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107 lines
4.8 KiB
Groff
107 lines
4.8 KiB
Groff
'\" t
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.TH "UDEV_DEVICE_GET_SYSPATH" "3" "" "systemd 221" "udev_device_get_syspath"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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udev_device_get_syspath, udev_device_get_sysname, udev_device_get_sysnum, udev_device_get_devpath, udev_device_get_devnode, udev_device_get_devnum, udev_device_get_devtype, udev_device_get_subsystem, udev_device_get_driver, udev_device_get_udev, udev_device_get_parent, udev_device_get_parent_with_subsystem_devtype, udev_device_get_is_initialized, udev_device_get_action \- Query device properties
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.SH "SYNOPSIS"
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.sp
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.ft B
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.nf
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#include <libudev\&.h>
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.fi
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.ft
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.HP \w'const\ char\ *udev_device_get_syspath('u
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.BI "const char *udev_device_get_syspath(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_sysname('u
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.BI "const char *udev_device_get_sysname(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_sysnum('u
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.BI "const char *udev_device_get_sysnum(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_devpath('u
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.BI "const char *udev_device_get_devpath(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_devnode('u
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.BI "const char *udev_device_get_devnode(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'dev_t\ udev_device_get_devnum('u
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.BI "dev_t udev_device_get_devnum(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_devtype('u
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.BI "const char *udev_device_get_devtype(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_subsystem('u
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.BI "const char *udev_device_get_subsystem(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_driver('u
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.BI "const char *udev_device_get_driver(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'struct\ udev\ *udev_device_get_udev('u
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.BI "struct udev *udev_device_get_udev(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'struct\ udev_device\ *udev_device_get_parent('u
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.BI "struct udev_device *udev_device_get_parent(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'struct\ udev_device\ *udev_device_get_parent_with_subsystem_devtype('u
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.BI "struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'int\ udev_device_get_is_initialized('u
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.BI "int udev_device_get_is_initialized(struct\ udev_device\ *" "udev_device" ");"
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.HP \w'const\ char\ *udev_device_get_action('u
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.BI "const char *udev_device_get_action(struct\ udev_device\ *" "udev_device" ", const\ char\ *" "subsystem" ", const\ char\ *" "devtype" ");"
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.SH "RETURN VALUE"
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.PP
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On success,
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\fBudev_device_get_syspath()\fR,
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\fBudev_device_get_sysname()\fR,
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\fBudev_device_get_sysnum()\fR,
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\fBudev_device_get_devpath()\fR,
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\fBudev_device_get_devnode()\fR,
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\fBudev_device_get_devtype()\fR,
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\fBudev_device_get_subsystem()\fR,
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\fBudev_device_get_driver()\fR
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and
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\fBudev_device_get_action()\fR
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return a pointer to a constant string that describes the requested property\&. The lifetime of this string is bound to the device it was requested on\&. On failure, each function may return
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\fBNULL\fR\&.
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.PP
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On success,
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\fBudev_device_get_devnum()\fR
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returns the device type of the passed device\&. On failure, a device type with minor and major number set to
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\fB0\fR
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is returned\&.
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.PP
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\fBudev_device_get_udev()\fR
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always returns a valid pointer to the udev context that this device belongs to\&.
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.PP
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On success,
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\fBudev_device_get_parent()\fR
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and
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\fBudev_device_get_parent_with_subsystem_devtype()\fR
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return a pointer to the parent device\&. No additional reference to this device is acquired, but the child device owns a reference to such parent device\&. On failure,
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\fBNULL\fR
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is returned\&.
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.PP
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On success,
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\fBudev_device_get_is_initialized()\fR
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returns either
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\fB1\fR
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or
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\fB0\fR, depending on whether the passed device is initialized or not\&. On failure, a negative error code is returned\&.
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.SH "SEE ALSO"
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.PP
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\fBudev_new\fR(3),
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\fBudev_device_new_from_syspath\fR(3),
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\fBudev_device_has_tag\fR(3),
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\fBudev_enumerate_new\fR(3),
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\fBudev_monitor_new_from_netlink\fR(3),
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\fBudev_list_entry\fR(3),
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\fBsystemd\fR(1),
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