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;
---
v2: Add --silent synonym to --quiet, per GNU guidelines.
I tested --silent with success.
v3: Added -q to opstring, which I removed by accident in v2.
I tested all -q, --quiet and --silent this time.
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
