busybox/libbb/print_file.c

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/* 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>
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#include <stdlib.h>
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#include <unistd.h>
#include "libbb.h"
void bb_xprint_and_close_file(FILE *file)
{
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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) {
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/* bb_copyfd outputs any needed messages, so just die. */
exit(bb_default_error_retval);
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}
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/* 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);
}
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/* 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)
{
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FILE *f;
#if 0
/* This check shouldn't be necessary for linux, but is left
* here disabled just in case. */
struct stat statBuf;
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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;
}
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return -1;
}