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main.c
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main.c
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#include <stdio.h>
#include <malloc.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <stdlib.h>
struct list{
struct words* words;
struct list* next;
int number;
char** command;
};
struct word{
char* thatchar;
int buff;
int len;
};
struct words{
struct word** word;
int buff;
int len;
};
void addchar(struct word* thatword,int b,int* endofword){
if (b == -1) {
puts("\n");
exit(0);
}else{
if ((*thatword).len < (*thatword).buff) {
(*thatword).thatchar[(*thatword).len] = (char) b;
(*thatword).len++;
} else {
char *helpingword = (char *) malloc((*thatword).buff * sizeof(char));
for (int i = 0; i < (*thatword).buff; i++) {
helpingword[i] = (*thatword).thatchar[i];
}
free((*thatword).thatchar);
(*thatword).buff = (*thatword).buff * 2;
(*thatword).thatchar = (char *) malloc((*thatword).buff * sizeof(char));
for (int i = 0; i < ((*thatword).buff) / 2; i++) {
(*thatword).thatchar[i] = helpingword[i];
}
free(helpingword);
(*thatword).thatchar[(*thatword).len] = (char) b;
(*thatword).len++;
}
}
}
struct word* inword(int* endofword) {
struct word *thatword = (struct word *) malloc(sizeof(struct word));
(*thatword).buff = 8;
(*thatword).thatchar = (char *) malloc((*thatword).buff * sizeof(char));
(*thatword).len = 0;
int b = getchar();
while (b == ' ') {
b = getchar();
}
if (b == '\n') {
*endofword = 1;
free(thatword->thatchar);
free(thatword);
thatword = 0;
} else {
if (b == '|') {
*endofword = -1;
free(thatword->thatchar);
free(thatword);
thatword = 0;
} else {
if (b=='<'){
*endofword = 3;
free(thatword->thatchar);
free(thatword);
thatword = 0;
} else {
if (b == '>') {
*endofword = 4;
free(thatword->thatchar);
free(thatword);
thatword = 0;
}else{
if (b == '&'){
*endofword = 2;
free(thatword->thatchar);
free(thatword);
thatword = 0;
}else {
while (b != ' ' && b != '\n' && b != '|' && b != '&' && b != '<' && b != '>') {
if (b == '\\') {
b = getchar();
if (b != '\n') {
addchar(thatword, '\\', endofword);
addchar(thatword, b, endofword);
}
b = getchar();
} else {
if (b == '\'') {
b = getchar();
while (b != '\'') {
addchar(thatword, b, endofword);
b = getchar();
}
b = getchar();
} else {
if (b == '\"') {
b = getchar();
while (b != '\"') {
if (b == '\\') {
b = getchar();
if (b != '\"') {
addchar(thatword, '\\', endofword);
addchar(thatword, b, endofword);
} else {
addchar(thatword, b, endofword);
}
} else {
addchar(thatword, b, endofword);
}
b = getchar();
}
b = getchar();
} else {
addchar(thatword, b, endofword);
b = getchar();
}
}
}
}
if (b == '\n') {
*endofword = 1;
} else {
if (b == '|') {
*endofword = -1;
} else {
if (b == '&') {
*endofword = 2;
} else {
if (b == '<') {
*endofword = 3;
} else {
if (b == '>') {
*endofword = 4;
}
}
}
}
}
if (thatword != 0) {
(*thatword).thatchar[(*thatword).len] = 0;
}
}
}
}
}
}
return thatword;
}
struct word* inwordwithfirstsymbol(int* endofword,int b) {
struct word *thatword = (struct word *) malloc(sizeof(struct word));
(*thatword).buff = 8;
(*thatword).thatchar = (char *) malloc((*thatword).buff * sizeof(char));
(*thatword).len = 0;
while (b == ' ') {
b = getchar();
}
if (b == '\n') {
*endofword = 1;
free(thatword->thatchar);
free(thatword);
thatword = 0;
} else {
if (b == '|') {
*endofword = -1;
free(thatword->thatchar);
free(thatword);
thatword = 0;
} else {
if (b=='<'){
*endofword = 3;
free(thatword->thatchar);
free(thatword);
thatword = 0;
} else {
if (b == '>') {
*endofword = 4;
free(thatword->thatchar);
free(thatword);
thatword = 0;
}else{
if (b == '&'){
*endofword = 2;
free(thatword->thatchar);
free(thatword);
thatword = 0;
}else {
while (b != ' ' && b != '\n' && b != '|' && b != '&' && b != '<' && b != '>') {
if (b == '\\') {
b = getchar();
if (b != '\n') {
addchar(thatword, '\\', endofword);
addchar(thatword, b, endofword);
}
b = getchar();
} else {
if (b == '\'') {
b = getchar();
while (b != '\'') {
addchar(thatword, b, endofword);
b = getchar();
}
b = getchar();
} else {
if (b == '\"') {
b = getchar();
while (b != '\"') {
if (b == '\\') {
b = getchar();
if (b != '\"') {
addchar(thatword, '\\', endofword);
addchar(thatword, b, endofword);
} else {
addchar(thatword, b, endofword);
}
} else {
addchar(thatword, b, endofword);
}
b = getchar();
}
b = getchar();
} else {
addchar(thatword, b, endofword);
b = getchar();
}
}
}
}
if (b == '\n') {
*endofword = 1;
} else {
if (b == '|') {
*endofword = -1;
} else {
if (b == '&') {
*endofword = 2;
} else {
if (b == '<') {
*endofword = 3;
} else {
if (b == '>') {
*endofword = 4;
}
}
}
}
}
if (thatword != 0) {
(*thatword).thatchar[(*thatword).len] = 0;
}
}
}
}
}
}
return thatword;
}
struct words* inwords(int* endofwords,struct word** inputfile,struct word** outputfile,int* whathaveido){
struct words* thatwords = (struct words*)malloc(sizeof(struct word));
thatwords->len = 0;
thatwords->buff = 8;
(*thatwords).word=(struct word**) malloc((*thatwords).buff * sizeof(struct word*));
if (*endofwords != 2) {
*endofwords = 0;
}
while(*endofwords == 0 || *endofwords == 4 || *endofwords == 3) {
if (*endofwords == 3){
*inputfile = inword(endofwords);
if (*endofwords == 3){
*endofwords = 0;
}
}else{
if (*endofwords == 4){
int q = getchar();
if (q == '>'){
*outputfile = inword(endofwords);
*whathaveido = 1;
}else{
*outputfile = inwordwithfirstsymbol(endofwords,q);
*whathaveido = -1;
}
if (*endofwords == 4){
*endofwords = 0;
}
}else {
if ((*thatwords).len < (*thatwords).buff) {
(*thatwords).word[(*thatwords).len] = inword(endofwords);
(*thatwords).len++;
} else {
struct word **helpingwords = (struct word **) malloc((*thatwords).buff * sizeof(struct word *));
for (int i = 0; i < (*thatwords).buff; i++) {
helpingwords[i] = (*thatwords).word[i];
}
free((*thatwords).word);
(*thatwords).buff = (*thatwords).buff * 2;
(*thatwords).word = (struct word **) malloc((*thatwords).buff * sizeof(struct word *));
for (int i = 0; i < ((*thatwords).buff) / 2; i++) {
(*thatwords).word[i] = helpingwords[i];
}
free(helpingwords);
}
}
}
}
while (thatwords->word[thatwords->len-1] == 0){
thatwords->len--;
}
return thatwords;
}
struct list* inlist(int* endoflist,struct word** inputfile,struct word** outputfile,int* whathaveido){
struct list* qq = (struct list*)malloc(sizeof(struct list));
qq->words = inwords(endoflist,inputfile,outputfile,whathaveido);
struct list* qq1 = qq;
qq1->next = 0;
while (*endoflist == -1){
qq1->next = (struct list*)malloc(sizeof(struct list));
qq1->next->words = inwords(endoflist,inputfile,outputfile,whathaveido);
qq1->next->next = 0;
qq1=qq1->next;
}
return qq;
}
char** translate(struct words* thatwords){
char** command;
command = (char **) malloc((thatwords->len +1)* sizeof(char*));
for (int i = 0; i < thatwords->len; i++) {
command[i] = (thatwords->word)[i]->thatchar;
}
command[thatwords->len] = 0;
return command;
}
void outcommand(char** command,struct word** inputfile,struct word** outputfile,int* whathaveido, int number , int nnn, int** pipes){
if (fork() == 0) {
int inf;
int outf;
for (int i=0;i < nnn-1;i++) {
if (i != number - 2 && i != number - 1) {
close(pipes[i][0]);
close(pipes[i][1]);
}
if (i == number - 2) {
close(pipes[i][1]);
dup2(pipes[i][0], STDIN_FILENO);
}
if (i == number - 1) {
close(pipes[i][0]);
dup2(pipes[i][1], STDOUT_FILENO);
}
}
if (number==nnn){
if (*outputfile != 0) {
if (*whathaveido==-1){
outf = open((*outputfile)->thatchar,O_WRONLY | O_TRUNC | O_CREAT, 0666);
dup2(outf,STDOUT_FILENO);
}else{
outf = open((*outputfile)->thatchar,O_WRONLY | O_APPEND | O_CREAT, 0666);
dup2(outf,STDOUT_FILENO);
}
}
}
if (number == 1){
if (*inputfile != 0){
inf = open((*inputfile)->thatchar,O_RDONLY,0666);
dup2(inf,STDIN_FILENO);
}
}
execvp(command[0], command);
close(pipes[number-1][0]);
close(pipes[number][1]);
exit(0);
}
}
void outcommandwithfon(char** command,struct word** inputfile,struct word** outputfile,int* whathaveido, int number , int nnn, int** pipes){
int qqq = fork();
int status;
if (qqq == 0) {
int inf;
int outf;
for (int i=0;i < nnn-1;i++){
if (i != number-2 && i!=number-1){
close(pipes[i][0]);
close(pipes[i][1]);
}
if (i == number-2){
close(pipes[i][1]);
dup2(pipes[i][0],STDIN_FILENO);
}
if (i == number-1){
close(pipes[i][0]);
dup2(pipes[i][1],STDOUT_FILENO);
}
}
if (number==nnn){
if (*outputfile != 0) {
if (*whathaveido==-1){
outf = open((*outputfile)->thatchar,O_WRONLY | O_TRUNC | O_CREAT, 0666);
dup2(outf,STDOUT_FILENO);
}else{
outf = open((*outputfile)->thatchar,O_WRONLY | O_APPEND | O_CREAT, 0666);
dup2(outf,STDOUT_FILENO);
}
}
}
if (number == 1){
if (*inputfile != 0){
inf = open((*inputfile)->thatchar,O_RDONLY,0666);
dup2(inf,STDIN_FILENO);
}
}
execvp(command[0], command);
close(pipes[number-1][0]);
close(pipes[number][1]);
exit(0);
}else{
waitpid(qqq,&status,WNOHANG);
}
}
void outlist(struct list* commands,struct word** inputfile,struct word** outputfile,int* whathaveido, int nnn,int** pipes){
if (commands != 0){
outcommand(commands->command,inputfile,outputfile,whathaveido,commands->number,nnn,pipes);
outlist(commands->next,inputfile,outputfile,whathaveido,nnn,pipes);
for(int i = 0; i< nnn-1;i++){
close(pipes[i][0]);
close(pipes[i][1]);
}
while(wait(0)!=-1){};
}
}
void outlist1(struct list* commands,struct word** inputfile,struct word** outputfile,int* whathaveido, int nnn,int** pipes){
if (fork()){
wait(0);
}else{
outlist(commands,inputfile,outputfile,whathaveido,nnn,pipes);
}
}
void outlistwithfon(struct list* commands,struct word** inputfile,struct word** outputfile,int* whathaveido, int nnn,int** pipes){
if (commands != 0){
outcommandwithfon(commands->command,inputfile,outputfile,whathaveido,commands->number,nnn,pipes);
outlistwithfon(commands->next,inputfile,outputfile,whathaveido,nnn,pipes);
for(int i = 0; i< nnn-1;i++) {
close(pipes[i][0]);
close(pipes[i][1]);
}
}
}
void dellist(struct list* commands){
if (commands!=0){
dellist(commands->next);
for(int i = 0; i < commands->words->len ; i++){
free(commands->words->word[i]->thatchar);
free(commands->words->word[i]);
}
free(commands->words->word);
free(commands->words);
free(commands->command);
free(commands);
}
}
int numeratelist(struct list* commands){
int i = 0;
while (commands!=0){
i++;
commands->number=i;
commands->command=translate(commands->words);
commands=commands->next;
}
return i;
}
int main() {
char way[100];
struct word *outputfile = 0;
int whathaveido = 0;
struct word *inputfile = 0;
int endoflist = -1;
struct word *xmxm;
struct words *thatwords;
struct list *commands;
int nnn;
while(1) {
getcwd(way,100);
printf("%s>>тут пиши команду>>",way);
commands = inlist(&endoflist, &inputfile, &outputfile, &whathaveido);
if (commands->words->len==0){
continue;
}
nnn = numeratelist(commands);
if (commands->command[0][0]=='e' && commands->command[0][1]=='x' && commands->command[0][2]=='i' && commands->command[0][3]=='t' && commands->command[0][4]==0){
break;
}
if (commands->words->word == 0){
continue;
}
if (commands->command[0][0]=='c' && commands->command[0][1]=='d'){
chdir(commands->command[1]);
}else{
int **pipes = (int **) malloc((nnn - 1) * sizeof(int *));
for (int i = 0; i < nnn - 1; i++) {
pipes[i] = (int *) malloc(2 * sizeof(int));
pipe(pipes[i]);
}
if (endoflist == 2) {
xmxm = inword(&endoflist);
if (xmxm != 0) {
printf("Косяк, знак & не в конце файла, исправь\n");
dellist(commands);
} else {
outlistwithfon(commands, &inputfile, &outputfile, &whathaveido, nnn, pipes);
if (inputfile != 0) {
free(inputfile->thatchar);
free(inputfile);
inputfile=0;
}
if (outputfile != 0) {
free(outputfile->thatchar);
free(outputfile);
outputfile=0;
}
}
if (xmxm != 0) {
free(xmxm->thatchar);
free(xmxm);
}
} else {
outlist1(commands, &inputfile, &outputfile, &whathaveido, nnn, pipes);
if (inputfile != 0) {
free(inputfile->thatchar);
free(inputfile);
inputfile=0;
}
if (outputfile != 0) {
free(outputfile->thatchar);
free(outputfile);
outputfile=0;
}
}
for (int i = 0; i < nnn - 1; i++) {
free(pipes[i]);
pipes[i] = 0;
}
if (nnn!=1){
free(pipes);
pipes = 0;
}
}
dellist(commands);
}
dellist(commands);
return 0;
}