Test a stream's error flag
#include <stdio.h> int ferror( FILE* fp );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The ferror() function tests the error flag for the stream specified by fp.
0 if the error flag isn't set, or nonzero if the error flag is set.
#include <stdio.h> #include <stdlib.h> int main( void ) { FILE *fp; int c; fp = fopen( "file", "r" ); if( fp != NULL ) { c = fgetc( fp ); if( ferror( fp ) ) { printf( "Error reading file\n" ); } } fclose( fp ); return EXIT_SUCCESS; }
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |
clearerr(), feof(), fgetc(), fgetchar(), fgets(), fgetwc(), fgetws(), getc(), getc_unlocked(), getchar(), getchar_unlocked(), gets(), getw(), getwc(), getwchar(), perror(), strerror()