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/*
* Copyright (c) 2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/stat.h>
#include <sys/errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <stddef.h>
#include <assert.h>
#include <dirent.h>
static const char *inpath = NULL;
static const char *outpath = NULL;
/*
* OMAR state machine.
*
* @outfd: Output file descriptor.
* @inbuf: Input file buffer.
* @pos: Position in input file.
*/
struct omar_state {
int infd;
char *inbuf;
off_t pos;
};
/*
* The OMAR file header, describes the basics
* of a file.
*
* @name: Name of the file (*not* the full path)
* @len: Length of the file
* @next_hdr: Offset from start of archive to next header
*/
struct omar_hdr {
char *name;
size_t len;
off_t next_hdr;
};
static void
help(void)
{
printf("--------------------------------------\n");
printf("The OSMORA archive format\n");
printf("Usage: omar -i [input_dir] -o [output]\n");
printf("-h Show this help screen\n");
printf("--------------------------------------\n");
}
static void
state_destroy(struct omar_state *stp)
{
close(stp->infd);
if (stp->inbuf != NULL) {
free(stp->inbuf);
}
}
static int
state_init(struct omar_state *res)
{
struct stat sb;
int retval = 0;
assert(res != NULL);
res->infd = open(inpath, O_RDONLY);
if (res->infd < 0) {
perror("open");
fprintf(stderr, "omar: failed to open input file\n");
return res->infd;
}
if ((retval = fstat(res->infd, &sb)) < 0) {
perror("fstat");
fprintf(stderr, "omar: failed to stat input file\n");
close(res->infd);
return retval;
}
if (!S_ISDIR(sb.st_mode)) {
fprintf(stderr, "omar: input file is not a directory\n");
close(res->infd);
return -ENOTDIR;
}
res->inbuf = malloc(sb.st_size);
if (res->inbuf == NULL) {
close(res->infd);
fprintf(stderr, "omar: failed to allocate inbuf\n");
return -ENOMEM;
}
return 0;
}
/*
* Start creating an archive from the
* basepath of a directory.
*/
static int
archive_create(const char *base)
{
DIR *dp;
struct dirent *ent;
struct omar_hdr hdr;
char pathbuf[256];
dp = opendir(base);
if (dp == NULL) {
return -EIO;
}
while ((ent = readdir(dp)) != NULL) {
if (ent->d_name[0] == '.') {
continue;
}
snprintf(pathbuf, sizeof(pathbuf), "%s/%s", base, ent->d_name);
if (ent->d_type == DT_DIR) {
archive_create(pathbuf);
}
printf("%s\n", pathbuf);
}
return 0;
}
int
main(int argc, char **argv)
{
struct omar_state st = {0};
int optc, retval;
int error;
if (argc < 2) {
help();
return -1;
}
while ((optc = getopt(argc, argv, "hi:o:")) != -1) {
switch (optc) {
case 'i':
inpath = optarg;
break;
case 'o':
outpath = optarg;
break;
case 'h':
help();
return 0;
default:
help();
return -1;
}
}
if (inpath == NULL) {
fprintf(stderr, "omar: no input path\n");
help();
return -1;
}
if (outpath == NULL) {
fprintf(stderr, "omar: no output path\n");
help();
return -1;
}
if ((error = state_init(&st)) != 0) {
return error;
}
retval = archive_create(inpath);
state_destroy(&st);
return retval;
}
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