1 files changed, 94 insertions, 0 deletions
diff --git a/pyanaconda/isys/mem.c b/pyanaconda/isys/mem.c
new file mode 100644
index 000000000..3003ba055
--- /dev/null
+++ b/pyanaconda/isys/mem.c
@@ -0,0 +1,94 @@
+/*
+ * mem.c - memory checking
+ *
+ * Copyright (C) 2010
+ * Red Hat, 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "mem.h"
+#include "log.h"
+
+/* look for available memory.  note: won't ever report more than the 
+ * 900 megs or so supported by the -BOOT kernel due to not using e820 */
+int totalMemory(void) {
+    int fd;
+    int bytesRead;
+    char buf[4096];
+    char * chptr, * start;
+    int total = 0;
+
+    fd = open("/proc/meminfo", O_RDONLY);
+    if (fd < 0) {
+        logMessage(ERROR, "failed to open /proc/meminfo: %m");
+        return 0;
+    }
+
+    bytesRead = read(fd, buf, sizeof(buf) - 1);
+    if (bytesRead < 0) {
+        logMessage(ERROR, "failed to read from /proc/meminfo: %m");
+        close(fd);
+        return 0;
+    }
+
+    close(fd);
+    buf[bytesRead] = '\0';
+
+    chptr = buf;
+    while (*chptr && !total) {
+        if (strncmp(chptr, "MemTotal:", 9)) {
+            chptr++;
+            continue;
+        }
+
+        start = ++chptr ;
+        while (*chptr && *chptr != '\n') chptr++;
+
+        *chptr = '\0';
+
+        while (!isdigit(*start) && *start) start++;
+        if (!*start) {
+            logMessage(WARNING, "no number appears after MemTotal tag");
+            return 0;
+        }
+
+        chptr = start;
+        while (*chptr && isdigit(*chptr)) {
+            total = (total * 10) + (*chptr - '0');
+            chptr++;
+        }
+    }
+
+    /*Because /proc/meminfo only gives us the MemTotal (total physical RAM minus
+    the kernel binary code), we need to round this up. Assuming every machine
+    has the total RAM MB number divisible by 128. */
+    total /= 1024;
+    total = (total / 128 + 1) * 128;
+    total *= 1024;
+
+    logMessage(INFO, "%d kB are available", total);
+
+    return total;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4: */