Add sethostname(2).
Not very useful, but helps building stuff like toybox out of the box.
Change-Id: I110e39030452bd093a84278e019c5752d293718d
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index 866671d..39ff37d 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -313,6 +313,8 @@
int setfsgid(gid_t) all
int setfsuid(uid_t) all
+int sethostname(const char*, size_t) all
+
pid_t wait4(pid_t, int*, int, struct rusage*) all
int __waitid:waitid(int, pid_t, struct siginfo_t*, int, void*) all
diff --git a/libc/arch-arm/syscalls/sethostname.S b/libc/arch-arm/syscalls/sethostname.S
new file mode 100644
index 0000000..0a98fd3
--- /dev/null
+++ b/libc/arch-arm/syscalls/sethostname.S
@@ -0,0 +1,14 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(sethostname)
+ mov ip, r7
+ ldr r7, =__NR_sethostname
+ swi #0
+ mov r7, ip
+ cmn r0, #(MAX_ERRNO + 1)
+ bxls lr
+ neg r0, r0
+ b __set_errno_internal
+END(sethostname)
diff --git a/libc/arch-arm64/syscalls/sethostname.S b/libc/arch-arm64/syscalls/sethostname.S
new file mode 100644
index 0000000..2dea457
--- /dev/null
+++ b/libc/arch-arm64/syscalls/sethostname.S
@@ -0,0 +1,14 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(sethostname)
+ mov x8, __NR_sethostname
+ svc #0
+
+ cmn x0, #(MAX_ERRNO + 1)
+ cneg x0, x0, hi
+ b.hi __set_errno_internal
+
+ ret
+END(sethostname)
diff --git a/libc/arch-mips/syscalls/sethostname.S b/libc/arch-mips/syscalls/sethostname.S
new file mode 100644
index 0000000..2987b52
--- /dev/null
+++ b/libc/arch-mips/syscalls/sethostname.S
@@ -0,0 +1,19 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(sethostname)
+ .set noreorder
+ .cpload t9
+ li v0, __NR_sethostname
+ syscall
+ bnez a3, 1f
+ move a0, v0
+ j ra
+ nop
+1:
+ la t9,__set_errno_internal
+ j t9
+ nop
+ .set reorder
+END(sethostname)
diff --git a/libc/arch-mips64/syscalls/sethostname.S b/libc/arch-mips64/syscalls/sethostname.S
new file mode 100644
index 0000000..2f132a2
--- /dev/null
+++ b/libc/arch-mips64/syscalls/sethostname.S
@@ -0,0 +1,25 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(sethostname)
+ .set push
+ .set noreorder
+ li v0, __NR_sethostname
+ syscall
+ bnez a3, 1f
+ move a0, v0
+ j ra
+ nop
+1:
+ move t0, ra
+ bal 2f
+ nop
+2:
+ .cpsetup ra, t1, 2b
+ LA t9,__set_errno_internal
+ .cpreturn
+ j t9
+ move ra, t0
+ .set pop
+END(sethostname)
diff --git a/libc/arch-x86/syscalls/sethostname.S b/libc/arch-x86/syscalls/sethostname.S
new file mode 100644
index 0000000..bfcfd73
--- /dev/null
+++ b/libc/arch-x86/syscalls/sethostname.S
@@ -0,0 +1,26 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(sethostname)
+ pushl %ebx
+ .cfi_def_cfa_offset 8
+ .cfi_rel_offset ebx, 0
+ pushl %ecx
+ .cfi_adjust_cfa_offset 4
+ .cfi_rel_offset ecx, 0
+ mov 12(%esp), %ebx
+ mov 16(%esp), %ecx
+ movl $__NR_sethostname, %eax
+ int $0x80
+ cmpl $-MAX_ERRNO, %eax
+ jb 1f
+ negl %eax
+ pushl %eax
+ call __set_errno_internal
+ addl $4, %esp
+1:
+ popl %ecx
+ popl %ebx
+ ret
+END(sethostname)
diff --git a/libc/arch-x86_64/syscalls/sethostname.S b/libc/arch-x86_64/syscalls/sethostname.S
new file mode 100644
index 0000000..4bcd12d
--- /dev/null
+++ b/libc/arch-x86_64/syscalls/sethostname.S
@@ -0,0 +1,15 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(sethostname)
+ movl $__NR_sethostname, %eax
+ syscall
+ cmpq $-MAX_ERRNO, %rax
+ jb 1f
+ negl %eax
+ movl %eax, %edi
+ call __set_errno_internal
+1:
+ ret
+END(sethostname)
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index deac92b..dca9b3d 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -183,7 +183,8 @@
extern unsigned int sleep(unsigned int);
extern int usleep(useconds_t);
-extern int gethostname(char *, size_t);
+int gethostname(char*, size_t);
+int sethostname(const char*, size_t);
extern void *__brk(void *);
extern int brk(void *);
diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 7232ae2..38c8efa 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -470,3 +470,11 @@
TEST_F(unistd_DeathTest, abort) {
ASSERT_EXIT(abort(), testing::KilledBySignal(SIGABRT), "");
}
+
+TEST(unistd, sethostname) {
+ // The permissions check happens before the argument check, so this will
+ // fail for a different reason if you're running as root than if you're
+ // not, but it'll fail either way. Checking that we have the symbol is about
+ // all we can do for sethostname(2).
+ ASSERT_EQ(-1, sethostname("", -1));
+}