usr: ls -l, df, mv, tail, tee, sleep, help, poweroff

Filling in the core utilities the box was missing:

- ls -l: type, links and size, now that stat() exists. The screen is 40
  columns, so it is "d  1   256 name", not the GNU sprawl. Sizes were
  previously unknowable except one file at a time with wc -c.
- df: blocks and inodes, used and free, on the 32 KiB cart disk.
- mv: no rename syscall, so it is cp + rm - and the copy has to finish before
  the source goes, or a failure loses the file.
- tail [-n N]: no seek syscall, so it streams the input through a ring of N
  lines rather than jumping to the end. N is capped by that ring.
- tee: the missing half of a pipeline - `cat big | tee copy | wc -l`.
- sleep: the thing every script needs; the kernel counts 1/64 s ticks.
- help: lists every command the shell knows, walked out of the kernel's own
  name table. The box previously had no way to tell you what it could do.
- poweroff: the only safe way to stop a gbos that has data on it. The cart's
  battery RAM is written when the emulator exits cleanly, so killing it loses
  the whole filesystem - it comes back "formatted". Found while testing /rc.

1 files changed, 49 insertions, 0 deletions

diff --git a/src/programs.asm b/src/programs.asm
index 0277dcc..11da2b1 100644
--- a/src/programs.asm
+++ b/src/programs.asm
@@ -157,6 +157,27 @@ ProgHttpd:
 SECTION "prog_ircd",   ROMX[$4000], BANK[40]
 ProgIrcd:
     INCBIN "build/usr/ircd.bin"
+SECTION "prog_df",     ROMX[$4000], BANK[41]
+ProgDf:
+    INCBIN "build/usr/df.bin"
+SECTION "prog_mv",     ROMX[$4000], BANK[42]
+ProgMv:
+    INCBIN "build/usr/mv.bin"
+SECTION "prog_sleep",  ROMX[$4000], BANK[43]
+ProgSleep:
+    INCBIN "build/usr/sleep.bin"
+SECTION "prog_tee",    ROMX[$4000], BANK[44]
+ProgTee:
+    INCBIN "build/usr/tee.bin"
+SECTION "prog_tail",   ROMX[$4000], BANK[45]
+ProgTail:
+    INCBIN "build/usr/tail.bin"
+SECTION "prog_help",   ROMX[$4000], BANK[46]
+ProgHelp:
+    INCBIN "build/usr/help.bin"
+SECTION "prog_poweroff", ROMX[$4000], BANK[47]
+ProgPoweroff:
+    INCBIN "build/usr/poweroff.bin"
 
 ; -----------------------------------------------------------------------------
 ; PROG_SH (bank 3) - the shell, now written in C (usr/sh.c): parses >/</| and
@@ -277,6 +298,20 @@ ProgramTable::
     dw ProgHttpd
     db LOW(BANK(ProgIrcd)), HIGH(BANK(ProgIrcd))
     dw ProgIrcd
+    db LOW(BANK(ProgDf)), HIGH(BANK(ProgDf))
+    dw ProgDf
+    db LOW(BANK(ProgMv)), HIGH(BANK(ProgMv))
+    dw ProgMv
+    db LOW(BANK(ProgSleep)), HIGH(BANK(ProgSleep))
+    dw ProgSleep
+    db LOW(BANK(ProgTee)), HIGH(BANK(ProgTee))
+    dw ProgTee
+    db LOW(BANK(ProgTail)), HIGH(BANK(ProgTail))
+    dw ProgTail
+    db LOW(BANK(ProgHelp)), HIGH(BANK(ProgHelp))
+    dw ProgHelp
+    db LOW(BANK(ProgPoweroff)), HIGH(BANK(ProgPoweroff))
+    dw ProgPoweroff
 ProgramTableEnd::
 
 ; -----------------------------------------------------------------------------
@@ -362,4 +397,18 @@ NameTable::
     db PROG_HTTPD
     db "ircd", 0
     db PROG_IRCD
+    db "df", 0
+    db PROG_DF
+    db "mv", 0
+    db PROG_MV
+    db "sleep", 0
+    db PROG_SLEEP
+    db "tee", 0
+    db PROG_TEE
+    db "tail", 0
+    db PROG_TAIL
+    db "help", 0
+    db PROG_HELP
+    db "poweroff", 0
+    db PROG_POWEROFF
     db 0