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kernel: move sysdup to libc

This commit is contained in:
Giacomo Tesio 2017-01-05 03:02:56 +01:00
parent 882e33b091
commit 2508de40ea
10 changed files with 100 additions and 59 deletions
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6
arch/amd64/include/u.h
View File

@ -69,6 +69,12 @@ union FPdbleword
};
};
typedef union FdPair
{
int fd[2];
long aslong;
} FdPair;
typedef __builtin_va_list va_list;
#define va_start(v,l) __builtin_va_start(v,l)

1
sys/include/libc.h
View File

@ -396,6 +396,7 @@ extern void longjmp(jmp_buf, int);
extern char* mktemp(char*);
extern double modf(double, double*);
extern void notejmp(void*, jmp_buf, int);
extern int dup(int oldfd, int newfd);
extern int ocreate(const char* path, unsigned int omode, unsigned int perm);
extern void perror(const char*);
extern int pipe(int pipes[2]);

4
sys/src/kern/port/chan.c
View File

@ -1358,7 +1358,7 @@ namec(char *aname, int amode, long omode, long perm)
*/
if(amode == Acreate){
/* perm must have DMDIR if last element is / or /. */
if(e.mustbedir && !(perm&DMDIR)){
if(e.mustbedir && !(perm&DMDIR) && omode >= 0){
e.nerror = e.nelems;
error("create without DMDIR");
}
@ -1479,8 +1479,8 @@ namec(char *aname, int amode, long omode, long perm)
*/
e.nelems++;
e.nerror++;
if(omode >=0) /* a negative omode means this is a message for the server */
if(walk(&c, e.elems+e.nelems-1, 1, nomount, nil) == 0)
if(omode >=0) /* a negative omode means this is a message for the server */
error(Eexist);
mh = nil;

19
sys/src/kern/port/devdup.c
View File

@ -5,6 +5,9 @@
#include "fns.h"
#include "../port/error.h"
#define INT_MAX ((1<<31)-1)
extern int sysdup(int ofd, int nfd);
/* Qid is (2*fd + (file is ctl))+1 */
static int
@ -57,6 +60,20 @@ dupstat(Chan *c, uint8_t *db, long n)
return devstat(c, db, n, (Dirtab *)0, 0L, dupgen);
}
static Chan*
dupcreate(Chan* c, char* name, unsigned long omode, unsigned long perm)
{
FdPair in, out;
if((omode|OCEXEC) == ~0 && c->qid.path == 0){
in.aslong = perm;
out.aslong = 0;
out.fd[1] = sysdup(in.fd[0], in.fd[1]);
errorl(nil, ~out.aslong);
}
error(Eperm);
}
static Chan*
dupopen(Chan *c, unsigned long omode)
{
@ -134,7 +151,7 @@ Dev dupdevtab = {
dupwalk,
dupstat,
dupopen,
devcreate,
dupcreate,
dupclose,
dupread,
devbread,

19
sys/src/kern/port/devself.c
View File

@ -61,12 +61,6 @@ Cmdtab proccmd[] = {
CMsegfree, "free", 3,
};
typedef union PipeSet
{
long merged;
int fd[2];
} PipeSet;
static Dirtab selfdir[]={
".", {Qdir, 0, QTDIR}, 0, DMDIR|0777,
"brk", {Qbrk}, 0, 0,
@ -198,11 +192,14 @@ static Chan*
selfcreate(Chan* c, char* name, unsigned long omode, unsigned long perm)
{
long e;
if(strcmp(name, "brk") == 0){
switch(QID(c->qid)){
default:
error(Eperm);
case Qbrk:
e = (long)grow_bss(perm);
errorl("brk set", ~e);
errorl(nil, ~e);
}
error(Eperm);
}
static Walkqid*
@ -517,7 +514,7 @@ newfd2(int fd[2], Chan *c[2])
static long
newpipe(void)
{
PipeSet pipe;
FdPair pipe;
Chan *c[2];
static char *datastr[] = {"data", "data1"};
@ -543,7 +540,7 @@ newpipe(void)
error(Enofd);
poperror();
return pipe.merged;
return pipe.aslong;
}
static void

3
sys/src/kern/port/proc.c
View File

@ -1473,7 +1473,8 @@ errorl(char *err, long syscallerr)
if(up->nerrlab >= NERR)
panic("error stack too deep");
up->syscallerr = syscallerr;
kstrcpy(up->errstr, err, ERRMAX);
if(err != nil)
kstrcpy(up->errstr, err, ERRMAX);
setlabel(&up->errlab[NERR-1]);
nexterror();
}

35
sys/src/lib/c/9sys/dup.c Normal file
View File

@ -0,0 +1,35 @@
/*
* This file is part of Jehanne.
*
* Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
*
* Jehanne is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* Jehanne is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
*/
#include <u.h>
#include <libc.h>
int
dup(int oldfd, int newfd)
{
FdPair in, out;
long f;
in.fd[0] = oldfd;
in.fd[1] = newfd;
f = create("#d/new", -1, in.aslong);
if(f == -1)
return -1;
out.aslong = ~f;
return out.fd[1];
}

12
sys/src/lib/c/9sys/pipe.c
View File

@ -18,18 +18,12 @@
#include <u.h>
#include <libc.h>
typedef union PipeSet
{
long merged;
int fd[2];
} PipeSet;
int
pipe(int pipes[2])
{
PipeSet pset;
pset.merged = remove("#0/pipes");
if(pset.merged == -1)
FdPair pset;
pset.aslong = remove("#0/pipes");
if(pset.aslong == -1)
return -1;
pipes[0] = pset.fd[0];
pipes[1] = pset.fd[1];

1
sys/src/lib/c/build.json
View File

@ -50,6 +50,7 @@
"9sys/dirread.c",
"9sys/dirstat.c",
"9sys/dirwstat.c",
"9sys/dup.c",
"9sys/fork.c",
"9sys/getnetconninfo.c",
"9sys/getenv.c",

59
sys/src/sysconf.json
View File

@ -75,23 +75,12 @@
"long"
]
},
{
"Args": [
"int32_t",
"int32_t"
],
"Id": 5,
"Name": "dup",
"Ret": [
"int32_t"
]
},
{
"Args": [
"char*",
"int"
],
"Id": 6,
"Id": 5,
"Name": "errstr",
"Ret": [
"int"
@ -102,7 +91,7 @@
"const char*",
"const char**"
],
"Id": 7,
"Id": 6,
"Name": "exec",
"Ret": [
"uintptr_t"
@ -112,7 +101,7 @@
"Args": [
"const char*"
],
"Id": 8,
"Id": 7,
"Name": "_exits",
"Ret": [
"int"
@ -123,7 +112,7 @@
"int",
"const char*"
],
"Id": 9,
"Id": 8,
"Name": "fauth",
"Ret": [
"int"
@ -135,7 +124,7 @@
"const char*",
"uint32_t"
],
"Id": 10,
"Id": 9,
"Name": "fd2path",
"Ret": [
"int32_t"
@ -147,7 +136,7 @@
"uint8_t*",
"int"
],
"Id": 11,
"Id": 10,
"Name": "fstat",
"Ret": [
"long"
@ -160,7 +149,7 @@
"const char*",
"int"
],
"Id": 12,
"Id": 11,
"Name": "fversion",
"Ret": [
"int"
@ -172,7 +161,7 @@
"const uint8_t*",
"uint32_t"
],
"Id": 13,
"Id": 12,
"Name": "fwstat",
"Ret": [
"long"
@ -187,7 +176,7 @@
"const char*",
"int"
],
"Id": 14,
"Id": 13,
"Name": "mount",
"Ret": [
"int"
@ -197,7 +186,7 @@
"Args": [
"int"
],
"Id": 15,
"Id": 14,
"Name": "noted",
"Ret": [
"int"
@ -207,14 +196,14 @@
"Args": [
"const void*"
],
"Id": 16,
"Id": 15,
"Name": "notify",
"Ret": [
"int"
]
},
{
"Id": 17,
"Id": 16,
"Name": "nsec",
"Ret": [
"long"
@ -225,7 +214,7 @@
"const char*",
"uint32_t"
],
"Id": 18,
"Id": 17,
"Name": "open",
"Ret": [
"long"
@ -238,7 +227,7 @@
"long",
"long"
],
"Id": 19,
"Id": 18,
"Name": "pread",
"Ret": [
"long"
@ -251,7 +240,7 @@
"long",
"long"
],
"Id": 20,
"Id": 19,
"Name": "pwrite",
"Ret": [
"long"
@ -261,7 +250,7 @@
"Args": [
"const char*"
],
"Id": 21,
"Id": 20,
"Name": "remove",
"Ret": [
"long"
@ -272,7 +261,7 @@
"const void*",
"void*"
],
"Id": 22,
"Id": 21,
"Name": "rendezvous",
"Ret": [
"void*"
@ -282,7 +271,7 @@
"Args": [
"uint32_t"
],
"Id": 23,
"Id": 22,
"Name": "rfork",
"Ret": [
"int"
@ -294,7 +283,7 @@
"long",
"int"
],
"Id": 24,
"Id": 23,
"Name": "seek",
"Ret": [
"long"
@ -305,7 +294,7 @@
"int*",
"int"
],
"Id": 25,
"Id": 24,
"Name": "semacquire",
"Ret": [
"int"
@ -316,7 +305,7 @@
"int*",
"int"
],
"Id": 26,
"Id": 25,
"Name": "semrelease",
"Ret": [
"int"
@ -327,7 +316,7 @@
"int*",
"uint64_t"
],
"Id": 27,
"Id": 26,
"Name": "tsemacquire",
"Ret": [
"int"
@ -338,7 +327,7 @@
"const char*",
"const char*"
],
"Id": 28,
"Id": 27,
"Name": "unmount",
"Ret": [
"int"
@ -348,7 +337,7 @@
"Args": [
"unsigned long"
],
"Id": 29,
"Id": 28,
"Name": "alarm",
"Ret": [
"long"