diff options
Diffstat (limited to 'lib/util')
| -rw-r--r-- | lib/util/Makemodule.am | 1 | ||||
| -rw-r--r-- | lib/util/source_date_epoch.c | 44 |
2 files changed, 45 insertions, 0 deletions
diff --git a/lib/util/Makemodule.am b/lib/util/Makemodule.am index d37f2b1..b65ebda 100644 --- a/lib/util/Makemodule.am +++ b/lib/util/Makemodule.am @@ -12,6 +12,7 @@ libutil_a_SOURCES += lib/util/is_memory_zero.c libutil_a_SOURCES += lib/util/mkdir_p.c libutil_a_SOURCES += lib/util/canonicalize_name.c libutil_a_SOURCES += lib/util/filename_sane.c +libutil_a_SOURCES += lib/util/source_date_epoch.c libutil_a_CFLAGS = $(AM_CFLAGS) libutil_a_CPPFLAGS = $(AM_CPPFLAGS) diff --git a/lib/util/source_date_epoch.c b/lib/util/source_date_epoch.c new file mode 100644 index 0000000..26e5530 --- /dev/null +++ b/lib/util/source_date_epoch.c @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: LGPL-3.0-or-later */ +/* + * source_date_epoch.c + * + * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> + */ +#include "util/util.h" + +#include <stdlib.h> +#include <stdio.h> +#include <ctype.h> + +sqfs_u32 get_source_date_epoch(void) +{ + const char *str, *ptr; + sqfs_u32 x, tval = 0; + + str = getenv("SOURCE_DATE_EPOCH"); + + if (str == NULL || *str == '\0') + return 0; + + for (ptr = str; *ptr != '\0'; ++ptr) { + if (!isdigit(*ptr)) + goto fail_nan; + + x = (*ptr) - '0'; + + if (tval > (UINT32_MAX - x) / 10) + goto fail_ov; + + tval = tval * 10 + x; + } + + return tval; +fail_ov: + fprintf(stderr, "WARNING: SOURCE_DATE_EPOCH=%s does not fit into " + "32 bit integer\n", str); + return 0; +fail_nan: + fprintf(stderr, "WARNING: SOURCE_DATE_EPOCH=%s is not a positive " + "number\n", str); + return 0; +} |