Debian 3.9.10debian/3.9.10debian

1 files changed, 111 insertions, 0 deletions

diff --git a/qa/src/anon-sa.c b/qa/src/anon-sa.c
new file mode 100644
index 0000000..2d5672e
--- /dev/null
+++ b/qa/src/anon-sa.c
@@ -0,0 +1,111 @@
+/*
+ * Anonymise binary sa data files: rewrite sa files
+ * from users that are suitable for sharing/qa'ing.
+ *
+ * When sniffing out starting offsets of hostnames,
+ * something like this command can prove handy:
+ *   dd if=rhel5-sa20.bin bs=1 skip=109 count=100
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define SA_UTSNAME_LEN	65
+
+long
+seek_magic_and_reposition_for_hostname(int fd)
+{
+    int i;
+    unsigned short sa_magic;
+
+    struct magic {
+	unsigned short	magic_offset;
+
+	/* check magic - not endian neutral in sa ...  :| */
+	unsigned short	numeric;
+	unsigned short	swabbed;
+
+	/* fortunately, all same length so far (65 bytes) */
+	unsigned long	utsname_offset;
+    } magic[] = {
+	{  0, 0xd596, 0xd596,  89 },	/* sysstat-9.x & -10.x */
+	{ 40, 0x216e, 0x6e21,  113 },	/* sysstat-8.x */
+	{ 36, 0x2169, 0x6921,  109 },	/* sysstat-7.x */
+    };
+
+    for (i = 0; i < sizeof(magic) / sizeof(struct magic); i++) {
+	if ((lseek(fd, magic[i].magic_offset, SEEK_SET)) < 0) {
+	    perror("lseek magic");
+	    continue;
+	}
+	if (read(fd, &sa_magic, sizeof(sa_magic)) < 0) {
+	    perror("read magic");
+	    continue;
+	}
+	if (sa_magic == magic[i].numeric || sa_magic == magic[i].swabbed) {
+	    if ((lseek(fd, magic[i].utsname_offset, SEEK_SET)) < 0) {
+		perror("hostname lseek");
+		return -1;
+	    }
+	    return magic[i].utsname_offset;	/* all good */
+	}
+    }
+    printf("  non-sa data file - cannot find any sa magic - ignored\n");
+    return -1;
+}
+
+int main(int argc, char **argv)
+{
+    int count, fixit = 0, updates = 0;
+
+    for (count = 1; count < argc; count++) {
+	char hostname[SA_UTSNAME_LEN] = { 0 };
+	char *file = argv[count];
+	int fd, bytes, length;
+	long offset;
+
+	if (strcmp(file, "-f") == 0) {
+	    fixit = 1;
+	    continue;
+	}
+	printf("Filename: %s\n", file);
+	if ((fd = open(file, O_RDWR)) < 0) {
+	    perror("open");
+	    continue;
+	}
+	if ((offset = seek_magic_and_reposition_for_hostname(fd)) < 0) {
+	    close(fd);
+	    continue;
+	}
+	if ((bytes = read(fd, hostname, sizeof(hostname))) < 0) {
+	    perror("read");
+	    close(fd);
+	    continue;
+	}
+	hostname[sizeof(hostname)-1] = '\0';
+	length = strlen(hostname);
+	printf("  hostname: %s (%d bytes)\n", hostname, length);
+
+	if (fixit) {
+	    memset(hostname, 0, length);	// clear old name
+	    strcpy(hostname, "pcp.qa.org");	// reset it
+	    if ((lseek(fd, offset, SEEK_SET)) < 0) {
+		perror("lseek2");
+		close(fd);
+		continue;
+	    }
+	    if (write(fd, hostname, length) < 0) {
+		perror("write");
+		close(fd);
+		continue;
+	    }
+	    updates++;
+	}
+	close(fd);
+    }
+    printf("%d files scanned, %d files updated\n", count-1-fixit, updates);
+    return 0;
+}