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Added packaging functionality, added packaged exe support to filesystem

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Adds package.c and package.h. Adds support for the `--pack` argument for
packing a project directory into an exe or tar file.
This commit is contained in:
rxi
2016-10-01 00:35:22 +01:00
parent 0506b3b0ca
commit cb61fa1ecd
4 changed files with 310 additions and 6 deletions
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84
src/filesystem.c
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@@ -242,14 +242,80 @@ static void* tar_read(Mount *mnt, const char *filename, int *size) {
}
static int tar_mount(Mount *mnt, const char *path) {
mtar_t *tar = dmt_malloc( sizeof(*tar) );
typedef struct { FILE *fp; int offset; } TarStream;
/* Try to init tar */
int err = mtar_open(tar, path, "r");
static int tar_stream_read(mtar_t *tar, void *data, unsigned size) {
TarStream *t = tar->stream;
unsigned res = fread(data, 1, size, t->fp);
return (res == size) ? MTAR_ESUCCESS : MTAR_EREADFAIL;
}
static int tar_stream_seek(mtar_t *tar, unsigned offset) {
TarStream *t = tar->stream;
int res = fseek(t->fp, t->offset + offset, SEEK_SET);
return (res == 0) ? MTAR_ESUCCESS : MTAR_ESEEKFAIL;
}
static int tar_stream_close(mtar_t *tar) {
TarStream *t = tar->stream;
fclose(t->fp);
dmt_free(t);
return MTAR_ESUCCESS;
}
static int tar_mount(Mount *mnt, const char *path) {
FILE *fp = NULL;
TarStream *stream = NULL;
mtar_t *tar = NULL;
/* Try to open file */
fp = fopen(path, "rb");
if (!fp) {
goto fail;
}
/* Init tar stream */
stream = dmt_calloc(1, sizeof(*stream));
if (!stream) {
goto fail;
}
stream->fp = fp;
/* Init tar */
tar = dmt_calloc(1, sizeof(*tar));
if (!tar) {
goto fail;
}
tar->read = tar_stream_read;
tar->seek = tar_stream_seek;
tar->close = tar_stream_close;
tar->stream = stream;
/* Check start of file for valid tar header */
mtar_header_t h;
int err = mtar_read_header(tar, &h);
/* If checking the start of the file failed then check the end of file for a
* "TAR\0" tag and offset, this would have been added when packaging (see
* `package.c`) to indicate the offset of the tar archive's beginning from the
* file's end */
if (err) {
dmt_free(tar);
return FILESYSTEM_EFAILURE;
int offset;
char buf[4] = "";
fseek(fp, -8, SEEK_END);
fread(buf, 1, 4, fp);
fread(&offset, 1, 4, fp);
if ( !memcmp(buf, "TAR\0", 4) ) {
fseek(fp, -offset, SEEK_END);
stream->offset = ftell(fp);
}
mtar_rewind(tar);
err = mtar_read_header(tar, &h);
if (err) {
goto fail;
}
}
/* Init mount */
@@ -262,6 +328,12 @@ static int tar_mount(Mount *mnt, const char *path) {
/* Return ok */
return FILESYSTEM_ESUCCESS;
fail:
if (fp) fclose(fp);
dmt_free(tar);
dmt_free(stream);
return FILESYSTEM_EFAILURE;
}