lookup_dcookie - Online Linux Manual PageSection : 2
Updated : 2022-12-04
Source : Linux man-pages 6.03
NAMElookup_dcookie − return a directory entry's path
LIBRARYStandard C library (libc, −lc)
SYNOPSIS#include <sys/syscall.h> /* Definition of SYS_* constants */
#include <unistd.h>int syscall(SYS_lookup_dcookie, uint64_t cookie, char *buffer,
size_t len);Note: glibc provides no wrapper for lookup_dcookie(), necessitating the use of syscall(2).
DESCRIPTIONLook up the full path of the directory entry specified by the value cookie. The cookie is an opaque identifier uniquely identifying a particular directory entry. The buffer given is filled in with the full path of the directory entry. For lookup_dcookie() to return successfully, the kernel must still hold a cookie reference to the directory entry.
RETURN VALUEOn success, lookup_dcookie() returns the length of the path string copied into the buffer. On error, −1 is returned, and errno is set to indicate the error.
ERRORSEFAULT The buffer was not valid. EINVAL The kernel has no registered cookie/directory entry mappings at the time of lookup, or the cookie does not refer to a valid directory entry. ENAMETOOLONG The name could not fit in the buffer. ENOMEM The kernel could not allocate memory for the temporary buffer holding the path. EPERM The process does not have the capability CAP_SYS_ADMIN required to look up cookie values. ERANGE The buffer was not large enough to hold the path of the directory entry.
VERSIONSAvailable since Linux 2.5.43. The ENAMETOOLONG error return was added in Linux 2.5.70.
STANDARDSlookup_dcookie() is Linux-specific.
NOTESlookup_dcookie() is a special-purpose system call, currently used only by the oprofile(1) profiler. It relies on a kernel driver to register cookies for directory entries. The path returned may be suffixed by the string " (deleted)" if the directory entry has been removed.
SEE ALSOoprofile(1) 0
Johanes Gumabo
Data Size : 8,123 byte
man-lookup_dcookie.2Build : 2024-12-29, 07:25 :
Visitor Screen : x
Visitor Counter ( page / site ) : 2 / 259,542
Visitor ID : :
Visitor IP : 3.141.25.125 :
Visitor Provider : AMAZON-02 :
Provider Position ( lat x lon ) : 39.962500 x -83.006100 : x
Provider Accuracy Radius ( km ) : 1000 :
Provider City : Columbus :
Provider Province : Ohio , : ,
Provider Country : United States :
Provider Continent : North America :
Visitor Recorder : Version :
Visitor Recorder : Library :
Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.29
Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page : Library : lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base : Version : Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base : Library : lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36
Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .
If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.