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https://github.com/git/git
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6047b28eb7
Split key function and data structure definitions out of cache.h to new header files and adjust the users. * en/header-split-cleanup: csum-file.h: remove unnecessary inclusion of cache.h write-or-die.h: move declarations for write-or-die.c functions from cache.h treewide: remove cache.h inclusion due to setup.h changes setup.h: move declarations for setup.c functions from cache.h treewide: remove cache.h inclusion due to environment.h changes environment.h: move declarations for environment.c functions from cache.h treewide: remove unnecessary includes of cache.h wrapper.h: move declarations for wrapper.c functions from cache.h path.h: move function declarations for path.c functions from cache.h cache.h: remove expand_user_path() abspath.h: move absolute path functions from cache.h environment: move comment_line_char from cache.h treewide: remove unnecessary cache.h inclusion from several sources treewide: remove unnecessary inclusion of gettext.h treewide: be explicit about dependence on gettext.h treewide: remove unnecessary cache.h inclusion from a few headers
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/*
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* Copyright (c) 2005, 2006 Rene Scharfe
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*/
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#include "cache.h"
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#include "commit.h"
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#include "tar.h"
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#include "builtin.h"
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#include "quote.h"
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#include "wrapper.h"
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static const char builtin_get_tar_commit_id_usage[] =
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"git get-tar-commit-id";
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/* ustar header + extended global header content */
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#define RECORDSIZE (512)
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#define HEADERSIZE (2 * RECORDSIZE)
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int cmd_get_tar_commit_id(int argc, const char **argv UNUSED, const char *prefix)
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{
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char buffer[HEADERSIZE];
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struct ustar_header *header = (struct ustar_header *)buffer;
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char *content = buffer + RECORDSIZE;
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const char *comment;
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ssize_t n;
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long len;
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char *end;
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BUG_ON_NON_EMPTY_PREFIX(prefix);
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if (argc != 1)
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usage(builtin_get_tar_commit_id_usage);
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n = read_in_full(0, buffer, HEADERSIZE);
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if (n < 0)
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die_errno("git get-tar-commit-id: read error");
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if (n != HEADERSIZE)
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die_errno("git get-tar-commit-id: EOF before reading tar header");
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if (header->typeflag[0] != 'g')
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return 1;
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len = strtol(content, &end, 10);
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if (errno == ERANGE || end == content || len < 0)
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return 1;
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if (!skip_prefix(end, " comment=", &comment))
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return 1;
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len -= comment - content;
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if (len < 1 || !(len % 2) ||
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hash_algo_by_length((len - 1) / 2) == GIT_HASH_UNKNOWN)
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return 1;
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if (write_in_full(1, comment, len) < 0)
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die_errno("git get-tar-commit-id: write error");
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return 0;
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}
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