Initial commit

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 205 insertions, 0 deletions

diff --git a/omar.c b/omar.c
new file mode 100644
index 0000000..240592c
--- /dev/null
+++ b/omar.c
@@ -0,0 +1,205 @@
+/*
+ * 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;
+}