WebSVN – HelenOS – Diff – /trunk/uspace/lib/libc/generic/vfs/vfs.c


/*
 * Copyright (c) 2008 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <vfs/vfs.h>
#include <vfs/canonify.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <sys/types.h>
#include <ipc/ipc.h>
#include <ipc/services.h>
#include <async.h>
#include <atomic.h>
#include <futex.h>
#include <errno.h>
#include <string.h>
#include <ipc/devmap.h>
#include "../../../srv/vfs/vfs.h"
 
int vfs_phone = -1;
futex_t vfs_phone_futex = FUTEX_INITIALIZER;
 
futex_t cwd_futex = FUTEX_INITIALIZER;
DIR *cwd_dir = NULL;
char *cwd_path = NULL;
size_t cwd_size = 0;
 
char *absolutize(const char *path, size_t *retlen)
{
    char *ncwd_path;
    char *ncwd_path_nc;
 
    futex_down(&cwd_futex);
    size_t size = str_size(path);
    if (*path != '/') {
        if (!cwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
        ncwd_path_nc[cwd_size] = '/';
        ncwd_path_nc[cwd_size + 1] = '\0';
    } else {
        ncwd_path_nc = malloc(size + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc[0] = '\0';
    }
    str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
    ncwd_path = canonify(ncwd_path_nc, retlen);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        free(ncwd_path_nc);
        return NULL;
    }
    /*
     * We need to clone ncwd_path because canonify() works in-place and thus
     * the address in ncwd_path need not be the same as ncwd_path_nc, even
     * though they both point into the same dynamically allocated buffer.
     */
    ncwd_path = str_dup(ncwd_path);
    free(ncwd_path_nc);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        return NULL;
    }
    futex_up(&cwd_futex);
    return ncwd_path;
}
 
static void vfs_connect(void)
{
    while (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
}
 
static int device_get_handle(const char *name, dev_handle_t *handle,
    const unsigned int flags)
{
    int phone;
   
    if (flags & IPC_FLAG_BLOCKING)
        phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
    else
        phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
   
    if (phone < 0)
        return phone;
   
    ipc_call_t answer;
    aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,
        &answer);
   
    ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);
   
    if (retval != EOK) {
        async_wait_for(req, NULL);
        ipc_hangup(phone);
        return retval;
    }
   
    async_wait_for(req, &retval);
   
    if (handle != NULL)
        *handle = -1;
   
    if (retval == EOK) {
        if (handle != NULL)
            *handle = (dev_handle_t) IPC_GET_ARG1(answer);
    }
   
    ipc_hangup(phone);
    return retval;
}
 
int mount(const char *fs_name, const char *mp, const char *dev,
    const char *opts, const unsigned int flags)
{
    int res;
    ipcarg_t rc;
    aid_t req;
    dev_handle_t dev_handle;
   
    res = device_get_handle(dev, &dev_handle, flags);
    if (res != EOK)
        return res;
   
    size_t mpa_size;
    char *mpa = absolutize(mp, &mpa_size);
    if (!mpa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
    rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
   
    rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
 
    rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
 
    /* Ask VFS whether it likes fs_name. */
    rc = async_req_0_0(vfs_phone, IPC_M_PING);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
   
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(mpa);
   
    return (int) rc;
}
 
static int _open(const char *path, int lflag, int oflag, ...)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
 
    if (rc != EOK)
        return (int) rc;
    return (int) IPC_GET_ARG1(answer);
}
 
int open(const char *path, int oflag, ...)
{
    return _open(path, L_FILE, oflag);
}
 
int close(int fildes)
{
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    return (int)rc;
}
 
ssize_t read(int fildes, void *buf, size_t nbyte)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
    rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (ssize_t) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    if (rc == EOK)
        return (ssize_t) IPC_GET_ARG1(answer);
    else
        return rc;
}
 
ssize_t write(int fildes, const void *buf, size_t nbyte)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
    rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (ssize_t) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    if (rc == EOK)
        return (ssize_t) IPC_GET_ARG1(answer);
    else
        return -1;
}
 
off_t lseek(int fildes, off_t offset, int whence)
{
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t newoffs;
    rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
        &newoffs);
 
    async_serialize_end();
    futex_up(&vfs_phone_futex);
 
    if (rc != EOK)
        return (off_t) -1;
   
    return (off_t) newoffs;
}
 
int ftruncate(int fildes, off_t length)
{
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) rc;
}
 
DIR *opendir(const char *dirname)
{
    DIR *dirp = malloc(sizeof(DIR));
    if (!dirp)
        return NULL;
    dirp->fd = _open(dirname, L_DIRECTORY, 0);
    if (dirp->fd < 0) {
        free(dirp);
        return NULL;
    }
    return dirp;
}
 
struct dirent *readdir(DIR *dirp)
{
    ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
    if (len <= 0)
        return NULL;
    return &dirp->res;
}
 
void rewinddir(DIR *dirp)
{
    (void) lseek(dirp->fd, 0, SEEK_SET);
}
 
int closedir(DIR *dirp)
{
    (void) close(dirp->fd);
    free(dirp);
    return 0;
}
 
int mkdir(const char *path, mode_t mode)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return rc;
}
 
static int _unlink(const char *path, int lflag)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return rc;
}
 
int unlink(const char *path)
{
    return _unlink(path, L_NONE);
}
 
int rmdir(const char *path)
{
    return _unlink(path, L_DIRECTORY);
}
 
int rename(const char *old, const char *new)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t olda_size;
    char *olda = absolutize(old, &olda_size);
    if (!olda)
        return ENOMEM;
 
    size_t newa_size;
    char *newa = absolutize(new, &newa_size);
    if (!newa) {
        free(olda);
        return ENOMEM;
    }
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_0(vfs_phone, VFS_RENAME, NULL);
    rc = ipc_data_write_start(vfs_phone, olda, olda_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(olda);
        free(newa);
        return (int) rc;
    }
    rc = ipc_data_write_start(vfs_phone, newa, newa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(olda);
        free(newa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(olda);
    free(newa);
    return rc;
}
 
int chdir(const char *path)
{
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
 
    DIR *d = opendir(pa);
    if (!d) {
        free(pa);
        return ENOENT;
    }
 
    futex_down(&cwd_futex);
    if (cwd_dir) {
        closedir(cwd_dir);
        cwd_dir = NULL;
        free(cwd_path);
        cwd_path = NULL;
        cwd_size = 0;
    }
    cwd_dir = d;
    cwd_path = pa;
    cwd_size = pa_size;
    futex_up(&cwd_futex);
    return EOK;
}
 
char *getcwd(char *buf, size_t size)
{
    if (!size)
        return NULL;
    futex_down(&cwd_futex);
    if (size < cwd_size + 1) {
        futex_up(&cwd_futex);
        return NULL;
    }
    str_cpy(buf, size, cwd_path);
    futex_up(&cwd_futex);
    return buf;
}
 
/** @}
 */
 

Rev 4302	Rev 4305
1	/*	1	/*
2	* Copyright (c) 2008 Jakub Jermar	2	* Copyright (c) 2008 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <vfs/vfs.h>	35	#include <vfs/vfs.h>
36	#include <vfs/canonify.h>	36	#include <vfs/canonify.h>
37	#include <stdlib.h>	37	#include <stdlib.h>
38	#include <unistd.h>	38	#include <unistd.h>
39	#include <dirent.h>	39	#include <dirent.h>
40	#include <fcntl.h>	40	#include <fcntl.h>
41	#include <sys/stat.h>	41	#include <sys/stat.h>
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <sys/types.h>	43	#include <sys/types.h>
44	#include <ipc/ipc.h>	44	#include <ipc/ipc.h>
45	#include <ipc/services.h>	45	#include <ipc/services.h>
46	#include <async.h>	46	#include <async.h>
47	#include <atomic.h>	47	#include <atomic.h>
48	#include <futex.h>	48	#include <futex.h>
49	#include <errno.h>	49	#include <errno.h>
50	#include <string.h>	50	#include <string.h>
51	#include <ipc/devmap.h>	51	#include <ipc/devmap.h>
52	#include "../../../srv/vfs/vfs.h"	52	#include "../../../srv/vfs/vfs.h"
53		53
54	int vfs_phone = -1;	54	int vfs_phone = -1;
55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;	55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;
56		56
57	futex_t cwd_futex = FUTEX_INITIALIZER;	57	futex_t cwd_futex = FUTEX_INITIALIZER;
58	DIR *cwd_dir = NULL;	58	DIR *cwd_dir = NULL;
59	char *cwd_path = NULL;	59	char *cwd_path = NULL;
60	size_t cwd_size = 0;	60	size_t cwd_size = 0;
61		61
62	char absolutize(const char path, size_t *retlen)	62	char absolutize(const char path, size_t *retlen)
63	{	63	{
64	char *ncwd_path;	64	char *ncwd_path;
65	char *ncwd_path_nc;	65	char *ncwd_path_nc;
66		66
67	futex_down(&cwd_futex);	67	futex_down(&cwd_futex);
68	size_t size = str_size(path);	68	size_t size = str_size(path);
69	if (*path != '/') {	69	if (*path != '/') {
70	if (!cwd_path) {	70	if (!cwd_path) {
71	futex_up(&cwd_futex);	71	futex_up(&cwd_futex);
72	return NULL;	72	return NULL;
73	}	73	}
74	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);	74	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
75	if (!ncwd_path_nc) {	75	if (!ncwd_path_nc) {
76	futex_up(&cwd_futex);	76	futex_up(&cwd_futex);
77	return NULL;	77	return NULL;
78	}	78	}
79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);	79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
80	ncwd_path_nc[cwd_size] = '/';	80	ncwd_path_nc[cwd_size] = '/';
81	ncwd_path_nc[cwd_size + 1] = '\0';	81	ncwd_path_nc[cwd_size + 1] = '\0';
82	} else {	82	} else {
83	ncwd_path_nc = malloc(size + 1);	83	ncwd_path_nc = malloc(size + 1);
84	if (!ncwd_path_nc) {	84	if (!ncwd_path_nc) {
85	futex_up(&cwd_futex);	85	futex_up(&cwd_futex);
86	return NULL;	86	return NULL;
87	}	87	}
88	ncwd_path_nc[0] = '\0';	88	ncwd_path_nc[0] = '\0';
89	}	89	}
90	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);	90	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
91	ncwd_path = canonify(ncwd_path_nc, retlen);	91	ncwd_path = canonify(ncwd_path_nc, retlen);
92	if (!ncwd_path) {	92	if (!ncwd_path) {
93	futex_up(&cwd_futex);	93	futex_up(&cwd_futex);
94	free(ncwd_path_nc);	94	free(ncwd_path_nc);
95	return NULL;	95	return NULL;
96	}	96	}
97	/*	97	/*
98	* We need to clone ncwd_path because canonify() works in-place and thus	98	* We need to clone ncwd_path because canonify() works in-place and thus
99	* the address in ncwd_path need not be the same as ncwd_path_nc, even	99	* the address in ncwd_path need not be the same as ncwd_path_nc, even
100	* though they both point into the same dynamically allocated buffer.	100	* though they both point into the same dynamically allocated buffer.
101	*/	101	*/
102	ncwd_path = str_dup(ncwd_path);	102	ncwd_path = str_dup(ncwd_path);
103	free(ncwd_path_nc);	103	free(ncwd_path_nc);
104	if (!ncwd_path) {	104	if (!ncwd_path) {
105	futex_up(&cwd_futex);	105	futex_up(&cwd_futex);
106	return NULL;	106	return NULL;
107	}	107	}
108	futex_up(&cwd_futex);	108	futex_up(&cwd_futex);
109	return ncwd_path;	109	return ncwd_path;
110	}	110	}
111		111
112	static void vfs_connect(void)	112	static void vfs_connect(void)
113	{	113	{
114	while (vfs_phone < 0)	114	while (vfs_phone < 0)
115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);	115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
116	}	116	}
117		117
118	static int device_get_handle(const char name, dev_handle_t handle,	118	static int device_get_handle(const char name, dev_handle_t handle,
119	const unsigned int flags)	119	const unsigned int flags)
120	{	120	{
121	int phone;	121	int phone;
122		122
123	if (flags & IPC_FLAG_BLOCKING)	123	if (flags & IPC_FLAG_BLOCKING)
124	phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	124	phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
125	else	125	else
126	phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	126	phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);
127		127
128	if (phone < 0)	128	if (phone < 0)
129	return phone;	129	return phone;
130		130
131	ipc_call_t answer;	131	ipc_call_t answer;
132	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,	132	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,
133	&answer);	133	&answer);
134		134
135	ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);	135	ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);
136		136
137	if (retval != EOK) {	137	if (retval != EOK) {
138	async_wait_for(req, NULL);	138	async_wait_for(req, NULL);
139	ipc_hangup(phone);	139	ipc_hangup(phone);
140	return retval;	140	return retval;
141	}	141	}
142		142
143	async_wait_for(req, &retval);	143	async_wait_for(req, &retval);
144		144
145	if (handle != NULL)	145	if (handle != NULL)
146	*handle = -1;	146	*handle = -1;
147		147
148	if (retval == EOK) {	148	if (retval == EOK) {
149	if (handle != NULL)	149	if (handle != NULL)
150	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	150	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
151	}	151	}
152		152
153	ipc_hangup(phone);	153	ipc_hangup(phone);
154	return retval;	154	return retval;
155	}	155	}
156		156
157	int mount(const char fs_name, const char mp, const char *dev,	157	int mount(const char fs_name, const char mp, const char *dev,
158	const unsigned int flags)	158	const char *opts, const unsigned int flags)
159	{	159	{
160	int res;	160	int res;
161	ipcarg_t rc;	161	ipcarg_t rc;
162	aid_t req;	162	aid_t req;
163	dev_handle_t dev_handle;	163	dev_handle_t dev_handle;
164		164
165	res = device_get_handle(dev, &dev_handle, flags);	165	res = device_get_handle(dev, &dev_handle, flags);
166	if (res != EOK)	166	if (res != EOK)
167	return res;	167	return res;
168		168
169	size_t mpa_size;	169	size_t mpa_size;
170	char *mpa = absolutize(mp, &mpa_size);	170	char *mpa = absolutize(mp, &mpa_size);
171	if (!mpa)	171	if (!mpa)
172	return ENOMEM;	172	return ENOMEM;
173		173
174	futex_down(&vfs_phone_futex);	174	futex_down(&vfs_phone_futex);
175	async_serialize_start();	175	async_serialize_start();
176	vfs_connect();	176	vfs_connect();
177		177
178	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);	178	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
179	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);	179	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
180	if (rc != EOK) {	180	if (rc != EOK) {
181	async_wait_for(req, NULL);	181	async_wait_for(req, NULL);
182	async_serialize_end();	182	async_serialize_end();
183	futex_up(&vfs_phone_futex);	183	futex_up(&vfs_phone_futex);
184	free(mpa);	184	free(mpa);
185	return (int) rc;	185	return (int) rc;
186	}	186	}
187		187
-		188	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));
-		189	if (rc != EOK) {
-		190	async_wait_for(req, NULL);
-		191	async_serialize_end();
-		192	futex_up(&vfs_phone_futex);
-		193	free(mpa);
-		194	return (int) rc;
-		195	}
-		196
188	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));	197	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
189	if (rc != EOK) {	198	if (rc != EOK) {
190	async_wait_for(req, NULL);	199	async_wait_for(req, NULL);
191	async_serialize_end();	200	async_serialize_end();
192	futex_up(&vfs_phone_futex);	201	futex_up(&vfs_phone_futex);
193	free(mpa);	202	free(mpa);
194	return (int) rc;	203	return (int) rc;
195	}	204	}
196		205
197	/* Ask VFS whether it likes fs_name. */	206	/* Ask VFS whether it likes fs_name. */
198	rc = async_req_0_0(vfs_phone, IPC_M_PING);	207	rc = async_req_0_0(vfs_phone, IPC_M_PING);
199	if (rc != EOK) {	208	if (rc != EOK) {
200	async_wait_for(req, NULL);	209	async_wait_for(req, NULL);
201	async_serialize_end();	210	async_serialize_end();
202	futex_up(&vfs_phone_futex);	211	futex_up(&vfs_phone_futex);
203	free(mpa);	212	free(mpa);
204	return (int) rc;	213	return (int) rc;
205	}	214	}
206		215
207	async_wait_for(req, &rc);	216	async_wait_for(req, &rc);
208	async_serialize_end();	217	async_serialize_end();
209	futex_up(&vfs_phone_futex);	218	futex_up(&vfs_phone_futex);
210	free(mpa);	219	free(mpa);
211		220
212	return (int) rc;	221	return (int) rc;
213	}	222	}
214		223
215	static int _open(const char *path, int lflag, int oflag, ...)	224	static int _open(const char *path, int lflag, int oflag, ...)
216	{	225	{
217	ipcarg_t rc;	226	ipcarg_t rc;
218	ipc_call_t answer;	227	ipc_call_t answer;
219	aid_t req;	228	aid_t req;
220		229
221	size_t pa_size;	230	size_t pa_size;
222	char *pa = absolutize(path, &pa_size);	231	char *pa = absolutize(path, &pa_size);
223	if (!pa)	232	if (!pa)
224	return ENOMEM;	233	return ENOMEM;
225		234
226	futex_down(&vfs_phone_futex);	235	futex_down(&vfs_phone_futex);
227	async_serialize_start();	236	async_serialize_start();
228	vfs_connect();	237	vfs_connect();
229		238
230	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	239	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
231	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	240	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
232	if (rc != EOK) {	241	if (rc != EOK) {
233	async_wait_for(req, NULL);	242	async_wait_for(req, NULL);
234	async_serialize_end();	243	async_serialize_end();
235	futex_up(&vfs_phone_futex);	244	futex_up(&vfs_phone_futex);
236	free(pa);	245	free(pa);
237	return (int) rc;	246	return (int) rc;
238	}	247	}
239	async_wait_for(req, &rc);	248	async_wait_for(req, &rc);
240	async_serialize_end();	249	async_serialize_end();
241	futex_up(&vfs_phone_futex);	250	futex_up(&vfs_phone_futex);
242	free(pa);	251	free(pa);
243		252
244	if (rc != EOK)	253	if (rc != EOK)
245	return (int) rc;	254	return (int) rc;
246	return (int) IPC_GET_ARG1(answer);	255	return (int) IPC_GET_ARG1(answer);
247	}	256	}
248		257
249	int open(const char *path, int oflag, ...)	258	int open(const char *path, int oflag, ...)
250	{	259	{
251	return _open(path, L_FILE, oflag);	260	return _open(path, L_FILE, oflag);
252	}	261	}
253		262
254	int close(int fildes)	263	int close(int fildes)
255	{	264	{
256	ipcarg_t rc;	265	ipcarg_t rc;
257		266
258	futex_down(&vfs_phone_futex);	267	futex_down(&vfs_phone_futex);
259	async_serialize_start();	268	async_serialize_start();
260	vfs_connect();	269	vfs_connect();
261		270
262	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	271	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
263		272
264	async_serialize_end();	273	async_serialize_end();
265	futex_up(&vfs_phone_futex);	274	futex_up(&vfs_phone_futex);
266		275
267	return (int)rc;	276	return (int)rc;
268	}	277	}
269		278
270	ssize_t read(int fildes, void *buf, size_t nbyte)	279	ssize_t read(int fildes, void *buf, size_t nbyte)
271	{	280	{
272	ipcarg_t rc;	281	ipcarg_t rc;
273	ipc_call_t answer;	282	ipc_call_t answer;
274	aid_t req;	283	aid_t req;
275		284
276	futex_down(&vfs_phone_futex);	285	futex_down(&vfs_phone_futex);
277	async_serialize_start();	286	async_serialize_start();
278	vfs_connect();	287	vfs_connect();
279		288
280	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	289	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
281	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	290	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
282	if (rc != EOK) {	291	if (rc != EOK) {
283	async_wait_for(req, NULL);	292	async_wait_for(req, NULL);
284	async_serialize_end();	293	async_serialize_end();
285	futex_up(&vfs_phone_futex);	294	futex_up(&vfs_phone_futex);
286	return (ssize_t) rc;	295	return (ssize_t) rc;
287	}	296	}
288	async_wait_for(req, &rc);	297	async_wait_for(req, &rc);
289	async_serialize_end();	298	async_serialize_end();
290	futex_up(&vfs_phone_futex);	299	futex_up(&vfs_phone_futex);
291	if (rc == EOK)	300	if (rc == EOK)
292	return (ssize_t) IPC_GET_ARG1(answer);	301	return (ssize_t) IPC_GET_ARG1(answer);
293	else	302	else
294	return rc;	303	return rc;
295	}	304	}
296		305
297	ssize_t write(int fildes, const void *buf, size_t nbyte)	306	ssize_t write(int fildes, const void *buf, size_t nbyte)
298	{	307	{
299	ipcarg_t rc;	308	ipcarg_t rc;
300	ipc_call_t answer;	309	ipc_call_t answer;
301	aid_t req;	310	aid_t req;
302		311
303	futex_down(&vfs_phone_futex);	312	futex_down(&vfs_phone_futex);
304	async_serialize_start();	313	async_serialize_start();
305	vfs_connect();	314	vfs_connect();
306		315
307	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	316	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
308	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	317	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
309	if (rc != EOK) {	318	if (rc != EOK) {
310	async_wait_for(req, NULL);	319	async_wait_for(req, NULL);
311	async_serialize_end();	320	async_serialize_end();
312	futex_up(&vfs_phone_futex);	321	futex_up(&vfs_phone_futex);
313	return (ssize_t) rc;	322	return (ssize_t) rc;
314	}	323	}
315	async_wait_for(req, &rc);	324	async_wait_for(req, &rc);
316	async_serialize_end();	325	async_serialize_end();
317	futex_up(&vfs_phone_futex);	326	futex_up(&vfs_phone_futex);
318	if (rc == EOK)	327	if (rc == EOK)
319	return (ssize_t) IPC_GET_ARG1(answer);	328	return (ssize_t) IPC_GET_ARG1(answer);
320	else	329	else
321	return -1;	330	return -1;
322	}	331	}
323		332
324	off_t lseek(int fildes, off_t offset, int whence)	333	off_t lseek(int fildes, off_t offset, int whence)
325	{	334	{
326	ipcarg_t rc;	335	ipcarg_t rc;
327		336
328	futex_down(&vfs_phone_futex);	337	futex_down(&vfs_phone_futex);
329	async_serialize_start();	338	async_serialize_start();
330	vfs_connect();	339	vfs_connect();
331		340
332	ipcarg_t newoffs;	341	ipcarg_t newoffs;
333	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	342	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
334	&newoffs);	343	&newoffs);
335		344
336	async_serialize_end();	345	async_serialize_end();
337	futex_up(&vfs_phone_futex);	346	futex_up(&vfs_phone_futex);
338		347
339	if (rc != EOK)	348	if (rc != EOK)
340	return (off_t) -1;	349	return (off_t) -1;
341		350
342	return (off_t) newoffs;	351	return (off_t) newoffs;
343	}	352	}
344		353
345	int ftruncate(int fildes, off_t length)	354	int ftruncate(int fildes, off_t length)
346	{	355	{
347	ipcarg_t rc;	356	ipcarg_t rc;
348		357
349	futex_down(&vfs_phone_futex);	358	futex_down(&vfs_phone_futex);
350	async_serialize_start();	359	async_serialize_start();
351	vfs_connect();	360	vfs_connect();
352		361
353	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	362	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
354	async_serialize_end();	363	async_serialize_end();
355	futex_up(&vfs_phone_futex);	364	futex_up(&vfs_phone_futex);
356	return (int) rc;	365	return (int) rc;
357	}	366	}
358		367
359	DIR opendir(const char dirname)	368	DIR opendir(const char dirname)
360	{	369	{
361	DIR *dirp = malloc(sizeof(DIR));	370	DIR *dirp = malloc(sizeof(DIR));
362	if (!dirp)	371	if (!dirp)
363	return NULL;	372	return NULL;
364	dirp->fd = _open(dirname, L_DIRECTORY, 0);	373	dirp->fd = _open(dirname, L_DIRECTORY, 0);
365	if (dirp->fd < 0) {	374	if (dirp->fd < 0) {
366	free(dirp);	375	free(dirp);
367	return NULL;	376	return NULL;
368	}	377	}
369	return dirp;	378	return dirp;
370	}	379	}
371		380
372	struct dirent readdir(DIR dirp)	381	struct dirent readdir(DIR dirp)
373	{	382	{
374	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	383	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
375	if (len <= 0)	384	if (len <= 0)
376	return NULL;	385	return NULL;
377	return &dirp->res;	386	return &dirp->res;
378	}	387	}
379		388
380	void rewinddir(DIR *dirp)	389	void rewinddir(DIR *dirp)
381	{	390	{
382	(void) lseek(dirp->fd, 0, SEEK_SET);	391	(void) lseek(dirp->fd, 0, SEEK_SET);
383	}	392	}
384		393
385	int closedir(DIR *dirp)	394	int closedir(DIR *dirp)
386	{	395	{
387	(void) close(dirp->fd);	396	(void) close(dirp->fd);
388	free(dirp);	397	free(dirp);
389	return 0;	398	return 0;
390	}	399	}
391		400
392	int mkdir(const char *path, mode_t mode)	401	int mkdir(const char *path, mode_t mode)
393	{	402	{
394	ipcarg_t rc;	403	ipcarg_t rc;
395	aid_t req;	404	aid_t req;
396		405
397	size_t pa_size;	406	size_t pa_size;
398	char *pa = absolutize(path, &pa_size);	407	char *pa = absolutize(path, &pa_size);
399	if (!pa)	408	if (!pa)
400	return ENOMEM;	409	return ENOMEM;
401		410
402	futex_down(&vfs_phone_futex);	411	futex_down(&vfs_phone_futex);
403	async_serialize_start();	412	async_serialize_start();
404	vfs_connect();	413	vfs_connect();
405		414
406	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	415	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
407	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	416	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
408	if (rc != EOK) {	417	if (rc != EOK) {
409	async_wait_for(req, NULL);	418	async_wait_for(req, NULL);
410	async_serialize_end();	419	async_serialize_end();
411	futex_up(&vfs_phone_futex);	420	futex_up(&vfs_phone_futex);
412	free(pa);	421	free(pa);
413	return (int) rc;	422	return (int) rc;
414	}	423	}
415	async_wait_for(req, &rc);	424	async_wait_for(req, &rc);
416	async_serialize_end();	425	async_serialize_end();
417	futex_up(&vfs_phone_futex);	426	futex_up(&vfs_phone_futex);
418	free(pa);	427	free(pa);
419	return rc;	428	return rc;
420	}	429	}
421		430
422	static int _unlink(const char *path, int lflag)	431	static int _unlink(const char *path, int lflag)
423	{	432	{
424	ipcarg_t rc;	433	ipcarg_t rc;
425	aid_t req;	434	aid_t req;
426		435
427	size_t pa_size;	436	size_t pa_size;
428	char *pa = absolutize(path, &pa_size);	437	char *pa = absolutize(path, &pa_size);
429	if (!pa)	438	if (!pa)
430	return ENOMEM;	439	return ENOMEM;
431		440
432	futex_down(&vfs_phone_futex);	441	futex_down(&vfs_phone_futex);
433	async_serialize_start();	442	async_serialize_start();
434	vfs_connect();	443	vfs_connect();
435		444
436	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	445	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
437	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	446	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
438	if (rc != EOK) {	447	if (rc != EOK) {
439	async_wait_for(req, NULL);	448	async_wait_for(req, NULL);
440	async_serialize_end();	449	async_serialize_end();
441	futex_up(&vfs_phone_futex);	450	futex_up(&vfs_phone_futex);
442	free(pa);	451	free(pa);
443	return (int) rc;	452	return (int) rc;
444	}	453	}
445	async_wait_for(req, &rc);	454	async_wait_for(req, &rc);
446	async_serialize_end();	455	async_serialize_end();
447	futex_up(&vfs_phone_futex);	456	futex_up(&vfs_phone_futex);
448	free(pa);	457	free(pa);
449	return rc;	458	return rc;
450	}	459	}
451		460
452	int unlink(const char *path)	461	int unlink(const char *path)
453	{	462	{
454	return _unlink(path, L_NONE);	463	return _unlink(path, L_NONE);
455	}	464	}
456		465
457	int rmdir(const char *path)	466	int rmdir(const char *path)
458	{	467	{
459	return _unlink(path, L_DIRECTORY);	468	return _unlink(path, L_DIRECTORY);
460	}	469	}
461		470
462	int rename(const char old, const char new)	471	int rename(const char old, const char new)
463	{	472	{
464	ipcarg_t rc;	473	ipcarg_t rc;
465	aid_t req;	474	aid_t req;
466		475
467	size_t olda_size;	476	size_t olda_size;
468	char *olda = absolutize(old, &olda_size);	477	char *olda = absolutize(old, &olda_size);
469	if (!olda)	478	if (!olda)
470	return ENOMEM;	479	return ENOMEM;
471		480
472	size_t newa_size;	481	size_t newa_size;
473	char *newa = absolutize(new, &newa_size);	482	char *newa = absolutize(new, &newa_size);
474	if (!newa) {	483	if (!newa) {
475	free(olda);	484	free(olda);
476	return ENOMEM;	485	return ENOMEM;
477	}	486	}
478		487
479	futex_down(&vfs_phone_futex);	488	futex_down(&vfs_phone_futex);
480	async_serialize_start();	489	async_serialize_start();
481	vfs_connect();	490	vfs_connect();
482		491
483	req = async_send_0(vfs_phone, VFS_RENAME, NULL);	492	req = async_send_0(vfs_phone, VFS_RENAME, NULL);
484	rc = ipc_data_write_start(vfs_phone, olda, olda_size);	493	rc = ipc_data_write_start(vfs_phone, olda, olda_size);
485	if (rc != EOK) {	494	if (rc != EOK) {
486	async_wait_for(req, NULL);	495	async_wait_for(req, NULL);
487	async_serialize_end();	496	async_serialize_end();
488	futex_up(&vfs_phone_futex);	497	futex_up(&vfs_phone_futex);
489	free(olda);	498	free(olda);
490	free(newa);	499	free(newa);
491	return (int) rc;	500	return (int) rc;

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c – Rev 4302 → 4305