WebSVN – HelenOS – Diff – /branches/sparc/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_len = 0;
 
char *absolutize(const char *path, size_t *retlen)
{
    char *ncwd_path;
    char *ncwd_path_nc;
 
    futex_down(&cwd_futex);
    size_t len = strlen(path);
    if (*path != '/') {
        if (!cwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc = malloc(cwd_len + 1 + len + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        strcpy(ncwd_path_nc, cwd_path);
        ncwd_path_nc[cwd_len] = '/';
        ncwd_path_nc[cwd_len + 1] = '\0';
    } else {
        ncwd_path_nc = malloc(len + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc[0] = '\0';
    }
    strcat(ncwd_path_nc, 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 = strdup(ncwd_path);
    free(ncwd_path_nc);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        return NULL;
    }
    futex_up(&cwd_futex);
    return ncwd_path;
}
 
static int vfs_connect(void)
{
    if (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
    return vfs_phone;
}
 
static int device_get_handle(const char *name, dev_handle_t *handle)
{
    int 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, 0, 0,
        &answer);
   
    ipcarg_t retval = ipc_data_write_start(phone, name, strlen(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)
{
    int res;
    ipcarg_t rc;
    aid_t req;
    dev_handle_t dev_handle;
   
    res = device_get_handle(dev, &dev_handle);
    if (res != EOK)
        return res;
   
    size_t mpa_len;
    char *mpa = absolutize(mp, &mpa_len);
    if (!mpa)
        return ENOMEM;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            free(mpa);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
    rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(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;
    }
    rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
    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, ...)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            free(pa);
            return res;
        }
    }
    req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, pa, pa_len);
    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)
{
    int res;
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
       
    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)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    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)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    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)
{
    int res;
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
       
    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)
{
    int res;
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    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)
{
    int res;
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            free(pa);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_len);
    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)
{
    int res;
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_len;
    char *pa = absolutize(path, &pa_len);
    if (!pa)
        return ENOMEM;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            free(pa);
            return res;
        }
    }
    req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_len);
    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)
{
    int res;
    ipcarg_t rc;
    aid_t req;
   
    size_t olda_len;
    char *olda = absolutize(old, &olda_len);
    if (!olda)
        return ENOMEM;
 
    size_t newa_len;
    char *newa = absolutize(new, &newa_len);
    if (!newa) {
        free(olda);
        return ENOMEM;
    }
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            free(olda);
            free(newa);
            return res;
        }
    }
    req = async_send_0(vfs_phone, VFS_RENAME, NULL);
    rc = ipc_data_write_start(vfs_phone, olda, olda_len);
    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_len);
    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_len;
    char *pa = absolutize(path, &pa_len);
    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_len = 0;
    }
    cwd_dir = d;
    cwd_path = pa;
    cwd_len = pa_len;
    futex_up(&cwd_futex);
    return EOK;
}
 
char *getcwd(char *buf, size_t size)
{
    if (!size)
        return NULL;
    futex_down(&cwd_futex);
    if (size < cwd_len + 1) {
        futex_up(&cwd_futex);
        return NULL;
    }
    strcpy(buf, cwd_path);
    futex_up(&cwd_futex);
    return buf;
}
 
/** @}
 */
 

Rev 3343	Rev 3492
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_len = 0;	60	size_t cwd_len = 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 len = strlen(path);	68	size_t len = strlen(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_len + 1 + len + 1);	74	ncwd_path_nc = malloc(cwd_len + 1 + len + 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	strcpy(ncwd_path_nc, cwd_path);	79	strcpy(ncwd_path_nc, cwd_path);
80	ncwd_path_nc[cwd_len] = '/';	80	ncwd_path_nc[cwd_len] = '/';
81	ncwd_path_nc[cwd_len + 1] = '\0';	81	ncwd_path_nc[cwd_len + 1] = '\0';
82	} else {	82	} else {
83	ncwd_path_nc = malloc(len + 1);	83	ncwd_path_nc = malloc(len + 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	strcat(ncwd_path_nc, path);	90	strcat(ncwd_path_nc, 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 = strdup(ncwd_path);	102	ncwd_path = strdup(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 int vfs_connect(void)	112	static int vfs_connect(void)
113	{	113	{
114	if (vfs_phone < 0)	114	if (vfs_phone < 0)
115	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);	115	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
116	return vfs_phone;	116	return vfs_phone;
117	}	117	}
118		118
119	static int device_get_handle(char name, dev_handle_t handle)	119	static int device_get_handle(const char name, dev_handle_t handle)
120	{	120	{
121	int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT,	121	int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT,
122	0);	122	0);
123	if (phone < 0)	123	if (phone < 0)
124	return phone;	124	return phone;
125		125
126	ipc_call_t answer;	126	ipc_call_t answer;
127	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,	127	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0,
128	&answer);	128	&answer);
129		129
130	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);	130	ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1);
131		131
132	if (retval != EOK) {	132	if (retval != EOK) {
133	async_wait_for(req, NULL);	133	async_wait_for(req, NULL);
134	ipc_hangup(phone);	134	ipc_hangup(phone);
135	return retval;	135	return retval;
136	}	136	}
137		137
138	async_wait_for(req, &retval);	138	async_wait_for(req, &retval);
139		139
140	if (handle != NULL)	140	if (handle != NULL)
141	*handle = -1;	141	*handle = -1;
142		142
143	if (retval == EOK) {	143	if (retval == EOK) {
144	if (handle != NULL)	144	if (handle != NULL)
145	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	145	*handle = (dev_handle_t) IPC_GET_ARG1(answer);
146	}	146	}
147		147
148	ipc_hangup(phone);	148	ipc_hangup(phone);
149	return retval;	149	return retval;
150	}	150	}
151		151
152	int mount(const char fs_name, const char mp, const char *dev)	152	int mount(const char fs_name, const char mp, const char *dev)
153	{	153	{
154	int res;	154	int res;
155	ipcarg_t rc;	155	ipcarg_t rc;
156	aid_t req;	156	aid_t req;
157	dev_handle_t dev_handle;	157	dev_handle_t dev_handle;
158		158
159	res = device_get_handle(dev, &dev_handle);	159	res = device_get_handle(dev, &dev_handle);
160	if (res != EOK)	160	if (res != EOK)
161	return res;	161	return res;
162		162
163	size_t mpa_len;	163	size_t mpa_len;
164	char *mpa = absolutize(mp, &mpa_len);	164	char *mpa = absolutize(mp, &mpa_len);
165	if (!mpa)	165	if (!mpa)
166	return ENOMEM;	166	return ENOMEM;
167		167
168	futex_down(&vfs_phone_futex);	168	futex_down(&vfs_phone_futex);
169	async_serialize_start();	169	async_serialize_start();
170	if (vfs_phone < 0) {	170	if (vfs_phone < 0) {
171	res = vfs_connect();	171	res = vfs_connect();
172	if (res < 0) {	172	if (res < 0) {
173	async_serialize_end();	173	async_serialize_end();
174	futex_up(&vfs_phone_futex);	174	futex_up(&vfs_phone_futex);
175	free(mpa);	175	free(mpa);
176	return res;	176	return res;
177	}	177	}
178	}	178	}
179	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	179	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
180	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));	180	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
181	if (rc != EOK) {	181	if (rc != EOK) {
182	async_wait_for(req, NULL);	182	async_wait_for(req, NULL);
183	async_serialize_end();	183	async_serialize_end();
184	futex_up(&vfs_phone_futex);	184	futex_up(&vfs_phone_futex);
185	free(mpa);	185	free(mpa);
186	return (int) rc;	186	return (int) rc;
187	}	187	}
188	/* Ask VFS whether it likes fs_name. */	188	/* Ask VFS whether it likes fs_name. */
189	rc = async_req_0_0(vfs_phone, IPC_M_PING);	189	rc = async_req_0_0(vfs_phone, IPC_M_PING);
190	if (rc != EOK) {	190	if (rc != EOK) {
191	async_wait_for(req, NULL);	191	async_wait_for(req, NULL);
192	async_serialize_end();	192	async_serialize_end();
193	futex_up(&vfs_phone_futex);	193	futex_up(&vfs_phone_futex);
194	free(mpa);	194	free(mpa);
195	return (int) rc;	195	return (int) rc;
196	}	196	}
197	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);	197	rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len);
198	if (rc != EOK) {	198	if (rc != EOK) {
199	async_wait_for(req, NULL);	199	async_wait_for(req, NULL);
200	async_serialize_end();	200	async_serialize_end();
201	futex_up(&vfs_phone_futex);	201	futex_up(&vfs_phone_futex);
202	free(mpa);	202	free(mpa);
203	return (int) rc;	203	return (int) rc;
204	}	204	}
205	async_wait_for(req, &rc);	205	async_wait_for(req, &rc);
206	async_serialize_end();	206	async_serialize_end();
207	futex_up(&vfs_phone_futex);	207	futex_up(&vfs_phone_futex);
208	free(mpa);	208	free(mpa);
209	return (int) rc;	209	return (int) rc;
210	}	210	}
211		211
212	static int _open(const char *path, int lflag, int oflag, ...)	212	static int _open(const char *path, int lflag, int oflag, ...)
213	{	213	{
214	int res;	214	int res;
215	ipcarg_t rc;	215	ipcarg_t rc;
216	ipc_call_t answer;	216	ipc_call_t answer;
217	aid_t req;	217	aid_t req;
218		218
219	size_t pa_len;	219	size_t pa_len;
220	char *pa = absolutize(path, &pa_len);	220	char *pa = absolutize(path, &pa_len);
221	if (!pa)	221	if (!pa)
222	return ENOMEM;	222	return ENOMEM;
223		223
224	futex_down(&vfs_phone_futex);	224	futex_down(&vfs_phone_futex);
225	async_serialize_start();	225	async_serialize_start();
226	if (vfs_phone < 0) {	226	if (vfs_phone < 0) {
227	res = vfs_connect();	227	res = vfs_connect();
228	if (res < 0) {	228	if (res < 0) {
229	async_serialize_end();	229	async_serialize_end();
230	futex_up(&vfs_phone_futex);	230	futex_up(&vfs_phone_futex);
231	free(pa);	231	free(pa);
232	return res;	232	return res;
233	}	233	}
234	}	234	}
235	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	235	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
236	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	236	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
237	if (rc != EOK) {	237	if (rc != EOK) {
238	async_wait_for(req, NULL);	238	async_wait_for(req, NULL);
239	async_serialize_end();	239	async_serialize_end();
240	futex_up(&vfs_phone_futex);	240	futex_up(&vfs_phone_futex);
241	free(pa);	241	free(pa);
242	return (int) rc;	242	return (int) rc;
243	}	243	}
244	async_wait_for(req, &rc);	244	async_wait_for(req, &rc);
245	async_serialize_end();	245	async_serialize_end();
246	futex_up(&vfs_phone_futex);	246	futex_up(&vfs_phone_futex);
247	free(pa);	247	free(pa);
248		248
249	if (rc != EOK)	249	if (rc != EOK)
250	return (int) rc;	250	return (int) rc;
251	return (int) IPC_GET_ARG1(answer);	251	return (int) IPC_GET_ARG1(answer);
252	}	252	}
253		253
254	int open(const char *path, int oflag, ...)	254	int open(const char *path, int oflag, ...)
255	{	255	{
256	return _open(path, L_FILE, oflag);	256	return _open(path, L_FILE, oflag);
257	}	257	}
258		258
259	int close(int fildes)	259	int close(int fildes)
260	{	260	{
261	int res;	261	int res;
262	ipcarg_t rc;	262	ipcarg_t rc;
263		263
264	futex_down(&vfs_phone_futex);	264	futex_down(&vfs_phone_futex);
265	async_serialize_start();	265	async_serialize_start();
266	if (vfs_phone < 0) {	266	if (vfs_phone < 0) {
267	res = vfs_connect();	267	res = vfs_connect();
268	if (res < 0) {	268	if (res < 0) {
269	async_serialize_end();	269	async_serialize_end();
270	futex_up(&vfs_phone_futex);	270	futex_up(&vfs_phone_futex);
271	return res;	271	return res;
272	}	272	}
273	}	273	}
274		274
275	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	275	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
276		276
277	async_serialize_end();	277	async_serialize_end();
278	futex_up(&vfs_phone_futex);	278	futex_up(&vfs_phone_futex);
279		279
280	return (int)rc;	280	return (int)rc;
281	}	281	}
282		282
283	ssize_t read(int fildes, void *buf, size_t nbyte)	283	ssize_t read(int fildes, void *buf, size_t nbyte)
284	{	284	{
285	int res;	285	int res;
286	ipcarg_t rc;	286	ipcarg_t rc;
287	ipc_call_t answer;	287	ipc_call_t answer;
288	aid_t req;	288	aid_t req;
289		289
290	futex_down(&vfs_phone_futex);	290	futex_down(&vfs_phone_futex);
291	async_serialize_start();	291	async_serialize_start();
292	if (vfs_phone < 0) {	292	if (vfs_phone < 0) {
293	res = vfs_connect();	293	res = vfs_connect();
294	if (res < 0) {	294	if (res < 0) {
295	async_serialize_end();	295	async_serialize_end();
296	futex_up(&vfs_phone_futex);	296	futex_up(&vfs_phone_futex);
297	return res;	297	return res;
298	}	298	}
299	}	299	}
300	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	300	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
301	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	301	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
302	if (rc != EOK) {	302	if (rc != EOK) {
303	async_wait_for(req, NULL);	303	async_wait_for(req, NULL);
304	async_serialize_end();	304	async_serialize_end();
305	futex_up(&vfs_phone_futex);	305	futex_up(&vfs_phone_futex);
306	return (ssize_t) rc;	306	return (ssize_t) rc;
307	}	307	}
308	async_wait_for(req, &rc);	308	async_wait_for(req, &rc);
309	async_serialize_end();	309	async_serialize_end();
310	futex_up(&vfs_phone_futex);	310	futex_up(&vfs_phone_futex);
311	if (rc == EOK)	311	if (rc == EOK)
312	return (ssize_t) IPC_GET_ARG1(answer);	312	return (ssize_t) IPC_GET_ARG1(answer);
313	else	313	else
314	return rc;	314	return rc;
315	}	315	}
316		316
317	ssize_t write(int fildes, const void *buf, size_t nbyte)	317	ssize_t write(int fildes, const void *buf, size_t nbyte)
318	{	318	{
319	int res;	319	int res;
320	ipcarg_t rc;	320	ipcarg_t rc;
321	ipc_call_t answer;	321	ipc_call_t answer;
322	aid_t req;	322	aid_t req;
323		323
324	futex_down(&vfs_phone_futex);	324	futex_down(&vfs_phone_futex);
325	async_serialize_start();	325	async_serialize_start();
326	if (vfs_phone < 0) {	326	if (vfs_phone < 0) {
327	res = vfs_connect();	327	res = vfs_connect();
328	if (res < 0) {	328	if (res < 0) {
329	async_serialize_end();	329	async_serialize_end();
330	futex_up(&vfs_phone_futex);	330	futex_up(&vfs_phone_futex);
331	return res;	331	return res;
332	}	332	}
333	}	333	}
334	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	334	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
335	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	335	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
336	if (rc != EOK) {	336	if (rc != EOK) {
337	async_wait_for(req, NULL);	337	async_wait_for(req, NULL);
338	async_serialize_end();	338	async_serialize_end();
339	futex_up(&vfs_phone_futex);	339	futex_up(&vfs_phone_futex);
340	return (ssize_t) rc;	340	return (ssize_t) rc;
341	}	341	}
342	async_wait_for(req, &rc);	342	async_wait_for(req, &rc);
343	async_serialize_end();	343	async_serialize_end();
344	futex_up(&vfs_phone_futex);	344	futex_up(&vfs_phone_futex);
345	if (rc == EOK)	345	if (rc == EOK)
346	return (ssize_t) IPC_GET_ARG1(answer);	346	return (ssize_t) IPC_GET_ARG1(answer);
347	else	347	else
348	return -1;	348	return -1;
349	}	349	}
350		350
351	off_t lseek(int fildes, off_t offset, int whence)	351	off_t lseek(int fildes, off_t offset, int whence)
352	{	352	{
353	int res;	353	int res;
354	ipcarg_t rc;	354	ipcarg_t rc;
355		355
356	futex_down(&vfs_phone_futex);	356	futex_down(&vfs_phone_futex);
357	async_serialize_start();	357	async_serialize_start();
358	if (vfs_phone < 0) {	358	if (vfs_phone < 0) {
359	res = vfs_connect();	359	res = vfs_connect();
360	if (res < 0) {	360	if (res < 0) {
361	async_serialize_end();	361	async_serialize_end();
362	futex_up(&vfs_phone_futex);	362	futex_up(&vfs_phone_futex);
363	return res;	363	return res;
364	}	364	}
365	}	365	}
366		366
367	off_t newoffs;	367	ipcarg_t newoffs;
368	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	368	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
369	(ipcarg_t)&newoffs);	369	&newoffs);
370		370
371	async_serialize_end();	371	async_serialize_end();
372	futex_up(&vfs_phone_futex);	372	futex_up(&vfs_phone_futex);
373		373
374	if (rc != EOK)	374	if (rc != EOK)
375	return (off_t) -1;	375	return (off_t) -1;
376		376
377	return newoffs;	377	return (off_t) newoffs;
378	}	378	}
379		379
380	int ftruncate(int fildes, off_t length)	380	int ftruncate(int fildes, off_t length)
381	{	381	{
382	int res;	382	int res;
383	ipcarg_t rc;	383	ipcarg_t rc;
384		384
385	futex_down(&vfs_phone_futex);	385	futex_down(&vfs_phone_futex);
386	async_serialize_start();	386	async_serialize_start();
387	if (vfs_phone < 0) {	387	if (vfs_phone < 0) {
388	res = vfs_connect();	388	res = vfs_connect();
389	if (res < 0) {	389	if (res < 0) {
390	async_serialize_end();	390	async_serialize_end();
391	futex_up(&vfs_phone_futex);	391	futex_up(&vfs_phone_futex);
392	return res;	392	return res;
393	}	393	}
394	}	394	}
395	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	395	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
396	async_serialize_end();	396	async_serialize_end();
397	futex_up(&vfs_phone_futex);	397	futex_up(&vfs_phone_futex);
398	return (int) rc;	398	return (int) rc;
399	}	399	}
400		400
401	DIR opendir(const char dirname)	401	DIR opendir(const char dirname)
402	{	402	{
403	DIR *dirp = malloc(sizeof(DIR));	403	DIR *dirp = malloc(sizeof(DIR));
404	if (!dirp)	404	if (!dirp)
405	return NULL;	405	return NULL;
406	dirp->fd = _open(dirname, L_DIRECTORY, 0);	406	dirp->fd = _open(dirname, L_DIRECTORY, 0);
407	if (dirp->fd < 0) {	407	if (dirp->fd < 0) {
408	free(dirp);	408	free(dirp);
409	return NULL;	409	return NULL;
410	}	410	}
411	return dirp;	411	return dirp;
412	}	412	}
413		413
414	struct dirent readdir(DIR dirp)	414	struct dirent readdir(DIR dirp)
415	{	415	{
416	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	416	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
417	if (len <= 0)	417	if (len <= 0)
418	return NULL;	418	return NULL;
419	return &dirp->res;	419	return &dirp->res;
420	}	420	}
421		421
422	void rewinddir(DIR *dirp)	422	void rewinddir(DIR *dirp)
423	{	423	{
424	(void) lseek(dirp->fd, 0, SEEK_SET);	424	(void) lseek(dirp->fd, 0, SEEK_SET);
425	}	425	}
426		426
427	int closedir(DIR *dirp)	427	int closedir(DIR *dirp)
428	{	428	{
429	(void) close(dirp->fd);	429	(void) close(dirp->fd);
430	free(dirp);	430	free(dirp);
431	return 0;	431	return 0;
432	}	432	}
433		433
434	int mkdir(const char *path, mode_t mode)	434	int mkdir(const char *path, mode_t mode)
435	{	435	{
436	int res;	436	int res;
437	ipcarg_t rc;	437	ipcarg_t rc;
438	aid_t req;	438	aid_t req;
439		439
440	size_t pa_len;	440	size_t pa_len;
441	char *pa = absolutize(path, &pa_len);	441	char *pa = absolutize(path, &pa_len);
442	if (!pa)	442	if (!pa)
443	return ENOMEM;	443	return ENOMEM;
444		444
445	futex_down(&vfs_phone_futex);	445	futex_down(&vfs_phone_futex);
446	async_serialize_start();	446	async_serialize_start();
447	if (vfs_phone < 0) {	447	if (vfs_phone < 0) {
448	res = vfs_connect();	448	res = vfs_connect();
449	if (res < 0) {	449	if (res < 0) {
450	async_serialize_end();	450	async_serialize_end();
451	futex_up(&vfs_phone_futex);	451	futex_up(&vfs_phone_futex);
452	free(pa);	452	free(pa);
453	return res;	453	return res;
454	}	454	}
455	}	455	}
456	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	456	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
457	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	457	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
458	if (rc != EOK) {	458	if (rc != EOK) {
459	async_wait_for(req, NULL);	459	async_wait_for(req, NULL);
460	async_serialize_end();	460	async_serialize_end();
461	futex_up(&vfs_phone_futex);	461	futex_up(&vfs_phone_futex);
462	free(pa);	462	free(pa);
463	return (int) rc;	463	return (int) rc;
464	}	464	}
465	async_wait_for(req, &rc);	465	async_wait_for(req, &rc);
466	async_serialize_end();	466	async_serialize_end();
467	futex_up(&vfs_phone_futex);	467	futex_up(&vfs_phone_futex);
468	free(pa);	468	free(pa);
469	return rc;	469	return rc;
470	}	470	}
471		471
472	static int _unlink(const char *path, int lflag)	472	static int _unlink(const char *path, int lflag)
473	{	473	{
474	int res;	474	int res;
475	ipcarg_t rc;	475	ipcarg_t rc;
476	aid_t req;	476	aid_t req;
477		477
478	size_t pa_len;	478	size_t pa_len;
479	char *pa = absolutize(path, &pa_len);	479	char *pa = absolutize(path, &pa_len);
480	if (!pa)	480	if (!pa)
481	return ENOMEM;	481	return ENOMEM;
482		482
483	futex_down(&vfs_phone_futex);	483	futex_down(&vfs_phone_futex);
484	async_serialize_start();	484	async_serialize_start();
485	if (vfs_phone < 0) {	485	if (vfs_phone < 0) {
486	res = vfs_connect();	486	res = vfs_connect();
487	if (res < 0) {	487	if (res < 0) {
488	async_serialize_end();	488	async_serialize_end();
489	futex_up(&vfs_phone_futex);	489	futex_up(&vfs_phone_futex);
490	free(pa);	490	free(pa);
491	return res;	491	return res;
492	}	492	}
493	}	493	}
494	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	494	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
495	rc = ipc_data_write_start(vfs_phone, pa, pa_len);	495	rc = ipc_data_write_start(vfs_phone, pa, pa_len);
496	if (rc != EOK) {	496	if (rc != EOK) {
497	async_wait_for(req, NULL);	497	async_wait_for(req, NULL);
498	async_serialize_end();	498	async_serialize_end();
499	futex_up(&vfs_phone_futex);	499	futex_up(&vfs_phone_futex);
500	free(pa);	500	free(pa);

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(root)/branches/sparc/uspace/lib/libc/generic/vfs/vfs.c – Rev 3343 → 3492