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/* Copyright (c) 1994 Sun Wu, Udi Manber, Burra Gopal. All Rights Reserved. */
/*
* checkfile.c
* takes a file name and checks to see if a file is a regular ascii file
*
*/
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include "checkfile.h"
#ifndef S_ISREG
#define S_ISREG(mode) (0100000&(mode))
#endif
#ifndef S_ISDIR
#define S_ISDIR(mode) (0040000&(mode))
#endif
#define MAXLINE 512
extern char Progname[];
extern int errno;
unsigned char ibuf[MAXLINE];
/**************************************************************************
*
* check_file
* input: filename or path (null-terminated character string)
* returns: int (0 if file is a regular file, non-0 if not)
*
* uses stat(2) to see if a file is a regular file.
*
***************************************************************************/
int check_file(fname)
char *fname;
{
struct stat buf;
if (my_stat(fname, &buf) != 0) {
if (errno == ENOENT)
return NOSUCHFILE;
else
return STATFAILED;
}
else {
/*
int ftype;
if (S_ISREG(buf.st_mode)) {
if ((ftype = samplefile(fname)) == ISASCIIFILE) {
return ISASCIIFILE;
} else if (ftype == ISBINARYFILE) {
return ISBINARYFILE;
} else if (ftype == OPENFAILED) {
return OPENFAILED;
}
}
if (S_ISDIR(buf.st_mode)) {
return ISDIRECTORY;
}
if (S_ISBLK(buf.st_mode)) {
return ISBLOCKFILE;
}
if (S_ISSOCK(buf.st_mode)) {
return ISSOCKET;
}
*/
return 0;
}
}
/***************************************************************************
*
* samplefile
* reads in the first part of a file, and checks to see that it is
* all ascii.
*
***************************************************************************/
/*
int samplefile(fname)
char *fname;
{
char *p;
int numread;
int fd;
if ((fd = open(fname, O_RDONLY)) == -1) {
fprintf(stderr, "open failed on filename %s\n", fname);
return OPENFAILED;
}
-comment- No need to use alloc_buf and free_buf here since always read from non-ve fd -tnemmoc-
if (numread = fill_buf(fd, ibuf, MAXLINE)) {
close(fd);
p = ibuf;
while (ISASCII(*p++) && --numread);
if (!numread) {
return(ISASCIIFILE);
} else {
return(ISBINARYFILE);
}
} else {
close(fd);
return(ISASCIIFILE);
}
}
*/
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