gathering up all the shit i've made so far

1 files changed, 145 insertions, 0 deletions

diff --git a/lastlog.c b/lastlog.c
new file mode 100644
index 0000000..9036527
--- /dev/null
+++ b/lastlog.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 1989 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2000 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2011, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <getopt.h>
+#include <lastlog.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+#include <math.h>
+#include <sys/param.h>
+
+/*
+ * Needed for MkLinux DR1/2/2.1 - J.
+ */
+#ifndef LASTLOG_FILE
+#define LASTLOG_FILE "/var/log/lastlog"
+#endif
+
+/*
+ * Global variables
+ */
+const char *Prog;		/* Program name */
+static FILE *lastlogfile;	/* lastlog file stream */
+static struct stat statbuf;	/* fstat buffer for file size */
+
+// TODO just put that in a variable...
+#define	NOW	(time ((time_t *) 0))
+
+static void print_one(const struct passwd *pw)
+{
+	char *cp;
+	struct tm *tm;
+	time_t ll_time;
+	off_t offset;
+	struct lastlog ll;
+	char ptime[80];
+
+	if (NULL == pw) {
+		return;
+	}
+
+	offset = (off_t) pw->pw_uid * sizeof(ll);
+	if (offset + sizeof(ll) <= statbuf.st_size) {
+		/* fseeko errors are not really relevant for us. */
+		int err = fseeko(lastlogfile, offset, SEEK_SET);
+		assert(0 == err);
+		/* lastlog is a sparse file. Even if no entries were
+		 * entered for this user, which should be able to get the
+		 * empty entry in this case.
+		 */
+		if (fread((char *) &ll, sizeof(ll), 1, lastlogfile) != 1) {
+			return;
+		}
+	} else {
+		/* Outsize of the lastlog file.
+		 * Behave as if there were a missing entry (same behavior
+		 * as if we were reading an non existing entry in the
+		 * sparse lastlog file).
+		 */
+		memset(&ll, 0, sizeof(ll));
+	}
+
+
+	ll_time = ll.ll_time;
+	tm = localtime(&ll_time);
+	strftime(ptime, sizeof(ptime), "%a %b %e %H:%M:%S %z %Y", tm);
+	cp = ptime;
+
+	if (ll.ll_time == (time_t) 0) {
+		cp = "**Never logged in**\0";
+	}
+	int ago = NOW-ll.ll_time;
+	float f = 1.0 - ((float)ago) / ((float)(60*60*24*365*5));
+	if (f < 0.0) f = 0.0;
+	f = pow(f, 3.0);
+	float a = 80.0;
+	float b = 2.5;
+	f = MAX(f * f / b, f * a - a + 1.0);
+	float hue = f * 90.0 + 260.;
+	printf("<a href=\"/~%s\" title=\"%s\" style=\"background: hsl(%fdeg %f%% %f%%)\"></a>\n", pw->pw_name, pw->pw_name, hue, 20. + f*70., 10. + f*90.);
+}
+
+int main(void)
+{
+	const struct passwd *pwent;
+
+	lastlogfile = fopen(LASTLOG_FILE, "r");
+	if (NULL == lastlogfile) {
+		perror(LASTLOG_FILE);
+		exit(EXIT_FAILURE);
+	}
+
+	/* Get the lastlog size */
+	if (fstat(fileno(lastlogfile), &statbuf) != 0) {
+		err(1, "can't get lastlog size");
+	}
+
+	setpwent();
+	while ( (pwent = getpwent()) != NULL ) {
+		print_one(pwent);
+	}
+	endpwent();
+
+	(void) fclose(lastlogfile);
+
+	return EXIT_SUCCESS;
+}
+