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authorMattias Andrée <m@maandree.se>2025-12-26 09:48:09 +0100
committerMattias Andrée <m@maandree.se>2025-12-26 10:05:39 +0100
commitfad53404f45b2e0daeda733687a41dd8e600aa57 (patch)
treef8dbd73a1e59cb8df53c7cb899c7d09ab5d74845 /alsause.1
parentFix open_tree support for when missing in libc (diff)
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Signed-off-by: Mattias Andrée <m@maandree.se>
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-.TH ALSAUSE 1 ALSAUSE
-.SH NAME
-alsause - Set default ALSA PCM device
-.SH SYNPOSIS
-.B alsause
-.RB [( \-r
-|
-.I name
-|
-.IR card \fB:\fP device )
-.RI [ command
-.RI [ argument "] ...]]"
-.SH DESCRIPTION
-The
-.B alsause
-utility lists all ALSA PCM devices or
-sets, either for the user or for a program
-it starts, the default ALSA PCM device.
-.PP
-No options or operands are specified,
-.B alsause
-will list all ALSA PCM devices, otherwise
-it will set the default ALSA PCM device.
-.PP
-If
-.I command
-is specified,
-.B alsause
-will run that command with the default
-ALSA PCM device set only for that process
-and it's child processes.
-.SH OPTIONS
-The
-.B alsause
-utility conforms to the Base Definitions volume of POSIX.1-2017,
-.IR "Section 12.2" ", " "Utility Syntax Guidelines" .
-.PP
-The following option is supported:
-.TP
-.B \-r
-Remove the user-specified default ALSA PCM device,
-falling back to the system-wide default ALSA PCM device.
-.SH OPERANDS
-The following operands shall be supported:
-.TP
-.IR card : device
-The card number and device number to use as the default
-ALSA PCM device.
-.TP
-.I name
-The card and device, by name, to use as the default
-ALSA PCM device. This string is on the form output by the
-.B alsause
-utility itself:
-.BR "\(dq%s - %s\(dq" ,
-.RI < "card name" >,
-.RI < "device name" >.
-.TP
-.I command
-The name of the utility to be invoked.
-.TP
-.I argument
-A string to pass as an argument for the invoked utility.
-.SH STDIN
-Not used.
-.SH INPUT FILES
-None.
-.SH ENVIRONMENT VARIABLES
-The following environment variable affects the execution of
-.TP
-.I HOME
-Used to override the path to the user's home directroy.
-.TP
-.I PATH
-Determine the location of the
-.IR command ,
-as described in the Base Definitions volume of POSIX.1-2017,
-.IR "Chapter 8" ", " "Environment Variables" .
-.PP
-Additionally, environment variables that affect ALSA takes
-precedence over the default device set by the
-.B alsause
-utility.
-.SH ASYNCHRONOUS EVENTS
-Default.
-.SH STDOUT
-If no option or operand is specified, each ALSA PCM device is the form:
-.RS
-
-\fB\(dq%u:%u\et%s - %s\en\(dq,\fP <\fIcard number\fP>\fB,\fP <\fIdevice number\fP>\fB,\fP <\fIcard name\fP>\fB,\fP <\fIdevice name\fP>
-
-.RE
-Otherwise, the
-.B alsause
-utility does not write to standard output.
-.SH STDERR
-The standard error shall be used only for diagnostic messages.
-.SH OUTPUT FILES
-If the the default ALSA PCM device is set, the
-.B alsause
-utility may create, modify, replace, or unlink the file
-.I .asoundrc
-placed in the user's home directory.
-.SH EXTENDED DESCRIPTION
-None.
-.SH EXIT STATUS
-If
-.I command
-is invoked, the exit status of
-.B alsause
-is the exit status of
-.IR command ;
-otherwise, the
-.B alsause
-utility exits with one of the following values.
-.TP
-0
-The
-.I alsause
-utility completed successfully.
-.TP
-125
-An error occurred in the
-.I alsause
-utility.
-.TP
-126
-The utility specified by
-.I command
-was found but could not be invoked.
-.TP
-127
-The utility specified by
-.I command
-could not be found.
-.SH SEE ALSO
-None.