Add a -s option which specifies a number of entries to skip.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2572 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishlog/varnishlog.1

@@ -28,7 +28,7 @@
 .\"
 .\" $Id$
 .\"
-.Dd November 8, 2007
+.Dd March 8, 2008
 .Dt VARNISHLOG 1
 .Os
 .Sh NAME
@@ -48,6 +48,7 @@
 .Op Fl o
 .Op Fl P Ar file
 .Op Fl r Ar file
+.Op Fl s Ar num
 .Op Fl V
 .Op Fl w Ar file
 .Op Fl X Ar regex
@@ -126,6 +127,10 @@ Write the process's PID to the specified
 Read log entries from
 .Ar file
 instead of shared memory.
+.It Fl s Ar num
+Skip the first
+.Ar num
+log records.
 .It Fl V
 Display the version number and exit.
 .It Fl w Ar file

include/varnishapi.h

@@ -44,8 +44,8 @@ int base64_decode(char *d, unsigned dlen, const char *s);
 typedef int vsl_handler(void *priv, enum shmlogtag tag, unsigned fd, unsigned len, unsigned spec, const char *ptr);
 #define VSL_S_CLIENT	(1 << 0)
 #define VSL_S_BACKEND	(1 << 1)
-#define VSL_ARGS	"bCcdI:i:r:X:x:"
-#define VSL_USAGE	"[-bCcd] [-i tag] [-I regexp] [-r file] [-X regexp] [-x tag]"
+#define VSL_ARGS	"bCcdI:i:r:s:X:x:"
+#define VSL_USAGE	"[-bCcd] [-i tag] [-I regexp] [-r file] [-s skip] [-X regexp] [-x tag]"
 vsl_handler VSL_H_Print;
 struct VSL_data;
 struct VSL_data *VSL_New(void);

lib/libvarnishapi/shmlog.c

@@ -85,6 +85,8 @@ struct VSL_data {
 	int			regflags;
 	regex_t			*regincl;
 	regex_t			*regexcl;
+
+	unsigned long		skip;
 };
 
 #ifndef MAP_HASSEMAPHORE
@@ -292,6 +294,10 @@ VSL_NextLog(struct VSL_data *vd, unsigned char **pp)
 		default:
 			break;
 		}
+		if (vd->skip) {
+			--vd->skip;
+			continue;
+		}
 		if (vd->map[p[SHMLOG_TAG]] & M_SELECT) {
 			*pp = p;
 			return (1);
@@ -478,6 +484,26 @@ vsl_ix_arg(struct VSL_data *vd, const char *opt, int arg)
 
 /*--------------------------------------------------------------------*/
 
+static int
+vsl_s_arg(struct VSL_data *vd, const char *opt)
+{
+	char *end;
+
+	CHECK_OBJ_NOTNULL(vd, VSL_MAGIC);
+	if (*opt == '\0') {
+		fprintf(stderr, "number required for -s\n");
+		return (-1);
+	}
+	vd->skip = strtoul(opt, &end, 10);
+	if (*end != '\0') {
+		fprintf(stderr, "invalid number for -s\n");
+		return (-1);
+	}
+	return (1);
+}
+
+/*--------------------------------------------------------------------*/
+
 int
 VSL_Arg(struct VSL_data *vd, int arg, const char *opt)
 {
@@ -491,6 +517,7 @@ VSL_Arg(struct VSL_data *vd, int arg, const char *opt)
 	case 'r': return (vsl_r_arg(vd, opt));
 	case 'I': case 'X': return (vsl_IX_arg(vd, opt, arg));
 	case 'C': vd->regflags = REG_ICASE; return (1);
+	case 's': return (vsl_s_arg(vd, opt));
 	default:
 		return (0);
 	}