#include <rz_cons.h>
#include <limits.h>

Macros
#define	O_BINARY 0

Functions
static bool	__dupDescriptor (int fd, int fdn)

RZ_API int	rz_cons_pipe_open (const char *file, int fdn, int append)

RZ_API void	rz_cons_pipe_close (int fd)

Variables
static int	backup_fd = -1

static int	backup_fdn = 1

Macro Definition Documentation

◆ O_BINARY

#define O_BINARY 0

Definition at line 13 of file cpipe.c.

Function Documentation

◆ __dupDescriptor()

static bool __dupDescriptor	(	int	fd,
		int	fdn
	)

static

Definition at line 16 of file cpipe.c.

                                              {
 #if __WINDOWS__
     backup_fd = 2002 - (fd - 2); // windows xp has 2048 as limit fd
     return _dup2(fdn, backup_fd) != -1;
 #else
     backup_fd = sysconf(_SC_OPEN_MAX) - (fd - 2); // portable getdtablesize()
     if (backup_fd < 2) {
         backup_fd = 2002 - (fd - 2); // fallback
     }
     return dup2(fdn, backup_fd) != -1;
 #endif
 }

References backup_fd, dup2, and fd.

Referenced by rz_cons_pipe_open().

◆ rz_cons_pipe_close()

RZ_API void rz_cons_pipe_close ( int fd )

Definition at line 53 of file cpipe.c.

                                        {
     if (fd != -1) {
         close(fd);
         if (backup_fd != -1) {
             dup2(backup_fd, backup_fdn);
             close(backup_fd);
             backup_fd = -1;
         }
     }
 }

References backup_fd, backup_fdn, close, dup2, and fd.

Referenced by __rap_reg_profile(), DEFINE_HANDLE_TS_FCN_AND_SYMBOL(), rz_core_cmd_str_pipe(), and rz_core_cmd_subst_i().

◆ rz_cons_pipe_open()

RZ_API int rz_cons_pipe_open	(	const char *	file,
		int	fdn,
		int	append
	)

Definition at line 29 of file cpipe.c.

                                                                     {
     if (fdn < 1) {
         return -1;
     }
     const int fd_flags = O_BINARY | O_RDWR | O_CREAT | (append ? O_APPEND : O_TRUNC);
     int fd = rz_sys_open(file, fd_flags, 0644);
     if (fd == -1) {
         eprintf("rz_cons_pipe_open: Cannot open file '%s'\n", file);
         return -1;
     }
     if (backup_fd != -1) {
         close(backup_fd);
         // already set in __dupDescriptor // backup_fd = -1;
     }
     backup_fdn = fdn;
     if (!__dupDescriptor(fd, fdn)) {
         eprintf("Cannot dup stdout to %d\n", fdn);
         return -1;
     }
     close(fdn);
     dup2(fd, fdn);
     return fd;
 }