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Diffstat (limited to 'third_party/git/archive-tar.c')
-rw-r--r--third_party/git/archive-tar.c486
1 files changed, 0 insertions, 486 deletions
diff --git a/third_party/git/archive-tar.c b/third_party/git/archive-tar.c
deleted file mode 100644
index f1a1447ebda0..000000000000
--- a/third_party/git/archive-tar.c
+++ /dev/null
@@ -1,486 +0,0 @@
-/*
- * Copyright (c) 2005, 2006 Rene Scharfe
- */
-#include "cache.h"
-#include "config.h"
-#include "tar.h"
-#include "archive.h"
-#include "object-store.h"
-#include "streaming.h"
-#include "run-command.h"
-
-#define RECORDSIZE	(512)
-#define BLOCKSIZE	(RECORDSIZE * 20)
-
-static char block[BLOCKSIZE];
-static unsigned long offset;
-
-static int tar_umask = 002;
-
-static int write_tar_filter_archive(const struct archiver *ar,
-				    struct archiver_args *args);
-
-/*
- * This is the max value that a ustar size header can specify, as it is fixed
- * at 11 octal digits. POSIX specifies that we switch to extended headers at
- * this size.
- *
- * Likewise for the mtime (which happens to use a buffer of the same size).
- */
-#if ULONG_MAX == 0xFFFFFFFF
-#define USTAR_MAX_SIZE ULONG_MAX
-#else
-#define USTAR_MAX_SIZE 077777777777UL
-#endif
-#if TIME_MAX == 0xFFFFFFFF
-#define USTAR_MAX_MTIME TIME_MAX
-#else
-#define USTAR_MAX_MTIME 077777777777ULL
-#endif
-
-/* writes out the whole block, but only if it is full */
-static void write_if_needed(void)
-{
-	if (offset == BLOCKSIZE) {
-		write_or_die(1, block, BLOCKSIZE);
-		offset = 0;
-	}
-}
-
-/*
- * queues up writes, so that all our write(2) calls write exactly one
- * full block; pads writes to RECORDSIZE
- */
-static void do_write_blocked(const void *data, unsigned long size)
-{
-	const char *buf = data;
-
-	if (offset) {
-		unsigned long chunk = BLOCKSIZE - offset;
-		if (size < chunk)
-			chunk = size;
-		memcpy(block + offset, buf, chunk);
-		size -= chunk;
-		offset += chunk;
-		buf += chunk;
-		write_if_needed();
-	}
-	while (size >= BLOCKSIZE) {
-		write_or_die(1, buf, BLOCKSIZE);
-		size -= BLOCKSIZE;
-		buf += BLOCKSIZE;
-	}
-	if (size) {
-		memcpy(block + offset, buf, size);
-		offset += size;
-	}
-}
-
-static void finish_record(void)
-{
-	unsigned long tail;
-	tail = offset % RECORDSIZE;
-	if (tail)  {
-		memset(block + offset, 0, RECORDSIZE - tail);
-		offset += RECORDSIZE - tail;
-	}
-	write_if_needed();
-}
-
-static void write_blocked(const void *data, unsigned long size)
-{
-	do_write_blocked(data, size);
-	finish_record();
-}
-
-/*
- * The end of tar archives is marked by 2*512 nul bytes and after that
- * follows the rest of the block (if any).
- */
-static void write_trailer(void)
-{
-	int tail = BLOCKSIZE - offset;
-	memset(block + offset, 0, tail);
-	write_or_die(1, block, BLOCKSIZE);
-	if (tail < 2 * RECORDSIZE) {
-		memset(block, 0, offset);
-		write_or_die(1, block, BLOCKSIZE);
-	}
-}
-
-/*
- * queues up writes, so that all our write(2) calls write exactly one
- * full block; pads writes to RECORDSIZE
- */
-static int stream_blocked(struct repository *r, const struct object_id *oid)
-{
-	struct git_istream *st;
-	enum object_type type;
-	unsigned long sz;
-	char buf[BLOCKSIZE];
-	ssize_t readlen;
-
-	st = open_istream(r, oid, &type, &sz, NULL);
-	if (!st)
-		return error(_("cannot stream blob %s"), oid_to_hex(oid));
-	for (;;) {
-		readlen = read_istream(st, buf, sizeof(buf));
-		if (readlen <= 0)
-			break;
-		do_write_blocked(buf, readlen);
-	}
-	close_istream(st);
-	if (!readlen)
-		finish_record();
-	return readlen;
-}
-
-/*
- * pax extended header records have the format "%u %s=%s\n".  %u contains
- * the size of the whole string (including the %u), the first %s is the
- * keyword, the second one is the value.  This function constructs such a
- * string and appends it to a struct strbuf.
- */
-static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword,
-				     const char *value, size_t valuelen)
-{
-	size_t orig_len = sb->len;
-	size_t len, tmp;
-
-	/* "%u %s=%s\n" */
-	len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1;
-	for (tmp = 1; len / 10 >= tmp; tmp *= 10)
-		len++;
-
-	strbuf_grow(sb, len);
-	strbuf_addf(sb, "%"PRIuMAX" %s=", (uintmax_t)len, keyword);
-	strbuf_add(sb, value, valuelen);
-	strbuf_addch(sb, '\n');
-
-	if (len != sb->len - orig_len)
-		BUG("pax extended header length miscalculated as %"PRIuMAX
-		    ", should be %"PRIuMAX,
-		    (uintmax_t)len, (uintmax_t)(sb->len - orig_len));
-}
-
-/*
- * Like strbuf_append_ext_header, but for numeric values.
- */
-static void strbuf_append_ext_header_uint(struct strbuf *sb,
-					  const char *keyword,
-					  uintmax_t value)
-{
-	char buf[40]; /* big enough for 2^128 in decimal, plus NUL */
-	int len;
-
-	len = xsnprintf(buf, sizeof(buf), "%"PRIuMAX, value);
-	strbuf_append_ext_header(sb, keyword, buf, len);
-}
-
-static unsigned int ustar_header_chksum(const struct ustar_header *header)
-{
-	const unsigned char *p = (const unsigned char *)header;
-	unsigned int chksum = 0;
-	while (p < (const unsigned char *)header->chksum)
-		chksum += *p++;
-	chksum += sizeof(header->chksum) * ' ';
-	p += sizeof(header->chksum);
-	while (p < (const unsigned char *)header + sizeof(struct ustar_header))
-		chksum += *p++;
-	return chksum;
-}
-
-static size_t get_path_prefix(const char *path, size_t pathlen, size_t maxlen)
-{
-	size_t i = pathlen;
-	if (i > 1 && path[i - 1] == '/')
-		i--;
-	if (i > maxlen)
-		i = maxlen;
-	do {
-		i--;
-	} while (i > 0 && path[i] != '/');
-	return i;
-}
-
-static void prepare_header(struct archiver_args *args,
-			   struct ustar_header *header,
-			   unsigned int mode, unsigned long size)
-{
-	xsnprintf(header->mode, sizeof(header->mode), "%07o", mode & 07777);
-	xsnprintf(header->size, sizeof(header->size), "%011"PRIoMAX , S_ISREG(mode) ? (uintmax_t)size : (uintmax_t)0);
-	xsnprintf(header->mtime, sizeof(header->mtime), "%011lo", (unsigned long) args->time);
-
-	xsnprintf(header->uid, sizeof(header->uid), "%07o", 0);
-	xsnprintf(header->gid, sizeof(header->gid), "%07o", 0);
-	strlcpy(header->uname, "root", sizeof(header->uname));
-	strlcpy(header->gname, "root", sizeof(header->gname));
-	xsnprintf(header->devmajor, sizeof(header->devmajor), "%07o", 0);
-	xsnprintf(header->devminor, sizeof(header->devminor), "%07o", 0);
-
-	memcpy(header->magic, "ustar", 6);
-	memcpy(header->version, "00", 2);
-
-	xsnprintf(header->chksum, sizeof(header->chksum), "%07o", ustar_header_chksum(header));
-}
-
-static void write_extended_header(struct archiver_args *args,
-				  const struct object_id *oid,
-				  const void *buffer, unsigned long size)
-{
-	struct ustar_header header;
-	unsigned int mode;
-	memset(&header, 0, sizeof(header));
-	*header.typeflag = TYPEFLAG_EXT_HEADER;
-	mode = 0100666;
-	xsnprintf(header.name, sizeof(header.name), "%s.paxheader", oid_to_hex(oid));
-	prepare_header(args, &header, mode, size);
-	write_blocked(&header, sizeof(header));
-	write_blocked(buffer, size);
-}
-
-static int write_tar_entry(struct archiver_args *args,
-			   const struct object_id *oid,
-			   const char *path, size_t pathlen,
-			   unsigned int mode,
-			   void *buffer, unsigned long size)
-{
-	struct ustar_header header;
-	struct strbuf ext_header = STRBUF_INIT;
-	unsigned long size_in_header;
-	int err = 0;
-
-	memset(&header, 0, sizeof(header));
-
-	if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
-		*header.typeflag = TYPEFLAG_DIR;
-		mode = (mode | 0777) & ~tar_umask;
-	} else if (S_ISLNK(mode)) {
-		*header.typeflag = TYPEFLAG_LNK;
-		mode |= 0777;
-	} else if (S_ISREG(mode)) {
-		*header.typeflag = TYPEFLAG_REG;
-		mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask;
-	} else {
-		return error(_("unsupported file mode: 0%o (SHA1: %s)"),
-			     mode, oid_to_hex(oid));
-	}
-	if (pathlen > sizeof(header.name)) {
-		size_t plen = get_path_prefix(path, pathlen,
-					      sizeof(header.prefix));
-		size_t rest = pathlen - plen - 1;
-		if (plen > 0 && rest <= sizeof(header.name)) {
-			memcpy(header.prefix, path, plen);
-			memcpy(header.name, path + plen + 1, rest);
-		} else {
-			xsnprintf(header.name, sizeof(header.name), "%s.data",
-				  oid_to_hex(oid));
-			strbuf_append_ext_header(&ext_header, "path",
-						 path, pathlen);
-		}
-	} else
-		memcpy(header.name, path, pathlen);
-
-	if (S_ISLNK(mode)) {
-		if (size > sizeof(header.linkname)) {
-			xsnprintf(header.linkname, sizeof(header.linkname),
-				  "see %s.paxheader", oid_to_hex(oid));
-			strbuf_append_ext_header(&ext_header, "linkpath",
-			                         buffer, size);
-		} else
-			memcpy(header.linkname, buffer, size);
-	}
-
-	size_in_header = size;
-	if (S_ISREG(mode) && size > USTAR_MAX_SIZE) {
-		size_in_header = 0;
-		strbuf_append_ext_header_uint(&ext_header, "size", size);
-	}
-
-	prepare_header(args, &header, mode, size_in_header);
-
-	if (ext_header.len > 0) {
-		write_extended_header(args, oid, ext_header.buf,
-				      ext_header.len);
-	}
-	strbuf_release(&ext_header);
-	write_blocked(&header, sizeof(header));
-	if (S_ISREG(mode) && size > 0) {
-		if (buffer)
-			write_blocked(buffer, size);
-		else
-			err = stream_blocked(args->repo, oid);
-	}
-	return err;
-}
-
-static void write_global_extended_header(struct archiver_args *args)
-{
-	const struct object_id *oid = args->commit_oid;
-	struct strbuf ext_header = STRBUF_INIT;
-	struct ustar_header header;
-	unsigned int mode;
-
-	if (oid)
-		strbuf_append_ext_header(&ext_header, "comment",
-					 oid_to_hex(oid),
-					 the_hash_algo->hexsz);
-	if (args->time > USTAR_MAX_MTIME) {
-		strbuf_append_ext_header_uint(&ext_header, "mtime",
-					      args->time);
-		args->time = USTAR_MAX_MTIME;
-	}
-
-	if (!ext_header.len)
-		return;
-
-	memset(&header, 0, sizeof(header));
-	*header.typeflag = TYPEFLAG_GLOBAL_HEADER;
-	mode = 0100666;
-	xsnprintf(header.name, sizeof(header.name), "pax_global_header");
-	prepare_header(args, &header, mode, ext_header.len);
-	write_blocked(&header, sizeof(header));
-	write_blocked(ext_header.buf, ext_header.len);
-	strbuf_release(&ext_header);
-}
-
-static struct archiver **tar_filters;
-static int nr_tar_filters;
-static int alloc_tar_filters;
-
-static struct archiver *find_tar_filter(const char *name, size_t len)
-{
-	int i;
-	for (i = 0; i < nr_tar_filters; i++) {
-		struct archiver *ar = tar_filters[i];
-		if (!strncmp(ar->name, name, len) && !ar->name[len])
-			return ar;
-	}
-	return NULL;
-}
-
-static int tar_filter_config(const char *var, const char *value, void *data)
-{
-	struct archiver *ar;
-	const char *name;
-	const char *type;
-	size_t namelen;
-
-	if (parse_config_key(var, "tar", &name, &namelen, &type) < 0 || !name)
-		return 0;
-
-	ar = find_tar_filter(name, namelen);
-	if (!ar) {
-		ar = xcalloc(1, sizeof(*ar));
-		ar->name = xmemdupz(name, namelen);
-		ar->write_archive = write_tar_filter_archive;
-		ar->flags = ARCHIVER_WANT_COMPRESSION_LEVELS;
-		ALLOC_GROW(tar_filters, nr_tar_filters + 1, alloc_tar_filters);
-		tar_filters[nr_tar_filters++] = ar;
-	}
-
-	if (!strcmp(type, "command")) {
-		if (!value)
-			return config_error_nonbool(var);
-		free(ar->data);
-		ar->data = xstrdup(value);
-		return 0;
-	}
-	if (!strcmp(type, "remote")) {
-		if (git_config_bool(var, value))
-			ar->flags |= ARCHIVER_REMOTE;
-		else
-			ar->flags &= ~ARCHIVER_REMOTE;
-		return 0;
-	}
-
-	return 0;
-}
-
-static int git_tar_config(const char *var, const char *value, void *cb)
-{
-	if (!strcmp(var, "tar.umask")) {
-		if (value && !strcmp(value, "user")) {
-			tar_umask = umask(0);
-			umask(tar_umask);
-		} else {
-			tar_umask = git_config_int(var, value);
-		}
-		return 0;
-	}
-
-	return tar_filter_config(var, value, cb);
-}
-
-static int write_tar_archive(const struct archiver *ar,
-			     struct archiver_args *args)
-{
-	int err = 0;
-
-	write_global_extended_header(args);
-	err = write_archive_entries(args, write_tar_entry);
-	if (!err)
-		write_trailer();
-	return err;
-}
-
-static int write_tar_filter_archive(const struct archiver *ar,
-				    struct archiver_args *args)
-{
-	struct strbuf cmd = STRBUF_INIT;
-	struct child_process filter = CHILD_PROCESS_INIT;
-	const char *argv[2];
-	int r;
-
-	if (!ar->data)
-		BUG("tar-filter archiver called with no filter defined");
-
-	strbuf_addstr(&cmd, ar->data);
-	if (args->compression_level >= 0)
-		strbuf_addf(&cmd, " -%d", args->compression_level);
-
-	argv[0] = cmd.buf;
-	argv[1] = NULL;
-	filter.argv = argv;
-	filter.use_shell = 1;
-	filter.in = -1;
-
-	if (start_command(&filter) < 0)
-		die_errno(_("unable to start '%s' filter"), argv[0]);
-	close(1);
-	if (dup2(filter.in, 1) < 0)
-		die_errno(_("unable to redirect descriptor"));
-	close(filter.in);
-
-	r = write_tar_archive(ar, args);
-
-	close(1);
-	if (finish_command(&filter) != 0)
-		die(_("'%s' filter reported error"), argv[0]);
-
-	strbuf_release(&cmd);
-	return r;
-}
-
-static struct archiver tar_archiver = {
-	"tar",
-	write_tar_archive,
-	ARCHIVER_REMOTE
-};
-
-void init_tar_archiver(void)
-{
-	int i;
-	register_archiver(&tar_archiver);
-
-	tar_filter_config("tar.tgz.command", "gzip -cn", NULL);
-	tar_filter_config("tar.tgz.remote", "true", NULL);
-	tar_filter_config("tar.tar.gz.command", "gzip -cn", NULL);
-	tar_filter_config("tar.tar.gz.remote", "true", NULL);
-	git_config(git_tar_config, NULL);
-	for (i = 0; i < nr_tar_filters; i++) {
-		/* omit any filters that never had a command configured */
-		if (tar_filters[i]->data)
-			register_archiver(tar_filters[i]);
-	}
-}