Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
8429d022 MK |
2 | * Copyright (c) 1982, 1986, 1991 Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
8429d022 MK |
5 | * %sccs.include.redist.c% |
6 | * | |
7 | * @(#)kern_subr.c 7.5 (Berkeley) %G% | |
da7c5cc6 | 8 | */ |
358708a6 | 9 | |
94368568 JB |
10 | #include "param.h" |
11 | #include "systm.h" | |
94368568 | 12 | #include "user.h" |
358708a6 | 13 | |
c4ec2128 | 14 | uiomove(cp, n, uio) |
358708a6 SL |
15 | register caddr_t cp; |
16 | register int n; | |
358708a6 SL |
17 | register struct uio *uio; |
18 | { | |
19 | register struct iovec *iov; | |
20 | u_int cnt; | |
21 | int error = 0; | |
22 | ||
c4ec2128 KM |
23 | if (uio->uio_rw != UIO_READ && uio->uio_rw != UIO_WRITE) |
24 | panic("uiomove: mode"); | |
358708a6 SL |
25 | while (n > 0 && uio->uio_resid) { |
26 | iov = uio->uio_iov; | |
27 | cnt = iov->iov_len; | |
28 | if (cnt == 0) { | |
29 | uio->uio_iov++; | |
30 | uio->uio_iovcnt--; | |
31 | continue; | |
32 | } | |
33 | if (cnt > n) | |
34 | cnt = n; | |
35 | switch (uio->uio_segflg) { | |
36 | ||
c41770c0 KM |
37 | case UIO_USERSPACE: |
38 | case UIO_USERISPACE: | |
c4ec2128 | 39 | if (uio->uio_rw == UIO_READ) |
358708a6 SL |
40 | error = copyout(cp, iov->iov_base, cnt); |
41 | else | |
42 | error = copyin(iov->iov_base, cp, cnt); | |
43 | if (error) | |
44 | return (error); | |
45 | break; | |
46 | ||
c41770c0 | 47 | case UIO_SYSSPACE: |
c4ec2128 | 48 | if (uio->uio_rw == UIO_READ) |
358708a6 SL |
49 | bcopy((caddr_t)cp, iov->iov_base, cnt); |
50 | else | |
51 | bcopy(iov->iov_base, (caddr_t)cp, cnt); | |
52 | break; | |
53 | } | |
54 | iov->iov_base += cnt; | |
55 | iov->iov_len -= cnt; | |
56 | uio->uio_resid -= cnt; | |
57 | uio->uio_offset += cnt; | |
58 | cp += cnt; | |
59 | n -= cnt; | |
60 | } | |
61 | return (error); | |
62 | } | |
63 | ||
64 | /* | |
65 | * Give next character to user as result of read. | |
66 | */ | |
67 | ureadc(c, uio) | |
68 | register int c; | |
69 | register struct uio *uio; | |
70 | { | |
71 | register struct iovec *iov; | |
72 | ||
73 | again: | |
74 | if (uio->uio_iovcnt == 0) | |
75 | panic("ureadc"); | |
76 | iov = uio->uio_iov; | |
77 | if (iov->iov_len <= 0 || uio->uio_resid <= 0) { | |
78 | uio->uio_iovcnt--; | |
79 | uio->uio_iov++; | |
80 | goto again; | |
81 | } | |
82 | switch (uio->uio_segflg) { | |
83 | ||
c41770c0 | 84 | case UIO_USERSPACE: |
358708a6 SL |
85 | if (subyte(iov->iov_base, c) < 0) |
86 | return (EFAULT); | |
87 | break; | |
88 | ||
c41770c0 | 89 | case UIO_SYSSPACE: |
358708a6 SL |
90 | *iov->iov_base = c; |
91 | break; | |
92 | ||
c41770c0 | 93 | case UIO_USERISPACE: |
358708a6 SL |
94 | if (suibyte(iov->iov_base, c) < 0) |
95 | return (EFAULT); | |
96 | break; | |
97 | } | |
98 | iov->iov_base++; | |
99 | iov->iov_len--; | |
100 | uio->uio_resid--; | |
101 | uio->uio_offset++; | |
102 | return (0); | |
103 | } | |
104 | ||
514c3fd2 MT |
105 | strcat(src, append) |
106 | register char *src, *append; | |
107 | { | |
108 | ||
109 | for (; *src; ++src) | |
8429d022 | 110 | ; |
514c3fd2 | 111 | while (*src++ = *append++) |
8429d022 | 112 | ; |
514c3fd2 MT |
113 | } |
114 | ||
115 | strcpy(to, from) | |
116 | register char *to, *from; | |
117 | { | |
118 | ||
119 | for (; *from = *to; ++from, ++to) | |
8429d022 | 120 | ; |
514c3fd2 MT |
121 | } |
122 | ||
123 | strncpy(to, from, cnt) | |
124 | register char *to, *from; | |
125 | register int cnt; | |
126 | { | |
127 | ||
128 | for (; cnt && (*to = *from); --cnt, ++from, ++to) | |
8429d022 | 129 | ; |
514c3fd2 MT |
130 | *to = '\0'; |
131 | } | |
132 | ||
8429d022 | 133 | #ifndef lint /* unused except by ct.c, other oddities XXX */ |
358708a6 SL |
134 | /* |
135 | * Get next character written in by user from uio. | |
136 | */ | |
137 | uwritec(uio) | |
138 | struct uio *uio; | |
139 | { | |
140 | register struct iovec *iov; | |
141 | register int c; | |
142 | ||
9b428195 MK |
143 | if (uio->uio_resid <= 0) |
144 | return (-1); | |
358708a6 | 145 | again: |
9b428195 | 146 | if (uio->uio_iovcnt <= 0) |
358708a6 SL |
147 | panic("uwritec"); |
148 | iov = uio->uio_iov; | |
149 | if (iov->iov_len == 0) { | |
358708a6 | 150 | uio->uio_iov++; |
9b428195 MK |
151 | if (--uio->uio_iovcnt == 0) |
152 | return (-1); | |
358708a6 SL |
153 | goto again; |
154 | } | |
155 | switch (uio->uio_segflg) { | |
156 | ||
c41770c0 | 157 | case UIO_USERSPACE: |
358708a6 SL |
158 | c = fubyte(iov->iov_base); |
159 | break; | |
160 | ||
c41770c0 | 161 | case UIO_SYSSPACE: |
8429d022 | 162 | c = *(u_char *) iov->iov_base; |
358708a6 SL |
163 | break; |
164 | ||
c41770c0 | 165 | case UIO_USERISPACE: |
358708a6 SL |
166 | c = fuibyte(iov->iov_base); |
167 | break; | |
168 | } | |
169 | if (c < 0) | |
170 | return (-1); | |
171 | iov->iov_base++; | |
172 | iov->iov_len--; | |
173 | uio->uio_resid--; | |
174 | uio->uio_offset++; | |
8429d022 | 175 | return (c); |
358708a6 | 176 | } |
514c3fd2 | 177 | #endif /* notdef */ |