busybox/libbb/print_file.c

/* vi: set sw=4 ts=4: */
/*
 * Utility routines.
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "libbb.h"

void bb_xprint_and_close_file(FILE *file)
{
	bb_xfflush_stdout();
	/* Note: Do not use STDOUT_FILENO here, as this is a lib routine
	 *       and the calling code may have reassigned stdout. */
	if (bb_copyfd_eof(fileno(file), STDOUT_FILENO) == -1) {
		/* bb_copyfd outputs any needed messages, so just die. */
		exit(bb_default_error_retval);
	}
	/* Note: Since we're reading, don't bother checking the return value
	 *       of fclose().  The only possible failure is EINTR which
	 *       should already have been taken care of. */
	fclose(file);
}

/* Returns:
 *    0      if successful
 *   -1      if 'filename' does not exist or is a directory
 *  exits with default error code if an error occurs
 */

int bb_xprint_file_by_name(const char *filename)
{
	FILE *f;

#if 0
	/* This check shouldn't be necessary for linux, but is left
	* here disabled just in case. */
	struct stat statBuf;

	if(is_directory(filename, TRUE, &statBuf)) {
		bb_error_msg("%s: Is directory", filename);
	} else
#endif
	if ((f = bb_wfopen(filename, "r")) != NULL) {
		bb_xprint_and_close_file(f);
		return 0;
	}

	return -1;
}