Services API

Services are system processes running in the background which wait for incoming requests. When a process wants to communicate with a service, it first needs to get a handle to the named service, and then it can communicate with the service via inter-process communication (each service has a name up to 8 characters).

Handles for services are retrieved from the service manager port, "sm:". Manager service "sm:m" also exists. Services are an abstraction of ports, they operate the same way except regular ports can have their handles retrieved directly from a SVC.

sm:

Cmd	Name
0	#Initialize
1	#GetService
2	#RegisterService
3	#UnregisterService

Initialize

Word	Value
0	0x00000004
1	0x8000000A
2	0x00000001
0-1	Pid
0	"SFCI"
1	0x00000000
2	Always 0.

GetService

Word	Value
0	0x00000004
1	0x0000000A
0	"SFCI"
1	0x00000001
2	Service name, zero padded and casted to u64.

RegisterService

Word	Value
0	0x00000004
1	0x0000000C
0	"SFCI"
1	0x00000002
2	Service name, zero padded and casted to u64.
3	Max sessions? 32-bit integer.
4	Unknown bool

UnregisterService

Word	Value
0	0x00000004
1	0x0000000A
0	"SFCI"
1	0x00000003
2	Service name, zero padded and casted to u64.

sm:m

This service is presumably equivalent to 3DS "srv:pm".

Service List

Service names	Description	Notes
acc:u0, acc:u1, acc:aa, acc:su	Account services	u1: User, su: Admin
ahid:cd, ahid:hdr, hid, hid:dbg, hid:sys, irs, irs:sys, xcd:sys	HID services
appletAE, appletOE, omm, spsm	Applet services, OMM services
aoc:u, mii:u, mii:e, ns:am, ns:su, ns:dev, pl:u, ovln:rcv, ovln:snd, pdm:ntfy, pdm:qry	NS Services	am: Application Manager, su: System Update
apm, apm:p, apm:sys, fgm, fgm:0, fgm:9	?
arp:r, arp:w, bgtc:t, bgtc:sc		r: Reader, w: Writer
audin:a, audin:d, audin:u, audout:a, audout:d, audout:u, audren:a, audren:d, audren:u, audrec:a, audrec:d, audrec:u, audctl, codecctl, hwopus	Audio services
bcat:a, bcat:u, bcat:m, bcat:s, news:a, news:c, news:m, news:p, news:v, prepo:u, prepo:s, prepo:m, prepo:a	News services
bpc, bpc:r, pcv, pcv:imm, time:u, time:a, time:s	BPC services
bsd:u, bsd:s, bsdcfg, ethc:c, ethc:i, nsd:u, nsd:a, sfdnsres	Sockets services, NSD services
btdrv	Bluetooth Driver services?
btm, btm:dbg, btm:sys	Battery services?
caps:a, caps:c	Capture services	a: Album, ss: Screenshot
caps:sc, caps:ss, mm:u, vi:m, vi:s, vi:u	Display services
csrng	Secure RNG services
dispdrv
erpt:c, erpt:r	Error Report services
es	ETicket services?
fan, psm, tc, ts
fatal:u, fatal:p	Fatal Error services	u: User, p: Privileged?
friend:u, friend:v, friend:m, friend:s, friend:a	Friend services
fsp-srv, fsp-ldr, fsp-pr	Filesystem services	srv: Main, ldr: Loader, pr: Program Registry
gpio, i2c, i2c:pcv, pinmux, pwm, uart	I2C services, UART services
lbl	Backlight services
ldn:m, ldn:s, ldn:u	Local Network Monitor services
ldr:pm, ldr:ro, ldr:shel, ldr:dmnt	Loader services
lm	Log services
lr, ncm	Content Manager services
nfc:am, nfc:mf:u, nfc:user, nfc:sys	NFC services
nifm:u, nifm:a, nifm:s	Network Interface services
nim, nim:shp, ntc	NIM services	shp: eShop
npns:u, npns:s	?
nvdrv:a, nvdrv:s, nvdrv:t, nvdrv, nvdrvdbg, nvgem:c, nvgem:cd, nvmemp	NV services
pcie	PCIe services
pctl, pctl:a, pctl:s, pctl:r	Parental Control services
pm:bm, pm:shell	Process Manager services
psc:c, psc:m	?
set, set:fd, set:cal, set:sys	Settings services	cal: Calendar?, sys: System Settings
ssl	SSL services
spl:	SPL services
usb:ds, usb:hs, usb:pd, usb:pd:c, usb:pm	USB services
wlan:inf, wlan:lcl, wlan:lg, wlan:lga, wlan:sg, wlan:soc	WLAN services