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Generalize the src-verify.c utility program and provide additional documentation

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in the header comment.

FossilOrigin-Name: 7ed84046ef0c2c64031cac3a3a6b43aac3ac40aeb36838d8d046493f2d5ed122
This commit is contained in:
drh
2023-06-05 01:05:46 +00:00
parent 59714faa68
commit 706047470e
3 changed files with 70 additions and 19 deletions
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73
tool/src-verify.c
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@ -1,17 +1,39 @@
/*
** This utility program reads the "manifest" and "manifest.uuid" files
** of the SQLite source tree and uses the content therein to verify that
** all of the other files in the source tree are correct.
** in a Fossil-generated source tree (where the repository has the
** "manifest" setting turned on - this is true for SQLite and Fossil itself)
** and verifies that the source code files are complete and unaltered by
** checking the SHA1 and SHA3 hashes of the source files contained in the
** "manifest" file.
**
** Limitations:
** On success it prints: "OK $HASH" where $HASH is the SHA3-256 hash of
** the check-in for the source tree. If it finds any discrepencies, it
** prints "Derived from $HASH with changes to:" followed by a list of files
** which have been altered.
**
** * Does not handle special characters in the filenames. The
** SQLite source tree has no filenames containing special
** characters, so that should not be an issue.
** USAGE:
**
** * Filename length is limited to 1000 characters. The SQLite
** source tree has no files more than 100 characters in length
** so that also should not be an issue.
** src-verify $(ROOT)
**
** Where ROOT is the root of the source tree - the directory that contains
** the "manifest" and "manifest.uuid" files. Add the "-v" option for
** some debugging output. Additional debugging options:
**
** src-verify --sha1 FILE ...
** src-verify --sha3 FILE ...
**
** Compute the SHA1 or SHA3-256 hashes for all of the FILEs named
**
** COMPILING:
**
** This utility is self-contained. It uses only the standard library.
** There are no other dependencies. Just compile it and run it.
**
** LIMITATIONS:
**
** * This utility assumes that the check-in hash uses SHA3-256.
** It is ok for individual file hashes to be SHA1, but the
** check-in itself must use a SHA3-256 hash.
*/
#include <stdio.h>
#include <string.h>
@ -721,6 +743,34 @@ void sha1sum_file(const char *zFilename, char *zCksum){
SHA1Final(zResult, &ctx);
DigestToBase16(zResult, zCksum, 20);
}
/*
** Decode a fossilized string in-place.
*/
void defossilize(char *z){
int i, j, c;
char *zSlash = strchr(z, '\\');
if( zSlash==0 ) return;
i = zSlash - z;
for(j=i; (c=z[i])!=0; i++){
if( c=='\\' && z[i+1] ){
i++;
switch( z[i] ){
case 'n': c = '\n'; break;
case 's': c = ' '; break;
case 't': c = '\t'; break;
case 'r': c = '\r'; break;
case 'v': c = '\v'; break;
case 'f': c = '\f'; break;
case '0': c = 0; break;
case '\\': c = '\\'; break;
default: c = z[i]; break;
}
}
z[j++] = c;
}
if( z[j] ) z[j] = 0;
}
/*
** Report that a single file is incorrect.
@ -744,8 +794,8 @@ int main(int argc, char **argv){
char zHash[100];
char zCk[100];
char zVers[100];
char zLine[4000];
char zFile[2000];
char zLine[40000];
char zFile[40000];
if( argc>=3 && strcmp(argv[1],"--sha1")==0 ){
/* For testing purposes, if the first argument is --sha1, then simply
** compute and print the SHA1 checksum of all subsequent arguments. */
@ -816,6 +866,7 @@ int main(int argc, char **argv){
}
if( j<sizeof(zFile) ) zFile[j] = 0;
zFile[sizeof(zFile)-1] = 0;
defossilize(&zFile[nDir]);
if( zLine[i]!=' ' ){
errorMsg(&nErr, zVers, "manifest");
return 1;