Add service(8).
This commit is contained in:
Jonas 'Sortie' Termansen
parent
08a834d932
commit
189e79d62d
7 changed files with 1872 additions and 24 deletions
1
init/.gitignore
vendored
1
init/.gitignore
vendored
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@ -1,2 +1,3 @@
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init
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service
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*.o
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@ -8,26 +8,26 @@ CFLAGS?=$(OPTLEVEL)
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CFLAGS:=$(CFLAGS) -Wall -Wextra
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BINARY=init
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BINARIES=\
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init \
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service \
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OBJS=\
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init.o \
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MANPAGES8=\
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init.8 \
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service.8 \
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all: $(BINARY)
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all: $(BINARIES)
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.PHONY: all install clean
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$(BINARY): $(OBJS)
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$(CC) $(CFLAGS) $(OBJS) -o $(BINARY) -lmount $(LIBS)
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%.o: %.c
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$(CC) -std=gnu11 $(CFLAGS) $(CPPFLAGS) -c $< -o $@
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%: %.c
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$(CC) -std=gnu11 $(CFLAGS) $(CPPFLAGS) $< -o $@ -lmount $(LIBS)
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install: all
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mkdir -p $(DESTDIR)$(SBINDIR)
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install $(BINARY) $(DESTDIR)$(SBINDIR)
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install $(BINARIES) $(DESTDIR)$(SBINDIR)
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mkdir -p $(DESTDIR)$(MANDIR)/man8
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cp init.8 $(DESTDIR)$(MANDIR)/man8/init.8
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install $(MANPAGES8) $(DESTDIR)$(MANDIR)/man8
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clean:
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rm -f $(BINARY) $(OBJS) *.o
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rm -f $(BINARIES) $(OBJS) *.o
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@ -301,6 +301,7 @@ exits with the same exit status as its target session if it terminates normally.
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.Xr login 8 ,
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.Xr poweroff 8 ,
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.Xr reboot 8 ,
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.Xr service 8 ,
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.Xr sysmerge 8 ,
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.Xr update-initrd 8
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.Sh SECURITY CONSIDERATIONS
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882
init/init.c
882
init/init.c
File diff suppressed because it is too large
Load diff
391
init/service.8
Normal file
391
init/service.8
Normal file
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@ -0,0 +1,391 @@
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.Dd May 24, 2024
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.Dt SERVICE 8
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.Os
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.Sh NAME
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.Nm service
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.Nd daemon maintenance
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.Sh SYNOPSIS
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.Nm service
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.Op Fl lr
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.Op Fl \-s Ns "=" Ns source-daemon
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.Op Fl \-exit-code
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.Op Fl \-no-await
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.Op Fl \-no-optional
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.Op Fl \-raw
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.Op Fl \-source Ns "=" Ns source-daemon
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.Ar daemon
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.Oo
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.Sy dependents
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.Sy disable
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.Sy edges
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.Sy enable
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.Sy exit-code
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.Sy kill
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.Sy pid
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.Sy reconfigure
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.Sy reload
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.Sy requirements
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.Sy restart
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.Sy signal
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.Sy start
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.Sy state
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.Sy status
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.Sy stop
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.Sy terminate
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.Oc
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.Sh DESCRIPTION
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.Nm
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performs maintenance of daemons run by
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.Xr init 8
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as configured in
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.Xr init 5 .
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The daemons are serviced by connecting to the
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.Nm init
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process and writing the requested command to the
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.Pa /var/run/init
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filesytem socket.
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.Pp
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The options are as follows:
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.Bl -tag -width "12345678"
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.It Fl s , Fl \-source-daemon Ns "=" Ns Ar source-daemon
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When modifying a dependency using the
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.Sy enable , disable , start
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and
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.Sy stop
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commands, use the
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.Ar source-daemon
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as the source daemon in the dependency on the target
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.Ar daemon .
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The default the
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.Sy local
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daemon which is the parent of the locally configured daemons.
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.It Fl \-exit-code
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Set the
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.Sy exit-code
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flag on the dependency created in the
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.Sy enable
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and
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.Sy start
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commands.
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.It Fl \-no-await
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Set the
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.Sy no-await
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flag on the dependency created in the
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.Sy enable
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and
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.Sy start
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commands.
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.It Fl \-no-optional
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Unset the
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.Sy optional
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flag on the dependency created in the
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.Sy enable
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and
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.Sy start
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commands.
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The default is to set the
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.Sy optional
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flag, which is the opposite of the
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.Xr init 5
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.Sy require
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declaration where dependencies are mandatory by default.
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.It Fl l , \-list
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Write a table containing the status of every loaded daemon in the format of the
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.Sy status
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command.
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.It Fl r , \-raw
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Write the command and additional operands as a raw message without verification
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on the
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.Nm init
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socket
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and output the raw reply sent from
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.Nm init.
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.El
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.Pp
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The commands are as follows:
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.Bl -tag -width "requirements"
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.It Sy dependents
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Write the incoming dependencies on the
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.Ar daemon
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in the format of the
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.Sy edges
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command, which explains why a daemon is running.
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.It Sy disable
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Permanently disable the
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.Ar daemon
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by removing the dependency on it from the configuration of the
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.Ar source-daemon
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(the
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.Sy local
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daemon by default, see
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.Xr init 5 )
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and then stopping it using the
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.Sy stop
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command.
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The daemon will continue to run if any other daemon depends on it, which can
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be diagnosed using the
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.Sy dependents
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command.
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.It Sy edges
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Write the incoming dependencies on the
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.Ar daemon
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and its outgoing dependencies in the format of the
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.Sy require
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declaration in
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.Xr init 5
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with an extra
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.Ar source
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operand:
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.Pp
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.Sy require
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.Ar source
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.Ar target
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[exit-code]
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[no-await]
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[optional]
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.It Sy enable
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Permanently enable the
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.Ar daemon
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by adding it to the configuration of the
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.Ar source-daemon
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(the
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.Sy local
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daemon by default, see
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.Xr init 5 )
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with the dependency flags per
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.Fl \-exit-code ,
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.Fl \-no-await ,
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and
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.Fl \-no-optional
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and starting it by sending the
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.Sy start
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command.
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The daemon only starts if the
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.Ar source-daemon
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is running.
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.It Sy exit-code
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Write the exit code of the
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.Ar daemon ,
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or the empty string if it has not exited.
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.It Sy kill
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Kill the
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.Ar daemon
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by sending the
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.Sy SIGKILL
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signal as a last resort that may cause data loss.
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.It Sy pid
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Write the process id of the
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.Ar daemon
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if it is running, or the empty output if it
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does not have a process.
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Process ids can be recycled and are subject to inherent race conditions.
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Prefer to use the other commands in
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.Nm
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that addresses the daemon by its symbolic name as
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.Xr init 8
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will ensure the command operates on the correct process.
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.It Sy reconfigure
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Reread the
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.Xr init 5
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configuration for the
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.Ar daemon
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and apply it after restarting the daemon.
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.It Sy reload
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Request the
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.Ar daemon
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gracefully reload its own configuration sending
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the reload signal (usually
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.Sy SIGHUP )
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without restarting the daemon and without reloading the
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.Xr init 5
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configuration.
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.It Sy requirements
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Write the outgoing dependencies from the
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.Ar daemon
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in the format of the
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.Sy edges
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command, which explains what daemons the daemon needs.
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.It Sy restart
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Restart the
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.Ar daemon
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by terminating it and starting it up again afterwards.
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.It Sy signal Ar signal
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Send the
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.Ar signal
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in the symbolic signal name format (e.g.
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.Sy SIGUSR1 )
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to the
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.Ar daemon .
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.It Sy start
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Start the
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.Ar daemon
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by asking
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.Xr init 8
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to add a runtime dependency from the
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.Ar source-daemon
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(the
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.Sy local
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daemon by default, see
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.Xr init 5 )
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to the daemon with the dependency flags per
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.Fl \-exit-code ,
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.Fl \-no-await ,
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and
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.Fl \-no-optional
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and starting it by sending the
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.Sy start
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command.
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The daemon only starts if the
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.Ar source-daemon
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is running.
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.It Sy state
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Write which the state the
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.Ar daemon
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is in.
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.It Sy status
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Write the status of the
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.Ar daemon
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as a single table row in the format:
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.Pp
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.Ar name
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.Ar state
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.Li pid Ns "=" Ns Ar pid
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.Li exit Ns "=" Ns Ar exit-code
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.Pp
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The
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.Ar state
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is one of
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.Sy terminated ,
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.Sy scheduled ,
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.Sy waiting ,
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.Sy satisfied ,
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.Sy starting ,
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.Sy running ,
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.Sy terminating ,
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.Sy finishing ,
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.Sy finished ,
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or
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.Sy failed .
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The
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.Ar pid
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is the process id if any, or
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.Li 0
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otherwise.
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The
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.Ar exit-code
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is the exit code of the daemon if it has exited, or the name of a signal that
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killed it, or
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.Li n/a
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if the daemon has not exited.
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.It Sy stop
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Stop the
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.Ar daemon
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by asking
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.Xr init 8
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to remove the dependency from the
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.Ar source-daemon
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(the
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.Sy local
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daemon by default, see
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.Xr init 5 )
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on the daemon.
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The daemon will continue to run as long if other daemon depends on it, which can
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be diagnosed using the
|
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.Sy dependents
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command.
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.It Sy terminate
|
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Terminate the
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.Ar daemon
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gracefully by sending the
|
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.Sy SIGTERM
|
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signal and
|
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.Sy SIGKILL
|
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after a timeout.
|
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Prefer the
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.Sy stop
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command if possible as the
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.Sy terminate
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command bypasses the reference count and may cause data loss if other daemons
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malfunction when the daemon is unexpectedly terminated.
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.El
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.Sh ENVIRONMENT
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.Bl -tag -width "INIT_SOCKET"
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.It Ev INIT_SOCKET
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.Xr init 8 Ns 's
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filesystem socket for communication,
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.Pa /var/run/init
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by default.
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.El
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.Sh FILES
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.Bl -tag -width "/etc/init/local" -compact
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.It Pa /etc/init/
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Daemon configuration for the local system (first in search path) (see
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.Xr init 5 )
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.It Pa /etc/init/local
|
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Configuration for the
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.Sy local
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daemon (see
|
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.Xr init 5 )
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.El
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.Sh EXIT STATUS
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.Nm
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will exit 0 on success and non-zero otherwise.
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.Sh EXAMPLES
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Permanently enable the sshd daemon:
|
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.Bd -literal
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$ service sshd enable
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.Ed
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.Pp
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Permanently disable the ntpd daemon:
|
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.Bd -literal
|
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$ service ntpd disable
|
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.Ed
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.Pp
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Temporarily start the nginx daemon without changing
|
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.Pa /etc/init/local :
|
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.Bd -literal
|
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$ service nginx start
|
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.Ed
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.Pp
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Temporarily disable the sshd daemon without changing
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.Pa /etc/init/local :
|
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.Bd -literal
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$ service sshd stop
|
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.Ed
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.Pp
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Temporarily stop the ntpd daemon and diagnose why it kept running due to the
|
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.Sy time
|
||||
daemon depending on it:
|
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.Bd -literal
|
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$ service ntpd stop
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$ service ntpd state
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running
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$ service ntpd dependents
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require time ntpd exit-code
|
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$ service --source-daemon=time ntpd stop
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$ service ntpd state
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finished
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.Ed
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.Sh SEE ALSO
|
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.Xr kill 1 ,
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.Xr init 5 ,
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.Xr halt 8 ,
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.Xr init 8 ,
|
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.Xr poweroff 8 ,
|
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.Xr reboot 8
|
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594
init/service.c
Normal file
594
init/service.c
Normal file
|
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@ -0,0 +1,594 @@
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/*
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* Copyright (c) 2024 Jonas 'Sortie' Termansen.
|
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*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* service.c
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* Start and stop services.
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*/
|
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|
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#include <sys/socket.h>
|
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#include <sys/stat.h>
|
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#include <sys/un.h>
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|
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#include <ctype.h>
|
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#include <err.h>
|
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#include <errno.h>
|
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#include <getopt.h>
|
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#include <stdbool.h>
|
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#include <stddef.h>
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#include <stdlib.h>
|
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <wchar.h>
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|
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static bool array_add(void*** array_ptr,
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size_t* used_ptr,
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size_t* length_ptr,
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void* value)
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{
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void** array;
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memcpy(&array, array_ptr, sizeof(array)); // Strict aliasing.
|
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|
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if ( *used_ptr == *length_ptr )
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{
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size_t length = *length_ptr;
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if ( !length )
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length = 4;
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void** new_array = reallocarray(array, length, 2 * sizeof(void*));
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if ( !new_array )
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return false;
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array = new_array;
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memcpy(array_ptr, &array, sizeof(array)); // Strict aliasing.
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*length_ptr = length * 2;
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}
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|
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memcpy(array + (*used_ptr)++, &value, sizeof(value)); // Strict aliasing.
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|
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return true;
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}
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|
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static char** tokenize(size_t* out_tokens_used, const char* string)
|
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{
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size_t tokens_used = 0;
|
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size_t tokens_length = 0;
|
||||
char** tokens = malloc(sizeof(char*));
|
||||
if ( !tokens )
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return NULL;
|
||||
bool failed = false;
|
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bool invalid = false;
|
||||
while ( *string )
|
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{
|
||||
if ( isspace((unsigned char) *string) )
|
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{
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string++;
|
||||
continue;
|
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}
|
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if ( *string == '#' )
|
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break;
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char* token;
|
||||
size_t token_size;
|
||||
FILE* fp = open_memstream(&token, &token_size);
|
||||
if ( !fp )
|
||||
{
|
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failed = true;
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||||
break;
|
||||
}
|
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bool singly = false;
|
||||
bool doubly = false;
|
||||
bool escaped = false;
|
||||
while ( *string )
|
||||
{
|
||||
char c = *string++;
|
||||
if ( !escaped && !singly && !doubly && isspace((unsigned char) c) )
|
||||
break;
|
||||
if ( !escaped && !doubly && c == '\'' )
|
||||
{
|
||||
singly = !singly;
|
||||
continue;
|
||||
}
|
||||
if ( !escaped && !singly && c == '"' )
|
||||
{
|
||||
doubly = !doubly;
|
||||
continue;
|
||||
}
|
||||
if ( !singly && !escaped && c == '\\' )
|
||||
{
|
||||
escaped = true;
|
||||
continue;
|
||||
}
|
||||
if ( escaped )
|
||||
{
|
||||
switch ( c )
|
||||
{
|
||||
case 'a': c = '\a'; break;
|
||||
case 'b': c = '\b'; break;
|
||||
case 'e': c = '\e'; break;
|
||||
case 'f': c = '\f'; break;
|
||||
case 'n': c = '\n'; break;
|
||||
case 'r': c = '\r'; break;
|
||||
case 't': c = '\t'; break;
|
||||
case 'v': c = '\v'; break;
|
||||
default: break;
|
||||
};
|
||||
}
|
||||
escaped = false;
|
||||
if ( fputc((unsigned char) c, fp) == EOF )
|
||||
{
|
||||
failed = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if ( singly || doubly || escaped )
|
||||
{
|
||||
fclose(fp);
|
||||
free(token);
|
||||
invalid = true;
|
||||
break;
|
||||
}
|
||||
if ( fflush(fp) == EOF )
|
||||
{
|
||||
fclose(fp);
|
||||
free(token);
|
||||
failed = true;
|
||||
break;
|
||||
}
|
||||
fclose(fp);
|
||||
if ( !array_add((void***) &tokens, &tokens_used, &tokens_length,
|
||||
token) )
|
||||
{
|
||||
free(token);
|
||||
failed = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if ( failed || invalid )
|
||||
{
|
||||
for ( size_t i = 0; i < tokens_used; i++ )
|
||||
free(tokens[i]);
|
||||
free(tokens);
|
||||
if ( invalid )
|
||||
errno = 0;
|
||||
return NULL;
|
||||
}
|
||||
char** new_tokens = reallocarray(tokens, tokens_used, sizeof(char*));
|
||||
if ( new_tokens )
|
||||
tokens = new_tokens;
|
||||
*out_tokens_used = tokens_used;
|
||||
return tokens;
|
||||
}
|
||||
|
||||
static char** receive(FILE* fp, size_t* out_tokens_used)
|
||||
{
|
||||
char* line = NULL;
|
||||
size_t line_size;
|
||||
if ( getline(&line, &line_size, fp) < 0 )
|
||||
{
|
||||
if ( ferror(fp) )
|
||||
errx(1, "receiving reply: Unexpected end of connection");
|
||||
else
|
||||
err(1, "receiving reply");
|
||||
}
|
||||
char** result = tokenize(out_tokens_used, line);
|
||||
free(line);
|
||||
if ( !result )
|
||||
{
|
||||
if ( errno )
|
||||
errx(1, "invalid reply: %s", line);
|
||||
else
|
||||
errx(1, "failed to parse replyt");
|
||||
}
|
||||
if ( !*out_tokens_used )
|
||||
errx(1, "invalid empty reply");
|
||||
if ( !strcmp(result[0], "ok") )
|
||||
return result;
|
||||
else if ( !strcmp(result[0], "error") )
|
||||
errx(1, "error: %s", 2 <= *out_tokens_used ? result[1] : "Unknown");
|
||||
else
|
||||
errx(1, "unknown reply: %s", result[0]);
|
||||
}
|
||||
|
||||
static int open_local_client_socket(const char* path, int flags)
|
||||
{
|
||||
size_t path_length = strlen(path);
|
||||
size_t addr_size = offsetof(struct sockaddr_un, sun_path) + path_length + 1;
|
||||
struct sockaddr_un* sockaddr = malloc(addr_size);
|
||||
if ( !sockaddr )
|
||||
return -1;
|
||||
sockaddr->sun_family = AF_LOCAL;
|
||||
strcpy(sockaddr->sun_path, path);
|
||||
int fd = socket(AF_LOCAL, SOCK_STREAM | flags, 0);
|
||||
if ( fd < 0 )
|
||||
return free(sockaddr), -1;
|
||||
if ( connect(fd, (const struct sockaddr*) sockaddr, addr_size) < 0 )
|
||||
return close(fd), free(sockaddr), -1;
|
||||
free(sockaddr);
|
||||
return fd;
|
||||
}
|
||||
|
||||
static void rewrite(const char* path, const char* daemon, const char* flags)
|
||||
{
|
||||
FILE* fp = fopen(path, "r");
|
||||
if ( !fp && errno != ENOENT )
|
||||
err(1, "%s", path);
|
||||
char* out_path;
|
||||
if ( asprintf(&out_path, "%s.XXXXXX", path) < 0 )
|
||||
err(1, "malloc");
|
||||
int out_fd = mkstemp(out_path);
|
||||
if ( out_fd < 0 )
|
||||
err(1, "mkstemp: %s.XXXXXX", path);
|
||||
FILE* out = fdopen(out_fd, "w");
|
||||
if ( !out )
|
||||
{
|
||||
unlink(out_path);
|
||||
err(1, "fdopen");
|
||||
}
|
||||
bool found = false;
|
||||
char* line = NULL;
|
||||
size_t line_size = 0;
|
||||
ssize_t line_length;
|
||||
off_t line_number = 0;
|
||||
while ( fp && 0 < (line_length = getline(&line, &line_size, fp)) )
|
||||
{
|
||||
line_number++;
|
||||
size_t tokenc;
|
||||
char** tokens = tokenize(&tokenc, line);
|
||||
if ( !tokens )
|
||||
{
|
||||
unlink(out_path);
|
||||
if ( errno )
|
||||
err(1, "%s", path);
|
||||
else
|
||||
errx(1, "%s:%ji: Syntax error", path, (intmax_t) line_number);
|
||||
}
|
||||
if ( 2 <= tokenc &&
|
||||
!strcmp(tokens[0], "require") && !strcmp(tokens[1], daemon) )
|
||||
{
|
||||
found = true;
|
||||
if ( flags )
|
||||
fprintf(out, "require %s%s\n", daemon, flags);
|
||||
}
|
||||
else
|
||||
fputs(line, out);
|
||||
}
|
||||
free(line);
|
||||
if ( !found && flags )
|
||||
fprintf(out, "require %s%s\n", daemon, flags);
|
||||
if ( (fp && ferror(fp)) || ferror(out) || fflush(out) == EOF )
|
||||
{
|
||||
unlink(out_path);
|
||||
err(1, "%s", path);
|
||||
}
|
||||
if ( fp )
|
||||
{
|
||||
struct stat st;
|
||||
fstat(fileno(fp), &st);
|
||||
fchmod(out_fd, st.st_mode & 07777);
|
||||
fchown(out_fd, st.st_uid, st.st_gid);
|
||||
fclose(fp);
|
||||
}
|
||||
else
|
||||
fchmod(out_fd, 0666 & ~getumask());
|
||||
if ( rename(out_path, path) < 0 )
|
||||
{
|
||||
unlink(out_path);
|
||||
err(1, "rename: %s -> %s", out_path, path);
|
||||
}
|
||||
fclose(out);
|
||||
}
|
||||
|
||||
static bool check_daemon_exists_in_dir(const char* dir, const char* daemon)
|
||||
{
|
||||
char* path;
|
||||
if ( asprintf(&path, "%s/%s", dir, daemon) < 0 )
|
||||
err(1, "malloc");
|
||||
bool result = !access(path, F_OK);
|
||||
free(path);
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
static void check_daemon_exists(const char* daemon)
|
||||
{
|
||||
if ( !check_daemon_exists_in_dir("/etc/init", daemon) &&
|
||||
!check_daemon_exists_in_dir("/share/init", daemon) )
|
||||
errx(1, "%s: Daemon does not exist", daemon);
|
||||
}
|
||||
|
||||
static size_t string_display_length(const char* str)
|
||||
{
|
||||
size_t display_length = 0;
|
||||
mbstate_t ps;
|
||||
memset(&ps, 0, sizeof(ps));
|
||||
while ( true )
|
||||
{
|
||||
wchar_t wc;
|
||||
size_t amount = mbrtowc(&wc, str, SIZE_MAX, &ps);
|
||||
if ( amount == 0 )
|
||||
break;
|
||||
if ( amount == (size_t) -1 || amount == (size_t) -2 )
|
||||
{
|
||||
display_length++;
|
||||
str++;
|
||||
memset(&ps, 0, sizeof(ps));
|
||||
continue;
|
||||
}
|
||||
int width = wcwidth(wc);
|
||||
if ( width < 0 )
|
||||
width = 0;
|
||||
if ( SIZE_MAX - display_length < (size_t) width )
|
||||
display_length = SIZE_MAX;
|
||||
else
|
||||
display_length += (size_t) width;
|
||||
str += amount;
|
||||
}
|
||||
return display_length;
|
||||
}
|
||||
|
||||
static void pad(const char* string, size_t padding)
|
||||
{
|
||||
fputs(string, stdout);
|
||||
for ( size_t length = string_display_length(string);
|
||||
length < padding; padding-- )
|
||||
putchar(' ');
|
||||
}
|
||||
|
||||
static void format_statuses(char** tokens, size_t count)
|
||||
{
|
||||
size_t daemon_length = 0;
|
||||
size_t state_length = 10;
|
||||
for ( size_t i = 0; i < count; i++ )
|
||||
{
|
||||
if ( !strncmp(tokens[i], "daemon=", strlen("daemon=")) )
|
||||
{
|
||||
const char* arg = tokens[i] + strlen("daemon=");
|
||||
size_t length = string_display_length (arg);
|
||||
if ( daemon_length < length )
|
||||
daemon_length = length;
|
||||
}
|
||||
else if ( !strncmp(tokens[i], "state=", strlen("state=")) )
|
||||
{
|
||||
const char* arg = tokens[i] + strlen("state=");
|
||||
size_t length = string_display_length(arg);
|
||||
if ( state_length < length )
|
||||
state_length = length;
|
||||
}
|
||||
}
|
||||
size_t i = 0;
|
||||
while ( i < count )
|
||||
{
|
||||
size_t next = i;
|
||||
while ( next < count && strcmp(tokens[next], ",") )
|
||||
next++;
|
||||
const char* daemon = NULL;
|
||||
const char* state = NULL;
|
||||
for ( size_t n = i; n < next; n++ )
|
||||
{
|
||||
if ( !strncmp(tokens[n], "state=", strlen("state=")) )
|
||||
state = tokens[n] + strlen("state=");
|
||||
else if ( !strncmp(tokens[n], "daemon=", strlen("daemon=")) )
|
||||
daemon = tokens[n] + strlen("daemon=");
|
||||
}
|
||||
if ( !state || !daemon )
|
||||
errx(1, "missing information in reply");
|
||||
pad(daemon, daemon_length + 2);
|
||||
pad(state, state_length);
|
||||
for ( size_t n = i; n < next; n++ )
|
||||
{
|
||||
if ( strncmp(tokens[n], "state=", strlen("state=")) &&
|
||||
strncmp(tokens[n], "daemon=", strlen("daemon=")) )
|
||||
printf(" %s", tokens[n]);
|
||||
}
|
||||
putchar('\n');
|
||||
i = next;
|
||||
if ( i < count && !strcmp(tokens[i], ",") )
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
const char* init_socket = getenv("INIT_SOCKET");
|
||||
if ( !init_socket )
|
||||
init_socket = "/var/run/init";
|
||||
|
||||
bool exit_code = false;
|
||||
bool list = false;
|
||||
bool no_await = false;
|
||||
bool optional = true;
|
||||
bool raw = false;
|
||||
const char* source = "local";
|
||||
|
||||
const struct option longopts[] =
|
||||
{
|
||||
{"exit-code", no_argument, NULL, 256},
|
||||
{"list", no_argument, NULL, 'l'},
|
||||
{"no-await", no_argument, NULL, 257},
|
||||
{"no-optional", no_argument, NULL, 258},
|
||||
{"source", required_argument, NULL, 's'},
|
||||
{"raw", no_argument, NULL, 'r'},
|
||||
{0, 0, 0, 0}
|
||||
};
|
||||
const char* opts = "lrs:";
|
||||
int opt;
|
||||
while ( (opt = getopt_long(argc, argv, opts, longopts, NULL)) != -1 )
|
||||
{
|
||||
switch ( opt )
|
||||
{
|
||||
case 'l': list = true; break;
|
||||
case 'r': raw = true; break;
|
||||
case 's': source = optarg; break;
|
||||
case 256: exit_code = true; break;
|
||||
case 257: no_await = true; break;
|
||||
case 258: optional = false; break;
|
||||
default: return 2;
|
||||
}
|
||||
}
|
||||
|
||||
int fd = open_local_client_socket(init_socket, 0);
|
||||
if ( fd < 0 )
|
||||
err(1, "%s", init_socket);
|
||||
FILE* fp = fdopen(fd, "r+");
|
||||
if ( !fp )
|
||||
err(1, "fdopen");
|
||||
|
||||
if ( raw )
|
||||
{
|
||||
for ( int i = optind; i < argc; i++ )
|
||||
{
|
||||
if ( fprintf(fp, "%s%c", argv[i], i + 1 == argc ? '\n' : ' ') < 0 )
|
||||
err(1, "%s", init_socket);
|
||||
}
|
||||
size_t tokens_count;
|
||||
char** tokens = receive(fp, &tokens_count);
|
||||
for ( size_t i = 0; i < tokens_count; i++ )
|
||||
printf("%s%c", tokens[i], i + 1 == tokens_count ? '\n' : ' ');
|
||||
return 0;
|
||||
}
|
||||
|
||||
char flags[sizeof(" optional no-await exit-code")];
|
||||
snprintf(flags, sizeof(flags), "%s%s%s",
|
||||
optional ? " optional" : "",
|
||||
no_await ? " no-await" : "",
|
||||
exit_code ? " exit-code" : "");
|
||||
char* source_path;
|
||||
if ( asprintf(&source_path, "/etc/init/%s", source) < 0 )
|
||||
err(1, "malloc");
|
||||
|
||||
bool no_command = list;
|
||||
|
||||
if ( no_command && 0 < argc - optind )
|
||||
errx(1, "unexpected extra operand: %s", argv[optind]);
|
||||
else if ( !no_command && argc - optind < 2 )
|
||||
errx(1, "usage: <daemon> <command>");
|
||||
|
||||
const char* daemon = !no_command ? argv[optind++] : NULL;
|
||||
const char* command = !no_command ? argv[optind++] : NULL;
|
||||
|
||||
if ( command && strcmp(command, "signal") && 0 < argc - optind )
|
||||
errx(1, "unexpected extra operand: %s", argv[optind]);
|
||||
|
||||
if ( list )
|
||||
fprintf(fp, "list\n");
|
||||
else if ( !strcmp(command, "enable") )
|
||||
{
|
||||
check_daemon_exists(daemon);
|
||||
rewrite(source_path, daemon, flags);
|
||||
fprintf(fp, "require %s %s %s start\n", source, daemon, flags);
|
||||
}
|
||||
else if ( !strcmp(command, "disable") )
|
||||
{
|
||||
rewrite(source_path, daemon, NULL);
|
||||
fprintf(fp, "unrequire %s %s\n", source, daemon);
|
||||
}
|
||||
else if ( !strcmp(command, "start") )
|
||||
fprintf(fp, "require %s %s %s start\n", source, daemon, flags);
|
||||
else if ( !strcmp(command, "stop") )
|
||||
fprintf(fp, "unrequire %s %s\n", source, daemon);
|
||||
else if ( !strcmp(command, "restart") )
|
||||
fprintf(fp, "restart %s\n", daemon);
|
||||
else if ( !strcmp(command, "reload") )
|
||||
fprintf(fp, "reload %s\n", daemon);
|
||||
else if ( !strcmp(command, "reconfigure") )
|
||||
fprintf(fp, "reconfigure %s\n", daemon);
|
||||
else if ( !strcmp(command, "terminate") )
|
||||
fprintf(fp, "terminate %s\n", daemon);
|
||||
else if ( !strcmp(command, "kill") )
|
||||
fprintf(fp, "kill %s\n", daemon);
|
||||
else if ( !strcmp(command, "signal") )
|
||||
{
|
||||
if ( argc - optind < 1 )
|
||||
errx(1, "expected signal name");
|
||||
const char* signal = argv[optind++];
|
||||
if ( 0 < argc - optind )
|
||||
errx(1, "unexpected extra operand: %s", argv[optind]);
|
||||
fprintf(fp, "signal %s %s\n", daemon, signal);
|
||||
}
|
||||
else if ( !strcmp(command, "status") )
|
||||
fprintf(fp, "status %s\n", daemon);
|
||||
else if ( !strcmp(command, "state") )
|
||||
fprintf(fp, "status %s\n", daemon);
|
||||
else if ( !strcmp(command, "pid") )
|
||||
fprintf(fp, "status %s\n", daemon);
|
||||
else if ( !strcmp(command, "exit-code") )
|
||||
fprintf(fp, "status %s\n", daemon);
|
||||
else if ( !strcmp(command, "requirements") ||
|
||||
!strcmp(command, "dependents") ||
|
||||
!strcmp(command, "edges") )
|
||||
fprintf(fp, "%s %s\n", command, daemon);
|
||||
else
|
||||
errx(1, "unknown command: %s", command);
|
||||
|
||||
if ( ferror(fp) || fflush(fp) == EOF )
|
||||
err(1, "%s", init_socket);
|
||||
|
||||
size_t tokens_count;
|
||||
char** tokens = receive(fp, &tokens_count);
|
||||
|
||||
if ( list )
|
||||
format_statuses(tokens + 1, tokens_count - 1);
|
||||
else if ( !strcmp(command, "status") )
|
||||
format_statuses(tokens + 1, tokens_count - 1);
|
||||
else if ( !strcmp(command, "state") )
|
||||
{
|
||||
for ( size_t i = 1; i < tokens_count; i++ )
|
||||
{
|
||||
if ( !strncmp(tokens[i], "state=", strlen("state=")) )
|
||||
{
|
||||
puts(tokens[i] + strlen("state="));
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if ( !strcmp(command, "pid") )
|
||||
{
|
||||
for ( size_t i = 1; i < tokens_count; i++ )
|
||||
{
|
||||
if ( !strncmp(tokens[i], "pid=", strlen("pid=")) )
|
||||
{
|
||||
const char* arg = tokens[i] + strlen("pid=");
|
||||
if ( strcmp(arg, "0") )
|
||||
puts(arg);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if ( !strcmp(command, "exit-code") )
|
||||
{
|
||||
for ( size_t i = 1; i < tokens_count; i++ )
|
||||
{
|
||||
if ( !strncmp(tokens[i], "exit=", strlen("exit=")) )
|
||||
{
|
||||
const char* arg = tokens[i] + strlen("exit=");
|
||||
if ( strcmp(arg, "n/a") )
|
||||
puts(arg);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if ( !strcmp(command, "requirements") ||
|
||||
!strcmp(command, "dependents") ||
|
||||
!strcmp(command, "edges") )
|
||||
{
|
||||
for ( size_t i = 1; i < tokens_count; i++ )
|
||||
{
|
||||
if ( !strcmp(tokens[i], ",") )
|
||||
continue;
|
||||
size_t eol = i + 1 == tokens_count || !strcmp(tokens[i + 1], ",");
|
||||
printf("%s%c", tokens[i], eol ? '\n' : ' ');
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -653,7 +653,8 @@ require exampled exit-code
|
|||
.Ed
|
||||
.Sh SEE ALSO
|
||||
.Xr daemon 7 ,
|
||||
.Xr init 8
|
||||
.Xr init 8 ,
|
||||
.Xr service 8
|
||||
.Sh BUGS
|
||||
The control messages mentioned in
|
||||
.Sy log-control-messages
|
||||
|
|
|
|||
Loading…
Reference in a new issue