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63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
/*
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* A test support function which extends the file to the specified
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* length. This handles the implied open(), lseek(), write(), and close()
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* operations.
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*
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* The defined behavior is a seek() followed by a write() extends the file
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* and zero fills the new length part.
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*
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* $Id$
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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#include <pmacros.h>
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/*
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* test_extend routine
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*/
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void test_extend(
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char *file,
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off_t offset
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)
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{
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int fd;
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int status;
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char c = 0;
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fd = open( file, O_WRONLY );
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if ( fd == -1 ) {
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printf( "test_extend: open( %s ) failed : %s\n", file, strerror( errno ) );
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rtems_test_exit( 0 );
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}
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status = lseek( fd, offset - 1, SEEK_SET );
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assert( status != -1 );
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status = write( fd, &c, 1 );
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if ( status == -1 ) {
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printf( "test_extend: write( %s ) failed : %s\n", file, strerror( errno ) );
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rtems_test_exit( 0 );
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}
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if ( status != 1 ) {
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printf( "test_extend: write( %s ) only wrote %d of %d bytes\n",
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file, status, 1 );
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rtems_test_exit( 0 );
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}
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status = close( fd );
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assert( !status );
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}
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