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 <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 "../../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;
 
static char *absolutize(const char *path)
{
    char *ncwd_path;
 
    futex_down(&cwd_futex);
    size_t len = strlen(path);
    if (*path != '/') {
        if (!cwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path = malloc(len + cwd_len + 1);
        if (!ncwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        strcpy(ncwd_path, cwd_path);
        ncwd_path[cwd_len] = '/';
        ncwd_path[cwd_len + 1] = '\0';
    } else {
        ncwd_path = malloc(len + 1);
        if (!ncwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path[0] = '\0';
    }
    strcat(ncwd_path, path);
    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;
}
 
int mount(const char *fs_name, const char *mp, const char *dev)
{
    int res;
    ipcarg_t rc;
    aid_t req;
 
    int dev_handle = 0; /* TODO */
 
    char *mpa = absolutize(mp);
    if (!mpa)
        return ENOMEM;
    size_t mpc_len;
    char *mpc = canonify(mpa, &mpc_len);
    if (!mpc) {
        free(mpa);
        return EINVAL;
    }
 
    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;
    }
    rc = ipc_data_write_start(vfs_phone, (void *)mpc, mpc_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;
   
    char *pa = absolutize(path);
    if (!pa)
        return ENOMEM;
    size_t pc_len;
    char *pc = canonify(pa, &pc_len);
    if (!pc) {
        free(pa);
        return EINVAL;
    }
   
    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, pc, pc_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 (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 -1;
}
 
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;
        }
    }
       
    off_t newoffs;
    rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
        (ipcarg_t)&newoffs);
 
    async_serialize_end();
    futex_up(&vfs_phone_futex);
 
    if (rc != EOK)
        return (off_t) -1;
   
    return 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;
   
    char *pa = absolutize(path);
    if (!pa)
        return ENOMEM;
    size_t pc_len;
    char *pc = canonify(pa, &pc_len);
    if (!pc) {
        free(pa);
        return EINVAL;
    }
 
    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, pc, pc_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;
   
    char *pa = absolutize(path);
    if (!pa)
        return ENOMEM;
    size_t pc_len;
    char *pc = canonify(pa, &pc_len);
    if (!pc) {
        free(pa);
        return EINVAL;
    }
    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, pc, pc_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;
   
    char *olda = absolutize(old);
    if (!olda)
        return ENOMEM;
    size_t oldc_len;
    char *oldc = canonify(olda, &oldc_len);
    if (!oldc) {
        free(olda);
        return EINVAL;
    }
    char *newa = absolutize(new);
    if (!newa) {
        free(olda);
        return ENOMEM;
    }
    size_t newc_len;
    char *newc = canonify(newa, &newc_len);
    if (!newc) {
        free(olda);
        free(newa);
        return EINVAL;
    }
 
    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, oldc, oldc_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, newc, newc_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)
{
    char *pa = absolutize(path);
    if (!pa)
        return ENOMEM;
    size_t pc_len;
    char *pc = canonify(pa, &pc_len);
    if (!pc) {
        free(pa);
        return ENOENT;
    }
 
    DIR *d = opendir(pc);
    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 = pc;
    cwd_len = pc_len;
    futex_up(&cwd_futex);
}
 
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 2761	Rev 2763
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 <sys/types.h>	42	#include <sys/types.h>
43	#include <ipc/ipc.h>	43	#include <ipc/ipc.h>
44	#include <ipc/services.h>	44	#include <ipc/services.h>
45	#include <async.h>	45	#include <async.h>
46	#include <atomic.h>	46	#include <atomic.h>
47	#include <futex.h>	47	#include <futex.h>
48	#include <errno.h>	48	#include <errno.h>
49	#include <string.h>	49	#include <string.h>
50	#include "../../srv/vfs/vfs.h"	50	#include "../../srv/vfs/vfs.h"
51		51
52	int vfs_phone = -1;	52	int vfs_phone = -1;
53	futex_t vfs_phone_futex = FUTEX_INITIALIZER;	53	futex_t vfs_phone_futex = FUTEX_INITIALIZER;
54		54
55	futex_t cwd_futex = FUTEX_INITIALIZER;	55	futex_t cwd_futex = FUTEX_INITIALIZER;
56	DIR *cwd_dir = NULL;	56	DIR *cwd_dir = NULL;
57	char *cwd_path = NULL;	57	char *cwd_path = NULL;
58	size_t cwd_len = 0;	58	size_t cwd_len = 0;
59		59
60	static char absolutize(const char path)	60	static char absolutize(const char path)
61	{	61	{
62	char *ncwd_path;	62	char *ncwd_path;
63		63
64	futex_down(&cwd_futex);	64	futex_down(&cwd_futex);
65	size_t len = strlen(path);	65	size_t len = strlen(path);
66	if (*path != '/') {	66	if (*path != '/') {
67	if (!cwd_path) {	67	if (!cwd_path) {
68	futex_up(&cwd_futex);	68	futex_up(&cwd_futex);
69	return NULL;	69	return NULL;
70	}	70	}
71	ncwd_path = malloc(len + cwd_len + 1);	71	ncwd_path = malloc(len + cwd_len + 1);
72	if (!ncwd_path) {	72	if (!ncwd_path) {
73	futex_up(&cwd_futex);	73	futex_up(&cwd_futex);
74	return NULL;	74	return NULL;
75	}	75	}
76	strcpy(ncwd_path, cwd_path);	76	strcpy(ncwd_path, cwd_path);
77	ncwd_path[cwd_len] = '/';	77	ncwd_path[cwd_len] = '/';
78	ncwd_path[cwd_len + 1] = '\0';	78	ncwd_path[cwd_len + 1] = '\0';
79	} else {	79	} else {
80	ncwd_path = malloc(len + 1);	80	ncwd_path = malloc(len + 1);
81	if (!ncwd_path) {	81	if (!ncwd_path) {
82	futex_up(&cwd_futex);	82	futex_up(&cwd_futex);
83	return NULL;	83	return NULL;
84	}	84	}
85	ncwd_path[0] = '\0';	85	ncwd_path[0] = '\0';
86	}	86	}
87	strcat(ncwd_path, path);	87	strcat(ncwd_path, path);
88	futex_up(&cwd_futex);	88	futex_up(&cwd_futex);
89	return ncwd_path;	89	return ncwd_path;
90	}	90	}
91		91
92	static int vfs_connect(void)	92	static int vfs_connect(void)
93	{	93	{
94	if (vfs_phone < 0)	94	if (vfs_phone < 0)
95	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);	95	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
96	return vfs_phone;	96	return vfs_phone;
97	}	97	}
98		98
99	int mount(const char fs_name, const char mp, const char *dev)	99	int mount(const char fs_name, const char mp, const char *dev)
100	{	100	{
101	int res;	101	int res;
102	ipcarg_t rc;	102	ipcarg_t rc;
103	aid_t req;	103	aid_t req;
104		104
105	int dev_handle = 0; /* TODO */	105	int dev_handle = 0; /* TODO */
106		106
107	char *mpa = absolutize(mp);	107	char *mpa = absolutize(mp);
108	if (!mpa)	108	if (!mpa)
109	return ENOMEM;	109	return ENOMEM;
110	size_t mpc_len;	110	size_t mpc_len;
111	char *mpc = canonify(mpa, &mpc_len);	111	char *mpc = canonify(mpa, &mpc_len);
112	if (!mpc) {	112	if (!mpc) {
113	free(mpa);	113	free(mpa);
114	return EINVAL;	114	return EINVAL;
115	}	115	}
116		116
117	futex_down(&vfs_phone_futex);	117	futex_down(&vfs_phone_futex);
118	async_serialize_start();	118	async_serialize_start();
119	if (vfs_phone < 0) {	119	if (vfs_phone < 0) {
120	res = vfs_connect();	120	res = vfs_connect();
121	if (res < 0) {	121	if (res < 0) {
122	async_serialize_end();	122	async_serialize_end();
123	futex_up(&vfs_phone_futex);	123	futex_up(&vfs_phone_futex);
124	free(mpa);	124	free(mpa);
125	return res;	125	return res;
126	}	126	}
127	}	127	}
128	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	128	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
129	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));	129	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
130	if (rc != EOK) {	130	if (rc != EOK) {
131	async_wait_for(req, NULL);	131	async_wait_for(req, NULL);
132	async_serialize_end();	132	async_serialize_end();
133	futex_up(&vfs_phone_futex);	133	futex_up(&vfs_phone_futex);
134	free(mpa);	134	free(mpa);
135	return (int) rc;	135	return (int) rc;
136	}	136	}
137	rc = ipc_data_write_start(vfs_phone, (void *)mpc, mpc_len);	137	rc = ipc_data_write_start(vfs_phone, (void *)mpc, mpc_len);
138	if (rc != EOK) {	138	if (rc != EOK) {
139	async_wait_for(req, NULL);	139	async_wait_for(req, NULL);
140	async_serialize_end();	140	async_serialize_end();
141	futex_up(&vfs_phone_futex);	141	futex_up(&vfs_phone_futex);
142	free(mpa);	142	free(mpa);
143	return (int) rc;	143	return (int) rc;
144	}	144	}
145	async_wait_for(req, &rc);	145	async_wait_for(req, &rc);
146	async_serialize_end();	146	async_serialize_end();
147	futex_up(&vfs_phone_futex);	147	futex_up(&vfs_phone_futex);
148	free(mpa);	148	free(mpa);
149	return (int) rc;	149	return (int) rc;
150	}	150	}
151		151
152	static int _open(const char *path, int lflag, int oflag, ...)	152	static int _open(const char *path, int lflag, int oflag, ...)
153	{	153	{
154	int res;	154	int res;
155	ipcarg_t rc;	155	ipcarg_t rc;
156	ipc_call_t answer;	156	ipc_call_t answer;
157	aid_t req;	157	aid_t req;
158		158
159	char *pa = absolutize(path);	159	char *pa = absolutize(path);
160	if (!pa)	160	if (!pa)
161	return ENOMEM;	161	return ENOMEM;
162	size_t pc_len;	162	size_t pc_len;
163	char *pc = canonify(pa, &pc_len);	163	char *pc = canonify(pa, &pc_len);
164	if (!pc) {	164	if (!pc) {
165	free(pa);	165	free(pa);
166	return EINVAL;	166	return EINVAL;
167	}	167	}
168		168
169	futex_down(&vfs_phone_futex);	169	futex_down(&vfs_phone_futex);
170	async_serialize_start();	170	async_serialize_start();
171	if (vfs_phone < 0) {	171	if (vfs_phone < 0) {
172	res = vfs_connect();	172	res = vfs_connect();
173	if (res < 0) {	173	if (res < 0) {
174	async_serialize_end();	174	async_serialize_end();
175	futex_up(&vfs_phone_futex);	175	futex_up(&vfs_phone_futex);
176	free(pa);	176	free(pa);
177	return res;	177	return res;
178	}	178	}
179	}	179	}
180	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	180	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
181	rc = ipc_data_write_start(vfs_phone, pc, pc_len);	181	rc = ipc_data_write_start(vfs_phone, pc, pc_len);
182	if (rc != EOK) {	182	if (rc != EOK) {
183	async_wait_for(req, NULL);	183	async_wait_for(req, NULL);
184	async_serialize_end();	184	async_serialize_end();
185	futex_up(&vfs_phone_futex);	185	futex_up(&vfs_phone_futex);
186	free(pa);	186	free(pa);
187	return (int) rc;	187	return (int) rc;
188	}	188	}
189	async_wait_for(req, &rc);	189	async_wait_for(req, &rc);
190	async_serialize_end();	190	async_serialize_end();
191	futex_up(&vfs_phone_futex);	191	futex_up(&vfs_phone_futex);
192	free(pa);	192	free(pa);
193	return (int) IPC_GET_ARG1(answer);	193	return (int) IPC_GET_ARG1(answer);
194	}	194	}
195		195
196	int open(const char *path, int oflag, ...)	196	int open(const char *path, int oflag, ...)
197	{	197	{
198	return _open(path, L_FILE, oflag);	198	return _open(path, L_FILE, oflag);
199	}	199	}
200		200
201	int close(int fildes)	201	int close(int fildes)
202	{	202	{
203	int res;	203	int res;
204	ipcarg_t rc;	204	ipcarg_t rc;
205		205
206	futex_down(&vfs_phone_futex);	206	futex_down(&vfs_phone_futex);
207	async_serialize_start();	207	async_serialize_start();
208	if (vfs_phone < 0) {	208	if (vfs_phone < 0) {
209	res = vfs_connect();	209	res = vfs_connect();
210	if (res < 0) {	210	if (res < 0) {
211	async_serialize_end();	211	async_serialize_end();
212	futex_up(&vfs_phone_futex);	212	futex_up(&vfs_phone_futex);
213	return res;	213	return res;
214	}	214	}
215	}	215	}
216		216
217	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	217	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
218		218
219	async_serialize_end();	219	async_serialize_end();
220	futex_up(&vfs_phone_futex);	220	futex_up(&vfs_phone_futex);
221		221
222	return (int)rc;	222	return (int)rc;
223	}	223	}
224		224
225	ssize_t read(int fildes, void *buf, size_t nbyte)	225	ssize_t read(int fildes, void *buf, size_t nbyte)
226	{	226	{
227	int res;	227	int res;
228	ipcarg_t rc;	228	ipcarg_t rc;
229	ipc_call_t answer;	229	ipc_call_t answer;
230	aid_t req;	230	aid_t req;
231		231
232	futex_down(&vfs_phone_futex);	232	futex_down(&vfs_phone_futex);
233	async_serialize_start();	233	async_serialize_start();
234	if (vfs_phone < 0) {	234	if (vfs_phone < 0) {
235	res = vfs_connect();	235	res = vfs_connect();
236	if (res < 0) {	236	if (res < 0) {
237	async_serialize_end();	237	async_serialize_end();
238	futex_up(&vfs_phone_futex);	238	futex_up(&vfs_phone_futex);
239	return res;	239	return res;
240	}	240	}
241	}	241	}
242	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	242	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
243	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	243	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
244	if (rc != EOK) {	244	if (rc != EOK) {
245	async_wait_for(req, NULL);	245	async_wait_for(req, NULL);
246	async_serialize_end();	246	async_serialize_end();
247	futex_up(&vfs_phone_futex);	247	futex_up(&vfs_phone_futex);
248	return (ssize_t) rc;	248	return (ssize_t) rc;
249	}	249	}
250	async_wait_for(req, &rc);	250	async_wait_for(req, &rc);
251	async_serialize_end();	251	async_serialize_end();
252	futex_up(&vfs_phone_futex);	252	futex_up(&vfs_phone_futex);
253	if (rc == EOK)	253	if (rc == EOK)
254	return (ssize_t) IPC_GET_ARG1(answer);	254	return (ssize_t) IPC_GET_ARG1(answer);
255	else	255	else
256	return -1;	256	return -1;
257	}	257	}
258		258
259	ssize_t write(int fildes, const void *buf, size_t nbyte)	259	ssize_t write(int fildes, const void *buf, size_t nbyte)
260	{	260	{
261	int res;	261	int res;
262	ipcarg_t rc;	262	ipcarg_t rc;
263	ipc_call_t answer;	263	ipc_call_t answer;
264	aid_t req;	264	aid_t req;
265		265
266	futex_down(&vfs_phone_futex);	266	futex_down(&vfs_phone_futex);
267	async_serialize_start();	267	async_serialize_start();
268	if (vfs_phone < 0) {	268	if (vfs_phone < 0) {
269	res = vfs_connect();	269	res = vfs_connect();
270	if (res < 0) {	270	if (res < 0) {
271	async_serialize_end();	271	async_serialize_end();
272	futex_up(&vfs_phone_futex);	272	futex_up(&vfs_phone_futex);
273	return res;	273	return res;
274	}	274	}
275	}	275	}
276	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	276	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
277	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	277	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
278	if (rc != EOK) {	278	if (rc != EOK) {
279	async_wait_for(req, NULL);	279	async_wait_for(req, NULL);
280	async_serialize_end();	280	async_serialize_end();
281	futex_up(&vfs_phone_futex);	281	futex_up(&vfs_phone_futex);
282	return (ssize_t) rc;	282	return (ssize_t) rc;
283	}	283	}
284	async_wait_for(req, &rc);	284	async_wait_for(req, &rc);
285	async_serialize_end();	285	async_serialize_end();
286	futex_up(&vfs_phone_futex);	286	futex_up(&vfs_phone_futex);
287	if (rc == EOK)	287	if (rc == EOK)
288	return (ssize_t) IPC_GET_ARG1(answer);	288	return (ssize_t) IPC_GET_ARG1(answer);
289	else	289	else
290	return -1;	290	return -1;
291	}	291	}
292		292
293	off_t lseek(int fildes, off_t offset, int whence)	293	off_t lseek(int fildes, off_t offset, int whence)
294	{	294	{
295	int res;	295	int res;
296	ipcarg_t rc;	296	ipcarg_t rc;
297		297
298	futex_down(&vfs_phone_futex);	298	futex_down(&vfs_phone_futex);
299	async_serialize_start();	299	async_serialize_start();
300	if (vfs_phone < 0) {	300	if (vfs_phone < 0) {
301	res = vfs_connect();	301	res = vfs_connect();
302	if (res < 0) {	302	if (res < 0) {
303	async_serialize_end();	303	async_serialize_end();
304	futex_up(&vfs_phone_futex);	304	futex_up(&vfs_phone_futex);
305	return res;	305	return res;
306	}	306	}
307	}	307	}
308		308
309	off_t newoffs;	309	off_t newoffs;
310	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	310	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
311	(ipcarg_t)&newoffs);	311	(ipcarg_t)&newoffs);
312		312
313	async_serialize_end();	313	async_serialize_end();
314	futex_up(&vfs_phone_futex);	314	futex_up(&vfs_phone_futex);
315		315
316	if (rc != EOK)	316	if (rc != EOK)
317	return (off_t) -1;	317	return (off_t) -1;
318		318
319	return newoffs;	319	return newoffs;
320	}	320	}
321		321
322	int ftruncate(int fildes, off_t length)	322	int ftruncate(int fildes, off_t length)
323	{	323	{
324	int res;	324	int res;
325	ipcarg_t rc;	325	ipcarg_t rc;
326		326
327	futex_down(&vfs_phone_futex);	327	futex_down(&vfs_phone_futex);
328	async_serialize_start();	328	async_serialize_start();
329	if (vfs_phone < 0) {	329	if (vfs_phone < 0) {
330	res = vfs_connect();	330	res = vfs_connect();
331	if (res < 0) {	331	if (res < 0) {
332	async_serialize_end();	332	async_serialize_end();
333	futex_up(&vfs_phone_futex);	333	futex_up(&vfs_phone_futex);
334	return res;	334	return res;
335	}	335	}
336	}	336	}
337	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	337	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
338	async_serialize_end();	338	async_serialize_end();
339	futex_up(&vfs_phone_futex);	339	futex_up(&vfs_phone_futex);
340	return (int) rc;	340	return (int) rc;
341	}	341	}
342		342
343	DIR opendir(const char dirname)	343	DIR opendir(const char dirname)
344	{	344	{
345	DIR *dirp = malloc(sizeof(DIR));	345	DIR *dirp = malloc(sizeof(DIR));
346	if (!dirp)	346	if (!dirp)
347	return NULL;	347	return NULL;
348	dirp->fd = _open(dirname, L_DIRECTORY, 0);	348	dirp->fd = _open(dirname, L_DIRECTORY, 0);
349	if (dirp->fd < 0) {	349	if (dirp->fd < 0) {
350	free(dirp);	350	free(dirp);
351	return NULL;	351	return NULL;
352	}	352	}
353	return dirp;	353	return dirp;
354	}	354	}
355		355
356	struct dirent readdir(DIR dirp)	356	struct dirent readdir(DIR dirp)
357	{	357	{
358	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	358	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
359	if (len <= 0)	359	if (len <= 0)
360	return NULL;	360	return NULL;
361	return &dirp->res;	361	return &dirp->res;
362	}	362	}
363		363
364	void rewinddir(DIR *dirp)	364	void rewinddir(DIR *dirp)
365	{	365	{
366	(void) lseek(dirp->fd, 0, SEEK_SET);	366	(void) lseek(dirp->fd, 0, SEEK_SET);
367	}	367	}
368		368
369	int closedir(DIR *dirp)	369	int closedir(DIR *dirp)
370	{	370	{
371	(void) close(dirp->fd);	371	(void) close(dirp->fd);
372	free(dirp);	372	free(dirp);
373	return 0;	373	return 0;
374	}	374	}
375		375
376	int mkdir(const char *path, mode_t mode)	376	int mkdir(const char *path, mode_t mode)
377	{	377	{
378	int res;	378	int res;
379	ipcarg_t rc;	379	ipcarg_t rc;
380	aid_t req;	380	aid_t req;
381		381
382	char *pa = absolutize(path);	382	char *pa = absolutize(path);
383	if (!pa)	383	if (!pa)
384	return ENOMEM;	384	return ENOMEM;
385	size_t pc_len;	385	size_t pc_len;
386	char *pc = canonify(pa, &pc_len);	386	char *pc = canonify(pa, &pc_len);
387	if (!pc) {	387	if (!pc) {
388	free(pa);	388	free(pa);
389	return EINVAL;	389	return EINVAL;
390	}	390	}
391		391
392	futex_down(&vfs_phone_futex);	392	futex_down(&vfs_phone_futex);
393	async_serialize_start();	393	async_serialize_start();
394	if (vfs_phone < 0) {	394	if (vfs_phone < 0) {
395	res = vfs_connect();	395	res = vfs_connect();
396	if (res < 0) {	396	if (res < 0) {
397	async_serialize_end();	397	async_serialize_end();
398	futex_up(&vfs_phone_futex);	398	futex_up(&vfs_phone_futex);
399	free(pa);	399	free(pa);
400	return res;	400	return res;
401	}	401	}
402	}	402	}
403	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	403	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
404	rc = ipc_data_write_start(vfs_phone, pc, pc_len);	404	rc = ipc_data_write_start(vfs_phone, pc, pc_len);
405	if (rc != EOK) {	405	if (rc != EOK) {
406	async_wait_for(req, NULL);	406	async_wait_for(req, NULL);
407	async_serialize_end();	407	async_serialize_end();
408	futex_up(&vfs_phone_futex);	408	futex_up(&vfs_phone_futex);
409	free(pa);	409	free(pa);
410	return (int) rc;	410	return (int) rc;
411	}	411	}
412	async_wait_for(req, &rc);	412	async_wait_for(req, &rc);
413	async_serialize_end();	413	async_serialize_end();
414	futex_up(&vfs_phone_futex);	414	futex_up(&vfs_phone_futex);
415	free(pa);	415	free(pa);
416	return rc;	416	return rc;
417	}	417	}
418		418
419	static int _unlink(const char *path, int lflag)	419	static int _unlink(const char *path, int lflag)
420	{	420	{
421	int res;	421	int res;
422	ipcarg_t rc;	422	ipcarg_t rc;
423	aid_t req;	423	aid_t req;
424		424
425	char *pa = absolutize(path);	425	char *pa = absolutize(path);
426	if (!pa)	426	if (!pa)
427	return ENOMEM;	427	return ENOMEM;
428	size_t pc_len;	428	size_t pc_len;
429	char *pc = canonify(pa, &pc_len);	429	char *pc = canonify(pa, &pc_len);
430	if (!pc) {	430	if (!pc) {
431	free(pa);	431	free(pa);
432	return EINVAL;	432	return EINVAL;
433	}	433	}
434	futex_down(&vfs_phone_futex);	434	futex_down(&vfs_phone_futex);
435	async_serialize_start();	435	async_serialize_start();
436	if (vfs_phone < 0) {	436	if (vfs_phone < 0) {
437	res = vfs_connect();	437	res = vfs_connect();
438	if (res < 0) {	438	if (res < 0) {
439	async_serialize_end();	439	async_serialize_end();
440	futex_up(&vfs_phone_futex);	440	futex_up(&vfs_phone_futex);
441	free(pa);	441	free(pa);
442	return res;	442	return res;
443	}	443	}
444	}	444	}
445	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	445	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
446	rc = ipc_data_write_start(vfs_phone, pc, pc_len);	446	rc = ipc_data_write_start(vfs_phone, pc, pc_len);
447	if (rc != EOK) {	447	if (rc != EOK) {
448	async_wait_for(req, NULL);	448	async_wait_for(req, NULL);
449	async_serialize_end();	449	async_serialize_end();
450	futex_up(&vfs_phone_futex);	450	futex_up(&vfs_phone_futex);
451	free(pa);	451	free(pa);
452	return (int) rc;	452	return (int) rc;
453	}	453	}
454	async_wait_for(req, &rc);	454	async_wait_for(req, &rc);
455	async_serialize_end();	455	async_serialize_end();
456	futex_up(&vfs_phone_futex);	456	futex_up(&vfs_phone_futex);
457	free(pa);	457	free(pa);
458	return rc;	458	return rc;
459	}	459	}
460		460
461	int unlink(const char *path)	461	int unlink(const char *path)
462	{	462	{
463	return _unlink(path, L_NONE);	463	return _unlink(path, L_NONE);
464	}	464	}
465		465
466	int rmdir(const char *path)	466	int rmdir(const char *path)
467	{	467	{
468	return _unlink(path, L_DIRECTORY);	468	return _unlink(path, L_DIRECTORY);
469	}	469	}
470		470
-		471	int rename(const char old, const char new)
-		472	{
-		473	int res;
-		474	ipcarg_t rc;
-		475	aid_t req;
-		476
-		477	char *olda = absolutize(old);
-		478	if (!olda)
-		479	return ENOMEM;
-		480	size_t oldc_len;
-		481	char *oldc = canonify(olda, &oldc_len);
-		482	if (!oldc) {
-		483	free(olda);
-		484	return EINVAL;
-		485	}
-		486	char *newa = absolutize(new);
-		487	if (!newa) {
-		488	free(olda);
-		489	return ENOMEM;
-		490	}
-		491	size_t newc_len;
-		492	char *newc = canonify(newa, &newc_len);
-		493	if (!newc) {
-		494	free(olda);
-		495	free(newa);
-		496	return EINVAL;
-		497	}
-		498
-		499	futex_down(&vfs_phone_futex);
-		500	async_serialize_start();

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c – Rev 2761 → 2763