[hackers] [blind] Add multi-call binary installation || Mattias Andrée

[git]

commit d0c94265c042fe419926ee3e42fe4821c5e464cb
Author:     Mattias Andrée <maand...@kth.se>
AuthorDate: Sat Jul 15 21:56:07 2017 +0200
Commit:     Mattias Andrée <maand...@kth.se>
CommitDate: Sat Jul 15 21:56:07 2017 +0200

    Add multi-call binary installation
    
    Signed-off-by: Mattias Andrée <maand...@kth.se>

diff --git a/Makefile b/Makefile
index 4852381..34c0033 100644
--- a/Makefile
+++ b/Makefile
@@ -151,6 +151,7 @@ MAN7 = blind.7
 
 
 all: $(BIN)
+mcb: blind-mcb
 
 %: %.o $(COMMON_OBJ)
        $(CC) -o $@ $^ $(LDFLAGS)
@@ -158,6 +159,26 @@ all: $(BIN)
 %.o: src/%.c src/*.h src/*/*.h platform.h
        $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<
 
+%.mcb.o: src/%.c src/*.h src/*/*.h platform.h
+       $(CC) $(CFLAGS) $(CPPFLAGS) -Dmain="$$(printf 'main_%s\n' $* | tr -- - 
_)" -c -o $@ $<
+
+blind-mcb.c: Makefile
+       printf '#include <%s.h>\n' stdio string > blind-mcb.c
+       printf 'int main_%s(int argc, char *argv[]);\n' $(BIN) | tr -- - _ >> 
blind-mcb.c
+       printf 'int main(int argc, char *argv[]) {\n' >> blind-mcb.c
+       printf 'char *cmd = strrchr(*argv, '"'/'"');\n' >> blind-mcb.c
+       printf 'cmd = cmd ? cmd + 1 : *argv;\n' >> blind-mcb.c
+       for c in $(BIN); do \
+               printf 'if (!strcmp(cmd, "%s"))\n\treturn main_%s(argc, 
argv);\n' "$$c" "$$c" | \
+                       sed '/^\t/s/-/_/g'; \
+       done >> blind-mcb.c
+       printf 'fprintf(stderr, "Invalid command: %%s\\n", cmd);\n' >> 
blind-mcb.c
+       printf 'return 1;\n' >> blind-mcb.c
+       printf '}\n' >> blind-mcb.c
+
+blind-mcb: blind-mcb.o $(BIN:=.mcb.o) $(COMMON_OBJ)
+       $(CC) -o $@ $^ $(LDFLAGS)
+
 generate-macros: src/generate-macros.c
        $(CC) $(CFLAGS) $(CPPFLAGS) -o $@ $< $(LDFLAGS)
 
@@ -181,6 +202,26 @@ install: all
        done
        cd -- "$(DESTDIR)$(MANPREFIX)/man7" && chmod 644 $(MAN7)
 
+install-mcb: mcb
+       mkdir -p -- "$(DESTDIR)$(PREFIX)/bin"
+       for c in $(BIN); do \
+               $(LN) -f -- blind-single-colour "$(DESTDIR)$(PREFIX)/bin/$$c"; 
done
+       rm -f -- "$(DESTDIR)$(PREFIX)/bin/blind-single-colour"
+       cp -f -- blind-mcb "$(DESTDIR)$(PREFIX)/bin/blind-single-colour"
+       chmod 755 -- "$(DESTDIR)$(PREFIX)/bin/blind-single-colour"
+       mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man1"
+       set -e && for m in $(MAN1); do \
+               sed '1s/ blind$$/ " blind $(VERSION)"/g' \
+               < "man/$$m" > "$(DESTDIR)$(MANPREFIX)/man1/$$m"; \
+       done
+       cd -- "$(DESTDIR)$(MANPREFIX)/man1" && chmod 644 $(MAN1)
+       mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man7"
+       set -e && for m in $(MAN7); do \
+               sed '1s/ blind$$/ " blind $(VERSION)"/g' \
+               < "man/$$m" > "$(DESTDIR)$(MANPREFIX)/man7/$$m"; \
+       done
+       cd -- "$(DESTDIR)$(MANPREFIX)/man7" && chmod 644 $(MAN7)
+
 uninstall:
        cd -- "$(DESTDIR)$(PREFIX)/bin" && rm -f $(BIN)
        cd -- "$(DESTDIR)$(MANPREFIX)/man1" && rm -f $(MAN1)
@@ -203,8 +244,9 @@ dist:
 
 clean:
        -rm -f $(BIN) *.o blind-$(VERSION).tar.gz platform.h generate-macros
+       -rm -f blind-mcb.c blind-mcb.o blind-mcb
        -rm -rf "blind-$(VERSION)"
 
 
-.PHONY: all install uninstall dist clean
+.PHONY: all mcb install install-mcb uninstall dist clean
 .PRECIOUS: $(COMMON_OBJ) platform.h
diff --git a/config.mk b/config.mk
index 1bbef28..ae035ef 100644
--- a/config.mk
+++ b/config.mk
@@ -5,6 +5,9 @@ VERSION = 1.1
 PREFIX = /usr/local
 MANPREFIX = $(PREFIX)/share/man
 
+# Commands
+LN = ln -s
+
 # You may want to remove -DHAVE_PRCTL, -DHAVE_EPOLL, and
 # -DHAVE_SENDFILE from CPPFLAGS if you are not using Linux.
 CFLAGS   = -std=c11 -Wall -pedantic -O2