[just for fun] add support to uname in coreutils-5.97 for parsing /proc/cpuinfo on Linux

[Mike Frysinger]

again, this isnt meant for inclusion, just for those who would find such a 
thing useful

this patch includes support for more architectures and fixes a possible buffer 
overflow ... previously, it was assumed that the key (and included 
whitespace) would not exceed 63 bytes and that the value (and included 
whitespace) would not exceed 256 bytes.  although this is highly unlikely to 
appear in the /proc/cpuinfo, it's a bug none the less ;)

this version reads just the first 64 bytes of the key and the first 256 bytes 
of the value and throws away the rest
-mike

pgpC03EULT7bb.pgp
Description: PGP signature

On linux platforms, grok /proc/cpuinfo for the CPU/vendor info.

Prob not suitable for upstream seeing as how it's 100% linux-specific
http://lists.gnu.org/archive/html/bug-coreutils/2005-09/msg00063.html

Patch originally by Carlos E. Gorges <address@hidden>, but 
heavily reworked to suck less.

To add support for additional platforms, check out the show_cpuinfo()
func in the linux/arch/<ARCH>/ source tree of the kernel.

--- coreutils/src/uname.c
+++ coreutils/src/uname.c
@@ -51,6 +51,11 @@
 # include <mach-o/arch.h>
 #endif
 
+#if defined (__linux__)
+# define USE_PROCINFO
+# define UNAME_HARDWARE_PLATFORM
+#endif
+
 #include "system.h"
 #include "error.h"
 #include "quote.h"
@@ -138,6 +143,106 @@
   exit (status);
 }
 
+#if defined(USE_PROCINFO)
+
+# if defined(__s390__) || defined(__s390x__)
+#  define CPUINFO_FILE    "/proc/sysinfo"
+#  define CPUINFO_FORMAT  "%64[^\t :]%*[ :]%256[^\n]%c"
+# else
+#  define CPUINFO_FILE    "/proc/cpuinfo"
+#  define CPUINFO_FORMAT  "%64[^\t:]\t:%256[^\n]%c"
+# endif
+
+# define PROCINFO_PROCESSOR      0
+# define PROCINFO_HARDWARE_PLATFORM 1
+
+static void __eat_cpuinfo_space(char *buf)
+{
+       /* first eat trailing space */
+       char *tmp = buf + strlen(buf) - 1;
+       while (tmp > buf && isspace(*tmp))
+               *tmp-- = '\0';
+       /* then eat leading space */
+       tmp = buf;
+       while (*tmp && isspace(*tmp))
+               tmp++;
+       if (tmp != buf)
+               memmove(buf, tmp, strlen(tmp)+1);
+}
+
+static int __linux_procinfo (int x, char *fstr, size_t s)
+{
+       FILE *fp;
+
+       char *procinfo_keys[] = {
+               /* --processor --hardware-platform */
+               #if defined(__alpha__)
+                       "cpu model", "system type"
+               #elif defined(__arm__)
+                       "Processor", "Hardware"
+               #elif defined(bfin)
+                       "CPU", "BOARD Name"
+               #elif defined(__cris__)
+                       "cpu", "cpu model"
+               #elif defined(__frv__)
+                       "CPU-Core", "System"
+               #elif defined(__i386__) || defined(__x86_64__)
+                       "model name", "vendor_id"
+               #elif defined(__ia64__)
+                       "family", "vendor"
+               #elif defined(__hppa__)
+                       "cpu", "model"
+               #elif defined(__m68k__)
+                       "CPU", "MMU"
+               #elif defined(__mips__)
+                       "cpu model", "system type"
+               #elif defined(__powerpc__) || defined(__powerpc64__)
+                       "cpu", "machine"
+               #elif defined(__s390__) || defined(__s390x__)
+                       "Type", "Manufacturer"
+               #elif defined(__sh__)
+                       "cpu type", "machine"
+               #elif defined(sparc) || defined(__sparc__)
+                       "type", "cpu"
+               #elif defined(__vax__)
+                       "cpu type", "cpu"
+               #else
+                       "unknown", "unknown"
+               #endif
+       };
+
+       if ((fp = fopen(CPUINFO_FILE, "r")) != NULL) {
+               char key[65], value[257], eol, *ret = NULL;
+
+               while (fscanf(fp, CPUINFO_FORMAT, key, value, &eol) != EOF) {
+                       __eat_cpuinfo_space(key);
+                       if (!strcmp(key, procinfo_keys[x])) {
+                               __eat_cpuinfo_space(value);
+                               ret = value;
+                               break;
+                       }
+                       if (eol != '\n') {
+                               /* we need two fscanf's here in case the 
previous
+                                * length limit caused us to read right up to 
the
+                                * newline ... doing "%*[^\n]\n" wont eat the 
newline
+                                */
+                               fscanf(fp, "%*[^\n]");
+                               fscanf(fp, "\n");
+                       }
+               }
+               fclose(fp);
+
+               if (ret) {
+                       strncpy(fstr, ret, s);
+                       return 0;
+               }
+       }
+
+       return -1;
+}
+
+#endif
+
 /* Print ELEMENT, preceded by a space if something has already been
    printed.  */
 
@@ -250,10 +344,14 @@ main (int argc, char **argv)
   if (toprint & PRINT_PROCESSOR)
     {
       char const *element = unknown;
-#if HAVE_SYSINFO && defined SI_ARCHITECTURE
+#if ( HAVE_SYSINFO && defined SI_ARCHITECTURE ) || defined(USE_PROCINFO)
       {
        static char processor[257];
+#if defined(USE_PROCINFO)
+       if (0 <= __linux_procinfo (PROCINFO_PROCESSOR, processor, sizeof 
processor))
+#else
        if (0 <= sysinfo (SI_ARCHITECTURE, processor, sizeof processor))
+#endif
          element = processor;
       }
 #endif
@@ -306,9 +404,13 @@ main (int argc, char **argv)
       if (element == unknown)
        {
          static char hardware_platform[257];
+#if defined(USE_PROCINFO)
+         if (0 <= __linux_procinfo (PROCINFO_HARDWARE_PLATFORM, 
hardware_platform, sizeof hardware_platform))
+#else
          size_t s = sizeof hardware_platform;
          static int mib[] = { CTL_HW, UNAME_HARDWARE_PLATFORM };
          if (sysctl (mib, 2, hardware_platform, &s, 0, 0) >= 0)
+#endif
            element = hardware_platform;
        }
 #endif