1 /*
2 * Implements HPUX syscalls.
3 *
4 * Copyright (C) 1999 Matthew Wilcox <willy with parisc-linux.org>
5 * Copyright (C) 2000 Michael Ang <mang with subcarrier.org>
6 * Copyright (C) 2000 John Marvin <jsm with parisc-linux.org>
7 * Copyright (C) 2000 Philipp Rumpf
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/mm.h>
26 #include <linux/fs.h>
27 #include <linux/sched.h>
28 #include <linux/file.h>
29 #include <linux/ptrace.h>
30 #include <linux/slab.h>
31 #include <asm/errno.h>
32 #include <asm/uaccess.h>
33
hpux_execve(struct pt_regs * regs)34 int hpux_execve(struct pt_regs *regs)
35 {
36 int error;
37 char *filename;
38
39 filename = getname((const char __user *) regs->gr[26]);
40 error = PTR_ERR(filename);
41 if (IS_ERR(filename))
42 goto out;
43
44 error = do_execve(filename,
45 (const char __user *const __user *) regs->gr[25],
46 (const char __user *const __user *) regs->gr[24],
47 regs);
48
49 putname(filename);
50
51 out:
52 return error;
53 }
54
55 struct hpux_dirent {
56 loff_t d_off;
57 ino_t d_ino;
58 short d_reclen;
59 short d_namlen;
60 char d_name[1];
61 };
62
63 struct getdents_callback {
64 struct hpux_dirent __user *current_dir;
65 struct hpux_dirent __user *previous;
66 int count;
67 int error;
68 };
69
70 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
71
filldir(void * __buf,const char * name,int namlen,loff_t offset,u64 ino,unsigned d_type)72 static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
73 u64 ino, unsigned d_type)
74 {
75 struct hpux_dirent __user * dirent;
76 struct getdents_callback * buf = (struct getdents_callback *) __buf;
77 ino_t d_ino;
78 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, sizeof(long));
79
80 buf->error = -EINVAL; /* only used if we fail.. */
81 if (reclen > buf->count)
82 return -EINVAL;
83 d_ino = ino;
84 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
85 buf->error = -EOVERFLOW;
86 return -EOVERFLOW;
87 }
88 dirent = buf->previous;
89 if (dirent)
90 if (put_user(offset, &dirent->d_off))
91 goto Efault;
92 dirent = buf->current_dir;
93 if (put_user(d_ino, &dirent->d_ino) ||
94 put_user(reclen, &dirent->d_reclen) ||
95 put_user(namlen, &dirent->d_namlen) ||
96 copy_to_user(dirent->d_name, name, namlen) ||
97 put_user(0, dirent->d_name + namlen))
98 goto Efault;
99 buf->previous = dirent;
100 buf->current_dir = (void __user *)dirent + reclen;
101 buf->count -= reclen;
102 return 0;
103 Efault:
104 buf->error = -EFAULT;
105 return -EFAULT;
106 }
107
108 #undef NAME_OFFSET
109
hpux_getdents(unsigned int fd,struct hpux_dirent __user * dirent,unsigned int count)110 int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
111 {
112 struct file * file;
113 struct hpux_dirent __user * lastdirent;
114 struct getdents_callback buf;
115 int error = -EBADF;
116
117 file = fget(fd);
118 if (!file)
119 goto out;
120
121 buf.current_dir = dirent;
122 buf.previous = NULL;
123 buf.count = count;
124 buf.error = 0;
125
126 error = vfs_readdir(file, filldir, &buf);
127 if (error >= 0)
128 error = buf.error;
129 lastdirent = buf.previous;
130 if (lastdirent) {
131 if (put_user(file->f_pos, &lastdirent->d_off))
132 error = -EFAULT;
133 else
134 error = count - buf.count;
135 }
136
137 fput(file);
138 out:
139 return error;
140 }
141
hpux_mount(const char * fs,const char * path,int mflag,const char * fstype,const char * dataptr,int datalen)142 int hpux_mount(const char *fs, const char *path, int mflag,
143 const char *fstype, const char *dataptr, int datalen)
144 {
145 return -ENOSYS;
146 }
147
cp_hpux_stat(struct kstat * stat,struct hpux_stat64 __user * statbuf)148 static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
149 {
150 struct hpux_stat64 tmp;
151
152 /* we probably want a different split here - is hpux 12:20? */
153
154 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
155 return -EOVERFLOW;
156
157 memset(&tmp, 0, sizeof(tmp));
158 tmp.st_dev = new_encode_dev(stat->dev);
159 tmp.st_ino = stat->ino;
160 tmp.st_mode = stat->mode;
161 tmp.st_nlink = stat->nlink;
162 tmp.st_uid = stat->uid;
163 tmp.st_gid = stat->gid;
164 tmp.st_rdev = new_encode_dev(stat->rdev);
165 tmp.st_size = stat->size;
166 tmp.st_atime = stat->atime.tv_sec;
167 tmp.st_mtime = stat->mtime.tv_sec;
168 tmp.st_ctime = stat->ctime.tv_sec;
169 tmp.st_blocks = stat->blocks;
170 tmp.st_blksize = stat->blksize;
171 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
172 }
173
hpux_stat64(const char __user * filename,struct hpux_stat64 __user * statbuf)174 long hpux_stat64(const char __user *filename, struct hpux_stat64 __user *statbuf)
175 {
176 struct kstat stat;
177 int error = vfs_stat(filename, &stat);
178
179 if (!error)
180 error = cp_hpux_stat(&stat, statbuf);
181
182 return error;
183 }
184
hpux_fstat64(unsigned int fd,struct hpux_stat64 __user * statbuf)185 long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
186 {
187 struct kstat stat;
188 int error = vfs_fstat(fd, &stat);
189
190 if (!error)
191 error = cp_hpux_stat(&stat, statbuf);
192
193 return error;
194 }
195
hpux_lstat64(const char __user * filename,struct hpux_stat64 __user * statbuf)196 long hpux_lstat64(const char __user *filename,
197 struct hpux_stat64 __user *statbuf)
198 {
199 struct kstat stat;
200 int error = vfs_lstat(filename, &stat);
201
202 if (!error)
203 error = cp_hpux_stat(&stat, statbuf);
204
205 return error;
206 }
207