obs-studio/libobs/util/pipe-posix.c

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/*
* Copyright (c) 2014 Hugh Bailey <obs.jim@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <sys/wait.h>
#include "bmem.h"
#include "pipe.h"
struct os_process_pipe {
bool read_pipe;
FILE *file;
};
os_process_pipe_t *os_process_pipe_create(const char *cmd_line,
const char *type)
{
struct os_process_pipe pipe = {0};
struct os_process_pipe *out;
if (!cmd_line || !type) {
return NULL;
}
pipe.file = popen(cmd_line, type);
pipe.read_pipe = *type == 'r';
if (pipe.file == (FILE*)-1 || pipe.file == NULL) {
return NULL;
}
out = bmalloc(sizeof(pipe));
*out = pipe;
return out;
}
int os_process_pipe_destroy(os_process_pipe_t *pp)
{
int ret = 0;
if (pp) {
int status = pclose(pp->file);
if (WIFEXITED(status))
ret = (int)(char)WEXITSTATUS(status);
bfree(pp);
}
return ret;
}
size_t os_process_pipe_read(os_process_pipe_t *pp, uint8_t *data, size_t len)
{
if (!pp) {
return 0;
}
if (!pp->read_pipe) {
return 0;
}
return fread(data, 1, len, pp->file);
}
size_t os_process_pipe_write(os_process_pipe_t *pp, const uint8_t *data,
size_t len)
{
if (!pp) {
return 0;
}
if (pp->read_pipe) {
return 0;
}
return fwrite(data, 1, len, pp->file);
}