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_cexit

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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

 #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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