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
34 int hpux_execve(struct pt_regs *regs)
35 {
36 int error;
37 struct filename *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->name,
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
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
110 int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
111 {
112 struct fd arg;
113 struct hpux_dirent __user * lastdirent;
114 struct getdents_callback buf;
115 int error;
116
117 arg = fdget(fd);
118 if (!arg.file)
119 return -EBADF;
120
121 buf.current_dir = dirent;
122 buf.previous = NULL;
123 buf.count = count;
124 buf.error = 0;
125
126 error = vfs_readdir(arg.file, filldir, &buf);
127 if (error >= 0)
128 error = buf.error;
129 lastdirent = buf.previous;
130 if (lastdirent) {
131 if (put_user(arg.file->f_pos, &lastdirent->d_off))
132 error = -EFAULT;
133 else
134 error = count - buf.count;
135 }
136
137 fdput(arg);
138 return error;
139 }
140
141 int hpux_mount(const char *fs, const char *path, int mflag,
142 const char *fstype, const char *dataptr, int datalen)
143 {
144 return -ENOSYS;
145 }
146
147 static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
148 {
149 struct hpux_stat64 tmp;
150
151 /* we probably want a different split here - is hpux 12:20? */
152
153 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
154 return -EOVERFLOW;
155
156 memset(&tmp, 0, sizeof(tmp));
157 tmp.st_dev = new_encode_dev(stat->dev);
158 tmp.st_ino = stat->ino;
159 tmp.st_mode = stat->mode;
160 tmp.st_nlink = stat->nlink;
161 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
162 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
163 tmp.st_rdev = new_encode_dev(stat->rdev);
164 tmp.st_size = stat->size;
165 tmp.st_atime = stat->atime.tv_sec;
166 tmp.st_mtime = stat->mtime.tv_sec;
167 tmp.st_ctime = stat->ctime.tv_sec;
168 tmp.st_blocks = stat->blocks;
169 tmp.st_blksize = stat->blksize;
170 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
171 }
172
173 long hpux_stat64(const char __user *filename, struct hpux_stat64 __user *statbuf)
174 {
175 struct kstat stat;
176 int error = vfs_stat(filename, &stat);
177
178 if (!error)
179 error = cp_hpux_stat(&stat, statbuf);
180
181 return error;
182 }
183
184 long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
185 {
186 struct kstat stat;
187 int error = vfs_fstat(fd, &stat);
188
189 if (!error)
190 error = cp_hpux_stat(&stat, statbuf);
191
192 return error;
193 }
194
195 long hpux_lstat64(const char __user *filename,
196 struct hpux_stat64 __user *statbuf)
197 {
198 struct kstat stat;
199 int error = vfs_lstat(filename, &stat);
200
201 if (!error)
202 error = cp_hpux_stat(&stat, statbuf);
203
204 return error;
205 }
206
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