io.h

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#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct {
  int saved_stdout_fd;  
  int saved_stderr_fd;  
  int pipe_fd;          
} log_io_t;
 
log_io_t log_io_start(void);
 
void log_io_stop(log_io_t capture, const char *prefix);
 
#define LOG_IO(prefix, block)                                                 \
  do {                                                                        \
    log_io_t _log_io = log_io_start();                                       \
    block;                                                                    \
    log_io_stop(_log_io, (prefix));                                         \
  } while (0)
 
#ifdef __cplusplus
}
#endif