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Copy pathnan.c
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279 lines (130 loc) · 2.69 KB
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>
#include <ctype.h>
int main( int argc, char *argv[], char *env[] )
{
pid_t child_pid;
int status;
char command[1001];
char temp[1001];
char history[1001][1001];
char *token;
char *args[10];
int i = 0;
int commandCount = 0;
while (1) {
command[0] = '\0';
printf("[CustomShell] ");
fgets(command, 1000, stdin);
command[strlen(command) - 1] = '\0';
strcpy(temp, command);
token = strtok(command, " ");
int j = 0;
while( token != NULL )
{
args[j] = token;
j++;
token = strtok(NULL, " ");
}
if (strcmp(args[0], "history") == 0) {
int j = 0, k=0;
for (j = 0; j < commandCount; j++)
{
while(i<strlen(history[j])) {
if (history[j][i]==' ') {
for (k=i; k<strlen(history[j]); k++)
history[j][k]=history[j][k+1];
} else break;
}
printf("%d. %s\n", j+1, history[j]);
}
} else if (strcmp(args[0], "exit") == 0) {
return 0;
}
/*else if(strcmp(args[0],"!!") == 0){
int k=0;
token = strtok(history[commandCount-1]," ");
while( token != NULL )
{
args[k] = token;
k++;
token = strtok(NULL, " ");
}
/*arg[k] = NULL;
child_pid = fork();
if(child_pid < 0)
{
perror("Fork Failed: ");
exit(1);
}
else if(child_pid == 0)
{
execvp(arg[0], arg);
perror("Execution Failed: ");
exit(0);
}
else
{
wait(NULL);
}
} /*else if(regcomp(args[0],tofind,REG_EXTENDED)==0){
printf("Helo");
}*/
else if(args[0][0] == '!'){
int k=0;
if(strcmp(args[0],"!!") == 0){
printf("jeree");
token = strtok(history[commandCount-1]," ");
while( token != NULL )
{
args[k] = token;
k++;
token = strtok(NULL, " ");
}
}
if(isdigit(args[0][1])){
printf("digit");
int check = args[0][1] - '0';
token = strtok(history[check-1]," ");
printf("%s",history[check]);
while( token != NULL )
{
args[k] = token;
k++;
token = strtok(NULL, " ");
}
}
}
if (commandCount>=100) {
for(i=0; i<commandCount-1; i++) {
strcpy(history[i], history[i+1]);
}
strcpy(history[i], temp);
} else {
strcpy(history[commandCount], temp);
commandCount++;
}
args[j] = NULL;
child_pid = fork();
if(child_pid < 0)
{
perror("Fork Failed: ");
exit(1);
}
else if(child_pid == 0)
{
execvp(args[0], args);
if(strcmp(args[0], "history") != 0) perror("Execution Failed: ");
exit(0);
}
else
{
wait(NULL);
}
}
return 0;
}