Exit the calling program
#include <stdlib.h> void exit( int status );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The exit() function causes the calling program to exit normally. When a program exits normally:
The exit() function doesn't return.
#include <stdio.h> #include <stdlib.h> int main( int argc, char *argv[] ) { FILE *fp; if( argc <= 1 ) { fprintf( stderr, "Missing argument\n" ); exit( EXIT_FAILURE ); } fp = fopen( argv[1], "r" ); if( fp == NULL ) { fprintf( stderr, "Unable to open '%s'\n", argv[1] ); exit( EXIT_FAILURE ); } fclose( fp ); exit( EXIT_SUCCESS ); /* You'll never get here; this prevents compiler warnings about "function has no return value". */ return EXIT_SUCCESS; }
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |