summary refs log tree commit diff
path: root/gnu/packages/patches/guile-linux-syscalls.patch
blob: 69970a3e60293ecad10838bc4c2ff47068b1bcfa (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
This patch adds bindings to Linux syscalls for which glibc has symbols.

Using the FFI would have been nice, but that's not an option when using
a statically-linked Guile in an initrd that doesn't have libc.so around.

--- guile-2.0.11/libguile/posix.c.orig	2014-02-28 15:01:27.000000000 -0500
+++ guile-2.0.11/libguile/posix.c	2015-06-21 14:28:23.624251038 -0400
@@ -2245,6 +2245,295 @@
 }
 #endif
 
+
+/* Linux! */
+#ifdef __linux__
+
+#include <sys/mount.h>
+#include "libguile/foreign.h"
+#include "libguile/bytevectors.h"
+
+SCM_DEFINE (scm_mount, "mount", 3, 2, 0,
+	    (SCM source, SCM target, SCM type, SCM flags, SCM data),
+	    "Mount file system of @var{type} specified by @var{source} "
+	    "on @var{target}.")
+#define FUNC_NAME s_scm_mount
+{
+  int err;
+  char *c_source, *c_target, *c_type, *c_data;
+  unsigned long c_flags;
+
+  c_source = scm_to_locale_string (source);
+  c_target = scm_to_locale_string (target);
+  c_type = scm_to_locale_string (type);
+  c_flags = SCM_UNBNDP (flags) ? 0 : scm_to_ulong (flags);
+
+  if (SCM_UNBNDP (data) || scm_is_false (data))
+    c_data = NULL;
+  else
+    c_data = scm_to_locale_string (data);
+
+  err = mount (c_source, c_target, c_type, c_flags, c_data);
+  if (err != 0)
+    err = errno;
+
+  free (c_source);
+  free (c_target);
+  free (c_type);
+
+  if (c_data != NULL)
+    free (c_data);
+
+  if (err != 0)
+    {
+      errno = err;
+      SCM_SYSERROR;
+    }
+
+  return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_umount, "umount", 1, 0, 0,
+	    (SCM target),
+	    "Unmount the file system on @var{target}.")
+#define FUNC_NAME s_scm_umount
+{
+  int err;
+  char *c_target;
+
+  c_target = scm_to_locale_string (target);
+
+  err = umount (c_target);
+  if (err != 0)
+    err = errno;
+
+  free (c_target);
+
+  if (err != 0)
+    {
+      errno = err;
+      SCM_SYSERROR;
+    }
+
+  return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* Linux's module installation syscall.  See `kernel/module.c' in Linux;
+   the function itself is part of the GNU libc.
+
+   Load the LEN bytes at MODULE as a kernel module, with arguments from
+   ARGS, a space-separated list of options.  */
+extern long init_module (void *module, unsigned long len, const char *args);
+
+SCM_DEFINE (scm_load_linux_module, "load-linux-module", 1, 1, 0,
+	    (SCM data, SCM options),
+	    "Load the Linux kernel module whose contents are in bytevector "
+	    "DATA (the contents of a @code{.ko} file), with the arguments "
+	    "from the OPTIONS string.")
+#define FUNC_NAME s_scm_load_linux_module
+{
+  long err;
+  void *c_data;
+  unsigned long c_len;
+  char *c_options;
+
+  SCM_VALIDATE_BYTEVECTOR (SCM_ARG1, data);
+
+  c_data = SCM_BYTEVECTOR_CONTENTS (data);
+  c_len = SCM_BYTEVECTOR_LENGTH (data);
+  c_options =
+    scm_to_locale_string (SCM_UNBNDP (options) ? scm_nullstr : options);
+
+  err = init_module (c_data, c_len, c_options);
+
+  free (c_options);
+
+  if (err != 0)
+    SCM_SYSERROR;
+
+  return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* Rebooting, halting, and all that.  */
+
+#include <sys/reboot.h>
+
+SCM_VARIABLE_INIT (flag_RB_AUTOBOOT, "RB_AUTOBOOT",
+		   scm_from_int (RB_AUTOBOOT));
+SCM_VARIABLE_INIT (flag_RB_HALT_SYSTEM, "RB_HALT_SYSTEM",
+		   scm_from_int (RB_HALT_SYSTEM));
+SCM_VARIABLE_INIT (flag_RB_ENABLE_CAD, "RB_ENABLE_CAD",
+		   scm_from_int (RB_ENABLE_CAD));
+SCM_VARIABLE_INIT (flag_RB_DISABLE_CAD, "RB_DISABLE_CAD",
+		   scm_from_int (RB_DISABLE_CAD));
+SCM_VARIABLE_INIT (flag_RB_POWER_OFF, "RB_POWER_OFF",
+		   scm_from_int (RB_POWER_OFF));
+SCM_VARIABLE_INIT (flag_RB_SW_SUSPEND, "RB_SW_SUSPEND",
+		   scm_from_int (RB_SW_SUSPEND));
+SCM_VARIABLE_INIT (flag_RB_KEXEC, "RB_KEXEC",
+		   scm_from_int (RB_KEXEC));
+
+SCM_DEFINE (scm_reboot, "reboot", 0, 1, 0,
+	    (SCM command),
+	    "Reboot the system.  @var{command} must be one of the @code{RB_} "
+	    "constants; if omitted, @var{RB_AUTOBOOT} is used, thus "
+	    "performing a hard reset.")
+#define FUNC_NAME s_scm_reboot
+{
+  int c_command;
+
+  if (SCM_UNBNDP (command))
+    c_command = RB_AUTOBOOT;
+  else
+    c_command = scm_to_int (command);
+
+  reboot (c_command);
+
+  return SCM_UNSPECIFIED;			  /* likely unreached */
+}
+#undef FUNC_NAME
+
+/* Linux network interfaces.  See <linux/if.h>.  */
+
+#include <linux/if.h>
+#include <linux/sockios.h>
+#include "libguile/socket.h"
+
+SCM_VARIABLE_INIT (flag_IFF_UP, "IFF_UP",
+		   scm_from_int (IFF_UP));
+SCM_VARIABLE_INIT (flag_IFF_BROADCAST, "IFF_BROADCAST",
+		   scm_from_int (IFF_BROADCAST));
+SCM_VARIABLE_INIT (flag_IFF_DEBUG, "IFF_DEBUG",
+		   scm_from_int (IFF_DEBUG));
+SCM_VARIABLE_INIT (flag_IFF_LOOPBACK, "IFF_LOOPBACK",
+		   scm_from_int (IFF_LOOPBACK));
+SCM_VARIABLE_INIT (flag_IFF_POINTOPOINT, "IFF_POINTOPOINT",
+		   scm_from_int (IFF_POINTOPOINT));
+SCM_VARIABLE_INIT (flag_IFF_NOTRAILERS, "IFF_NOTRAILERS",
+		   scm_from_int (IFF_NOTRAILERS));
+SCM_VARIABLE_INIT (flag_IFF_RUNNING, "IFF_RUNNING",
+		   scm_from_int (IFF_RUNNING));
+SCM_VARIABLE_INIT (flag_IFF_NOARP, "IFF_NOARP",
+		   scm_from_int (IFF_NOARP));
+SCM_VARIABLE_INIT (flag_IFF_PROMISC, "IFF_PROMISC",
+		   scm_from_int (IFF_PROMISC));
+SCM_VARIABLE_INIT (flag_IFF_ALLMULTI, "IFF_ALLMULTI",
+		   scm_from_int (IFF_ALLMULTI));
+
+SCM_DEFINE (scm_set_network_interface_address, "set-network-interface-address",
+	    3, 0, 0,
+	    (SCM socket, SCM name, SCM address),
+	    "Configure network interface @var{name}.")
+#define FUNC_NAME s_scm_set_network_interface_address
+{
+  char *c_name;
+  struct ifreq ifr;
+  struct sockaddr *c_address;
+  size_t sa_len;
+  int fd, err;
+
+  socket = SCM_COERCE_OUTPORT (socket);
+  SCM_VALIDATE_OPFPORT (1, socket);
+  fd = SCM_FPORT_FDES (socket);
+
+  memset (&ifr, 0, sizeof ifr);
+  c_name = scm_to_locale_string (name);
+  c_address = scm_to_sockaddr (address, &sa_len);
+
+  strncpy (ifr.ifr_name, c_name, sizeof ifr.ifr_name - 1);
+  memcpy (&ifr.ifr_addr, c_address, sa_len);
+
+  err = ioctl (fd, SIOCSIFADDR, &ifr);
+  if (err != 0)
+    err = errno;
+
+  free (c_name);
+  free (c_address);
+
+  if (err != 0)
+    {
+      errno = err;
+      SCM_SYSERROR;
+    }
+
+  return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_set_network_interface_flags, "set-network-interface-flags",
+	    3, 0, 0,
+	    (SCM socket, SCM name, SCM flags),
+	    "Change the flags of network interface @var{name} to "
+	    "@var{flags}.")
+#define FUNC_NAME s_scm_set_network_interface_flags
+{
+  struct ifreq ifr;
+  char *c_name;
+  int fd, err;
+
+  socket = SCM_COERCE_OUTPORT (socket);
+  SCM_VALIDATE_OPFPORT (1, socket);
+  fd = SCM_FPORT_FDES (socket);
+
+  memset (&ifr, 0, sizeof ifr);
+  c_name = scm_to_locale_string (name);
+  strncpy (ifr.ifr_name, c_name, sizeof ifr.ifr_name - 1);
+  ifr.ifr_flags = scm_to_short (flags);
+
+  err = ioctl (fd, SIOCSIFFLAGS, &ifr);
+  if (err != 0)
+    err = errno;
+
+  free (c_name);
+
+  if (err != 0)
+    {
+      errno = err;
+      SCM_SYSERROR;
+    }
+
+  return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_network_interface_flags, "network-interface-flags",
+	    2, 0, 0,
+	    (SCM socket, SCM name),
+	    "Return the flags of network interface @var{name}.")
+#define FUNC_NAME s_scm_network_interface_flags
+{
+  struct ifreq ifr;
+  char *c_name;
+  int fd, err;
+
+  socket = SCM_COERCE_OUTPORT (socket);
+  SCM_VALIDATE_OPFPORT (1, socket);
+  fd = SCM_FPORT_FDES (socket);
+
+  memset (&ifr, 0, sizeof ifr);
+  c_name = scm_to_locale_string (name);
+  strncpy (ifr.ifr_name, c_name, sizeof ifr.ifr_name - 1);
+
+  err = ioctl (fd, SIOCGIFFLAGS, &ifr);
+  if (err != 0)
+    err = errno;
+
+  free (c_name);
+
+  if (err != 0)
+    {
+      errno = err;
+      SCM_SYSERROR;
+    }
+
+  return scm_from_short (ifr.ifr_flags);
+}
+#undef FUNC_NAME
+#endif
+
 void
 scm_init_posix ()
 {