diff --git a/.config-device b/.config-device
index 888db93..dd7b2ef 100644
--- a/.config-device
+++ b/.config-device
@@ -144,7 +144,9 @@
 # CONFIG_HELLO is not set
 CONFIG_HELP_EXTRAS=y
 CONFIG_HELP=y
+# CONFIG_HEXDUMP is not set
 # CONFIG_HEXEDIT is not set
+# CONFIG_HD is not set
 # CONFIG_HOSTID is not set
 # CONFIG_HOST is not set
 CONFIG_HOSTNAME=y
diff --git a/.config-linux b/.config-linux
index 493cee1..3b1c23f 100644
--- a/.config-linux
+++ b/.config-linux
@@ -142,7 +142,9 @@
 # CONFIG_HELLO is not set
 # CONFIG_HELP_EXTRAS is not set
 # CONFIG_HELP is not set
+# CONFIG_HEXDUMP is not set
 # CONFIG_HEXEDIT is not set
+# CONFIG_HD is not set
 # CONFIG_HOSTID is not set
 # CONFIG_HOST is not set
 CONFIG_HOSTNAME=y
diff --git a/.config-mac b/.config-mac
index 30cdb16..8947f28 100644
--- a/.config-mac
+++ b/.config-mac
@@ -142,7 +142,9 @@
 # CONFIG_HELLO is not set
 # CONFIG_HELP_EXTRAS is not set
 # CONFIG_HELP is not set
+# CONFIG_HEXDUMP is not set
 # CONFIG_HEXEDIT is not set
+# CONFIG_HD is not set
 # CONFIG_HOSTID is not set
 # CONFIG_HOST is not set
 CONFIG_HOSTNAME=y
diff --git a/Android.bp b/Android.bp
index 4e5f397..a4987c7 100644
--- a/Android.bp
+++ b/Android.bp
@@ -462,6 +462,9 @@
                 // also getting from <sys/param.h>.
                 "-Wno-macro-redefined",
             ],
+            ldflags: [
+                "-Wl,-dead_strip",
+            ],
         },
 
         linux: {
diff --git a/METADATA b/METADATA
index de06cbe..5aa1a36 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@
     type: GIT
     value: "https://github.com/landley/toybox"
   }
-  version: "340b1cf8f79cc9ea7232453e0052d2418c806103"
+  version: "1986075975db4cdab08133f8299ad72dd5af4b23"
   license_type: UNENCUMBERED
   last_upgrade_date {
     year: 2021
-    month: 9
-    day: 30
+    month: 10
+    day: 6
   }
 }
diff --git a/android/device/generated/config.h b/android/device/generated/config.h
index 7558a5b..fa21fed 100644
--- a/android/device/generated/config.h
+++ b/android/device/generated/config.h
@@ -262,8 +262,12 @@
 #define USE_HELP_EXTRAS(...) __VA_ARGS__
 #define CFG_HELP 1
 #define USE_HELP(...) __VA_ARGS__
+#define CFG_HEXDUMP 0
+#define USE_HEXDUMP(...)
 #define CFG_HEXEDIT 0
 #define USE_HEXEDIT(...)
+#define CFG_HD 0
+#define USE_HD(...)
 #define CFG_HOSTID 0
 #define USE_HOSTID(...)
 #define CFG_HOST 0
diff --git a/android/device/generated/flags.h b/android/device/generated/flags.h
index 641112e..809a29b 100644
--- a/android/device/generated/flags.h
+++ b/android/device/generated/flags.h
@@ -1267,6 +1267,23 @@
 #undef FLAG_a
 #endif
 
+// hexdump   bcCdn#<0os#<0vx[!bcCdox]
+#undef OPTSTR_hexdump
+#define OPTSTR_hexdump "bcCdn#<0os#<0vx[!bcCdox]"
+#ifdef CLEANUP_hexdump
+#undef CLEANUP_hexdump
+#undef FOR_hexdump
+#undef FLAG_x
+#undef FLAG_v
+#undef FLAG_s
+#undef FLAG_o
+#undef FLAG_n
+#undef FLAG_d
+#undef FLAG_C
+#undef FLAG_c
+#undef FLAG_b
+#endif
+
 // hexedit   <1>1r
 #undef OPTSTR_hexedit
 #define OPTSTR_hexedit "<1>1r"
@@ -2256,9 +2273,9 @@
 #undef FLAG_c
 #endif
 
-// pidof <1so:x <1so:x
+// pidof so:x so:x
 #undef OPTSTR_pidof
-#define OPTSTR_pidof "<1so:x"
+#define OPTSTR_pidof "so:x"
 #ifdef CLEANUP_pidof
 #undef CLEANUP_pidof
 #undef FOR_pidof
@@ -4709,6 +4726,21 @@
 #define FLAG_a (1<<2)
 #endif
 
+#ifdef FOR_hexdump
+#ifndef TT
+#define TT this.hexdump
+#endif
+#define FLAG_x (FORCED_FLAG<<0)
+#define FLAG_v (FORCED_FLAG<<1)
+#define FLAG_s (FORCED_FLAG<<2)
+#define FLAG_o (FORCED_FLAG<<3)
+#define FLAG_n (FORCED_FLAG<<4)
+#define FLAG_d (FORCED_FLAG<<5)
+#define FLAG_C (FORCED_FLAG<<6)
+#define FLAG_c (FORCED_FLAG<<7)
+#define FLAG_b (FORCED_FLAG<<8)
+#endif
+
 #ifdef FOR_hexedit
 #ifndef TT
 #define TT this.hexedit
diff --git a/android/device/generated/globals.h b/android/device/generated/globals.h
index 1eede5a..cb86614 100644
--- a/android/device/generated/globals.h
+++ b/android/device/generated/globals.h
@@ -117,7 +117,7 @@
 // toys/lsb/pidof.c
 
 struct pidof_data {
-  char *omit;
+  char *o;
 };
 
 // toys/lsb/seq.c
@@ -722,6 +722,19 @@
   long gid;
 };
 
+// toys/pending/hexdump.c
+
+struct hexdump_data {
+    long s, n;
+
+    long long len, pos, ppos;
+    const char *fmt;
+    unsigned int fn, bc;  // file number and byte count
+    char linebuf[16];  // line buffer - serves double duty for sqeezing repeat
+                       // lines and for accumulating full lines accross file
+                       // boundaries if necessesary.
+};
+
 // toys/pending/host.c
 
 struct host_data {
@@ -1676,6 +1689,7 @@
 	struct getopt_data getopt;
 	struct getty_data getty;
 	struct groupadd_data groupadd;
+	struct hexdump_data hexdump;
 	struct host_data host;
 	struct ip_data ip;
 	struct ipcrm_data ipcrm;
diff --git a/android/device/generated/help.h b/android/device/generated/help.h
index 9a533c6..52624b8 100644
--- a/android/device/generated/help.h
+++ b/android/device/generated/help.h
@@ -72,7 +72,7 @@
 
 #define HELP_seq "usage: seq [-w|-f fmt_str] [-s sep_str] [first] [increment] last\n\nCount from first to last, by increment. Omitted arguments default\nto 1. Two arguments are used as first and last. Arguments can be\nnegative or floating point.\n\n-f	Use fmt_str as a printf-style floating point format string\n-s	Use sep_str as separator, default is a newline character\n-w	Pad to equal width with leading zeroes"
 
-#define HELP_pidof "usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME]...\n\nPrint the PIDs of all processes with the given names.\n\n-s	Single shot, only return one pid\n-o	Omit PID(s)\n-x	Match shell scripts too"
+#define HELP_pidof "usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME...]\n\nPrint the PIDs of all processes with the given names.\n\n-o	Omit PID(s)\n-s	Single shot, only return one pid\n-x	Match shell scripts too"
 
 #define HELP_passwd_sad "Password changes are checked to make sure they're at least 6 chars long,\ndon't include the entire username (but not a subset of it), or the entire\nprevious password (but changing password1, password2, password3 is fine).\nThis heuristic accepts \"aaaaaa\" and \"123456\"."
 
@@ -430,6 +430,10 @@
 
 #define HELP_host "usage: host [-av] [-t TYPE] NAME [SERVER]\n\nPerform DNS lookup on NAME, which can be a domain name to lookup,\nor an IPv4 dotted or IPv6 colon-separated address to reverse lookup.\nSERVER (if present) is the DNS server to use.\n\n-a	-v -t ANY\n-t TYPE	query records of type TYPE\n-v	verbose"
 
+#define HELP_hd "usage: hd [FILE...]\n\nDisplay file(s) in cannonical hex+ASCII format."
+
+#define HELP_hexdump "usage: hexdump [-bcCdovx] [-n LEN] [-s SKIP] [FILE...]\n\nDump file(s) in hexadecimal format.\n\n-n LEN	Show LEN bytes of output\n-s SKIP	Skip bytes of input\n-v	Verbose (don't combine identical lines)\n\nDisplay type:\n-b One byte octal   -c One byte character -C Canonical (hex + ASCII)\n-d Two byte decimal -o Two byte octal     -x Two byte hexadecimal (default)"
+
 #define HELP_groupdel "usage: groupdel [USER] GROUP\n\nDelete a group or remove a user from a group"
 
 #define HELP_groupadd "usage: groupadd [-S] [-g GID] [USER] GROUP\n\nAdd a group or add a user to a group\n\n  -g GID Group id\n  -S     Create a system group"
diff --git a/android/device/generated/newtoys.h b/android/device/generated/newtoys.h
index ecbabab..81d4725 100644
--- a/android/device/generated/newtoys.h
+++ b/android/device/generated/newtoys.h
@@ -109,9 +109,11 @@
 USE_GUNZIP(NEWTOY(gunzip, "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_GZIP(NEWTOY(gzip,    "ncdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_REBOOT(OLDTOY(halt, reboot, TOYFLAG_SBIN|TOYFLAG_NEEDROOT))
+USE_HD(OLDTOY(hd, hexdump, TOYFLAG_USR|TOYFLAG_BIN))
 USE_HEAD(NEWTOY(head, "?n(lines)#<0=10c(bytes)#<0qv[-nc]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HELLO(NEWTOY(hello, 0, TOYFLAG_USR|TOYFLAG_BIN))
 USE_HELP(NEWTOY(help, "ahu", TOYFLAG_BIN|TOYFLAG_MAYFORK))
+USE_HEXDUMP(NEWTOY(hexdump, "bcCdn#<0os#<0vx[!bcCdox]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HEXEDIT(NEWTOY(hexedit, "<1>1r", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 USE_HOST(NEWTOY(host, "<1>2avt:", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HOSTID(NEWTOY(hostid, ">0", TOYFLAG_USR|TOYFLAG_BIN))
@@ -199,7 +201,7 @@
 USE_PASTE(NEWTOY(paste, "d:s", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 USE_PATCH(NEWTOY(patch, ">2(no-backup-if-mismatch)(dry-run)"USE_TOYBOX_DEBUG("x")"F#g#fulp#d:i:Rs(quiet)", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PGREP(NEWTOY(pgrep, "?cld:u*U*t*s*P*g*G*fnovxL:[-no]", TOYFLAG_USR|TOYFLAG_BIN))
-USE_PIDOF(NEWTOY(pidof, "<1so:x", TOYFLAG_BIN))
+USE_PIDOF(NEWTOY(pidof, "so:x", TOYFLAG_BIN))
 USE_PING(NEWTOY(ping, "<1>1m#t#<0>255=64c#<0=3s#<0>4064=56i%W#<0=3w#<0qf46I:[-46]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PING(OLDTOY(ping6, ping, TOYFLAG_USR|TOYFLAG_BIN))
 USE_PIVOT_ROOT(NEWTOY(pivot_root, "<2>2", TOYFLAG_SBIN))
diff --git a/android/linux/generated/config.h b/android/linux/generated/config.h
index de38960..82814f9 100644
--- a/android/linux/generated/config.h
+++ b/android/linux/generated/config.h
@@ -258,8 +258,12 @@
 #define USE_HELP_EXTRAS(...)
 #define CFG_HELP 0
 #define USE_HELP(...)
+#define CFG_HEXDUMP 0
+#define USE_HEXDUMP(...)
 #define CFG_HEXEDIT 0
 #define USE_HEXEDIT(...)
+#define CFG_HD 0
+#define USE_HD(...)
 #define CFG_HOSTID 0
 #define USE_HOSTID(...)
 #define CFG_HOST 0
diff --git a/android/linux/generated/flags.h b/android/linux/generated/flags.h
index c315a28..78a35cb 100644
--- a/android/linux/generated/flags.h
+++ b/android/linux/generated/flags.h
@@ -1267,6 +1267,23 @@
 #undef FLAG_a
 #endif
 
+// hexdump   bcCdn#<0os#<0vx[!bcCdox]
+#undef OPTSTR_hexdump
+#define OPTSTR_hexdump "bcCdn#<0os#<0vx[!bcCdox]"
+#ifdef CLEANUP_hexdump
+#undef CLEANUP_hexdump
+#undef FOR_hexdump
+#undef FLAG_x
+#undef FLAG_v
+#undef FLAG_s
+#undef FLAG_o
+#undef FLAG_n
+#undef FLAG_d
+#undef FLAG_C
+#undef FLAG_c
+#undef FLAG_b
+#endif
+
 // hexedit   <1>1r
 #undef OPTSTR_hexedit
 #define OPTSTR_hexedit "<1>1r"
@@ -2256,9 +2273,9 @@
 #undef FLAG_c
 #endif
 
-// pidof   <1so:x
+// pidof   so:x
 #undef OPTSTR_pidof
-#define OPTSTR_pidof "<1so:x"
+#define OPTSTR_pidof "so:x"
 #ifdef CLEANUP_pidof
 #undef CLEANUP_pidof
 #undef FOR_pidof
@@ -4709,6 +4726,21 @@
 #define FLAG_a (FORCED_FLAG<<2)
 #endif
 
+#ifdef FOR_hexdump
+#ifndef TT
+#define TT this.hexdump
+#endif
+#define FLAG_x (FORCED_FLAG<<0)
+#define FLAG_v (FORCED_FLAG<<1)
+#define FLAG_s (FORCED_FLAG<<2)
+#define FLAG_o (FORCED_FLAG<<3)
+#define FLAG_n (FORCED_FLAG<<4)
+#define FLAG_d (FORCED_FLAG<<5)
+#define FLAG_C (FORCED_FLAG<<6)
+#define FLAG_c (FORCED_FLAG<<7)
+#define FLAG_b (FORCED_FLAG<<8)
+#endif
+
 #ifdef FOR_hexedit
 #ifndef TT
 #define TT this.hexedit
diff --git a/android/linux/generated/globals.h b/android/linux/generated/globals.h
index 1eede5a..cb86614 100644
--- a/android/linux/generated/globals.h
+++ b/android/linux/generated/globals.h
@@ -117,7 +117,7 @@
 // toys/lsb/pidof.c
 
 struct pidof_data {
-  char *omit;
+  char *o;
 };
 
 // toys/lsb/seq.c
@@ -722,6 +722,19 @@
   long gid;
 };
 
+// toys/pending/hexdump.c
+
+struct hexdump_data {
+    long s, n;
+
+    long long len, pos, ppos;
+    const char *fmt;
+    unsigned int fn, bc;  // file number and byte count
+    char linebuf[16];  // line buffer - serves double duty for sqeezing repeat
+                       // lines and for accumulating full lines accross file
+                       // boundaries if necessesary.
+};
+
 // toys/pending/host.c
 
 struct host_data {
@@ -1676,6 +1689,7 @@
 	struct getopt_data getopt;
 	struct getty_data getty;
 	struct groupadd_data groupadd;
+	struct hexdump_data hexdump;
 	struct host_data host;
 	struct ip_data ip;
 	struct ipcrm_data ipcrm;
diff --git a/android/linux/generated/help.h b/android/linux/generated/help.h
index 8a9f3aa..cd0919a 100644
--- a/android/linux/generated/help.h
+++ b/android/linux/generated/help.h
@@ -72,7 +72,7 @@
 
 #define HELP_seq "usage: seq [-w|-f fmt_str] [-s sep_str] [first] [increment] last\n\nCount from first to last, by increment. Omitted arguments default\nto 1. Two arguments are used as first and last. Arguments can be\nnegative or floating point.\n\n-f	Use fmt_str as a printf-style floating point format string\n-s	Use sep_str as separator, default is a newline character\n-w	Pad to equal width with leading zeroes"
 
-#define HELP_pidof "usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME]...\n\nPrint the PIDs of all processes with the given names.\n\n-s	Single shot, only return one pid\n-o	Omit PID(s)\n-x	Match shell scripts too"
+#define HELP_pidof "usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME...]\n\nPrint the PIDs of all processes with the given names.\n\n-o	Omit PID(s)\n-s	Single shot, only return one pid\n-x	Match shell scripts too"
 
 #define HELP_passwd_sad "Password changes are checked to make sure they're at least 6 chars long,\ndon't include the entire username (but not a subset of it), or the entire\nprevious password (but changing password1, password2, password3 is fine).\nThis heuristic accepts \"aaaaaa\" and \"123456\"."
 
@@ -432,6 +432,10 @@
 
 #define HELP_host "usage: host [-av] [-t TYPE] NAME [SERVER]\n\nPerform DNS lookup on NAME, which can be a domain name to lookup,\nor an IPv4 dotted or IPv6 colon-separated address to reverse lookup.\nSERVER (if present) is the DNS server to use.\n\n-a	-v -t ANY\n-t TYPE	query records of type TYPE\n-v	verbose"
 
+#define HELP_hd "usage: hd [FILE...]\n\nDisplay file(s) in cannonical hex+ASCII format."
+
+#define HELP_hexdump "usage: hexdump [-bcCdovx] [-n LEN] [-s SKIP] [FILE...]\n\nDump file(s) in hexadecimal format.\n\n-n LEN	Show LEN bytes of output\n-s SKIP	Skip bytes of input\n-v	Verbose (don't combine identical lines)\n\nDisplay type:\n-b One byte octal   -c One byte character -C Canonical (hex + ASCII)\n-d Two byte decimal -o Two byte octal     -x Two byte hexadecimal (default)"
+
 #define HELP_groupdel "usage: groupdel [USER] GROUP\n\nDelete a group or remove a user from a group"
 
 #define HELP_groupadd "usage: groupadd [-S] [-g GID] [USER] GROUP\n\nAdd a group or add a user to a group\n\n  -g GID Group id\n  -S     Create a system group"
diff --git a/android/linux/generated/newtoys.h b/android/linux/generated/newtoys.h
index ecbabab..81d4725 100644
--- a/android/linux/generated/newtoys.h
+++ b/android/linux/generated/newtoys.h
@@ -109,9 +109,11 @@
 USE_GUNZIP(NEWTOY(gunzip, "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_GZIP(NEWTOY(gzip,    "ncdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_REBOOT(OLDTOY(halt, reboot, TOYFLAG_SBIN|TOYFLAG_NEEDROOT))
+USE_HD(OLDTOY(hd, hexdump, TOYFLAG_USR|TOYFLAG_BIN))
 USE_HEAD(NEWTOY(head, "?n(lines)#<0=10c(bytes)#<0qv[-nc]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HELLO(NEWTOY(hello, 0, TOYFLAG_USR|TOYFLAG_BIN))
 USE_HELP(NEWTOY(help, "ahu", TOYFLAG_BIN|TOYFLAG_MAYFORK))
+USE_HEXDUMP(NEWTOY(hexdump, "bcCdn#<0os#<0vx[!bcCdox]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HEXEDIT(NEWTOY(hexedit, "<1>1r", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 USE_HOST(NEWTOY(host, "<1>2avt:", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HOSTID(NEWTOY(hostid, ">0", TOYFLAG_USR|TOYFLAG_BIN))
@@ -199,7 +201,7 @@
 USE_PASTE(NEWTOY(paste, "d:s", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 USE_PATCH(NEWTOY(patch, ">2(no-backup-if-mismatch)(dry-run)"USE_TOYBOX_DEBUG("x")"F#g#fulp#d:i:Rs(quiet)", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PGREP(NEWTOY(pgrep, "?cld:u*U*t*s*P*g*G*fnovxL:[-no]", TOYFLAG_USR|TOYFLAG_BIN))
-USE_PIDOF(NEWTOY(pidof, "<1so:x", TOYFLAG_BIN))
+USE_PIDOF(NEWTOY(pidof, "so:x", TOYFLAG_BIN))
 USE_PING(NEWTOY(ping, "<1>1m#t#<0>255=64c#<0=3s#<0>4064=56i%W#<0=3w#<0qf46I:[-46]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PING(OLDTOY(ping6, ping, TOYFLAG_USR|TOYFLAG_BIN))
 USE_PIVOT_ROOT(NEWTOY(pivot_root, "<2>2", TOYFLAG_SBIN))
diff --git a/android/mac/generated/config.h b/android/mac/generated/config.h
index 108ea0a..48f344f 100644
--- a/android/mac/generated/config.h
+++ b/android/mac/generated/config.h
@@ -258,8 +258,12 @@
 #define USE_HELP_EXTRAS(...)
 #define CFG_HELP 0
 #define USE_HELP(...)
+#define CFG_HEXDUMP 0
+#define USE_HEXDUMP(...)
 #define CFG_HEXEDIT 0
 #define USE_HEXEDIT(...)
+#define CFG_HD 0
+#define USE_HD(...)
 #define CFG_HOSTID 0
 #define USE_HOSTID(...)
 #define CFG_HOST 0
diff --git a/android/mac/generated/flags.h b/android/mac/generated/flags.h
index 568b3b4..dae3f5e 100644
--- a/android/mac/generated/flags.h
+++ b/android/mac/generated/flags.h
@@ -1267,6 +1267,23 @@
 #undef FLAG_a
 #endif
 
+// hexdump   bcCdn#<0os#<0vx[!bcCdox]
+#undef OPTSTR_hexdump
+#define OPTSTR_hexdump "bcCdn#<0os#<0vx[!bcCdox]"
+#ifdef CLEANUP_hexdump
+#undef CLEANUP_hexdump
+#undef FOR_hexdump
+#undef FLAG_x
+#undef FLAG_v
+#undef FLAG_s
+#undef FLAG_o
+#undef FLAG_n
+#undef FLAG_d
+#undef FLAG_C
+#undef FLAG_c
+#undef FLAG_b
+#endif
+
 // hexedit   <1>1r
 #undef OPTSTR_hexedit
 #define OPTSTR_hexedit "<1>1r"
@@ -2256,9 +2273,9 @@
 #undef FLAG_c
 #endif
 
-// pidof   <1so:x
+// pidof   so:x
 #undef OPTSTR_pidof
-#define OPTSTR_pidof "<1so:x"
+#define OPTSTR_pidof "so:x"
 #ifdef CLEANUP_pidof
 #undef CLEANUP_pidof
 #undef FOR_pidof
@@ -4709,6 +4726,21 @@
 #define FLAG_a (FORCED_FLAG<<2)
 #endif
 
+#ifdef FOR_hexdump
+#ifndef TT
+#define TT this.hexdump
+#endif
+#define FLAG_x (FORCED_FLAG<<0)
+#define FLAG_v (FORCED_FLAG<<1)
+#define FLAG_s (FORCED_FLAG<<2)
+#define FLAG_o (FORCED_FLAG<<3)
+#define FLAG_n (FORCED_FLAG<<4)
+#define FLAG_d (FORCED_FLAG<<5)
+#define FLAG_C (FORCED_FLAG<<6)
+#define FLAG_c (FORCED_FLAG<<7)
+#define FLAG_b (FORCED_FLAG<<8)
+#endif
+
 #ifdef FOR_hexedit
 #ifndef TT
 #define TT this.hexedit
diff --git a/android/mac/generated/globals.h b/android/mac/generated/globals.h
index 1eede5a..cb86614 100644
--- a/android/mac/generated/globals.h
+++ b/android/mac/generated/globals.h
@@ -117,7 +117,7 @@
 // toys/lsb/pidof.c
 
 struct pidof_data {
-  char *omit;
+  char *o;
 };
 
 // toys/lsb/seq.c
@@ -722,6 +722,19 @@
   long gid;
 };
 
+// toys/pending/hexdump.c
+
+struct hexdump_data {
+    long s, n;
+
+    long long len, pos, ppos;
+    const char *fmt;
+    unsigned int fn, bc;  // file number and byte count
+    char linebuf[16];  // line buffer - serves double duty for sqeezing repeat
+                       // lines and for accumulating full lines accross file
+                       // boundaries if necessesary.
+};
+
 // toys/pending/host.c
 
 struct host_data {
@@ -1676,6 +1689,7 @@
 	struct getopt_data getopt;
 	struct getty_data getty;
 	struct groupadd_data groupadd;
+	struct hexdump_data hexdump;
 	struct host_data host;
 	struct ip_data ip;
 	struct ipcrm_data ipcrm;
diff --git a/android/mac/generated/help.h b/android/mac/generated/help.h
index 8a9f3aa..cd0919a 100644
--- a/android/mac/generated/help.h
+++ b/android/mac/generated/help.h
@@ -72,7 +72,7 @@
 
 #define HELP_seq "usage: seq [-w|-f fmt_str] [-s sep_str] [first] [increment] last\n\nCount from first to last, by increment. Omitted arguments default\nto 1. Two arguments are used as first and last. Arguments can be\nnegative or floating point.\n\n-f	Use fmt_str as a printf-style floating point format string\n-s	Use sep_str as separator, default is a newline character\n-w	Pad to equal width with leading zeroes"
 
-#define HELP_pidof "usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME]...\n\nPrint the PIDs of all processes with the given names.\n\n-s	Single shot, only return one pid\n-o	Omit PID(s)\n-x	Match shell scripts too"
+#define HELP_pidof "usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME...]\n\nPrint the PIDs of all processes with the given names.\n\n-o	Omit PID(s)\n-s	Single shot, only return one pid\n-x	Match shell scripts too"
 
 #define HELP_passwd_sad "Password changes are checked to make sure they're at least 6 chars long,\ndon't include the entire username (but not a subset of it), or the entire\nprevious password (but changing password1, password2, password3 is fine).\nThis heuristic accepts \"aaaaaa\" and \"123456\"."
 
@@ -432,6 +432,10 @@
 
 #define HELP_host "usage: host [-av] [-t TYPE] NAME [SERVER]\n\nPerform DNS lookup on NAME, which can be a domain name to lookup,\nor an IPv4 dotted or IPv6 colon-separated address to reverse lookup.\nSERVER (if present) is the DNS server to use.\n\n-a	-v -t ANY\n-t TYPE	query records of type TYPE\n-v	verbose"
 
+#define HELP_hd "usage: hd [FILE...]\n\nDisplay file(s) in cannonical hex+ASCII format."
+
+#define HELP_hexdump "usage: hexdump [-bcCdovx] [-n LEN] [-s SKIP] [FILE...]\n\nDump file(s) in hexadecimal format.\n\n-n LEN	Show LEN bytes of output\n-s SKIP	Skip bytes of input\n-v	Verbose (don't combine identical lines)\n\nDisplay type:\n-b One byte octal   -c One byte character -C Canonical (hex + ASCII)\n-d Two byte decimal -o Two byte octal     -x Two byte hexadecimal (default)"
+
 #define HELP_groupdel "usage: groupdel [USER] GROUP\n\nDelete a group or remove a user from a group"
 
 #define HELP_groupadd "usage: groupadd [-S] [-g GID] [USER] GROUP\n\nAdd a group or add a user to a group\n\n  -g GID Group id\n  -S     Create a system group"
diff --git a/android/mac/generated/newtoys.h b/android/mac/generated/newtoys.h
index ecbabab..81d4725 100644
--- a/android/mac/generated/newtoys.h
+++ b/android/mac/generated/newtoys.h
@@ -109,9 +109,11 @@
 USE_GUNZIP(NEWTOY(gunzip, "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_GZIP(NEWTOY(gzip,    "ncdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_REBOOT(OLDTOY(halt, reboot, TOYFLAG_SBIN|TOYFLAG_NEEDROOT))
+USE_HD(OLDTOY(hd, hexdump, TOYFLAG_USR|TOYFLAG_BIN))
 USE_HEAD(NEWTOY(head, "?n(lines)#<0=10c(bytes)#<0qv[-nc]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HELLO(NEWTOY(hello, 0, TOYFLAG_USR|TOYFLAG_BIN))
 USE_HELP(NEWTOY(help, "ahu", TOYFLAG_BIN|TOYFLAG_MAYFORK))
+USE_HEXDUMP(NEWTOY(hexdump, "bcCdn#<0os#<0vx[!bcCdox]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HEXEDIT(NEWTOY(hexedit, "<1>1r", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 USE_HOST(NEWTOY(host, "<1>2avt:", TOYFLAG_USR|TOYFLAG_BIN))
 USE_HOSTID(NEWTOY(hostid, ">0", TOYFLAG_USR|TOYFLAG_BIN))
@@ -199,7 +201,7 @@
 USE_PASTE(NEWTOY(paste, "d:s", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 USE_PATCH(NEWTOY(patch, ">2(no-backup-if-mismatch)(dry-run)"USE_TOYBOX_DEBUG("x")"F#g#fulp#d:i:Rs(quiet)", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PGREP(NEWTOY(pgrep, "?cld:u*U*t*s*P*g*G*fnovxL:[-no]", TOYFLAG_USR|TOYFLAG_BIN))
-USE_PIDOF(NEWTOY(pidof, "<1so:x", TOYFLAG_BIN))
+USE_PIDOF(NEWTOY(pidof, "so:x", TOYFLAG_BIN))
 USE_PING(NEWTOY(ping, "<1>1m#t#<0>255=64c#<0=3s#<0>4064=56i%W#<0=3w#<0qf46I:[-46]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PING(OLDTOY(ping6, ping, TOYFLAG_USR|TOYFLAG_BIN))
 USE_PIVOT_ROOT(NEWTOY(pivot_root, "<2>2", TOYFLAG_SBIN))
diff --git a/configure b/configure
index 0b6501f..8e40814 100755
--- a/configure
+++ b/configure
@@ -21,8 +21,10 @@
 [ -z "$ASAN" ] || { CFLAGS="$CFLAGS -O1 -g -fno-omit-frame-pointer -fno-optimize-sibling-calls -fsanitize=address"; NOSTRIP=1; }
 
 # We accept LDFLAGS, but by default don't have anything in it
-if [ "$(uname)" != "Darwin" ]
+if [ "$(uname)" == "Darwin" ]
 then
+  [ -z "$LDOPTIMIZE" ] && LDOPTIMIZE="-Wl,-dead_strip"
+else
   [ -z "$LDOPTIMIZE" ] && LDOPTIMIZE="-Wl,--gc-sections"
   LDASNEEDED="-Wl,--as-needed"
 fi
diff --git a/lib/lib.c b/lib/lib.c
index 332a0d0..0c1b5c3 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -1164,9 +1164,10 @@
       if (scripts && !strcmp(bb, getbasename(cmd+strlen(cmd)+1))) goto match;
       continue;
 match:
-      if (callback(u, *cur)) break;
+      if (callback(u, *cur)) goto done;
     }
   }
+done:
   closedir(dp);
 }
 
diff --git a/lib/portability.h b/lib/portability.h
index 7d8334b..5ddfea5 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -197,7 +197,7 @@
 #include <sys/personality.h>
 #else
 #define PER_LINUX32 0
-#define personality(x)
+int personality(int);
 #endif
 
 #if defined(__APPLE__) || defined(__linux__)
diff --git a/tests/hexdump.test b/tests/hexdump.test
new file mode 100755
index 0000000..e319957
--- /dev/null
+++ b/tests/hexdump.test
@@ -0,0 +1,135 @@
+#!/bin/bash
+
+[ -f testing.sh ] && . testing.sh
+
+testcmd "simple file" "input" "0000000 6973 706d 656c 000a\n0000007\n" "simple\\n" ""
+testcmd "simple file -b" "-b input" "0000000 163 151 155 160 154 145 012\n0000007\n" "simple\\n" ""
+testcmd "simple file -c" "-c input" "0000000   s   i   m   p   l   e  \\\\n\n0000007\n" "simple\\n" ""
+testcmd "simple file -d" "-d input" "0000000 26995 28781 25964 00010\n0000007\n" "simple\\n" ""
+testcmd "simple file -o" "-o input" "0000000 064563 070155 062554 000012\n0000007\n" "simple\\n" ""
+testcmd "simple file -x" "-x input" "0000000 6973 706d 656c 000a\n0000007\n" "simple\\n" ""
+
+testcmd \
+  "simple file canonical output -C" \
+  "-C input" \
+  "\
+00000000  73 69 6d 70 6c 65 0a                              |simple.|\n\
+00000007\n" \
+  "simple\n" \
+  ""
+testcmd \
+  "simple file canonical output -C multiline" \
+  "-C input" \
+  "\
+00000000  73 69 6d 70 6c 65 0a 62  61 72 66 6f 6f 62 61 72  |simple.barfoobar|\n\
+00000010  66 6f 6f 62 61 72 0a                              |foobar.|\n\
+00000017\n" \
+  "\
+simple\n\
+barfoobarfoobar\n" \
+  ""
+
+testcmd \
+  "head of file -n 10" \
+  "-n 10 input" \
+  "\
+0000000 6973 706d 656c 730a 6d69\n\
+000000a\n" \
+  "simple\nsimple\n" \
+  ""
+testcmd \
+  "skip head of file -s 10" \
+  "-s 10 input" \
+  "\
+000000a 6c70 0a65\n\
+000000e\n" \
+  "simple\nsimple\n" \
+  ""
+
+testcmd \
+  "squeeze repeating lines" \
+  "input" \
+  "\
+0000000 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+*\n\
+0000070 6f66 006f\n\
+0000073\n" \
+  "\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+foo" \
+  ""
+testcmd \
+  "squeeze repeating lines" \
+  "input" \
+  "\
+0000000 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+*\n\
+0000030 6262 6262 6262 6262 6262 6262 6262 0a62\n\
+0000040 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+*\n\
+0000070 6262 6262 6262 6262 6262 6262 6262 0a62\n\
+0000080\n" \
+  "\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+bbbbbbbbbbbbbbb\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+bbbbbbbbbbbbbbb\n" \
+  ""
+testcmd \
+  "don't squeeze repeating lines" \
+  "-v input" \
+  "\
+0000000 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000010 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000020 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000030 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000040 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000050 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000060 6161 6161 6161 6161 6161 6161 6161 0a61\n\
+0000070 6f66 006f\n\
+0000073\n" \
+  "\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+aaaaaaaaaaaaaaa\n\
+foo" \
+  ""
+
+for _ in {1..25}; do echo "foobar" >> file1; done
+for _ in {1..25}; do echo "buzzbar" >> file2; done
+
+testcmd \
+  "accumulate offset accross files" \
+  "file1 file2" \
+  "0000000 6f66 626f 7261 660a 6f6f 6162 0a72 6f66\n\
+0000010 626f 7261 660a 6f6f 6162 0a72 6f66 626f\n\
+0000020 7261 660a 6f6f 6162 0a72 6f66 626f 7261\n\
+0000030 660a 6f6f 6162 0a72 6f66 626f 7261 660a\n\
+0000040 6f6f 6162 0a72 6f66 626f 7261 660a 6f6f\n\
+0000050 6162 0a72 6f66 626f 7261 660a 6f6f 6162\n\
+0000060 0a72 6f66 626f 7261 660a 6f6f 6162 0a72\n\
+0000070 6f66 626f 7261 660a 6f6f 6162 0a72 6f66\n\
+0000080 626f 7261 660a 6f6f 6162 0a72 6f66 626f\n\
+0000090 7261 660a 6f6f 6162 0a72 6f66 626f 7261\n\
+00000a0 660a 6f6f 6162 0a72 6f66 626f 7261 620a\n\
+00000b0 7a75 627a 7261 620a 7a75 627a 7261 620a\n\
+*\n\
+0000170 7a75 627a 7261 000a\n\
+0000177\n" \
+  "" \
+  ""
+rm file1 file2
diff --git a/toys/lsb/pidof.c b/toys/lsb/pidof.c
index cd705a7..791eed0 100644
--- a/toys/lsb/pidof.c
+++ b/toys/lsb/pidof.c
@@ -5,18 +5,18 @@
  *
  * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/pidof.html
 
-USE_PIDOF(NEWTOY(pidof, "<1so:x", TOYFLAG_BIN))
+USE_PIDOF(NEWTOY(pidof, "so:x", TOYFLAG_BIN))
 
 config PIDOF
   bool "pidof"
   default y
   help
-    usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME]...
+    usage: pidof [-s] [-o omitpid[,omitpid...]] [NAME...]
 
     Print the PIDs of all processes with the given names.
 
-    -s	Single shot, only return one pid
     -o	Omit PID(s)
+    -s	Single shot, only return one pid
     -x	Match shell scripts too
 */
 
@@ -24,17 +24,17 @@
 #include "toys.h"
 
 GLOBALS(
-  char *omit;
+  char *o;
 )
 
 static int print_pid(pid_t pid, char *name)
 {
   sprintf(toybuf, "%d", (int)pid);
-  if (comma_scan(TT.omit, toybuf, 0)) return 0;
+  if (comma_scan(TT.o, toybuf, 0)) return 0;
   xprintf(" %s"+!!toys.exitval, toybuf);
   toys.exitval = 0;
 
-  return toys.optflags & FLAG_s;
+  return FLAG(s);
 }
 
 void pidof_main(void)
diff --git a/toys/pending/hexdump.c b/toys/pending/hexdump.c
new file mode 100644
index 0000000..5e367a2
--- /dev/null
+++ b/toys/pending/hexdump.c
@@ -0,0 +1,155 @@
+/* hexdump.c - Dump file content in hexadecimal format to stdout
+ *
+ * Copyright 2021 Moritz Röhrich <moritz@ildefons.de>
+ *
+ * No standard
+ *
+ * TODO:
+ *  - Implement format strings (see man (1) hexdump)
+
+USE_HEXDUMP(NEWTOY(hexdump, "bcCdn#<0os#<0vx[!bcCdox]", TOYFLAG_USR|TOYFLAG_BIN))
+USE_HD(OLDTOY(hd, hexdump, TOYFLAG_USR|TOYFLAG_BIN))
+
+config HEXDUMP
+  bool "hexdump"
+  default n
+  help
+    usage: hexdump [-bcCdovx] [-n LEN] [-s SKIP] [FILE...]
+
+    Dump file(s) in hexadecimal format.
+
+    -n LEN	Show LEN bytes of output
+    -s SKIP	Skip bytes of input
+    -v	Verbose (don't combine identical lines)
+
+    Display type:
+    -b One byte octal   -c One byte character -C Canonical (hex + ASCII)
+    -d Two byte decimal -o Two byte octal     -x Two byte hexadecimal (default)
+
+config HD
+  bool "hd"
+  default HEXDUMP
+  help
+    usage: hd [FILE...]
+
+    Display file(s) in cannonical hex+ASCII format.
+*/
+
+#define FOR_hexdump
+#include "toys.h"
+
+GLOBALS(
+    long s, n;
+
+    long long len, pos, ppos;
+    const char *fmt;
+    unsigned int fn, bc;  // file number and byte count
+    char linebuf[16];  // line buffer - serves double duty for sqeezing repeat
+                       // lines and for accumulating full lines accross file
+                       // boundaries if necessesary.
+)
+
+const char *make_printable(unsigned char byte) {
+  switch (byte) {
+    case '\0': return "\\0";
+    case '\a': return "\\a";
+    case '\b': return "\\b";
+    case '\t': return "\\t";
+    case '\n': return "\\n";
+    case '\v': return "\\v";
+    case '\f': return "\\f";
+    default: return "??";  // for all unprintable bytes
+  }
+}
+
+void do_hexdump(int fd, char *name)
+{
+  unsigned short block, adv, i;
+  int sl, fs;  // skip line, file size
+
+  TT.fn++;  // keep track of how many files have been printed.
+  // skipp ahead, if necessary skip entire files:
+  if (FLAG(s) && (TT.s-TT.pos>0)) {
+    fs = xlseek(fd, 0L, SEEK_END);
+
+    if (fs < TT.s) {
+      TT.pos += fs;
+      TT.ppos += fs;
+    } else {
+      xlseek(fd, TT.s-TT.pos, SEEK_SET);
+      TT.ppos = TT.s;
+      TT.pos = TT.s;
+    }
+  }
+
+  for (sl = 0;
+       0 < (TT.len = readall(fd, toybuf,
+                             (TT.n && TT.s+TT.n-TT.pos<16-(TT.bc%16))
+                                ? TT.s+TT.n-TT.pos : 16-(TT.bc%16)));
+       TT.pos += TT.len) {
+    // This block compares the data read from file to the last line printed.
+    // If they don't match a new line is printed, else the line is skipped.
+    // If a * has already been printed to indicate a skipped line, printing the
+    // * is also skipped.
+    for (i = 0; i < 16 && i < TT.len; i++){
+      if (FLAG(v) || TT.len < 16 || toybuf[i] != TT.linebuf[i]) goto newline;
+    }
+    if (sl == 0) {
+      printf("*\n");
+      sl = 1;
+    }
+    TT.ppos += TT.len;
+    continue;
+
+newline:
+    strncpy(TT.linebuf+(TT.bc%16), toybuf, TT.len);
+    TT.bc = TT.bc % 16 + TT.len;
+    sl = 0;
+    if (TT.pos + TT.bc == TT.s+TT.n || TT.fn == toys.optc || TT.bc == 16) {
+      if (!FLAG(C) && !FLAG(c)) {
+        printf("%07llx", TT.ppos);
+        adv = FLAG(b) ? 1 : 2;
+        for (i = 0; i < TT.bc; i += adv) {
+          block = (FLAG(b) || i == TT.bc-1)
+            ? TT.linebuf[i] : (TT.linebuf[i] | TT.linebuf[i+1] << 8);
+          printf(TT.fmt, block);
+        }
+      } else if (FLAG(C)) {
+        printf("%08llx", TT.ppos);
+        for (i = 0; i < 16; i++) {
+          if (!(i % 8)) putchar(' ');
+          if (i < TT.bc) printf(" %02x", TT.linebuf[i]);
+          else printf("   ");
+        }
+        printf("  |");
+        for (i = 0; i < TT.bc; i++) {
+          if (TT.linebuf[i] < ' ' || TT.linebuf[i] > '~') putchar('.');
+          else putchar(TT.linebuf[i]);
+        }
+        putchar('|');
+      } else {
+        printf("%07llx", TT.ppos);
+        for (i = 0; i < TT.bc; i++) {
+          if (TT.linebuf[i] >= ' ' && TT.linebuf[i] <= '~')
+            printf("%4c", TT.linebuf[i]);
+          else printf("%4s", make_printable(TT.linebuf[i]));
+        }
+      }
+      putchar('\n');
+      TT.ppos += TT.bc;
+    }
+  }
+
+  if (TT.len < 0) perror_exit("read");
+}
+
+void hexdump_main(void)
+{
+  if FLAG(b) TT.fmt = " %03o";
+  else if FLAG(d) TT.fmt = " %05d";
+  else if FLAG(o) TT.fmt = " %06o";
+  else TT.fmt = " %04x";
+
+  loopfiles(toys.optargs, do_hexdump);
+  FLAG(C) ? printf("%08llx\n", TT.pos) : printf("%07llx\n", TT.pos);
+}