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-.\" Copyright (c) 2015 William Woodruff (william@tuffbizz.com)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH get_phys_pages 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-get_phys_pages, get_avphys_pages \- get total and available physical
-page counts
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B "#include <sys/sysinfo.h>"
-.P
-.B long get_phys_pages(void);
-.B long get_avphys_pages(void);
-.fi
-.SH DESCRIPTION
-The function
-.BR get_phys_pages ()
-returns the total number of physical pages of memory available on the system.
-.P
-The function
-.BR get_avphys_pages ()
-returns the number of currently available physical pages of memory on the
-system.
-.SH RETURN VALUE
-On success,
-these functions return a nonnegative value as given in DESCRIPTION.
-On failure, they return \-1 and set
-.I errno
-to indicate the error.
-.SH ERRORS
-.TP
-.B ENOSYS
-The system could not provide the required information
-(possibly because the
-.I /proc
-filesystem was not mounted).
-.SH STANDARDS
-GNU.
-.SH HISTORY
-Before glibc 2.23,
-these functions obtained the required information by scanning the
-.I MemTotal
-and
-.I MemFree
-fields of
-.IR /proc/meminfo .
-Since glibc 2.23,
-these functions obtain the required information by calling
-.BR sysinfo (2).
-.SH NOTES
-The following
-.BR sysconf (3)
-calls provide a portable means of obtaining the same information as the
-functions described on this page.
-.P
-.in +4n
-.EX
-total_pages = sysconf(_SC_PHYS_PAGES); /* total pages */
-avl_pages = sysconf(_SC_AVPHYS_PAGES); /* available pages */
-.EE
-.in
-.SH EXAMPLES
-The following example shows how
-.BR get_phys_pages ()
-and
-.BR get_avphys_pages ()
-can be used.
-.P
-.\" SRC BEGIN (get_phys_pages.c)
-.EX
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/sysinfo.h>
-\&
-int
-main(void)
-{
- printf("This system has %ld pages of physical memory and "
- "%ld pages of physical memory available.\en",
- get_phys_pages(), get_avphys_pages());
- exit(EXIT_SUCCESS);
-}
-.EE
-.\" SRC END
-.SH SEE ALSO
-.BR sysconf (3)