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| author | Leah Neukirchen <leah@vuxu.org> | 2017-10-22 14:14:00 +0200 |
|---|---|---|
| committer | Leah Neukirchen <leah@vuxu.org> | 2017-10-22 14:14:00 +0200 |
| commit | f3548eefc864a08cba06d963fd6266da26b3c205 (patch) | |
| tree | 4cb09e6ef62d28946a29ac7392216114c113ded9 | |
| parent | efc41ae44e6ad317883a26c0cca91f30b2835720 (diff) | |
| download | necho-f3548eefc864a08cba06d963fd6266da26b3c205.tar.gz necho-f3548eefc864a08cba06d963fd6266da26b3c205.tar.xz necho-f3548eefc864a08cba06d963fd6266da26b3c205.zip | |
README: update
| -rw-r--r-- | README | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/README b/README index cd2ab14..2114026 100644 --- a/README +++ b/README @@ -20,8 +20,8 @@ DESCRIPTION The qecho utility writes its arguments, surrounded by unicode quotation marks, to standard output. - The jecho utility writes its arguments joined together to standard - output. + The jecho utility writes its arguments joined together with no separators + to standard output. The secho utility writes its arguments, separated by spaces, to standard output, followed by a <newline>. If there are no arguments, only the @@ -41,6 +41,22 @@ STANDARDS secho is a POSIX-conforming, but not XSI-conforming implementation of echo(1). +CAVEATS + These tools use writev(2) syscalls for efficient output. This generally + works fine, but there is a problem with using this function when writing + to the Linux proc(5) filesystem: only the first buffer will be regarded + as a write. + + Therefore, + + jecho 60 >/proc/sys/kernel/panic + + will work, but + + jecho 6 0 >/proc/sys/kernel/panic + + will just be regarded as a write of ‘6’. + AUTHORS Leah Neukirchen <leah@vuxu.org> |