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/* $Id$ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <assert.h>
#include <err.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libmdocml.h"
#define BUFFER_IN_DEF BUFSIZ /* See begin_bufs. */
#define BUFFER_OUT_DEF BUFSIZ /* See begin_bufs. */
static void usage(void);
static int begin_io(const struct md_args *,
char *, char *);
static int leave_io(const struct md_buf *,
const struct md_buf *, int);
static int begin_bufs(const struct md_args *,
struct md_buf *, struct md_buf *);
static int leave_bufs(const struct md_buf *,
const struct md_buf *, int);
int
main(int argc, char *argv[])
{
int c;
char *out, *in;
struct md_args args;
extern char *optarg;
extern int optind;
out = in = NULL;
(void)memset(&args, 0, sizeof(struct md_args));
while (-1 != (c = getopt(argc, argv, "o:vW")))
switch (c) {
case ('o'):
out = optarg;
break;
case ('v'):
args.verbosity++;
break;
case ('W'):
args.warnings |= MD_WARN_ALL;
break;
default:
usage();
return(1);
}
argv += optind;
argc -= optind;
if (1 == argc)
in = *argv++;
return(begin_io(&args, out ? out : "-", in ? in : "-"));
}
/*
* Close out file descriptors opened in begin_io. If the descriptor
* refers to stdin/stdout, then do nothing.
*/
static int
leave_io(const struct md_buf *out,
const struct md_buf *in, int c)
{
assert(out);
assert(in);
if (-1 != in->fd && -1 == close(in->fd)) {
assert(in->name);
warn("%s", in->name);
c = 1;
}
if (-1 != out->fd && STDOUT_FILENO != out->fd &&
-1 == close(out->fd)) {
assert(out->name);
warn("%s", out->name);
c = 1;
}
if (1 == c && STDOUT_FILENO != out->fd)
if (-1 == unlink(out->name))
warn("%s", out->name);
return(c);
}
/*
* Open file descriptors or assign stdin/stdout, if dictated by the "-"
* token instead of a filename.
*/
static int
begin_io(const struct md_args *args, char *out, char *in)
{
struct md_buf fi;
struct md_buf fo;
#define FI_FL O_RDONLY
#define FO_FL O_WRONLY|O_CREAT|O_TRUNC
assert(args);
assert(out);
assert(in);
bzero(&fi, sizeof(struct md_buf));
bzero(&fo, sizeof(struct md_buf));
fi.fd = STDIN_FILENO;
fo.fd = STDOUT_FILENO;
fi.name = in;
fo.name = out;
if (0 != strncmp(fi.name, "-", 1))
if (-1 == (fi.fd = open(fi.name, FI_FL, 0))) {
warn("%s", fi.name);
return(leave_io(&fo, &fi, 1));
}
if (0 != strncmp(fo.name, "-", 1))
if (-1 == (fo.fd = open(fo.name, FO_FL, 0644))) {
warn("%s", fo.name);
return(leave_io(&fo, &fi, 1));
}
return(leave_io(&fo, &fi, begin_bufs(args, &fo, &fi)));
}
/*
* Free buffers allocated in begin_bufs.
*/
static int
leave_bufs(const struct md_buf *out,
const struct md_buf *in, int c)
{
assert(out);
assert(in);
if (out->buf)
free(out->buf);
if (in->buf)
free(in->buf);
return(c);
}
/*
* Allocate buffers to the maximum of either the input file's blocksize
* or BUFFER_IN_DEF/BUFFER_OUT_DEF, which should be around BUFSIZE.
*/
static int
begin_bufs(const struct md_args *args,
struct md_buf *out, struct md_buf *in)
{
struct stat stin, stout;
int c;
assert(args);
assert(in);
assert(out);
if (-1 == fstat(in->fd, &stin)) {
warn("%s", in->name);
return(1);
} else if (STDIN_FILENO != in->fd && 0 == stin.st_size) {
warnx("%s: empty file", in->name);
return(1);
} else if (-1 == fstat(out->fd, &stout)) {
warn("%s", out->name);
return(1);
}
in->bufsz = MAX(stin.st_blksize, BUFFER_IN_DEF);
out->bufsz = MAX(stout.st_blksize, BUFFER_OUT_DEF);
if (NULL == (in->buf = malloc(in->bufsz))) {
warn("malloc");
return(leave_bufs(out, in, 1));
} else if (NULL == (out->buf = malloc(out->bufsz))) {
warn("malloc");
return(leave_bufs(out, in, 1));
}
c = md_run(args, out, in);
return(leave_bufs(out, in, -1 == c ? 1 : 0));
}
static void
usage(void)
{
extern char *__progname;
(void)printf("usage: %s [-vW] [-o outfile] [infile]\n", __progname);
}
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