \n"
" %%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%% @%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% \n"
" @%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%% %%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%% @%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%% @%@% @%%%%%%%%%%%%%%%%%% %%% \n"
" %%%%%%%%%%%%%%% %%%%%%%%%% %%%%%%%%%%%%%%% % \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%% \n"
" %%%%%%%%%%%%%%%%%%%%%%%%%% %%%% %%% %%%%%%%%%% %%%@ \n"
" %%%%%%%%%%%%%%%%%%% %%%%%% %% %%%%%%%%%%%%%@ \n"
" %%%%%%%@ \n";
fwrite(ascii_art, sizeof(unsigned char), sizeof(ascii_art) - 1, stdout);
}
/*
* Implement your main function by building a loop that prompts the
* user for input. Use the SH_PROMPT constant from dshlib.h and then
* use fgets to accept user input. Since we want fgets to also handle
* end of file so we can run this headless for testing we need to check
* the return code of fgets. I have provided an example below of how
* to do this assuming you are storing user input inside of the cmd_buff
* variable.
*
* while(1){
* printf("%s", SH_PROMPT);
* if (fgets(cmd_buff, ARG_MAX, stdin) == NULL){
* printf("\n");
* break;
* }
* //remove the trailing \n from cmd_buff
* cmd_buff[strcspn(cmd_buff,"\n")] = '\0';
*
* //IMPLEMENT THE REST OF THE REQUIREMENTS
* }
* * Also, use the constants in the dshlib.h in this code.
* SH_CMD_MAX maximum buffer size for user input
* EXIT_CMD constant that terminates the dsh program
* SH_PROMPT the shell prompt
* OK the command was parsed properly
* WARN_NO_CMDS the user command was empty
* ERR_TOO_MANY_COMMANDS too many pipes used
*
* Expected output:
*
* CMD_OK_HEADER if the command parses properly. You will
* follow this by the command details
*
* CMD_WARN_NO_CMD if the user entered a blank command
* CMD_ERR_PIPE_LIMIT if the user entered too many commands using
* the pipe feature, e.g., cmd1 | cmd2 | ... |
*
* See the provided test cases for output expectations.
*/
int main()
{
char *cmd_buff = malloc(ARG_MAX * sizeof(char));
int rc = OK;
command_list_t *clist = malloc(sizeof(command_list_t));
clist->num = 0;
while (1)
{
printf("%s", SH_PROMPT);
if (fgets(cmd_buff, ARG_MAX, stdin) == NULL)
{
printf("\n");
break;
}
// remove the trailing \n from cmd_buff
cmd_buff[strcspn(cmd_buff, "\n")] = '\0';
// IMPLEMENT THE REST OF THE REQUIREMENTS
if (strcmp(cmd_buff, EXIT_CMD) == 0) {
exit(rc);
}
if (strcmp(cmd_buff, "dragon") == 0) {
printDragon();
continue;
}
if (strcmp(cmd_buff, "\0") == 0) {
rc = WARN_NO_CMDS;
printf(CMD_WARN_NO_CMD);
continue;
}
rc = build_cmd_list(cmd_buff, clist);
if (rc == ERR_TOO_MANY_COMMANDS) {
printf(CMD_ERR_PIPE_LIMIT, CMD_MAX);
continue;
}
printf(CMD_OK_HEADER, clist->num);
for (int i = 0; i < clist->num; i++) {
if (strlen(clist->commands[i].args) > 0) {
printf("<%d> %s [%s]\n", i + 1, clist->commands[i].exe, clist->commands[i].args);
} else {
printf("<%d> %s\n", i + 1, clist->commands[i].exe);
}
}
}
free(cmd_buff);
free(clist);
return rc;
}