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/*
** Author: Hamid Alipour http://codingrecipes.com http://twitter.com/code_head
** SQLite style license:
**
** 2001 September 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**/
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <paths.h>
#include <sys/stat.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include "popen_plus.hpp"
namespace CG3_PopenPlus {
popen_plus_process *popen_plus(const char *command)
{
int inpipe[2];
int outpipe[2];
char *argv[4];
popen_plus_process *process = (popen_plus_process*)malloc(sizeof(popen_plus_process));
if (!process)
goto error_out;
if (pipe(inpipe) != 0)
goto clean_process_out;
if (pipe(outpipe) != 0)
goto clean_inpipe_out;
process->read_fp = fdopen(outpipe[READ], "rb");
if (!process->read_fp)
goto clean_outpipe_out;
process->write_fp = fdopen(inpipe[WRITE], "wb");
if (!process->write_fp)
goto clean_read_fp_out;
if (pthread_mutex_init(&process->mutex, NULL) != 0)
goto clean_write_fp_out;
process->pid = fork();
if (process->pid == -1)
goto clean_mutex_out;
if (process->pid == 0) {
close(outpipe[READ]);
close(inpipe[WRITE]);
if (inpipe[READ] != STDIN_FILENO) {
dup2(inpipe[READ], STDIN_FILENO);
close(inpipe[READ]);
}
if (outpipe[WRITE] != STDOUT_FILENO) {
dup2(outpipe[WRITE], STDOUT_FILENO);
close(outpipe[WRITE]);
}
char _sh[] = "sh";
char _c[] = "-c";
argv[0] = _sh;
argv[1] = _c;
argv[2] = (char *) command;
argv[3] = NULL;
execv(_PATH_BSHELL, argv);
exit(127);
}
close(outpipe[WRITE]);
close(inpipe[READ]);
return process;
clean_mutex_out:
pthread_mutex_destroy(&process->mutex);
clean_write_fp_out:
fclose(process->write_fp);
clean_read_fp_out:
fclose(process->read_fp);
clean_outpipe_out:
close(outpipe[READ]);
close(outpipe[WRITE]);
clean_inpipe_out:
close(inpipe[READ]);
close(inpipe[WRITE]);
clean_process_out:
free(process);
error_out:
return NULL;
}
int popen_plus_close(popen_plus_process *process)
{
int pstat = 0;
pid_t pid = 0;
/**
* If someone else destrys this mutex, then this call will fail and we know
* that another thread already cleaned up the process so we can safely return
* and since we are destroying this mutex bellow then we don't need to unlock
* it...
*/
if (pthread_mutex_lock(&process->mutex) != 0)
return 0;
if (process->pid != -1) {
do {
pid = waitpid(process->pid, &pstat, 0);
} while (pid == -1 && errno == EINTR);
}
if (process->read_fp)
fclose(process->read_fp);
if (process->write_fp)
fclose(process->write_fp);
pthread_mutex_destroy(&process->mutex);
free(process);
return (pid == -1 ? -1 : pstat);
}
int popen_plus_kill(popen_plus_process *process)
{
char command[64];
sprintf(command, "kill -9 %d", process->pid);
system(command);
return 0;
}
int popen_plus_kill_by_id(int process_id)
{
char command[64];
sprintf(command, "kill -9 %d", process_id);
system(command);
return 0;
}
int popen_plus_terminate(popen_plus_process *process)
{
char command[64];
sprintf(command, "kill -TERM %d", process->pid);
system(command);
return 0;
}
int popen_plus_terminate_with_id(int process_id)
{
char command[64];
sprintf(command, "kill -TERM %d", process_id);
system(command);
return 0;
}
}
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