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libposix: add access

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This commit is contained in:
Giacomo Tesio 2017-08-25 23:43:14 +02:00
parent 386cb370a6
commit b78613615d
6 changed files with 111 additions and 1 deletions
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40
qa/lib/c/access.c Normal file
View File

@ -0,0 +1,40 @@
/*
* 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 <lib9.h>
void
main(void)
{
char *err = nil;
if(access("/tmp", AEXIST) != 0)
err = "/tmp does not exists";
else if(access("/tmp", AREAD) != 0)
err = "/tmp is not readable";
else if(access("/tmp", AWRITE) != 0)
err = "/tmp is not writeable";
else if(access("/tmp", AEXEC) != 0)
err = "/tmp is not traversable";
if(err == nil){
print("PASS\n");
exits("PASS");
} else {
print("FAIL: %s\n", err);
exits("FAIL");
}
}

1
qa/lib/c/build.json
View File

@ -12,6 +12,7 @@
"cp *.rc $JEHANNE/arch/$ARCH/qa/lib/c/"
],
"SourceFilesCmd": [
"access.c",
"asmscall.c",
"cleanname.c",
"conswrite.c",

15
qa/lib/newlib/103-files.c
View File

@ -39,6 +39,21 @@ main(int argc, char **argv)
printf("FAIL: mkdir(qa-files) in /tmp returns %d\n", ret);
exit(5);
}
ret = access("/tmp/qa-files", F_OK);
if(ret != 0){
printf("FAIL: access(\"/tmp/qa-files\", F_OK) returned %d; errno %d\n", ret, errno);
exit(6);
}
ret = access("/tmp/qa-files", R_OK);
if(ret != 0){
printf("FAIL: access(\"/tmp/qa-files\", R_OK) returned %d; errno %d\n", ret, errno);
exit(7);
}
ret = access("/tmp/qa-files", X_OK);
if(ret != 0){
printf("FAIL: access(\"/tmp/qa-files\", X_OK) returned %d; errno %d\n", ret, errno);
exit(8);
}
return 0;
}

3
sys/include/posix.h
View File

@ -86,6 +86,7 @@ typedef unsigned long clock_t;
#define __POSIX_EXIT_SIGNAL_PREFIX "terminated by posix signal "
#define __POSIX_SIGNAL_PREFIX "posix: "
extern int POSIX_access(int *errnop, const char *path, int amode);
extern void POSIX_exit(int code) __attribute__((noreturn));
extern int POSIX_chmod(int *errnop, const char *path, int mode);
extern int POSIX_fchmodat(int *errnop, int fd, const char *path, long mode, int flag);
@ -282,6 +283,8 @@ extern int libposix_translate_open(PosixOpenTranslator translation);
extern int libposix_translate_seek_whence(int seek_set, int seek_cur, int seek_end);
extern int libposix_translate_access_mode(int f_ok, int r_ok, int w_ok, int x_ok);
/* Map the main exit status received by POSIX_exit to the exit status
* string for Jehanne.
*

10
sys/src/lib/c/9sys/access.c
View File

@ -1,7 +1,7 @@
/*
* This file is part of Jehanne.
*
* Copyright (C) 2016 Giacomo Tesio <giacomo@tesio.it>
* Copyright (C) 2016-2017 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
@ -23,6 +23,7 @@ int
jehanne_access(const char *name, int mode)
{
int fd;
Dir *db;
static char omode[] = {
OSTAT,
@ -40,5 +41,12 @@ jehanne_access(const char *name, int mode)
close(fd);
return 0;
}
db = jehanne_dirstat(name);
if(db != nil){
fd = db->mode & omode[mode&AMASK];
jehanne_free(db);
if(fd)
return 0;
}
return -1;
}

43
sys/src/lib/posix/files.c
View File

@ -24,6 +24,10 @@
static PosixStatReader __libposix_stat_reader;
static PosixOpenTranslator __libposix_open_translation;
static int __libposix_AT_FDCWD;
static int __libposix_F_OK;
static int __libposix_R_OK;
static int __libposix_W_OK;
static int __libposix_X_OK;
typedef enum SeekTypes
{
@ -87,6 +91,19 @@ libposix_translate_seek_whence(int seek_set, int seek_cur, int seek_end)
return 1;
}
int
libposix_translate_access_mode(int f_ok, int r_ok, int w_ok, int x_ok)
{
if(__libposix_initialized())
return 0;
__libposix_F_OK = f_ok;
__libposix_R_OK = r_ok;
__libposix_W_OK = w_ok;
__libposix_X_OK = x_ok;
return 1;
}
static SeekTypes
find_seek_type(int whence)
{
@ -99,6 +116,32 @@ find_seek_type(int whence)
return -1;
}
int
POSIX_access(int *errnop, const char *path, int amode)
{
PosixError e = 0;
if(path == nil || path[0] == '\0'){
e = PosixENOENT;
} else if(amode == __libposix_F_OK){
if(access(path, AEXIST) == 0)
return 0;
e = PosixENOENT;
} else if(amode & ~(__libposix_R_OK|__libposix_W_OK|__libposix_X_OK))
e = PosixEINVAL;
else if((amode & __libposix_R_OK) && access(path, AREAD) != 0)
e = PosixEACCES;
else if((amode & __libposix_W_OK) && access(path, AWRITE) != 0)
e = PosixEACCES;
else if((amode & __libposix_X_OK) && access(path, AEXEC) != 0)
e = PosixEACCES;
else
return 0;
*errnop = __libposix_get_errno(e);
return -1;
}
int
POSIX_pipe(int *errnop, int fildes[2])
{