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tools: zip: add option for reproducible archives

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Add the option -mt/--mtime to pass a timestamp which is used as filedate
for the containing files.

So far, it isn't used for anything written to the extra fields,
therefore requires the -X (eXclude eXtra file attributes) parameter to
be effective.

Signed-off-by: Mathias Kresin <dev@kresin.me>
This commit is contained in:
Mathias Kresin 2019-01-12 19:39:33 +01:00
parent ad8c2d6099
commit 18c9faa032
1 changed files with 145 additions and 0 deletions
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tools/zip/patches/011-add-option-for-reproducible-archives.patch Normal file
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@ -0,0 +1,145 @@
From 6d659fc87451c02c8777dc33f750b16834e4c715 Mon Sep 17 00:00:00 2001
From: Mathias Kresin <dev@kresin.me>
Date: Sat, 12 Jan 2019 19:33:33 +0100
Subject: [PATCH] add option for reproducible archives
Add the option -mt/--mtime to pass a timestamp which is used as filedate
for the containing files.
So far, it isn't used for anything written to the extra fields,
therefore requires the -X (eXclude eXtra file attributes) parameter to
be effective.
Signed-off-by: Mathias Kresin <dev@kresin.me>
---
globals.c | 1 +
util.c | 22 ++++++++++++++++++++++
zip.c | 6 ++++++
zip.h | 1 +
zipup.c | 4 +++-
5 files changed, 33 insertions(+), 1 deletion(-)
--- a/globals.c
+++ b/globals.c
@@ -205,6 +205,7 @@ uzoff_t bytes_this_split = 0; /* byt
int read_split_archive = 0; /* 1=scanzipf_reg detected spanning signature */
int split_method = 0; /* 0=no splits, 1=seekable, 2=data desc, -1=no */
uzoff_t split_size = 0; /* how big each split should be */
+time_t timestamp = -1; /* fixed timestamp for archive content filedate */
int split_bell = 0; /* when pause for next split ring bell */
uzoff_t bytes_prev_splits = 0; /* total bytes written to all splits before this */
uzoff_t bytes_this_entry = 0; /* bytes written for this entry across all splits */
--- a/util.c
+++ b/util.c
@@ -1217,6 +1217,7 @@ int DisplayNumString(file, i)
return 0;
}
+
/* Read numbers with trailing size multiplier (like 10M) and return number.
10/30/04 EG */
@@ -1279,6 +1280,29 @@ uzoff_t ReadNumString( numstring )
}
+uzoff_t ReadNumStringUL( numstring )
+ char *numstring;
+{
+ zoff_t num = 0;
+
+ /* check if valid number (currently no negatives) */
+ if (numstring == NULL) {
+ zipwarn("Unable to read empty number in ReadNumString", "");
+ return (uzoff_t)-1;
+ }
+ if (numstring[0] < '0' || numstring[0] > '9') {
+ zipwarn("Unable to read number (must start with digit): ", numstring);
+ return (uzoff_t)-1;
+ }
+ if (strlen(numstring) > 10) {
+ zipwarn("Number too long to read (10 characters max): ", numstring);
+ return (uzoff_t)-1;
+ }
+
+ return (uzoff_t)atoll(numstring);
+}
+
+
/* Write the number as a string with a multiplier (like 10M) to outstring.
Always writes no more than 3 digits followed maybe by a multiplier and
returns the characters written or -1 if error.
--- a/zip.c
+++ b/zip.c
@@ -1942,6 +1942,7 @@ int set_filetype(out_path)
#ifdef UNICODE_TEST
#define o_sC 0x146
#endif
+#define o_mt 0x255
/* the below is mainly from the old main command line
@@ -2036,6 +2037,7 @@ struct option_struct far options[] = {
{"m", "move", o_NO_VALUE, o_NOT_NEGATABLE, 'm', "add files to archive then delete files"},
{"mm", "", o_NO_VALUE, o_NOT_NEGATABLE, o_mm, "not used"},
{"MM", "must-match", o_NO_VALUE, o_NOT_NEGATABLE, o_MM, "error if in file not matched/not readable"},
+ {"mt", "mtime", o_REQUIRED_VALUE, o_NOT_NEGATABLE, o_mt, "use fixed timestamp for archive content filedate"},
{"n", "suffixes", o_REQUIRED_VALUE, o_NOT_NEGATABLE, 'n', "suffixes to not compress: .gz:.zip"},
{"nw", "no-wild", o_NO_VALUE, o_NOT_NEGATABLE, o_nw, "no wildcards during add or update"},
#if defined(AMIGA) || defined(MACOS)
@@ -2440,6 +2442,7 @@ char **argv; /* command line
split_method = 0; /* 0=no splits, 1=update LHs, 2=data descriptors */
split_size = 0; /* how big each split should be */
split_bell = 0; /* when pause for next split ring bell */
+ timestamp = -1; /* fixed timestamp for archive content filedate */
bytes_prev_splits = 0; /* total bytes written to all splits before this */
bytes_this_entry = 0; /* bytes written for this entry across all splits */
noisy_splits = 0; /* be verbose about creating splits */
@@ -2897,6 +2900,9 @@ char **argv; /* command line
dispose = 1; break;
case o_MM: /* Exit with error if input file can't be read */
bad_open_is_error = 1; break;
+ case o_mt: /* fixed timestamp for archive content filedate */
+ timestamp = ReadNumStringUL(value);
+ break;
case 'n': /* Don't compress files with a special suffix */
special = value;
/* special = NULL; */ /* will be set at next argument */
--- a/zip.h
+++ b/zip.h
@@ -502,6 +502,7 @@ extern uzoff_t bytes_this_split; /* byte
extern int read_split_archive; /* 1=scanzipf_reg detected spanning signature */
extern int split_method; /* 0=no splits, 1=seekable, 2=data descs, -1=no */
extern uzoff_t split_size; /* how big each split should be */
+extern time_t timestamp; /* fixed timestamp for archive content filedate */
extern int split_bell; /* when pause for next split ring bell */
extern uzoff_t bytes_prev_splits; /* total bytes written to all splits before this */
extern uzoff_t bytes_this_entry; /* bytes written for this entry across all splits */
@@ -789,6 +790,7 @@ char *zip_fzofft OF((zoff_t, char
int DisplayNumString OF ((FILE *file, uzoff_t i));
int WriteNumString OF((uzoff_t num, char *outstring));
uzoff_t ReadNumString OF((char *numstring));
+uzoff_t ReadNumStringUL OF((char *numstring));
/* returns true if abbrev is abbreviation for string */
int abbrevmatch OF((char *, char *, int, int));
--- a/zipup.c
+++ b/zipup.c
@@ -415,7 +415,6 @@ struct zlist far *z; /* zip entry to
char *tempextra = NULL;
char *tempcextra = NULL;
-
#ifdef WINDLL
# ifdef ZIP64_SUPPORT
extern _int64 filesize64;
@@ -441,6 +440,9 @@ struct zlist far *z; /* zip entry to
if (tim == 0 || q == (zoff_t) -3)
return ZE_OPEN;
+ if (timestamp > 0)
+ tim = unix2dostime(&timestamp);
+
/* q is set to -1 if the input file is a device, -2 for a volume label */
if (q == (zoff_t) -2) {
isdir = 1;