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52 lines
1.3 KiB
52 lines
1.3 KiB
/* |
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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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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, 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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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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