diff options
| -rw-r--r-- | tools/dosfstools/patches/source-date-epoch.patch | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/tools/dosfstools/patches/source-date-epoch.patch b/tools/dosfstools/patches/source-date-epoch.patch new file mode 100644 index 0000000000..fb46753f24 --- /dev/null +++ b/tools/dosfstools/patches/source-date-epoch.patch @@ -0,0 +1,157 @@ +From 8da7bc93315cb0c32ad868f17808468b81fa76ec Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com> +Date: Wed, 5 Dec 2018 19:52:51 +0100 +Subject: [PATCH] Honor the SOURCE_DATE_EPOCH variable +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Implement the SOURCE_DATE_EPOCH specification[1] for reproducible +builds. If SOURCE_DATE_EPOCH is set, use it as timestamp instead of the +current time. + +[1] https://reproducible-builds.org/specs/source-date-epoch/ + +Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com> +--- + src/boot.c | 23 +++++++++++++++++++++-- + src/common.c | 18 ++++++++++++++++-- + src/mkfs.fat.c | 19 ++++++++++++++++--- + 3 files changed, 53 insertions(+), 7 deletions(-) + +diff --git a/src/boot.c b/src/boot.c +index 4de450d..8f78e1c 100644 +--- a/src/boot.c ++++ b/src/boot.c +@@ -33,6 +33,8 @@ + #include <stdlib.h> + #include <sys/types.h> + #include <time.h> ++#include <errno.h> ++#include <ctype.h> + + #include "common.h" + #include "fsck.fat.h" +@@ -672,6 +674,7 @@ void write_volume_label(DOS_FS * fs, char *label) + { + time_t now; + struct tm *mtime; ++ char *source_date_epoch = NULL; + off_t offset; + int created; + DIR_ENT de; +@@ -687,8 +690,24 @@ void write_volume_label(DOS_FS * fs, char *label) + if (de.name[0] == 0xe5) + de.name[0] = 0x05; + +- now = time(NULL); +- mtime = (now != (time_t)-1) ? localtime(&now) : NULL; ++ source_date_epoch = getenv("SOURCE_DATE_EPOCH"); ++ if (source_date_epoch) { ++ char *tmp = NULL; ++ long long conversion = 0; ++ errno = 0; ++ conversion = strtoll(source_date_epoch, &tmp, 10); ++ now = conversion; ++ if (!isdigit((unsigned char)*source_date_epoch) || *tmp != '\0' ++ || errno != 0 || (long long)now != conversion) { ++ die("SOURCE_DATE_EPOCH is too big or contains non-digits: \"%s\"", ++ source_date_epoch); ++ } ++ mtime = gmtime(&now); ++ } else { ++ now = time(NULL); ++ mtime = (now != (time_t)-1) ? localtime(&now) : NULL; ++ } ++ + if (mtime && mtime->tm_year >= 80 && mtime->tm_year <= 207) { + de.time = htole16((unsigned short)((mtime->tm_sec >> 1) + + (mtime->tm_min << 5) + +diff --git a/src/common.c b/src/common.c +index 6a2e396..4f1afcb 100644 +--- a/src/common.c ++++ b/src/common.c +@@ -30,6 +30,7 @@ + #include <string.h> + #include <stdarg.h> + #include <errno.h> ++#include <ctype.h> + #include <wctype.h> + #include <termios.h> + #include <sys/time.h> +@@ -298,8 +299,21 @@ void check_atari(void) + uint32_t generate_volume_id(void) + { + struct timeval now; +- +- if (gettimeofday(&now, NULL) != 0 || now.tv_sec == (time_t)-1 || now.tv_sec < 0) { ++ char *source_date_epoch = NULL; ++ ++ source_date_epoch = getenv("SOURCE_DATE_EPOCH"); ++ if (source_date_epoch) { ++ char *tmp = NULL; ++ long long conversion = 0; ++ errno = 0; ++ conversion = strtoll(source_date_epoch, &tmp, 10); ++ if (!isdigit((unsigned char)*source_date_epoch) || *tmp != '\0' ++ || errno != 0) { ++ die("SOURCE_DATE_EPOCH is too big or contains non-digits: \"%s\"", ++ source_date_epoch); ++ } ++ return (uint32_t)conversion; ++ } else if (gettimeofday(&now, NULL) != 0 || now.tv_sec == (time_t)-1 || now.tv_sec < 0) { + srand(getpid()); + /* rand() returns int from [0,RAND_MAX], therefore only 31 bits */ + return (((uint32_t)(rand() & 0xFFFF)) << 16) | ((uint32_t)(rand() & 0xFFFF)); +diff --git a/src/mkfs.fat.c b/src/mkfs.fat.c +index 37fc8ff..1948635 100644 +--- a/src/mkfs.fat.c ++++ b/src/mkfs.fat.c +@@ -1074,7 +1074,7 @@ static void setup_tables(void) + } + + /* If is not available then generate random 32 bit disk signature */ +- if (invariant) ++ if (invariant || getenv("SOURCE_DATE_EPOCH")) + disk_sig = volume_id; + else if (!disk_sig) + disk_sig = generate_volume_id(); +@@ -1287,7 +1287,7 @@ static void setup_tables(void) + de->name[0] = 0x05; + de->attr = ATTR_VOLUME; + if (create_time != (time_t)-1) { +- if (!invariant) ++ if (!invariant && !getenv("SOURCE_DATE_EPOCH")) + ctime = localtime(&create_time); + else + ctime = gmtime(&create_time); +@@ -1477,6 +1477,7 @@ int main(int argc, char **argv) + int blocks_specified = 0; + struct timeval create_timeval; + long long conversion; ++ char *source_date_epoch = NULL; + + enum {OPT_HELP=1000, OPT_INVARIANT, OPT_MBR, OPT_VARIANT, OPT_CODEPAGE, OPT_OFFSET}; + const struct option long_options[] = { +@@ -1497,8 +1498,20 @@ int main(int argc, char **argv) + program_name = p + 1; + } + +- if (gettimeofday(&create_timeval, NULL) == 0 && create_timeval.tv_sec != (time_t)-1) ++ source_date_epoch = getenv("SOURCE_DATE_EPOCH"); ++ if (source_date_epoch) { ++ errno = 0; ++ conversion = strtoll(source_date_epoch, &tmp, 10); ++ create_time = conversion; ++ if (!isdigit((unsigned char)*source_date_epoch) || *tmp != '\0' ++ || errno != 0 || (long long)create_time != conversion) { ++ die("SOURCE_DATE_EPOCH is too big or contains non-digits: \"%s\"", ++ source_date_epoch); ++ } ++ } else if (gettimeofday(&create_timeval, NULL) == 0 && create_timeval.tv_sec != (time_t)-1) { + create_time = create_timeval.tv_sec; ++ } ++ + volume_id = generate_volume_id(); + check_atari(); +
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