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fbdd4f6fb4
Introduce a "max_off" field in struct sliding_view, roughly representing a maximum number of bytes that can be read from "file". If it is set to a nonnegative integer, a call to move_window() attempting to put the right endpoint beyond that offset will return an error instead. The idea is to use this when applying Subversion-format deltas to prevent reads past the end of the preimage (which has known length). Without such a check, corrupt deltas would cause svn-fe to block indefinitely when data in the input pipe is exhausted. Inspired-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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* test-svn-fe: Code to exercise the svn import lib
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*/
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#include "git-compat-util.h"
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#include "vcs-svn/svndump.h"
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#include "vcs-svn/svndiff.h"
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#include "vcs-svn/sliding_window.h"
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#include "vcs-svn/line_buffer.h"
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static const char test_svnfe_usage[] =
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"test-svn-fe (<dumpfile> | [-d] <preimage> <delta> <len>)";
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static int apply_delta(int argc, char *argv[])
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{
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struct line_buffer preimage = LINE_BUFFER_INIT;
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struct line_buffer delta = LINE_BUFFER_INIT;
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struct sliding_view preimage_view = SLIDING_VIEW_INIT(&preimage, -1);
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if (argc != 5)
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usage(test_svnfe_usage);
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if (buffer_init(&preimage, argv[2]))
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die_errno("cannot open preimage");
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if (buffer_init(&delta, argv[3]))
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die_errno("cannot open delta");
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if (svndiff0_apply(&delta, (off_t) strtoull(argv[4], NULL, 0),
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&preimage_view, stdout))
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return 1;
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if (buffer_deinit(&preimage))
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die_errno("cannot close preimage");
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if (buffer_deinit(&delta))
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die_errno("cannot close delta");
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buffer_reset(&preimage);
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strbuf_release(&preimage_view.buf);
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buffer_reset(&delta);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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if (argc == 2) {
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if (svndump_init(argv[1]))
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return 1;
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svndump_read(NULL);
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svndump_deinit();
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svndump_reset();
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return 0;
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}
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if (argc >= 2 && !strcmp(argv[1], "-d"))
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return apply_delta(argc, argv);
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usage(test_svnfe_usage);
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}
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