Basic sub shell idea Version 2.5
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define SIZE 256
#define clrscr() printf("\e[1;1H\e[2J")
void printFileAsHex(FILE* file);
char toVisibleCharacter(int byteVal);
void writeLine(char* lineBuffer, int buflen);
char upperToHex(int byteVal);
char lowerToHex(int byteVal);
char nibbleToHex(int nibble);
#define LINELEN 16
void help_function() {
printf("\n Index of commands for coreline 2.5Beta \n");
printf("----------------------------------------\n");
printf("1. uptime - total systems up time.\n");
printf("2. cls - clear the screen.\n");
printf("3. helpme - This help screen.\n");
printf(" Sub commands: help & cmdlist.\n");
printf("4. fileinfo - Basic File info. \n");
printf("5. filesize - [input1] file size. \n");
printf("6. time - The Date & Time. \n");
printf("7. typefile - [input1] dump text file contents.\n");
printf("8. remove - [input1] Remove a file. \n");
printf(" Sub commands: del & remove.\n");
printf("9. rename - [input1] [input2] Rename a file. \n");
printf("10. hexdump - [input1] hex dump of file. \n");
printf(" Sub commands: hex and/or hexdump. \n");
printf("11. shell - Open a new bash shell, \n");
printf(" type exit to return to coreline prompt.\n");
printf("12. fortune - A random fortune just for you.\n");
printf("\n Bash Command line Usage: \n");
printf("coreline [input1] [input2] \n\n");
return 1;
}
int main(int argc, char *argv[])
{
int i, j = 20;
for( i = 0; i <= j; i ++ ) {
if( i == 15) { continue; }
/* Start inside the header of the loop */
char name[12];
printf("coreline#");
scanf("%s", &name);
if (strcmp ("fileinfo", name) ==0 ) {
char cmpname[256];
struct utsname uts;
struct stat file_stats;
if ( stat( argv[1], &file_stats) == -1 ) /* get info */
perror(argv[1]);
else
printf("filename: %s total size, in bytes: %ld \n", argv[1] ,file_stats.st_size);
printf(" %s last access: %s ", argv[1] ,ctime(&file_stats.st_atime));
printf("%s last modification: %s ", argv[1] ,ctime(&file_stats.st_mtime));
printf("last change: %s ", ctime(&file_stats.st_ctime));
printf("device: %lld ",file_stats.st_dev);
printf("** inode: %ld **",file_stats.st_ino);
printf(" protection: %o \n",file_stats.st_mode);
printf(" number of hard links: %d\n",file_stats.st_nlink);
printf(" user ID of owner: %d --",file_stats.st_uid);
printf(" group ID of owner: %d\n",file_stats.st_gid);
printf(" device type (if inode device): %lld\n",file_stats.st_rdev);
printf(" blocksize for filesystem I/O: %ld\n",file_stats.st_blksize);
printf(" number of blocks allocated: %ld\n\n",file_stats.st_blocks);
if(gethostname(cmpname, 255) == 0)
printf(" Host Name : %s\n", cmpname);
if(uname(&uts) == 0) {
printf(" System Name : %s\n", uts.sysname);
printf(" Machine Name : %s\n", uts.machine);
printf(" Node Name : %s\n", uts.nodename);
printf(" Release Name : %s\n", uts.release);
printf(" Version Name : %s\n", uts.version);
}
} else
if (strcmp ("filesize", name) ==0 ) {
struct stat infobuf;
if ( stat( argv[1], &infobuf) == -1 )
perror(argv[1]);
else
printf(" The size of %s is %d\n", argv[1], infobuf.st_size );
}
else
if (strcmp ("uptime", name) ==0 ) {
struct sysinfo sys_info;
struct group* grp;
gid_t gid;
int days, hours, mins;
if(sysinfo(&sys_info) != 0)
perror("sysinfo");
days = sys_info.uptime / 86400;
hours = (sys_info.uptime / 3600) - (days * 24);
mins = (sys_info.uptime / 60) - (days * 1440) - (hours * 60);
printf("Ubuntu Uptime: %ddays, %dhours, %dminutes, %ldseconds \n", days, hours, mins, sys_info.uptime % 60);
printf("Load Avgs: 1min(%ld) 5min(%ld) 15min(%ld) \n", sys_info.loads[0], sys_info.loads[1], sys_info.loads[2]);
printf("Total Ram: %ldk \n", sys_info.totalram / 1024);
printf("Total Free Ram: %ldk \n", sys_info.freeram / 1024);
printf("Total memory units: %ld \n", sys_info.mem_unit);
printf("Shared Ram: %ldk \n", sys_info.sharedram / 1024);
printf("Buffered Ram: %ldk \n", sys_info.bufferram / 1024);
printf("Total Swap: %ldk - Free Swap: %ldk \n", sys_info.totalswap / 1024, sys_info.freeswap / 1024);
printf("Total Number of open processes: %d\n", sys_info.procs);
gid = getgid();
printf("Group ID: %d ", gid);
if((grp = getgrgid(gid)) == NULL )
return 1;
printf("Group %s \n", grp->gr_name );
if(strcmp(grp->gr_passwd,"x") == 0)
printf("Password is protected by shadow file.\n");
else
printf("Password: %s\n", grp->gr_passwd);
} else
if (strcmp ("time", name) ==0 ) {
char buffer[SIZE];
time_t curtime;
struct tm *loctime;
curtime = time (NULL);
loctime = localtime (&curtime);
fputs (asctime (loctime), stdout);
strftime (buffer, SIZE, "Today is %A, %B %d.\n", loctime);
fputs (buffer, stdout);
strftime (buffer, SIZE, "The time is %I:%M %p.\n", loctime);
fputs (buffer, stdout);
} else if (strcmp ("clear", name) ==0 ) {
clrscr();
} else if (strcmp ("cls", name) ==0 ) {
clrscr();
} else if (strcmp ("typefile", name) ==0 ) {
char str[SIZE];
FILE * file;
file = fopen( argv[1] , "r");
if (file) {
while (fscanf(file, "%s", str)!=EOF)
printf("%s", str);
fclose(file);
}
} else if (strcmp ("help", name) ==0 ) {
help_function();
} else if (strcmp ("helpme", name) ==0) {
help_function();
} else if (strcmp ("cmdlist", name) ==0) {
help_function();
} else if (strcmp ("remove", name) ==0) {
if(remove(argv[1])) printf("Error: File %s not removed.\n", argv[1]);
else
printf("File %s removed. \n", argv[1]);
} else if (strcmp ("del", name) ==0) {
if(remove(argv[1])) printf("Error: file %s not removed.\n", argv[1]);
else
printf("File %s removed. \n", argv[1]);
} else if (strcmp ("rename", name) ==0) {
if(rename(argv[1], argv[2]) != 0) {
printf("Error: Renameing file %s to %s rename fail!", argv[1], argv[2]); }
} else if (strcmp ("hexdump", name) ==0) {
FILE *dumpit;
dumpit = fopen(argv[1], "rb");
printFileAsHex(dumpit);
fclose(dumpit);
} else if (strcmp ("hex", name) ==0) {
FILE *dumpit;
dumpit = fopen(argv[1], "rb");
printFileAsHex(dumpit);
fclose(dumpit);
} else if (strcmp ("shell", name) ==0) {
printf("Droping to new bash shell.");
printf("\n\n Note: you have not exited coreline, \n");
printf("type exit to close this bash shell & return to coreline prompt. \n\n");
system("/bin/bash");
} else if (strcmp("fortune", name) ==0) {
system("fortune");
} else if (strcmp("exit", name) ==0) {
printf("Exiting Program Good bye! \n");
return 0;
} else if (strcmp("quit", name) ==0) {
printf("Exiting Program Good bye! \n");
return 0;
}
else {
}
}
return 0;
}
void printFileAsHex(FILE* file)
{
int count = 0;
char buffer[LINELEN];
while(1)
{
int byteVal = fgetc(file);
if(EOF == byteVal)
{
break;
}
buffer[count] = byteVal;
count++;
if(count >= LINELEN)
{
writeLine(buffer, LINELEN);
count = 0;
}
}
if(count > 0)
{
writeLine(buffer, count);
}
}
char toVisibleCharacter(int byteVal)
{
if(byteVal >= 32 && byteVal <= 126)
{
return (char) byteVal;
}
return '_';
}
void writeLine(char* lineBuffer, int buflen)
{
int i;
for(i=0; i
{
char chu = upperToHex(lineBuffer[i]);
char chl = lowerToHex(lineBuffer[i]);
printf("%c%c", chu, chl);
}
if(buflen < LINELEN)
{
for(i = LINELEN - buflen; i>0; i--)
{
printf("0");
}
}
printf("\t");
for(i=0; i
{
char ch = toVisibleCharacter(lineBuffer[i]);
printf("%c", ch);
}
printf("\r\n");
}
char upperToHex(int byteVal)
{
int i = (byteVal & 0xF0) >> 4;
return nibbleToHex(i);
}
char lowerToHex(int byteVal)
{
int i = (byteVal & 0x0F);
return nibbleToHex(i);
}
char nibbleToHex(int nibble)
{
const int ascii_zero = 48;
const int ascii_a = 65;
if((nibble >= 0) && (nibble <= 9))
{
return (char) (nibble + ascii_zero);
}
if((nibble >= 10) && (nibble <= 15))
{
return (char) (nibble - 10 + ascii_a);
}
return '?';
}
