LSEARCH(3) Linux Programmer's Manual LSEARCH(3)NAME
lfind, lsearch - linear search of an array
SYNOPSIS
#include <search.h>
void *lfind(const void *key, const void *base, size_t *nmemb,
size_t size, int(*compar)(const void *, const void *));
void *lsearch(const void *key, void *base, size_t *nmemb,
size_t size, int(*compar)(const void *, const void *));
DESCRIPTIONlfind() and lsearch() perform a linear search for key in the array base
which has *nmemb elements of size bytes each. The comparison function
referenced by compar is expected to have two arguments which point to
the key object and to an array member, in that order, and which returns
zero if the key object matches the array member, and nonzero otherwise.
If lsearch() does not find a matching element, then the key object is
inserted at the end of the table, and *nmemb is incremented. In par‐
ticular, one should know that a matching element exists, or that more
room is available.
RETURN VALUElfind() returns a pointer to a matching member of the array, or NULL if
no match is found. lsearch() returns a pointer to a matching member of
the array, or to the newly added member if no match is found.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├───────────────────┼───────────────┼─────────┤
│lfind(), lsearch() │ Thread safety │ MT-Safe │
└───────────────────┴───────────────┴─────────┘
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD. Present in libc since
libc-4.6.27.
BUGS
The naming is unfortunate.
SEE ALSObsearch(3), hsearch(3), tsearch(3)COLOPHON
This page is part of release 4.14 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2017-09-15 LSEARCH(3)
