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Kernel: Add link() syscall to create hard links.

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This accidentally grew into a little bit of VFS cleanup as well.

Also add a simple /bin/ln implementation to exercise it.
This commit is contained in:
Andreas Kling 2019-02-21 13:26:40 +01:00
parent b6115ee5b7
commit 7d288aafb2
13 changed files with 138 additions and 93 deletions
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1
Userland/.gitignore vendored
View file

@ -31,3 +31,4 @@ dmesg
top
chmod
pape
ln

5
Userland/Makefile
View file

@ -27,6 +27,7 @@ OBJS = \
dmesg.o \
chmod.o \
top.o \
ln.o \
rm.o
APPS = \
@ -59,6 +60,7 @@ APPS = \
dmesg \
chmod \
top \
ln \
rm
ARCH_FLAGS =
@ -169,6 +171,9 @@ chmod: chmod.o
top: top.o
$(LD) -o $@ $(LDFLAGS) $< ../LibC/LibC.a
ln: ln.o
$(LD) -o $@ $(LDFLAGS) $< ../LibC/LibC.a
.cpp.o:
@echo "CXX $<"; $(CXX) $(CXXFLAGS) -o $@ -c $<

18
Userland/ln.cpp Normal file
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@ -0,0 +1,18 @@
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (argc != 3) {
fprintf(stderr, "usage: ln <old-path> <new-path>\n");
return 1;
}
int rc = link(argv[1], argv[2]);
if (rc < 0) {
perror("link");
return 1;
}
return 0;
}