patchdiff2/unix_fct.cpp at master · deki0r/patchdiff2 · GitHub

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Patchdiff2

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License version 2 as

published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

#include <sys/types.h>

#include <sys/wait.h>

#include <signal.h>

#include <stdio.h>

#include <ida.hpp>

#include <kernwin.hpp>

#include "unix_fct.hpp"

#include "system.hpp"

struct ipc_data

{

int spipe;

int rpipe;

char *sname;

char *rname;

pid_t pid;

};

typedef struct ipc_data ipc_data_t;

/*------------------------------------------------*/

/* function : create_process */

/* description: fork/exec */

/*------------------------------------------------*/

pid_t create_process(char * cmd)

{

pid_t pid;

char *argv[4];

pid = fork();

if (pid == 0)

{

// Assume execvp is safe to call with const char strings

argv[0] = const_cast<char*>("/bin/sh");

argv[1] = const_cast<char*>("-c");

argv[2] = cmd;

argv[3] = NULL;

execvp(argv[0], argv);

exit(EXIT_FAILURE);

}

return pid;

}

/*------------------------------------------------*/

/* function : os_execute_command */

/* description: Executes a command by creating a */

/* new process */

/*------------------------------------------------*/

int os_execute_command(char * cmd, bool close, void * data)

{

ipc_data_t * id = (ipc_data_t *)data;

int ret = -1;

int status;

pid_t pid;

pid = create_process(cmd);

if (pid == -1) return -1;

if (close)

{

/* we wait until the process finished (IE: sig file is generated) */

if (waitpid(pid, &status, 0) == -1)

return -1;

}

else

id->pid = pid;

return 0;

}

/*------------------------------------------------*/

/* function : os_check_process */

/* description: checks process state */

/*------------------------------------------------*/

bool os_check_process(pid_t pid)

{

if (kill(pid, 0) == 0)

return true;

return false;

}

/*------------------------------------------------*/

/* function : os_copy_to_clipboard */

/* description: Copies data to clipboard */

/*------------------------------------------------*/

void os_copy_to_clipboard(char * data)

{

}

/*------------------------------------------------*/

/* function : os_get_pid */

/* description: Returns process ID */

/*------------------------------------------------*/

long os_get_pid()

{

return (long)getpid();

}

/*------------------------------------------------*/

/* function : os_unlink */

/* description: removes a link to a file */

/*------------------------------------------------*/

int os_unlink(const char * path)

{

return unlink(path);

}

/*------------------------------------------------*/

/* function : os_tempnam */

/* description: returns a temporary file name */

/*------------------------------------------------*/

void os_tempnam(char *data, size_t size, const char *suffix)

{

char *str = strdup(P_tmpdir "patchdiff2-XXXXXX");;

// TODO: Just use mktemp and don't mind the lack of extension

char *tempname = mktemp(str);

qsnprintf(data, size, "%s%s", tempname, suffix);

free(tempname);

}

/*------------------------------------------------*/

/* function : os_ipc_send */

/* description: Sends data on pipe */

/*------------------------------------------------*/

bool os_ipc_send(void * data, int type, idata_t * d)

{

ipc_data_t * id = (ipc_data_t *)data;

ssize_t num;

num = write(id->spipe, d, sizeof(*d));

if (num > 0) return true;

return false;

}

/*------------------------------------------------*/

/* function : os_ipc_recv */

/* description: Receives data on pipe */

/*------------------------------------------------*/

bool os_ipc_recv(void * data, int type, idata_t * d)

{

ipc_data_t * id = (ipc_data_t *)data;

fd_set rfds, efds;

struct timeval tv;

int ret;

tv.tv_sec = 0;

tv.tv_usec = 1000;

if (id->pid)

{

while (1)

{

FD_ZERO(&rfds);

FD_SET(id->rpipe, &rfds);

FD_ZERO(&efds);

FD_SET(id->rpipe, &efds);

ret = select(id->rpipe+1, &rfds, NULL, &efds, &tv);

if (ret > 0 && FD_ISSET(id->rpipe, &rfds))

break;

if (ret < 0 || (ret > 0 && FD_ISSET(id->rpipe, &efds)) || !os_check_process(id->pid))

return false;

}

else

{

FD_ZERO(&rfds);

FD_SET(id->rpipe, &rfds);

FD_ZERO(&efds);

FD_SET(id->rpipe, &efds);

ret = select(id->rpipe+1, &rfds, NULL, &efds, NULL);

if (!(ret > 0 && FD_ISSET(id->rpipe, &rfds)))

return false;

}

read(id->rpipe, d, sizeof(*d));

return true;

}

/*------------------------------------------------*/

/* function : os_ipc_init */

/* description: Inits interprocess communication */

/*------------------------------------------------*/

bool os_ipc_init(void ** data, long pid, int type)

{

char sname[512];

char rname[512];

ipc_data_t * id;

id = (ipc_data_t *)qalloc(sizeof(*id));

if (!id)

return false;

memset(id, '\0', sizeof(*id));

qsnprintf(sname, sizeof(sname), "/tmp/pdiff2spipe%ld", pid);

qsnprintf(rname, sizeof(rname), "/tmp/pdiff2rpipe%ld", pid);

id->sname = qstrdup(sname);

id->rname = qstrdup(rname);

if (type == IPC_SERVER)

{

mkfifo(sname, 0666);

id->spipe = open(sname, O_RDWR|O_NONBLOCK);

if (id->spipe == -1) goto error;

mkfifo(rname, 0666);

id->rpipe = open(rname, O_RDWR|O_NONBLOCK);

if (id->rpipe == -1) goto error;

}

else

{

id->spipe = open(rname, O_WRONLY);

if (id->spipe == -1) goto error;

id->rpipe = open(sname, O_RDONLY);

if (id->rpipe == -1) goto error;

}

*data = (void *)id;

return true;

error:

if (id->spipe) close(id->spipe);

if (id->rpipe) close(id->rpipe);

qfree(id);

return false;

}

/*------------------------------------------------*/

/* function : os_ipc_close */

/* description: Closes IPC */

/*------------------------------------------------*/

bool os_ipc_close(void * data)

{

ipc_data_t * id = (ipc_data_t *)data;

if (id->spipe) close(id->spipe);

if (id->rpipe) close(id->rpipe);

os_unlink(id->sname);

os_unlink(id->rname);

return true;

}

/*------------------------------------------------*/

/* function : os_get_pref_int */

/* description: Gets system preferences (integer) */

/*------------------------------------------------*/

bool os_get_pref_int(const char *name, int * i)

{

*i = 0;

return false;

}

patchdiff2/unix_fct.cpp at master · deki0r/patchdiff2 · GitHub

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