From 5ec6074f0633939fd17d94111d10c6c6b062978c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 11:49:36 +0200 Subject: Adding upstream version 1:2.30.2. Signed-off-by: Daniel Baumann --- builtin/get-tar-commit-id.c | 52 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 builtin/get-tar-commit-id.c (limited to 'builtin/get-tar-commit-id.c') diff --git a/builtin/get-tar-commit-id.c b/builtin/get-tar-commit-id.c new file mode 100644 index 0000000..491af92 --- /dev/null +++ b/builtin/get-tar-commit-id.c @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2005, 2006 Rene Scharfe + */ +#include "cache.h" +#include "commit.h" +#include "tar.h" +#include "builtin.h" +#include "quote.h" + +static const char builtin_get_tar_commit_id_usage[] = +"git get-tar-commit-id"; + +/* ustar header + extended global header content */ +#define RECORDSIZE (512) +#define HEADERSIZE (2 * RECORDSIZE) + +int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix) +{ + char buffer[HEADERSIZE]; + struct ustar_header *header = (struct ustar_header *)buffer; + char *content = buffer + RECORDSIZE; + const char *comment; + ssize_t n; + long len; + char *end; + + if (argc != 1) + usage(builtin_get_tar_commit_id_usage); + + n = read_in_full(0, buffer, HEADERSIZE); + if (n < 0) + die_errno("git get-tar-commit-id: read error"); + if (n != HEADERSIZE) + die_errno("git get-tar-commit-id: EOF before reading tar header"); + if (header->typeflag[0] != 'g') + return 1; + + len = strtol(content, &end, 10); + if (errno == ERANGE || end == content || len < 0) + return 1; + if (!skip_prefix(end, " comment=", &comment)) + return 1; + len -= comment - content; + if (len < 1 || !(len % 2) || + hash_algo_by_length((len - 1) / 2) == GIT_HASH_UNKNOWN) + return 1; + + if (write_in_full(1, comment, len) < 0) + die_errno("git get-tar-commit-id: write error"); + + return 0; +} -- cgit v1.2.3