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/*
* Copyright (c) 2014 Red Hat.
* Copyright (c) 2010 Aconex. All Rights Reserved.
* Copyright (c) 2000,2004 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <sys/stat.h>
#include <sys/dir.h>
#include <ctype.h>
#include <fcntl.h>
#include "pmapi.h"
#include "pmda.h"
#include "indom.h"
char *
get_distro_info(void)
{
/*
* Heuristic guesswork ... add code here as we learn
* more about how to identify each Linux distribution.
*/
static char *distro_name;
struct stat sbuf;
int r, sts, fd = -1, len = 0;
char path[MAXPATHLEN];
char prefix[16];
enum { /* rfiles array offsets */
DEB_VERSION = 0,
LSB_RELEASE = 6,
};
char *rfiles[] = { "debian_version", "oracle-release", "fedora-release",
"redhat-release", "slackware-version", "SuSE-release", "lsb-release",
/* insert any new distribution release variants here */
NULL
};
if (distro_name)
return distro_name;
for (r = 0; rfiles[r] != NULL; r++) {
snprintf(path, sizeof(path), "%s/etc/%s", linux_statspath, rfiles[r]);
if (stat(path, &sbuf) == 0 && S_ISREG(sbuf.st_mode)) {
fd = open(path, O_RDONLY);
break;
}
}
if (fd != -1) {
if (r == DEB_VERSION) { /* Debian, needs a prefix */
strncpy(prefix, "Debian ", sizeof(prefix));
len = 7;
}
/*
* at this point, assume sbuf is good and file contains
* the string we want, probably with a \n terminator
*/
distro_name = (char *)malloc(len + (int)sbuf.st_size + 1);
if (distro_name != NULL) {
if (len)
strncpy(distro_name, prefix, len);
sts = read(fd, distro_name + len, (int)sbuf.st_size);
if (sts <= 0) {
free(distro_name);
distro_name = NULL;
} else {
char *nl;
if (r == LSB_RELEASE) { /* may be Ubuntu */
if (!strncmp(distro_name, "DISTRIB_ID = ", 13))
distro_name += 13; /* ick */
if (!strncmp(distro_name, "DISTRIB_ID=", 11))
distro_name += 11; /* more ick */
}
distro_name[sts + len] = '\0';
if ((nl = strchr(distro_name, '\n')) != NULL)
*nl = '\0';
}
}
close(fd);
}
if (distro_name == NULL)
distro_name = "?";
return distro_name;
}
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