Date: Sun, 24 Jan 2021 13:18:46 +0100 From: Alejandro Colomar <alx.manpages@gmail.com> To: Bernhard Voelker <mail@bernhard-voelker.de>, Alex Henrie <alexhenrie24@gmail.com>, Christian Groessler <chris@groessler.org>, =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigbrady.com>, Coreutils <coreutils@gnu.org>, William Ahern <william@25thandclement.com>, Erik Auerswald <auerswal@unix-ag.uni-kl.de>, Eric Pruitt <eric.pruitt@gmail.com>, Jeffrey Walton <noloader@gmail.com> Cc: Alejandro Colomar <alx.manpages@gmail.com>, Michael Kerrisk <mtk.manpages@gmail.com>, Fabrice BAUZAC <noon@mykolab.com>, tech@openbsd.org, freebsd-hackers@freebsd.org, linux-api@vger.kernel.org, juli@clockworksquid.com, ed@nuxi.nl, oshogbo@freebsd.org Subject: [PATCH v3 (resend)] tee: Add -q, --quiet, --silent option to not write to stdout Message-ID: <20210124121845.38293-1-alx.manpages@gmail.com> In-Reply-To: <1f8ce444-35e2-56a7-dbd1-34e885372b11@gmail.com> References: <1f8ce444-35e2-56a7-dbd1-34e885372b11@gmail.com>
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This is useful for using tee to just write to a file,
at the end of a pipeline,
without having to redirect to /dev/null
Example:
echo 'foo' | sudo tee -q /etc/foo;
is equivalent to the old (and ugly)
echo 'foo' | sudo tee /etc/foo >/dev/null;
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
Resend as v3. I forgot to change the subject line.
Everything else is the same as in
<20210123145356.53962-1-alx.manpages@gmail.com>.
src/tee.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/src/tee.c b/src/tee.c
index c81faea91..1dfa92cf2 100644
--- a/src/tee.c
+++ b/src/tee.c
@@ -45,6 +45,9 @@ static bool append;
/* If true, ignore interrupts. */
static bool ignore_interrupts;
+/* Don't write to stdout */
+static bool quiet;
+
enum output_error
{
output_error_sigpipe, /* traditional behavior, sigpipe enabled. */
@@ -61,6 +64,8 @@ static struct option const long_options[] =
{"append", no_argument, NULL, 'a'},
{"ignore-interrupts", no_argument, NULL, 'i'},
{"output-error", optional_argument, NULL, 'p'},
+ {"quiet", no_argument, NULL, 'q'},
+ {"silent", no_argument, NULL, 'q'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
@@ -93,6 +98,7 @@ Copy standard input to each FILE, and also to standard output.\n\
"), stdout);
fputs (_("\
-p diagnose errors writing to non pipes\n\
+ -q, --quiet, --silent don't write to standard output\n\
--output-error[=MODE] set behavior on write error. See MODE below\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
@@ -130,8 +136,9 @@ main (int argc, char **argv)
append = false;
ignore_interrupts = false;
+ quiet = false;
- while ((optc = getopt_long (argc, argv, "aip", long_options, NULL)) != -1)
+ while ((optc = getopt_long (argc, argv, "aipq", long_options, NULL)) != -1)
{
switch (optc)
{
@@ -151,6 +158,10 @@ main (int argc, char **argv)
output_error = output_error_warn_nopipe;
break;
+ case 'q':
+ quiet = true;
+ break;
+
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
@@ -235,8 +246,9 @@ tee_files (int nfiles, char **files)
break;
/* Write to all NFILES + 1 descriptors.
- Standard output is the first one. */
- for (i = 0; i <= nfiles; i++)
+ Standard output is the first one.
+ If 'quiet' is true, write to descriptors 1 and above (omit stdout) */
+ for (i = quiet; i <= nfiles; i++)
if (descriptors[i]
&& fwrite (buffer, bytes_read, 1, descriptors[i]) != 1)
{
--
2.30.0
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