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/*
linuxinfo_common.c
Copyright (C) 1998-2000
All Rights Reserved.
Alex Buell <alex.buell@munted.eu>
Copyright (C) 2004-2007,2009,2010,2013
Helge Kreutzmann <debian@helgefjell.de>
Version Author Date Comments
----------------------------------------------------------------------
1.0.0 AIB 199803?? Initial development
1.0.1 AIB 20000405 Added read_line function
1.0.2 AIB 20000405 Moved strstr() from linuxinfo.h to here
1.0.3 AIB 20010809 Added getphysicalmemory()
1.0.4 KRE 20110104 Fix resource leak found by DACA/cppcheck
Common functions module
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <libintl.h>
#define _(String) gettext (String)
#include "linuxinfo.h"
#ifdef use_regexp
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#endif
void GetOperatingSystemInfo(struct os_stat *os)
{
#ifndef system_unknown
struct utsname buf;
uname(&buf);
strcpy(os->os_hostname, buf.nodename);
strcpy(os->os_name, buf.sysname);
strcpy(os->os_version, buf.release);
strcpy(os->os_revision, buf.version);
#else
strcpy(os->os_hostname, "Unknown");
strcpy(os->os_name, "Unknown");
strcpy(os->os_version, "Unknown");
strcpy(os->os_revision, "Unknown");
#endif /* system_unknown */
}
/* Really neat hack to detect all libraries known on Linux */
#ifndef system_unknown
asm (".weak gnu_get_libc_version");
asm (".weak __libc_version");
asm (".weak __linux_C_lib_version");
extern char *gnu_get_libc_version (void);
extern char *__linux_C_lib_version;
extern char __libc_version [];
#endif /* only define if on a Linux system :o) */
void GetSystemLibcInfo(struct lib_stat *lib)
{
int libc_major = 0, libc_minor = 0, libc_teeny = 0;
char *ptr;
/* initialise to unknown */
strcpy(lib->lib_version, "Unknown");
#ifndef system_unknown
if (gnu_get_libc_version != 0)
{
ptr = gnu_get_libc_version();
}
else if (&__libc_version != 0)
{
ptr = __libc_version;
}
else
ptr = __linux_C_lib_version;
while (!isdigit (*ptr))
ptr++;
sscanf (ptr, "%d.%d.%d", &libc_major, &libc_minor, &libc_teeny);
sprintf(lib->lib_version, "%d.%d.%d", libc_major, libc_minor, libc_teeny);
#endif /* system_unknown */
}
int read_line(int fd, char *buffer, size_t length)
{
off_t curpos = lseek(fd, 0, SEEK_CUR);
int len = read(fd, buffer, length);
char *p = strchr(buffer, 0x0a);
if (fd < 0)
return 0;
if (len < 0)
return len;
if (p != NULL)
len = (p - buffer) + 1;
lseek(fd, curpos + len, SEEK_SET);
if (p != NULL)
*p = 0;
return len;
}
int splitstring(char *first_string, char *second_string)
{
char *p;
p = strchr(first_string, ':');
if (!p)
return 0;
*(p-1) = '\0', p++;
while (isspace(*p)) p++;
strcpy(second_string, p);
}
LONGLONG getphysicalmemory(void)
{
LONGLONG memory;
struct stat st_buf;
int meminfo_fd;
char temp_string[BUFSIZ], temp_string2[BUFSIZ];
int found;
memory = 0;
meminfo_fd = open(MEMINFO_FILE, O_RDONLY);
found=0;
if (meminfo_fd < 0)
{
printf(_("Could not stat /proc/meminfo, result can be inaccurate\n"));
// printf(gettext("Could not stat /proc/meminfo, result can be inaccurate\n"));
}
else
{ while (read_line(meminfo_fd, temp_string, BUFSIZ) != 0)
{
if (splitstring(temp_string, temp_string2))
{
if ((strncmp(temp_string, "MemTota", strlen("MemTota")) == 0)&&!found)
{
found=1;
memory = (LONGLONG)atol(temp_string2);
memory /= 1024;
}
}
}
close(meminfo_fd);
}
return memory;
}
#if !(HAVE_STRSTR)
char *strstr (const char *haystack, const char *needle)
{
c, sc;
size_t len;
if ((c = *find++) != 0)
{
len = strlen(find);
do
{
do
{
if ((sc = *s++) == 0)
return (NULL);
}
while (sc != c);
}
while (strncmp(s, find, len) != 0);
s--;
}
return ((char *)s);
}
#endif
#ifdef use_regexp
int regstrcmp(const char *subjstring, const char *pstring)
{
pcre2_code *re;
PCRE2_SPTR pattern; /* PCRE2_SPTR is a pointer to unsigned code units of */
PCRE2_SPTR subject; /* the appropriate width (in this case, 8 bits). */
int errornumber;
int rc;
PCRE2_SIZE erroroffset;
size_t subject_length;
pcre2_match_data *match_data;
/* As pattern and subject are char arguments, they can be straightforwardly
cast to PCRE2_SPTR as we are working in 8-bit code units. */
pattern = (PCRE2_SPTR)pstring;
subject = (PCRE2_SPTR)subjstring;
subject_length = strlen((char *)subject);
/*************************************************************************
* Now we are going to compile the regular expression pattern, and handle *
* any errors that are detected. *
*************************************************************************/
re = pcre2_compile(
pattern, /* the pattern */
PCRE2_ZERO_TERMINATED, /* indicates pattern is zero-terminated */
0, /* default options */
&errornumber, /* for error number */
&erroroffset, /* for error offset */
NULL); /* use default compile context */
/* Compilation failed: print the error message and exit. */ /* This should not happen */
if (re == NULL)
{
PCRE2_UCHAR buffer[256];
pcre2_get_error_message(errornumber, buffer, sizeof(buffer));
printf(_("PCRE2 compilation failed at offset %d: %s\n"), (int)erroroffset,buffer);
return 1;
}
/*************************************************************************
* If the compilation succeeded, we call PCRE again, in order to do a *
* pattern match against the subject string. This does just ONE match. #
* Before running the match we must set up a match_data block for holding *
* the result. #
*************************************************************************/
/* Using this function ensures that the block is exactly the right size for
the number of capturing parentheses in the pattern. */
match_data = pcre2_match_data_create_from_pattern(re, NULL);
rc = pcre2_match(
re, /* the compiled pattern */
subject, /* the subject string */
subject_length, /* the length of the subject */
0, /* start at offset 0 in the subject */
0, /* default options */
match_data, /* block for storing the result */
NULL); /* use default match context */
/* Matching failed: handle error cases */
if (rc < 0)
{
switch(rc)
{
// case PCRE2_ERROR_NOMATCH: printf("No match\n"); break;
case PCRE2_ERROR_NOMATCH: break;
/*
Handle other special cases if you like
*/
default: printf(_("Matching error %d\n"), rc); break;
}
pcre2_match_data_free(match_data); /* Release memory used for the match */
pcre2_code_free(re); /* data and the compiled pattern. */
return 1;
}
pcre2_match_data_free(match_data); /* Release the memory that was used */
pcre2_code_free(re); /* for the match data and the pattern. */
return 0; /* Exit the function. */
}
#endif
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