/usr/include/gmerlin/subprocess.h is in libgmerlin-dev 1.2.0~dfsg+1-5.
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* gmerlin - a general purpose multimedia framework and applications
*
* Copyright (c) 2001 - 2011 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 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/>.
* *****************************************************************/
/** \defgroup subprocesses Subprocesses
* \ingroup utils
* \brief Subprocesses with pipable stdin, stdout and stderr
*
* @{
*/
/** \brief Subprocess handle
*/
typedef struct
{
int stdin_fd; //!< Filedescriptor, which is a pipe to the stdin of the process
int stdout_fd; //!< Filedescriptor, which is a pipe to the stdout of the process
int stderr_fd;//!< Filedescriptor, which is a pipe to the stderr of the process
void * priv; //!< Internals made opaque
} bg_subprocess_t;
/** \brief Create a subprocess
* \param command Command, will be passed to /bin/sh
* \param do_stdin 1 if stdin should be connected by a pipe, 0 else
* \param do_stdout 1 if stdout should be connected by a pipe, 0 else
* \param do_stderr 1 if stderr should be connected by a pipe, 0 else
*
* A new handle with the runnig child program or NULL
*/
bg_subprocess_t * bg_subprocess_create(const char * command, int do_stdin,
int do_stdout, int do_stderr);
/** \brief Send a signal to a process
* \param proc A subprocess
* \param signal Which signal to send
*
* Types for signal are the same as in \<signal.h\>
*/
void bg_subprocess_kill(bg_subprocess_t* proc, int signal);
/** \brief Close a subprocess and free all associated memory
* \param proc A subprocess
* \returns The return code of the program
*/
int bg_subprocess_close(bg_subprocess_t* proc);
/** \brief Read a line from stdout or stderr of a process
* \param fd The filesecriptor
* \param ret String (will be realloced)
* \param ret_alloc Allocated size of the string (will be changed with each realloc)
* \param timeout Timeout in milliseconds
* \returns 1 if a line could be read, 0 else
*/
int bg_subprocess_read_line(int fd, char ** ret, int * ret_alloc,
int timeout);
/** \brief Read data from stdout or stderr of a process
* \param fd The filesecriptor
* \param ret Pointer to allocated memory, where the data will be placed
* \param len How many bytes to read
* \returns The number of bytes read
*
* If the return value is smaller than the number of bytes you requested,
* you can assume, that the process finished and won't send more data.
*/
int bg_subprocess_read_data(int fd, uint8_t * ret, int len);
/** \brief Run a command as a subprocess
* \param command Command to run
* \return Return code of the program
*
* This is pretty much the same as the system() function
*/
int bg_system(const char * command);
/** @} */
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