72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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* libproc2 - Library to read proc filesystem
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*
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* Copyright © 2002-2023 Craig Small <csmall@dropbear.xyz>
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* Copyright © 2013-2023 Jim Warner <james.warner@comcast.net>
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* Copyright © 2011-2012 Sami Kerola <kerolasa@iki.fi>
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* Copyright © 2002-2003 Albert Cahalan
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* Copyright © 1996 Charles Blake <cblake@bbn.com>
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* Copyright © 1995 Martin Schulze <joey@infodrom.north.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <errno.h>
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#include <stdio.h>
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#include "misc.h"
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#include "procps-private.h"
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#ifdef __CYGWIN__
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#define PROCFS_OSRELEASE "/proc/version"
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#define PROCFS_OSPATTERN "%*s version %u.%u.%u"
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#else
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#define PROCFS_OSRELEASE "/proc/sys/kernel/osrelease"
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#define PROCFS_OSPATTERN "%u.%u.%u"
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#endif
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/*
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* procps_linux_version
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*
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* Return the current running Linux version release as shown in
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* the procps filesystem.
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*
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* There are three ways you can get OS release:
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* 1) /proc/sys/kernel/osrelease - returns correct version of procfs
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* 2) /proc/version - returns version of kernel e.g. BSD this is wrong
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* 3) uname and uts.release - same as /proc/version field #3
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*
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* Returns: version as an integer
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* Negative value means an error
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*/
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PROCPS_EXPORT int procps_linux_version(void)
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{
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FILE *fp;
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char buf[256];
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unsigned int x = 0, y = 0, z = 0;
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int version_string_depth;
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if ((fp = fopen(PROCFS_OSRELEASE, "r")) == NULL)
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return -errno;
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if (fgets(buf, 256, fp) == NULL) {
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fclose(fp);
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return -EIO;
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}
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fclose(fp);
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version_string_depth = sscanf(buf, PROCFS_OSPATTERN, &x, &y, &z);
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if ((version_string_depth < 2) || /* Non-standard for all known kernels */
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((version_string_depth < 3) && (x < 3))) /* Non-standard for 2.x.x kernels */
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return -ERANGE;
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return LINUX_VERSION(x,y,z);
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}
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