_cexit

Header File

process.h

Category

Process Control Routines

Prototype

void _cexit(void);

Description

Performs exit cleanup without terminating the program.

_cexit performs the same cleanup as exit, closing all files but without terminating the calling process. The _cexit function calls any registered "exit functions" (posted with atexit). Before _cexit returns, it flushes all input/output buffers and closes all streams that were open.

Return Value

None.

Example

Copy Code

#include <windows.h>
#include <process.h>
#include <io.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
void exit_func(void)
{
  printf("Exit function called\n\n");
  printf("Close Window to return to program... It will beep if able to read from file");
}
int main(void)
{
  int fd;
  char c;
  if ((fd = open("_cexit.c",O_RDONLY)) < 0)
  {
printf("Unable to open _cexit.c for reading\n");
return 1;
  }
  atexit(exit_func);
  if (read(fd,&c,1) != 1)
printf("Unable to read from open file handle %d before _cexit\n",fd);
  else
printf("Successfully read from open file handle %d before _cexit\n",fd);
  _cexit();
  if (read(fd,&c,1) == 1)
  MessageBeep(0);
  return 0;
}

Portability

POSIX	Win32	ANSI C	ANSI C++
	+

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