ant-http/lib/mypty.c

198 lines
3.9 KiB
C
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2017-01-17 14:49:41 +01:00
//#define _XOPEN_SOURCE 600
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
//#define __USE_BSD #define _BSD_SOURCE
#include <termios.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include <string.h>
//#include <strings.h>
int read_buf(int fd, char*buf,int size)
{
int i = 0;
char c = '\0';
int n;
while ((i < size - 1) && (c != '\n'))
{
n = read(fd, &c, 1);
if (n > 0)
{
buf[i] = c;
i++;
}
else if(n == -1) return n;
else
c = '\n';
}
buf[i] = '\0';
return i;
}
int main(int ac, char *av[])
{
int fdm, fds;
int rc;
char input[150];
// Check arguments
fdm = posix_openpt(O_RDWR);
if (fdm < 0)
{
fprintf(stderr, "Error %d on posix_openpt()\n", errno);
return 1;
}
rc = grantpt(fdm);
if (rc != 0)
{
fprintf(stderr, "Error %d on grantpt()\n", errno);
return 1;
}
rc = unlockpt(fdm);
if (rc != 0)
{
fprintf(stderr, "Error %d on unlockpt()\n", errno);
return 1;
}
// Open the slave side ot the PTY
fds = open(ptsname(fdm), O_RDWR);
// Create the child process
if (fork())
{
fd_set fd_in;
// FATHER
// Close the slave side of the PTY
close(fds);
while (1)
{
// Wait for data from standard input and master side of PTY
FD_ZERO(&fd_in);
FD_SET(0, &fd_in);
FD_SET(fdm, &fd_in);
rc = select(fdm + 1, &fd_in, NULL, NULL, NULL);
switch(rc)
{
case -1 : fprintf(stderr, "Error %d on select()\n", errno);
exit(1);
default :
{
// If data on standard input
if (FD_ISSET(0, &fd_in))
{
rc = read(0, input, sizeof(input));
if (rc > 0)
{
// Send data on the master side of PTY
//printf("DATA sent\n");
write(fdm, input, rc);
}
else
{
if (rc < 0)
{
fprintf(stderr, "Error %d on read standard input\n", errno);
exit(1);
}
}
}
// If data on master side of PTY
if (FD_ISSET(fdm, &fd_in))
{
rc = read(fdm, input, sizeof(input));
if (rc > 0)
{
// Send data on standard output
write(1, input, rc);
}
else
{
if (rc <= 0)
{
fprintf(stderr, "Error %d on read master PTY\n", errno);
exit(1);
}
}
}
}
} // End switch
} // End while
}
else
{
struct termios slave_orig_term_settings; // Saved terminal settings
struct termios new_term_settings; // Current terminal settings
// CHILD
// Close the master side of the PTY
close(fdm);
// Save the defaults parameters of the slave side of the PTY
rc = tcgetattr(fds, &slave_orig_term_settings);
// Set RAW mode on slave side of PTY
new_term_settings = slave_orig_term_settings;
cfmakeraw (&new_term_settings);
tcsetattr (fds, TCSANOW, &new_term_settings);
// The slave side of the PTY becomes the standard input and outputs of the child process
close(0); // Close standard input (current terminal)
close(1); // Close standard output (current terminal)
close(2); // Close standard error (current terminal)
dup(fds); // PTY becomes standard input (0)
dup(fds); // PTY becomes standard output (1)
dup(fds); // PTY becomes standard error (2)
// Now the original file descriptor is useless
close(fds);
// Make the current process a new session leader
setsid();
// As the child is a session leader, set the controlling terminal to be the slave side of the PTY
// (Mandatory for programs like the shell to make them manage correctly their outputs)
ioctl(0, TIOCSCTTY, 1);
system("/bin/bash");
/*fd_set child_fds;
char cinput[150];
while(1){
//printf("Wait for data\n");
FD_ZERO(&child_fds);
FD_SET(0, &child_fds);
rc = select(1, &child_fds,NULL, NULL, NULL);
if(rc == -1)
{
break;
}
else
{
if (FD_ISSET(0, &child_fds))
{
rc = read_buf(0, cinput, sizeof(cinput));
if (rc > 0)
{
system(cinput);
} else if(rc < 0) break;
}
}
}*/
// if Error...
_exit(1);
}
return 0;
}