SND_PCM_CAPTURE_READ(9) Sound Devices SND_PCM_CAPTURE_READ(9)NAME
snd_pcm_capture_ready - check whether the capture buffer is available
int snd_pcm_capture_ready(struct snd_pcm_substream * substream);
the pcm substream instance
Checks whether enough capture data is available on the capture buffer.
Non-zero if available, or zero if not.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SND_PCM_CAPTURE_READ(9)
Check Out this Related Man Page
libssh2_channel_read_ex(3) libssh2 manual libssh2_channel_read_ex(3)NAME
libssh2_channel_read_ex - read data from a channel stream
ssize_t libssh2_channel_read_ex(LIBSSH2_CHANNEL *channel, int stream_id, char *buf, size_t buflen);
ssize_t libssh2_channel_read(LIBSSH2_CHANNEL *channel, char *buf, size_t buflen);
ssize_t libssh2_channel_read_stderr(LIBSSH2_CHANNEL *channel, char *buf, size_t buflen);
Attempt to read data from an active channel stream. All channel streams have one standard I/O substream (stream_id == 0), and may have up
to 2^32 extended data streams as identified by the selected stream_id. The SSH2 protocol currently defines a stream ID of 1 to be the
channel - active channel stream to read from.
stream_id - substream ID number (e.g. 0 or SSH_EXTENDED_DATA_STDERR)
buf - pointer to storage buffer to read data into
buflen - size of the buf storage
libssh2_channel_read(3) and libssh2_channel_read_stderr(3) are macros.
Actual number of bytes read or negative on failure. It returns LIBSSH2_ERROR_EAGAIN when it would otherwise block. While LIB-
SSH2_ERROR_EAGAIN is a negative number, it isn't really a failure per se.
Note that a return value of zero (0) can in fact be a legitimate value and only signals that no payload data was read. It is not an error.
LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.
LIBSSH2_ERROR_CHANNEL_CLOSED - The channel has been closed.
SEE ALSO libssh2_poll_channel_read(3)libssh2 0.15 1 Jun 2007 libssh2_channel_read_ex(3)
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive)
i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example:
$ cat docker_file.yml
So, I would like... (6 Replies)
We use DB2 v10.5 and using DBArtisan tool
Can someone please guide how to convert digits to binary numbers using db2 feature.
Ex> for number 9 , binary should be 1001 ( 8+1)
Any help appreciated. Thanks (2 Replies)
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Please use CODE tags as... (6 Replies)
Quite an obscure question I think.
We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello... And thanks in advance for any help anyone can offer me
I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
... (10 Replies)
After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future.
... (1 Reply)
I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of UNIX.com for 15+ years.
Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)