--- embedtools/src/Attic/clog.c	2010/09/28 15:02:55	1.1
+++ embedtools/src/Attic/clog.c	2011/06/08 12:45:41	1.2
@@ -0,0 +1,199 @@
+#include "global.h"
+#include "clog.h"
+
+
+int Verbose;
+extern char compiled[], compiledby[], compilehost[];
+
+
+static void
+Usage()
+{
+
+	printf(	"cLOG is tool for managment syslogd operation with circular logs\n"
+		"=== %s === %s@%s ===\n\n"
+		"  Syntax: clog [options] <file.log>\n\n"
+		"\t-v\t\tVerbose, more -vv more verbosity\n"
+		"\t-i\t\tInit file.log, create and prepare for use\n"
+		"\t-s <size>\tUse with init for set needed file.log size\n"
+		"\t-m <perm>\tUse permissions with init for set file.log\n"
+		"\t-f\t\tRead and follow log file.log\n"
+		"\n", compiled, compiledby, compilehost);
+}
+
+static int
+initlog(const char *csLog, size_t size, int mode)
+{
+	int f, ret = -1, fill = size;
+	struct clogFooter cf = { 0 };
+	char buffer[BUFLEN] = { 0 };
+
+	memcpy(&cf.cf_magic, MAGIC, sizeof cf.cf_magic);
+	cf.cf_max = size - sizeof cf;
+
+	f = open(csLog, O_WRONLY | O_CREAT | O_TRUNC, mode);
+	if (f == -1) {
+		printf("Error:: in open log %s #%d - %s\n", csLog, errno, strerror(errno));
+		return -1;
+	} else
+		VERB(1) printf("Verbose:: Create log %s\n", csLog);
+	while (fill > BUFLEN)
+		if (write(f, buffer, BUFLEN) == -1) {
+			printf("Error:: in fill log %s #%d - %s\n", csLog, errno, strerror(errno));
+			goto end;
+		} else
+			fill -= BUFLEN;
+	if (fill > BUFLEN) {
+		printf("Error:: in fill log %s uninspected result!!!\n", csLog);
+		goto end;
+	} else if (fill && write(f, buffer, fill) == -1) {
+		printf("Error:: in last fill log %s #%d - %s\n", csLog, errno, strerror(errno));
+		goto end;
+	}
+	// return to write cfooter
+	if (lseek(f, -(off_t)(sizeof cf), SEEK_END) == -1) {
+		printf("Error:: can`t set position for write footer #%d - %s\n", errno, strerror(errno));
+		goto end;
+	}
+	if (write(f, &cf, sizeof cf) == -1) {
+		printf("Error:: in footer log %s #%d - %s\n", csLog, errno, strerror(errno));
+		goto end;
+	}
+
+	ret = 0;
+	VERB(1) printf("Verbose:: Init done.\n");
+end:
+	close(f);
+	return ret;
+}
+
+static int
+readlog(const char *csLog, char m)
+{
+	int f, cx;
+	size_t end;
+	struct clogFooter *cf;
+	char *buffer = NULL;
+	uint32_t next, start = 0;
+	struct iovec iov[2];
+	struct pollfd pfd = { 0 };
+
+	f = open(csLog, O_RDONLY);
+	if (f == -1) {
+		printf("Error:: in open read %s #%d - %s\n", csLog, errno, strerror(errno));
+		return -1;
+	} else
+		VERB(1) printf("Verbose:: Opened log %s\n", csLog);
+	end = lseek(f, 0, SEEK_END);
+	if (end == -1) {
+		printf("Error:: in get size %s #%d - %s\n", csLog, errno, strerror(errno));
+		close(f);
+		return -1;
+	} else
+		lseek(f, 0, SEEK_SET);
+	VERB(2) printf("Verbose(2):: Get file size %lu\n", (u_long) end);
+	buffer = mmap(NULL, end, PROT_READ, MAP_SHARED, f, 0);
+	if (!buffer) {
+		printf("Error:: in map %s #%d - %s\n", csLog, errno, strerror(errno));
+		close(f);
+		return -1;
+	} else {
+		close(f);
+
+		cf = (struct clogFooter*) (buffer + end - sizeof(struct clogFooter));
+		VERB(3) printf("Verbose(3):: Map file to address %p and footer %p\n", buffer, cf);
+	}
+
+	if (cf->cf_wrap == 1)
+		start = cf->cf_next + 1;
+	VERB(3) printf("Verbose(3):: wrapped log? %d\n", cf->cf_wrap);
+	do {
+		cx = 0;
+		while (cf->cf_lock == 1)
+			sched_yield();
+		next = cf->cf_next;
+
+		if (start > next) {
+			iov[cx].iov_base = buffer + start;
+			iov[cx++].iov_len = cf->cf_max - start;
+			start = 0;
+		}
+		iov[cx].iov_base = buffer + start;
+		iov[cx++].iov_len = next - start;
+		start = next;
+		writev(1, iov, cx);
+		if (!(m & 2))
+			break;
+		if (poll(&pfd, 1, 50) == -1) {
+			printf("Error:: in poll %s #%d - %s\n", csLog, errno, strerror(errno));
+			munmap(buffer, end);
+			return -1;
+		}
+	} while (42);
+
+	munmap(buffer, end);
+	VERB(1) printf("Verbose:: Read done.\n");
+	return 0;
+}
+
+
+int
+main(int argc, char **argv)
+{
+	char ch, m = 0, szLog[MAXPATHLEN];
+	size_t siz = 0;
+	int mode = 0644;
+
+	while ((ch = getopt(argc, argv, "hm:vfis:")) != -1)
+		switch (ch) {
+			case 'm':
+				mode = strtol(optarg, NULL, 0);
+				break;
+			case 'v':
+				Verbose++;
+				break;
+			case 'i':
+				m |= 1;
+				break;
+			case 'f':
+				m |= 2;
+				break;
+			case 's':
+				siz = strtol(optarg, NULL, 0);
+				if (siz < 1) {
+					printf("Error:: size is invalid %lu!\n", (u_long) siz);
+					Usage();
+					return 1;
+				}
+				break;
+			case 'h':
+			default:
+				Usage();
+				return 1;
+		}
+	argc -= optind;
+	argv += optind;
+	if (m & 1 && !siz) {
+		printf("Error:: not specified size when use with init log!\n");
+		Usage();
+		return 1;
+	}
+	if (m == 3) {
+		printf("Error:: can`t in same time init and force!\n");
+		Usage();
+		return 1;
+	}
+	if (!argc) {
+		printf("Error:: not specified log file!\n");
+		Usage();
+		return 1;
+	} else
+		strlcpy(szLog, *argv, MAXPATHLEN);
+
+	if (m & 1 && initlog(szLog, siz, mode) == -1)
+		return 2;
+	if (readlog(szLog, m) == -1)
+		return 3;
+
+	return 0;
+}