utils-std

commit: b26b52d4f7479f0485d52dcc1ed2565d8dc397c9
parent 0aa87acbacda979c1f7ac7a41a6d4c0a8b7f4d94
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Mon, 21 Oct 2024 14:34:35 +0200

cmd/sha*sum.1: Add grep example to ignoring missing files

Diffstat:
M
cmd/sha1sum.1
5
+++++
M
cmd/sha256sum.1
5
+++++
M
cmd/sha512sum.1
5
+++++

3 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/cmd/sha1sum.1 b/cmd/sha1sum.1
@@ -28,6 +28,11 @@ and finally a filename.
 .El
 .Sh EXIT STATUS
 .Ex -std
+.Sh EXAMPLES
+Check tarballs in current directory against the
+.Pa sha1sums.txt
+digest and ignore the rest of it:
+.Dl printf %s\en *.tar* | grep -f - sha1sums.txt | sha1sum -c -
 .Sh SEE ALSO
 .Xr sha256sum 1
 .Sh STANDARDS
diff --git a/cmd/sha256sum.1 b/cmd/sha256sum.1
@@ -28,6 +28,11 @@ and finally a filename.
 .El
 .Sh EXIT STATUS
 .Ex -std
+.Sh EXAMPLES
+Check tarballs in current directory against the
+.Pa sha256sums.txt
+digest and ignore the rest of it:
+.Dl printf %s\en *.tar* | grep -f - sha256sums.txt | sha256sum -c -
 .Sh STANDARDS
 SHA256 is standardized both in FIPS 180-4 and RFC 6234.
 .Sh AUTHORS
diff --git a/cmd/sha512sum.1 b/cmd/sha512sum.1
@@ -28,6 +28,11 @@ and finally a filename.
 .El
 .Sh EXIT STATUS
 .Ex -std
+.Sh EXAMPLES
+Check tarballs in current directory against the
+.Pa sha512sums.txt
+digest and ignore the rest of it:
+.Dl printf %s\en *.tar* | grep -f - sha512sums.txt | sha512sum -c -
 .Sh STANDARDS
 SHA512 is standardized both in FIPS 180-4 and RFC 6234.
 .Sh AUTHORS