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* For efficiency: md5 integrated into nix.
* Command `nix ensure' which is like `nix getpkg' except that if the has refers to a run action it will just ensure that the imports are there. * Command `nix closure' to print out the closure of the set of descriptors under the import relation, starting at a set of roots. This can be used for garbage collection (e.g., given a list of `activated' packages, we can delete all packages not reachable from those). * Command `nix graph' to print out a Dot graph of the dependency graph. * `nix-addroot' adds a root for the (unimplemented) garbage collector.
This commit is contained in:
Eelco Dolstra
parent
eeab86e0ac
commit
73c53935d0
12
src/Makefile
12
src/Makefile
@ -2,8 +2,16 @@ all: nix nix-instantiate
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SYSTEM = $(shell ./config.guess)
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nix: nix.cc
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g++ -g -Wall -o nix nix.cc -ldb_cxx-4 -DSYSTEM=\"$(SYSTEM)\"
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nix: nix.o md5.o
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g++ -g -o $@ $^ -ldb_cxx-4
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%.o: %.cc
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g++ -g -Wall -o $@ -c $< -DSYSTEM=\"$(SYSTEM)\"
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%.o: %.c
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gcc -g -Wall -o $@ -c $< -DSYSTEM=\"$(SYSTEM)\"
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md5.o: md5.c md5.h
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nix-instantiate: nix-instantiate.in
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sed "s/@SYSTEM@/$(SYSTEM)/" < $^ > $@
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435
src/md5.c
Normal file
435
src/md5.c
Normal file
@ -0,0 +1,435 @@
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/* Functions to compute MD5 message digest of files or memory blocks.
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according to the definition of MD5 in RFC 1321 from April 1992.
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Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include "md5.h"
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#ifdef WORDS_BIGENDIAN
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# define SWAP(n) \
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(((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
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#else
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# define SWAP(n) (n)
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#endif
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/* This array contains the bytes used to pad the buffer to the next
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64-byte boundary. (RFC 1321, 3.1: Step 1) */
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static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
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/* Initialize structure containing state of computation.
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(RFC 1321, 3.3: Step 3) */
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void
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md5_init_ctx (ctx)
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struct md5_ctx *ctx;
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{
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ctx->A = 0x67452301;
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ctx->B = 0xefcdab89;
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ctx->C = 0x98badcfe;
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ctx->D = 0x10325476;
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ctx->total[0] = ctx->total[1] = 0;
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ctx->buflen = 0;
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}
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/* Put result from CTX in first 16 bytes following RESBUF. The result
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must be in little endian byte order.
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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32 bits value. */
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void *
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md5_read_ctx (ctx, resbuf)
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const struct md5_ctx *ctx;
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void *resbuf;
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{
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((md5_uint32 *) resbuf)[0] = SWAP (ctx->A);
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((md5_uint32 *) resbuf)[1] = SWAP (ctx->B);
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((md5_uint32 *) resbuf)[2] = SWAP (ctx->C);
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((md5_uint32 *) resbuf)[3] = SWAP (ctx->D);
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return resbuf;
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}
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/* Process the remaining bytes in the internal buffer and the usual
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prolog according to the standard and write the result to RESBUF.
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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32 bits value. */
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void *
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md5_finish_ctx (ctx, resbuf)
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struct md5_ctx *ctx;
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void *resbuf;
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{
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/* Take yet unprocessed bytes into account. */
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md5_uint32 bytes = ctx->buflen;
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size_t pad;
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/* Now count remaining bytes. */
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ctx->total[0] += bytes;
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if (ctx->total[0] < bytes)
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++ctx->total[1];
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pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes;
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memcpy (&ctx->buffer[bytes], fillbuf, pad);
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/* Put the 64-bit file length in *bits* at the end of the buffer. */
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*(md5_uint32 *) &ctx->buffer[bytes + pad] = SWAP (ctx->total[0] << 3);
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*(md5_uint32 *) &ctx->buffer[bytes + pad + 4] = SWAP ((ctx->total[1] << 3) |
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(ctx->total[0] >> 29));
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/* Process last bytes. */
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md5_process_block (ctx->buffer, bytes + pad + 8, ctx);
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return md5_read_ctx (ctx, resbuf);
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}
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/* Compute MD5 message digest for bytes read from STREAM. The
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resulting message digest number will be written into the 16 bytes
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beginning at RESBLOCK. */
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int
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md5_stream (stream, resblock)
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FILE *stream;
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void *resblock;
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{
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/* Important: BLOCKSIZE must be a multiple of 64. */
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#define BLOCKSIZE 4096
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struct md5_ctx ctx;
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char buffer[BLOCKSIZE + 72];
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size_t sum;
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/* Initialize the computation context. */
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md5_init_ctx (&ctx);
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/* Iterate over full file contents. */
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while (1)
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{
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/* We read the file in blocks of BLOCKSIZE bytes. One call of the
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computation function processes the whole buffer so that with the
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next round of the loop another block can be read. */
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size_t n;
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sum = 0;
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/* Read block. Take care for partial reads. */
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do
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{
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n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
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sum += n;
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}
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while (sum < BLOCKSIZE && n != 0);
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if (n == 0 && ferror (stream))
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return 1;
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/* If end of file is reached, end the loop. */
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if (n == 0)
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break;
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/* Process buffer with BLOCKSIZE bytes. Note that
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BLOCKSIZE % 64 == 0
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*/
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md5_process_block (buffer, BLOCKSIZE, &ctx);
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}
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/* Add the last bytes if necessary. */
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if (sum > 0)
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md5_process_bytes (buffer, sum, &ctx);
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/* Construct result in desired memory. */
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md5_finish_ctx (&ctx, resblock);
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return 0;
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}
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/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
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result is always in little endian byte order, so that a byte-wise
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output yields to the wanted ASCII representation of the message
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digest. */
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void *
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md5_buffer (buffer, len, resblock)
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const char *buffer;
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size_t len;
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void *resblock;
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{
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struct md5_ctx ctx;
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/* Initialize the computation context. */
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md5_init_ctx (&ctx);
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/* Process whole buffer but last len % 64 bytes. */
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md5_process_bytes (buffer, len, &ctx);
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/* Put result in desired memory area. */
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return md5_finish_ctx (&ctx, resblock);
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}
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void
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md5_process_bytes (buffer, len, ctx)
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const void *buffer;
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size_t len;
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struct md5_ctx *ctx;
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{
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/* When we already have some bits in our internal buffer concatenate
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both inputs first. */
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if (ctx->buflen != 0)
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{
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size_t left_over = ctx->buflen;
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size_t add = 128 - left_over > len ? len : 128 - left_over;
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memcpy (&ctx->buffer[left_over], buffer, add);
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ctx->buflen += add;
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if (ctx->buflen > 64)
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{
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md5_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
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ctx->buflen &= 63;
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/* The regions in the following copy operation cannot overlap. */
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memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~63],
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ctx->buflen);
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}
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buffer = (const char *) buffer + add;
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len -= add;
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}
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/* Process available complete blocks. */
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if (len >= 64)
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{
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#if !_STRING_ARCH_unaligned
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/* To check alignment gcc has an appropriate operator. Other
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compilers don't. */
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# if __GNUC__ >= 2
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# define UNALIGNED_P(p) (((md5_uintptr) p) % __alignof__ (md5_uint32) != 0)
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# else
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# define UNALIGNED_P(p) (((md5_uintptr) p) % sizeof (md5_uint32) != 0)
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# endif
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if (UNALIGNED_P (buffer))
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while (len > 64)
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{
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md5_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
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buffer = (const char *) buffer + 64;
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len -= 64;
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}
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else
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#endif
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{
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md5_process_block (buffer, len & ~63, ctx);
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buffer = (const char *) buffer + (len & ~63);
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len &= 63;
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}
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}
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/* Move remaining bytes in internal buffer. */
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if (len > 0)
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{
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size_t left_over = ctx->buflen;
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memcpy (&ctx->buffer[left_over], buffer, len);
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left_over += len;
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if (left_over >= 64)
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{
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md5_process_block (ctx->buffer, 64, ctx);
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left_over -= 64;
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memcpy (ctx->buffer, &ctx->buffer[64], left_over);
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}
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ctx->buflen = left_over;
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}
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}
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/* These are the four functions used in the four steps of the MD5 algorithm
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and defined in the RFC 1321. The first function is a little bit optimized
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(as found in Colin Plumbs public domain implementation). */
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/* #define FF(b, c, d) ((b & c) | (~b & d)) */
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#define FF(b, c, d) (d ^ (b & (c ^ d)))
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#define FG(b, c, d) FF (d, b, c)
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#define FH(b, c, d) (b ^ c ^ d)
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#define FI(b, c, d) (c ^ (b | ~d))
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/* Process LEN bytes of BUFFER, accumulating context into CTX.
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It is assumed that LEN % 64 == 0. */
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void
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md5_process_block (buffer, len, ctx)
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const void *buffer;
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size_t len;
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struct md5_ctx *ctx;
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{
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md5_uint32 correct_words[16];
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const md5_uint32 *words = buffer;
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size_t nwords = len / sizeof (md5_uint32);
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const md5_uint32 *endp = words + nwords;
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md5_uint32 A = ctx->A;
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md5_uint32 B = ctx->B;
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md5_uint32 C = ctx->C;
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md5_uint32 D = ctx->D;
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/* First increment the byte count. RFC 1321 specifies the possible
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length of the file up to 2^64 bits. Here we only compute the
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number of bytes. Do a double word increment. */
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ctx->total[0] += len;
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if (ctx->total[0] < len)
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++ctx->total[1];
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/* Process all bytes in the buffer with 64 bytes in each round of
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the loop. */
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while (words < endp)
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{
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md5_uint32 *cwp = correct_words;
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md5_uint32 A_save = A;
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md5_uint32 B_save = B;
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md5_uint32 C_save = C;
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md5_uint32 D_save = D;
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/* First round: using the given function, the context and a constant
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the next context is computed. Because the algorithms processing
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unit is a 32-bit word and it is determined to work on words in
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little endian byte order we perhaps have to change the byte order
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before the computation. To reduce the work for the next steps
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we store the swapped words in the array CORRECT_WORDS. */
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#define OP(a, b, c, d, s, T) \
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do \
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{ \
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a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T; \
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++words; \
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CYCLIC (a, s); \
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a += b; \
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} \
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while (0)
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/* It is unfortunate that C does not provide an operator for
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cyclic rotation. Hope the C compiler is smart enough. */
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#define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s)))
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/* Before we start, one word to the strange constants.
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They are defined in RFC 1321 as
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T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
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*/
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/* Round 1. */
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OP (A, B, C, D, 7, 0xd76aa478);
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OP (D, A, B, C, 12, 0xe8c7b756);
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OP (C, D, A, B, 17, 0x242070db);
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OP (B, C, D, A, 22, 0xc1bdceee);
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OP (A, B, C, D, 7, 0xf57c0faf);
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OP (D, A, B, C, 12, 0x4787c62a);
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OP (C, D, A, B, 17, 0xa8304613);
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OP (B, C, D, A, 22, 0xfd469501);
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OP (A, B, C, D, 7, 0x698098d8);
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OP (D, A, B, C, 12, 0x8b44f7af);
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OP (C, D, A, B, 17, 0xffff5bb1);
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OP (B, C, D, A, 22, 0x895cd7be);
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OP (A, B, C, D, 7, 0x6b901122);
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OP (D, A, B, C, 12, 0xfd987193);
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OP (C, D, A, B, 17, 0xa679438e);
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OP (B, C, D, A, 22, 0x49b40821);
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/* For the second to fourth round we have the possibly swapped words
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in CORRECT_WORDS. Redefine the macro to take an additional first
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argument specifying the function to use. */
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#undef OP
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#define OP(f, a, b, c, d, k, s, T) \
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do \
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{ \
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a += f (b, c, d) + correct_words[k] + T; \
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CYCLIC (a, s); \
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a += b; \
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} \
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while (0)
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/* Round 2. */
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OP (FG, A, B, C, D, 1, 5, 0xf61e2562);
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OP (FG, D, A, B, C, 6, 9, 0xc040b340);
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OP (FG, C, D, A, B, 11, 14, 0x265e5a51);
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OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
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OP (FG, A, B, C, D, 5, 5, 0xd62f105d);
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OP (FG, D, A, B, C, 10, 9, 0x02441453);
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OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);
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OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
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OP (FG, A, B, C, D, 9, 5, 0x21e1cde6);
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OP (FG, D, A, B, C, 14, 9, 0xc33707d6);
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OP (FG, C, D, A, B, 3, 14, 0xf4d50d87);
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OP (FG, B, C, D, A, 8, 20, 0x455a14ed);
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OP (FG, A, B, C, D, 13, 5, 0xa9e3e905);
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OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8);
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OP (FG, C, D, A, B, 7, 14, 0x676f02d9);
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OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
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/* Round 3. */
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OP (FH, A, B, C, D, 5, 4, 0xfffa3942);
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OP (FH, D, A, B, C, 8, 11, 0x8771f681);
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OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
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OP (FH, B, C, D, A, 14, 23, 0xfde5380c);
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OP (FH, A, B, C, D, 1, 4, 0xa4beea44);
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OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9);
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OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60);
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OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);
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OP (FH, A, B, C, D, 13, 4, 0x289b7ec6);
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OP (FH, D, A, B, C, 0, 11, 0xeaa127fa);
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OP (FH, C, D, A, B, 3, 16, 0xd4ef3085);
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OP (FH, B, C, D, A, 6, 23, 0x04881d05);
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OP (FH, A, B, C, D, 9, 4, 0xd9d4d039);
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OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
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OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);
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OP (FH, B, C, D, A, 2, 23, 0xc4ac5665);
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||||
/* Round 4. */
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OP (FI, A, B, C, D, 0, 6, 0xf4292244);
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OP (FI, D, A, B, C, 7, 10, 0x432aff97);
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OP (FI, C, D, A, B, 14, 15, 0xab9423a7);
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OP (FI, B, C, D, A, 5, 21, 0xfc93a039);
|
||||
OP (FI, A, B, C, D, 12, 6, 0x655b59c3);
|
||||
OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92);
|
||||
OP (FI, C, D, A, B, 10, 15, 0xffeff47d);
|
||||
OP (FI, B, C, D, A, 1, 21, 0x85845dd1);
|
||||
OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f);
|
||||
OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
|
||||
OP (FI, C, D, A, B, 6, 15, 0xa3014314);
|
||||
OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);
|
||||
OP (FI, A, B, C, D, 4, 6, 0xf7537e82);
|
||||
OP (FI, D, A, B, C, 11, 10, 0xbd3af235);
|
||||
OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
|
||||
OP (FI, B, C, D, A, 9, 21, 0xeb86d391);
|
||||
|
||||
/* Add the starting values of the context. */
|
||||
A += A_save;
|
||||
B += B_save;
|
||||
C += C_save;
|
||||
D += D_save;
|
||||
}
|
||||
|
||||
/* Put checksum in context given as argument. */
|
||||
ctx->A = A;
|
||||
ctx->B = B;
|
||||
ctx->C = C;
|
||||
ctx->D = D;
|
||||
}
|
||||
151
src/md5.h
Normal file
151
src/md5.h
Normal file
@ -0,0 +1,151 @@
|
||||
/* Declaration of functions and data types used for MD5 sum computing
|
||||
library functions.
|
||||
Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#ifndef _MD5_H
|
||||
#define _MD5_H 1
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
#if defined HAVE_LIMITS_H || _LIBC
|
||||
# include <limits.h>
|
||||
#endif
|
||||
|
||||
/* The following contortions are an attempt to use the C preprocessor
|
||||
to determine an unsigned integral type that is 32 bits wide. An
|
||||
alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
|
||||
doing that would require that the configure script compile and *run*
|
||||
the resulting executable. Locally running cross-compiled executables
|
||||
is usually not possible. */
|
||||
|
||||
#ifdef _LIBC
|
||||
# include <stdint.h>
|
||||
typedef uint32_t md5_uint32;
|
||||
typedef uintptr_t md5_uintptr;
|
||||
#else
|
||||
# if defined __STDC__ && __STDC__
|
||||
# define UINT_MAX_32_BITS 4294967295U
|
||||
# else
|
||||
# define UINT_MAX_32_BITS 0xFFFFFFFF
|
||||
# endif
|
||||
|
||||
/* If UINT_MAX isn't defined, assume it's a 32-bit type.
|
||||
This should be valid for all systems GNU cares about because
|
||||
that doesn't include 16-bit systems, and only modern systems
|
||||
(that certainly have <limits.h>) have 64+-bit integral types. */
|
||||
|
||||
# ifndef UINT_MAX
|
||||
# define UINT_MAX UINT_MAX_32_BITS
|
||||
# endif
|
||||
|
||||
# if UINT_MAX == UINT_MAX_32_BITS
|
||||
typedef unsigned int md5_uint32;
|
||||
# else
|
||||
# if USHRT_MAX == UINT_MAX_32_BITS
|
||||
typedef unsigned short md5_uint32;
|
||||
# else
|
||||
# if ULONG_MAX == UINT_MAX_32_BITS
|
||||
typedef unsigned long md5_uint32;
|
||||
# else
|
||||
/* The following line is intended to evoke an error.
|
||||
Using #error is not portable enough. */
|
||||
"Cannot determine unsigned 32-bit data type."
|
||||
# endif
|
||||
# endif
|
||||
# endif
|
||||
/* We have to make a guess about the integer type equivalent in size
|
||||
to pointers which should always be correct. */
|
||||
typedef unsigned long int md5_uintptr;
|
||||
#endif
|
||||
|
||||
#undef __P
|
||||
#if defined (__STDC__) && __STDC__
|
||||
# define __P(x) x
|
||||
#else
|
||||
# define __P(x) ()
|
||||
#endif
|
||||
|
||||
/* Structure to save state of computation between the single steps. */
|
||||
struct md5_ctx
|
||||
{
|
||||
md5_uint32 A;
|
||||
md5_uint32 B;
|
||||
md5_uint32 C;
|
||||
md5_uint32 D;
|
||||
|
||||
md5_uint32 total[2];
|
||||
md5_uint32 buflen;
|
||||
char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
|
||||
};
|
||||
|
||||
/*
|
||||
* The following three functions are build up the low level used in
|
||||
* the functions `md5_stream' and `md5_buffer'.
|
||||
*/
|
||||
|
||||
/* Initialize structure containing state of computation.
|
||||
(RFC 1321, 3.3: Step 3) */
|
||||
extern void md5_init_ctx __P ((struct md5_ctx *ctx));
|
||||
|
||||
/* Starting with the result of former calls of this function (or the
|
||||
initialization function update the context for the next LEN bytes
|
||||
starting at BUFFER.
|
||||
It is necessary that LEN is a multiple of 64!!! */
|
||||
extern void md5_process_block __P ((const void *buffer, size_t len,
|
||||
struct md5_ctx *ctx));
|
||||
|
||||
/* Starting with the result of former calls of this function (or the
|
||||
initialization function update the context for the next LEN bytes
|
||||
starting at BUFFER.
|
||||
It is NOT required that LEN is a multiple of 64. */
|
||||
extern void md5_process_bytes __P ((const void *buffer, size_t len,
|
||||
struct md5_ctx *ctx));
|
||||
|
||||
/* Process the remaining bytes in the buffer and put result from CTX
|
||||
in first 16 bytes following RESBUF. The result is always in little
|
||||
endian byte order, so that a byte-wise output yields to the wanted
|
||||
ASCII representation of the message digest.
|
||||
|
||||
IMPORTANT: On some systems it is required that RESBUF is correctly
|
||||
aligned for a 32 bits value. */
|
||||
extern void *md5_finish_ctx __P ((struct md5_ctx *ctx, void *resbuf));
|
||||
|
||||
|
||||
/* Put result from CTX in first 16 bytes following RESBUF. The result is
|
||||
always in little endian byte order, so that a byte-wise output yields
|
||||
to the wanted ASCII representation of the message digest.
|
||||
|
||||
IMPORTANT: On some systems it is required that RESBUF is correctly
|
||||
aligned for a 32 bits value. */
|
||||
extern void *md5_read_ctx __P ((const struct md5_ctx *ctx, void *resbuf));
|
||||
|
||||
|
||||
/* Compute MD5 message digest for bytes read from STREAM. The
|
||||
resulting message digest number will be written into the 16 bytes
|
||||
beginning at RESBLOCK. */
|
||||
extern int md5_stream __P ((FILE *stream, void *resblock));
|
||||
|
||||
/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
|
||||
result is always in little endian byte order, so that a byte-wise
|
||||
output yields to the wanted ASCII representation of the message
|
||||
digest. */
|
||||
extern void *md5_buffer __P ((const char *buffer, size_t len,
|
||||
void *resblock));
|
||||
|
||||
#endif /* md5.h */
|
||||
18
src/nix-addroot
Executable file
18
src/nix-addroot
Executable file
@ -0,0 +1,18 @@
|
||||
#! /bin/sh
|
||||
|
||||
ROOTLIST=~/.nixroots
|
||||
|
||||
if ! test -f $ROOTLIST; then
|
||||
touch $ROOTLIST
|
||||
fi
|
||||
|
||||
for i in $*; do
|
||||
if nix ensure $i > /dev/null; then
|
||||
if grep -q $i $ROOTLIST; then
|
||||
echo $i already is a root
|
||||
else
|
||||
echo adding root $i
|
||||
echo $i >> $ROOTLIST
|
||||
fi
|
||||
fi
|
||||
done
|
||||
256
src/nix.cc
256
src/nix.cc
@ -4,6 +4,8 @@
|
||||
#include <string>
|
||||
#include <sstream>
|
||||
#include <list>
|
||||
#include <vector>
|
||||
#include <set>
|
||||
#include <map>
|
||||
#include <cstdio>
|
||||
|
||||
@ -14,6 +16,10 @@
|
||||
|
||||
#include <db4/db_cxx.h>
|
||||
|
||||
extern "C" {
|
||||
#include "md5.h"
|
||||
}
|
||||
|
||||
using namespace std;
|
||||
|
||||
|
||||
@ -146,8 +152,20 @@ void enumDB(const string & dbname, DBPairs & contents)
|
||||
}
|
||||
|
||||
|
||||
string printHash(unsigned char * buf)
|
||||
{
|
||||
ostringstream str;
|
||||
for (int i = 0; i < 16; i++) {
|
||||
str.fill('0');
|
||||
str.width(2);
|
||||
str << hex << (int) buf[i];
|
||||
}
|
||||
return str.str();
|
||||
}
|
||||
|
||||
|
||||
/* Verify that a reference is valid (that is, is a MD5 hash code). */
|
||||
void checkRef(const string & s)
|
||||
void checkHash(const string & s)
|
||||
{
|
||||
string err = "invalid reference: " + s;
|
||||
if (s.length() != 32)
|
||||
@ -162,31 +180,36 @@ void checkRef(const string & s)
|
||||
|
||||
|
||||
/* Compute the MD5 hash of a file. */
|
||||
string makeRef(string filename)
|
||||
string hashFile(string filename)
|
||||
{
|
||||
char hash[33];
|
||||
|
||||
FILE * pipe = popen(("md5sum " + filename + " 2> /dev/null").c_str(), "r");
|
||||
if (!pipe) throw BadRefError("cannot execute md5sum");
|
||||
|
||||
if (fread(hash, 32, 1, pipe) != 1)
|
||||
throw BadRefError("cannot read hash from md5sum of " + filename);
|
||||
hash[32] = 0;
|
||||
|
||||
pclose(pipe);
|
||||
|
||||
checkRef(hash);
|
||||
return hash;
|
||||
unsigned char hash[16];
|
||||
FILE * file = fopen(filename.c_str(), "rb");
|
||||
if (!file)
|
||||
throw BadRefError("file `" + filename + "' does not exist");
|
||||
int err = md5_stream(file, hash);
|
||||
fclose(file);
|
||||
if (err) throw BadRefError("cannot hash file");
|
||||
return printHash(hash);
|
||||
}
|
||||
|
||||
|
||||
typedef pair<string, string> Param;
|
||||
typedef list<Param> Params;
|
||||
typedef map<string, string> Params;
|
||||
|
||||
|
||||
void readPkgDescr(const string & pkgfile,
|
||||
void readPkgDescr(const string & hash,
|
||||
Params & pkgImports, Params & fileImports, Params & arguments)
|
||||
{
|
||||
string pkgfile;
|
||||
|
||||
if (!queryDB(dbRefs, hash, pkgfile))
|
||||
throw Error("unknown package " + hash);
|
||||
|
||||
// cerr << "reading information about " + hash + " from " + pkgfile + "\n";
|
||||
|
||||
/* Verify that the file hasn't changed. !!! race */
|
||||
if (hashFile(pkgfile) != hash)
|
||||
throw Error("file " + pkgfile + " is stale");
|
||||
|
||||
ifstream file;
|
||||
file.exceptions(ios::badbit);
|
||||
file.open(pkgfile.c_str());
|
||||
@ -206,13 +229,13 @@ void readPkgDescr(const string & pkgfile,
|
||||
str >> name >> op >> ref;
|
||||
|
||||
if (op == "<-") {
|
||||
checkRef(ref);
|
||||
pkgImports.push_back(Param(name, ref));
|
||||
checkHash(ref);
|
||||
pkgImports[name] = ref;
|
||||
} else if (op == "=") {
|
||||
checkRef(ref);
|
||||
fileImports.push_back(Param(name, ref));
|
||||
checkHash(ref);
|
||||
fileImports[name] = ref;
|
||||
} else if (op == ":")
|
||||
arguments.push_back(Param(name, ref));
|
||||
arguments[name] = ref;
|
||||
else throw Error("invalid operator " + op);
|
||||
}
|
||||
}
|
||||
@ -226,20 +249,9 @@ typedef map<string, string> Environment;
|
||||
|
||||
void fetchDeps(string hash, Environment & env)
|
||||
{
|
||||
string pkgfile;
|
||||
|
||||
if (!queryDB(dbRefs, hash, pkgfile))
|
||||
throw Error("unknown package " + hash);
|
||||
|
||||
cerr << "reading information about " + hash + " from " + pkgfile + "\n";
|
||||
|
||||
/* Verify that the file hasn't changed. !!! race */
|
||||
if (makeRef(pkgfile) != hash)
|
||||
throw Error("file " + pkgfile + " is stale");
|
||||
|
||||
/* Read the package description file. */
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(pkgfile, pkgImports, fileImports, arguments);
|
||||
readPkgDescr(hash, pkgImports, fileImports, arguments);
|
||||
|
||||
/* Recursively fetch all the dependencies, filling in the
|
||||
environment as we go along. */
|
||||
@ -264,7 +276,7 @@ void fetchDeps(string hash, Environment & env)
|
||||
if (!queryDB(dbRefs, it->second, file))
|
||||
throw Error("unknown file " + it->second);
|
||||
|
||||
if (makeRef(file) != it->second)
|
||||
if (hashFile(file) != it->second)
|
||||
throw Error("file " + file + " is stale");
|
||||
|
||||
env[it->first] = file;
|
||||
@ -374,7 +386,7 @@ void installPkg(string hash)
|
||||
string getPkg(string hash)
|
||||
{
|
||||
string path;
|
||||
checkRef(hash);
|
||||
checkHash(hash);
|
||||
while (!queryDB(dbInstPkgs, hash, path))
|
||||
installPkg(hash);
|
||||
return path;
|
||||
@ -434,6 +446,20 @@ void runPkg(string hash)
|
||||
}
|
||||
|
||||
|
||||
void ensurePkg(string hash)
|
||||
{
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(hash, pkgImports, fileImports, arguments);
|
||||
|
||||
if (fileImports.find("build") != fileImports.end())
|
||||
getPkg(hash);
|
||||
else if (fileImports.find("run") != fileImports.end()) {
|
||||
Environment env;
|
||||
fetchDeps(hash, env);
|
||||
} else throw Error("invalid descriptor");
|
||||
}
|
||||
|
||||
|
||||
string absPath(string filename)
|
||||
{
|
||||
if (filename[0] != '/') {
|
||||
@ -450,14 +476,14 @@ string absPath(string filename)
|
||||
void registerFile(string filename)
|
||||
{
|
||||
filename = absPath(filename);
|
||||
setDB(dbRefs, makeRef(filename), filename);
|
||||
setDB(dbRefs, hashFile(filename), filename);
|
||||
}
|
||||
|
||||
|
||||
/* This is primarily used for bootstrapping. */
|
||||
void registerInstalledPkg(string hash, string path)
|
||||
{
|
||||
checkRef(hash);
|
||||
checkHash(hash);
|
||||
if (path == "")
|
||||
delDB(dbInstPkgs, hash);
|
||||
else
|
||||
@ -483,8 +509,10 @@ void verifyDB()
|
||||
it != fileRefs.end(); it++)
|
||||
{
|
||||
try {
|
||||
if (makeRef(it->second) != it->first)
|
||||
if (hashFile(it->second) != it->first) {
|
||||
cerr << "file " << it->second << " has changed\n";
|
||||
delDB(dbRefs, it->first);
|
||||
}
|
||||
} catch (BadRefError e) { /* !!! better error check */
|
||||
cerr << "file " << it->second << " has disappeared\n";
|
||||
delDB(dbRefs, it->first);
|
||||
@ -519,48 +547,136 @@ void listInstalledPkgs()
|
||||
|
||||
for (DBPairs::iterator it = instPkgs.begin();
|
||||
it != instPkgs.end(); it++)
|
||||
cout << it->first << endl;
|
||||
}
|
||||
|
||||
|
||||
void printInfo(vector<string> hashes)
|
||||
{
|
||||
string descr;
|
||||
if (!queryDB(dbRefs, it->first, descr))
|
||||
descr = "descriptor missing";
|
||||
cout << it->first << " " << descr << endl;
|
||||
for (vector<string>::iterator it = hashes.begin();
|
||||
it != hashes.end(); it++)
|
||||
{
|
||||
try {
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(*it, pkgImports, fileImports, arguments);
|
||||
cout << *it << " " << getFromEnv(arguments, "id") << endl;
|
||||
} catch (Error & e) {
|
||||
cout << *it << " (descriptor missing)\n";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void run(int argc, char * * argv)
|
||||
void computeClosure(const vector<string> & rootHashes,
|
||||
set<string> & result)
|
||||
{
|
||||
list<string> workList(rootHashes.begin(), rootHashes.end());
|
||||
set<string> doneSet;
|
||||
|
||||
while (!workList.empty()) {
|
||||
string hash = workList.front();
|
||||
workList.pop_front();
|
||||
|
||||
if (doneSet.find(hash) == doneSet.end()) {
|
||||
doneSet.insert(hash);
|
||||
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(hash, pkgImports, fileImports, arguments);
|
||||
|
||||
for (Params::iterator it = pkgImports.begin();
|
||||
it != pkgImports.end(); it++)
|
||||
workList.push_back(it->second);
|
||||
}
|
||||
}
|
||||
|
||||
result = doneSet;
|
||||
}
|
||||
|
||||
|
||||
void printClosure(const vector<string> & rootHashes)
|
||||
{
|
||||
set<string> allHashes;
|
||||
computeClosure(rootHashes, allHashes);
|
||||
for (set<string>::iterator it = allHashes.begin();
|
||||
it != allHashes.end(); it++)
|
||||
cout << *it << endl;
|
||||
}
|
||||
|
||||
|
||||
string dotQuote(const string & s)
|
||||
{
|
||||
return "\"" + s + "\"";
|
||||
}
|
||||
|
||||
|
||||
void printGraph(vector<string> rootHashes)
|
||||
{
|
||||
set<string> allHashes;
|
||||
computeClosure(rootHashes, allHashes);
|
||||
|
||||
cout << "digraph G {\n";
|
||||
|
||||
for (set<string>::iterator it = allHashes.begin();
|
||||
it != allHashes.end(); it++)
|
||||
{
|
||||
Params pkgImports, fileImports, arguments;
|
||||
readPkgDescr(*it, pkgImports, fileImports, arguments);
|
||||
|
||||
cout << dotQuote(*it) << "[label = \""
|
||||
<< getFromEnv(arguments, "id")
|
||||
<< "\"];\n";
|
||||
|
||||
for (Params::iterator it2 = pkgImports.begin();
|
||||
it2 != pkgImports.end(); it2++)
|
||||
cout << dotQuote(it2->second) << " -> "
|
||||
<< dotQuote(*it) << ";\n";
|
||||
}
|
||||
|
||||
cout << "}\n";
|
||||
}
|
||||
|
||||
|
||||
void run(vector<string> args)
|
||||
{
|
||||
UsageError argcError("wrong number of arguments");
|
||||
string cmd;
|
||||
|
||||
if (argc < 1)
|
||||
throw UsageError("no command specified");
|
||||
if (args.size() < 1) throw UsageError("no command specified");
|
||||
|
||||
cmd = argv[0];
|
||||
argc--, argv++;
|
||||
cmd = args[0];
|
||||
args.erase(args.begin()); // O(n)
|
||||
|
||||
if (cmd == "init") {
|
||||
if (argc != 0) throw argcError;
|
||||
if (args.size() != 0) throw argcError;
|
||||
initDB();
|
||||
} else if (cmd == "verify") {
|
||||
if (argc != 0) throw argcError;
|
||||
if (args.size() != 0) throw argcError;
|
||||
verifyDB();
|
||||
} else if (cmd == "getpkg") {
|
||||
if (argc != 1) throw argcError;
|
||||
string path = getPkg(argv[0]);
|
||||
if (args.size() != 1) throw argcError;
|
||||
string path = getPkg(args[0]);
|
||||
cout << path << endl;
|
||||
} else if (cmd == "run") {
|
||||
if (argc != 1) throw argcError;
|
||||
runPkg(argv[0]);
|
||||
if (args.size() != 1) throw argcError;
|
||||
runPkg(args[0]);
|
||||
} else if (cmd == "ensure") {
|
||||
if (args.size() != 1) throw argcError;
|
||||
ensurePkg(args[0]);
|
||||
} else if (cmd == "regfile") {
|
||||
if (argc != 1) throw argcError;
|
||||
registerFile(argv[0]);
|
||||
if (args.size() != 1) throw argcError;
|
||||
registerFile(args[0]);
|
||||
} else if (cmd == "reginst") {
|
||||
if (argc != 2) throw argcError;
|
||||
registerInstalledPkg(argv[0], argv[1]);
|
||||
if (args.size() != 2) throw argcError;
|
||||
registerInstalledPkg(args[0], args[1]);
|
||||
} else if (cmd == "listinst") {
|
||||
if (argc != 0) throw argcError;
|
||||
if (args.size() != 0) throw argcError;
|
||||
listInstalledPkgs();
|
||||
} else if (cmd == "info") {
|
||||
printInfo(args);
|
||||
} else if (cmd == "closure") {
|
||||
printClosure(args);
|
||||
} else if (cmd == "graph") {
|
||||
printGraph(args);
|
||||
} else
|
||||
throw UsageError("unknown command: " + string(cmd));
|
||||
}
|
||||
@ -594,6 +710,20 @@ Subcommands:
|
||||
|
||||
run HASH
|
||||
Run the descriptor referenced by HASH.
|
||||
|
||||
ensure HASH
|
||||
Like getpkg, but if HASH refers to a run descriptor, fetch only
|
||||
the dependencies.
|
||||
|
||||
info HASH...
|
||||
Print information about the specified descriptors.
|
||||
|
||||
closure HASH...
|
||||
Determine the closure of the set of descriptors under the import
|
||||
relation, starting at the given roots.
|
||||
|
||||
graph HASH...
|
||||
Like closure, but print a dot graph specification.
|
||||
";
|
||||
}
|
||||
|
||||
@ -630,8 +760,10 @@ void main2(int argc, char * * argv)
|
||||
}
|
||||
}
|
||||
|
||||
argc -= optind, argv += optind;
|
||||
run(argc, argv);
|
||||
vector<string> args;
|
||||
argc--, argv++;
|
||||
while (argc--) args.push_back(*argv++);
|
||||
run(args);
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user