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unknown 2019-02-11 12:27:35 +01:00
commit 6cca3a34f8
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README.md Normal file
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# myshell

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myshell.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include <string.h>
#include <time.h>
void help(){
printf("Krystian Janowicz \n Dostepne polecenia: \n echo [arg] \n pwd \n help \n exit \n ls \n" );
}
void pwd(){
char *path;
path = getenv("PWD");
printf(" %s",path);
printf("\n");
}
void prompt(){
char *user;
char *path;
char hostname[150];
user = getenv( "USER" );
path = getenv("PWD");
memset(hostname, 0, 150);
gethostname(hostname, 150);
printf(user);
printf("@");
printf(hostname, "@");
printf(" %s",path);
printf(" $ ");
}
void echo(char komenda[1024]){
char *sprawdzczy = " ";
int dlugosc=strlen(komenda);
for(int i=0;i<=dlugosc-1; i++){
char temp;
temp=komenda[i];
if(temp==' '){
char *reszta = strpbrk(komenda, sprawdzczy);
printf("%s\n", reszta);
}
}
}
int exxit(char komenda[1024]){
char *sprawdzczy = " ";
int dlugosc=strlen(komenda);
for(int i=0;i<=dlugosc-1; i++)
{
char temp;
temp=komenda[i];
char *sprawdzczy = " ";
if(temp==' '){
char *reszta = strpbrk(komenda, sprawdzczy);
int dlugoscReszty=strlen(reszta)-1;
printf("%d\n", dlugoscReszty);
int zwrocik=reszta[1];
return zwrocik-48; // -48 bo ASCII, nie wiedzialem jak to przekonwertowac "normalnie"
}
}
return 0;
}
char *getUname(int uid) {
struct passwd *user;
user = getpwuid(uid);
return user->pw_name;
};
char *getGname(int gid) {
struct group *grp;
grp = getgrgid(gid);
return grp->gr_name;
};
void getDate(const time_t time, char *date) {
struct tm *_date;
_date = localtime(&time);
strftime(date, 255, "%b %d %R", _date);
};
void getRights(int inode, char *rights) {
static char *RIGHTS[8] = {"---", "--x", "-w-", "-wx",
"r--", "r-x", "rw-", "rwx"};
static char FILE_TYPE[7] = {'-', 'd', 'c', 'b', 's', 'p', 'l'};
int mask[4];
int i;
for (i = 3; i > 0; i--) {
mask[i] = inode % 010;
inode /= 010;
}
switch (inode) {
case 0140:
mask[0] = 4;
break;
case 0120:
mask[0] = 6;
break;
case 0100:
mask[0] = 0;
break;
case 060:
mask[0] = 3;
break;
case 040:
mask[0] = 1;
break;
case 020:
mask[0] = 2;
break;
case 010:
mask[0] = 5;
break;
default:
mask[0] = 0;
break;
}
sprintf(rights, "%c%s%s%s", FILE_TYPE[mask[0]], RIGHTS[mask[1]],
RIGHTS[mask[2]], RIGHTS[mask[3]]);
};
void list_dir(char *name) {
DIR *dir;
struct dirent *dp;
struct stat statbuf;
char date[255];
char rights[10] = {};
printf("%s\n", name);
if ((dir = opendir(name)) == NULL) {
perror("Blad");
}
while ((dp = readdir(dir)) != NULL) {
if (stat(dp->d_name, &statbuf) == -1) continue;
if (dp->d_name[0] == '.') continue;
getDate(statbuf.st_mtime, date);
getRights(statbuf.st_mode, rights);
printf("%s %lu %s %s %ld %s %s\n", rights,
statbuf.st_nlink,
getUname(statbuf.st_uid), getGname(statbuf.st_gid), statbuf.st_size,
date, dp->d_name);
}
closedir(dir);
}
int main(int argc, char **argv) {
char komenda[1024];
do{
prompt();
gets(komenda);
if (strcmp(komenda, "help") == 0){
help();
}
else if (strcmp(komenda, "version") == 0){
version() ;
}
else if (strcmp(komenda, "ls") == 0){
chdir(*(++argv));
list_dir(".");
}
else if (strcmp(komenda, "pwd") == 0){
pwd() ;
}
else if ((komenda[0]=='e') && (komenda[1]=='c') && (komenda[2]=='h') && (komenda[3]=='o')){
echo(komenda);
}
else if ((komenda[0]=='e') && (komenda[1]=='x') && (komenda[2]=='i') && (komenda[3]=='t')){
int zwrot=exxit(komenda);
return zwrot;
}
else{
printf ("nie znaleziono polecenia. uzyj: help \n" ) ;
}
}while(1);
}