Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <unistd.h> |
| 8 | #include <errno.h> |
| 9 | #include <fcntl.h> |
| 10 | #include <signal.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <sys/stat.h> |
| 13 | #include <sys/socket.h> |
| 14 | #include <sys/un.h> |
| 15 | #include <sys/ioctl.h> |
| 16 | #include <sys/mount.h> |
| 17 | #include <sys/uio.h> |
| 18 | #include "os.h" |
| 19 | #include "user.h" |
| 20 | #include "kern_util.h" |
| 21 | |
| 22 | static void copy_stat(struct uml_stat *dst, struct stat64 *src) |
| 23 | { |
| 24 | *dst = ((struct uml_stat) { |
| 25 | .ust_dev = src->st_dev, /* device */ |
| 26 | .ust_ino = src->st_ino, /* inode */ |
| 27 | .ust_mode = src->st_mode, /* protection */ |
| 28 | .ust_nlink = src->st_nlink, /* number of hard links */ |
| 29 | .ust_uid = src->st_uid, /* user ID of owner */ |
| 30 | .ust_gid = src->st_gid, /* group ID of owner */ |
| 31 | .ust_size = src->st_size, /* total size, in bytes */ |
| 32 | .ust_blksize = src->st_blksize, /* blocksize for filesys I/O */ |
| 33 | .ust_blocks = src->st_blocks, /* number of blocks allocated */ |
| 34 | .ust_atime = src->st_atime, /* time of last access */ |
| 35 | .ust_mtime = src->st_mtime, /* time of last modification */ |
| 36 | .ust_ctime = src->st_ctime, /* time of last change */ |
| 37 | }); |
| 38 | } |
| 39 | |
| 40 | int os_stat_fd(const int fd, struct uml_stat *ubuf) |
| 41 | { |
| 42 | struct stat64 sbuf; |
| 43 | int err; |
| 44 | |
Jeff Dike | 9ead6fe | 2006-07-10 04:45:15 -0700 | [diff] [blame] | 45 | CATCH_EINTR(err = fstat64(fd, &sbuf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 47 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | if(ubuf != NULL) |
| 50 | copy_stat(ubuf, &sbuf); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 51 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | int os_stat_file(const char *file_name, struct uml_stat *ubuf) |
| 55 | { |
| 56 | struct stat64 sbuf; |
| 57 | int err; |
| 58 | |
| 59 | do { |
| 60 | err = stat64(file_name, &sbuf); |
| 61 | } while((err < 0) && (errno == EINTR)) ; |
| 62 | |
| 63 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 64 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | if(ubuf != NULL) |
| 67 | copy_stat(ubuf, &sbuf); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 68 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | int os_access(const char* file, int mode) |
| 72 | { |
| 73 | int amode, err; |
| 74 | |
| 75 | amode=(mode&OS_ACC_R_OK ? R_OK : 0) | (mode&OS_ACC_W_OK ? W_OK : 0) | |
| 76 | (mode&OS_ACC_X_OK ? X_OK : 0) | (mode&OS_ACC_F_OK ? F_OK : 0) ; |
| 77 | |
| 78 | err = access(file, amode); |
| 79 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 80 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 82 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | /* FIXME? required only by hostaudio (because it passes ioctls verbatim) */ |
| 86 | int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg) |
| 87 | { |
| 88 | int err; |
| 89 | |
| 90 | err = ioctl(fd, cmd, arg); |
| 91 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 92 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 94 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | /* FIXME: ensure namebuf in os_get_if_name is big enough */ |
| 98 | int os_get_ifname(int fd, char* namebuf) |
| 99 | { |
| 100 | if(ioctl(fd, SIOCGIFNAME, namebuf) < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 101 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 103 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | int os_set_slip(int fd) |
| 107 | { |
| 108 | int disc, sencap; |
| 109 | |
| 110 | disc = N_SLIP; |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 111 | if(ioctl(fd, TIOCSETD, &disc) < 0) |
| 112 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | sencap = 0; |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 115 | if(ioctl(fd, SIOCSIFENCAP, &sencap) < 0) |
| 116 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 118 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | int os_set_owner(int fd, int pid) |
| 122 | { |
| 123 | if(fcntl(fd, F_SETOWN, pid) < 0){ |
| 124 | int save_errno = errno; |
| 125 | |
| 126 | if(fcntl(fd, F_GETOWN, 0) != pid) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 127 | return -save_errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | } |
| 129 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 130 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | } |
| 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | int os_mode_fd(int fd, int mode) |
| 134 | { |
| 135 | int err; |
| 136 | |
| 137 | do { |
| 138 | err = fchmod(fd, mode); |
| 139 | } while((err < 0) && (errno==EINTR)) ; |
| 140 | |
| 141 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 142 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 144 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | int os_file_type(char *file) |
| 148 | { |
| 149 | struct uml_stat buf; |
| 150 | int err; |
| 151 | |
| 152 | err = os_stat_file(file, &buf); |
| 153 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 154 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 156 | if(S_ISDIR(buf.ust_mode)) |
| 157 | return OS_TYPE_DIR; |
| 158 | else if(S_ISLNK(buf.ust_mode)) |
| 159 | return OS_TYPE_SYMLINK; |
| 160 | else if(S_ISCHR(buf.ust_mode)) |
| 161 | return OS_TYPE_CHARDEV; |
| 162 | else if(S_ISBLK(buf.ust_mode)) |
| 163 | return OS_TYPE_BLOCKDEV; |
| 164 | else if(S_ISFIFO(buf.ust_mode)) |
| 165 | return OS_TYPE_FIFO; |
| 166 | else if(S_ISSOCK(buf.ust_mode)) |
| 167 | return OS_TYPE_SOCK; |
| 168 | else return OS_TYPE_FILE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | int os_file_mode(char *file, struct openflags *mode_out) |
| 172 | { |
| 173 | int err; |
| 174 | |
| 175 | *mode_out = OPENFLAGS(); |
| 176 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 177 | err = access(file, W_OK); |
| 178 | if(err && (errno != EACCES)) |
| 179 | return -errno; |
| 180 | else if(!err) |
| 181 | *mode_out = of_write(*mode_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 183 | err = access(file, R_OK); |
| 184 | if(err && (errno != EACCES)) |
| 185 | return -errno; |
| 186 | else if(!err) |
| 187 | *mode_out = of_read(*mode_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 189 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | int os_open_file(char *file, struct openflags flags, int mode) |
| 193 | { |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 194 | int fd, err, f = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
| 196 | if(flags.r && flags.w) f = O_RDWR; |
| 197 | else if(flags.r) f = O_RDONLY; |
| 198 | else if(flags.w) f = O_WRONLY; |
| 199 | else f = 0; |
| 200 | |
| 201 | if(flags.s) f |= O_SYNC; |
| 202 | if(flags.c) f |= O_CREAT; |
| 203 | if(flags.t) f |= O_TRUNC; |
| 204 | if(flags.e) f |= O_EXCL; |
| 205 | |
| 206 | fd = open64(file, f, mode); |
| 207 | if(fd < 0) |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 208 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | if(flags.cl && fcntl(fd, F_SETFD, 1)){ |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 211 | err = -errno; |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 212 | close(fd); |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 213 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 216 | return fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | int os_connect_socket(char *name) |
| 220 | { |
| 221 | struct sockaddr_un sock; |
| 222 | int fd, err; |
| 223 | |
| 224 | sock.sun_family = AF_UNIX; |
| 225 | snprintf(sock.sun_path, sizeof(sock.sun_path), "%s", name); |
| 226 | |
| 227 | fd = socket(AF_UNIX, SOCK_STREAM, 0); |
Paolo 'Blaisorblade' Giarrusso | dc1561a | 2006-02-24 13:03:56 -0800 | [diff] [blame] | 228 | if(fd < 0) { |
| 229 | err = -errno; |
| 230 | goto out; |
| 231 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
| 233 | err = connect(fd, (struct sockaddr *) &sock, sizeof(sock)); |
Paolo 'Blaisorblade' Giarrusso | dc1561a | 2006-02-24 13:03:56 -0800 | [diff] [blame] | 234 | if(err) { |
| 235 | err = -errno; |
| 236 | goto out_close; |
| 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Paolo 'Blaisorblade' Giarrusso | dc1561a | 2006-02-24 13:03:56 -0800 | [diff] [blame] | 239 | return fd; |
| 240 | |
| 241 | out_close: |
| 242 | close(fd); |
| 243 | out: |
| 244 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | void os_close_file(int fd) |
| 248 | { |
| 249 | close(fd); |
| 250 | } |
| 251 | |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 252 | int os_seek_file(int fd, unsigned long long offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 254 | unsigned long long actual; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | actual = lseek64(fd, offset, SEEK_SET); |
| 257 | if(actual != offset) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 258 | return -errno; |
| 259 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | int os_read_file(int fd, void *buf, int len) |
| 263 | { |
Jeff Dike | 3d56404 | 2007-05-06 14:51:32 -0700 | [diff] [blame] | 264 | int n = read(fd, buf, len); |
| 265 | |
| 266 | if(n < 0) |
| 267 | return -errno; |
| 268 | return n; |
| 269 | } |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | int os_write_file(int fd, const void *buf, int len) |
| 272 | { |
Jeff Dike | 3d56404 | 2007-05-06 14:51:32 -0700 | [diff] [blame] | 273 | int n = write(fd, (void *) buf, len); |
| 274 | |
| 275 | if(n < 0) |
| 276 | return -errno; |
| 277 | return n; |
| 278 | } |
| 279 | |
Jeff Dike | da00d9a | 2005-06-08 15:48:01 -0700 | [diff] [blame] | 280 | int os_file_size(char *file, unsigned long long *size_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
| 282 | struct uml_stat buf; |
| 283 | int err; |
| 284 | |
| 285 | err = os_stat_file(file, &buf); |
| 286 | if(err < 0){ |
| 287 | printk("Couldn't stat \"%s\" : err = %d\n", file, -err); |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 288 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | if(S_ISBLK(buf.ust_mode)){ |
Nicolas George | 2c392a4 | 2007-09-18 22:46:21 -0700 | [diff] [blame] | 292 | int fd; |
| 293 | long blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 295 | fd = open(file, O_RDONLY, 0); |
| 296 | if(fd < 0) { |
| 297 | err = -errno; |
| 298 | printk("Couldn't open \"%s\", errno = %d\n", file, |
| 299 | errno); |
| 300 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } |
| 302 | if(ioctl(fd, BLKGETSIZE, &blocks) < 0){ |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 303 | err = -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | printk("Couldn't get the block size of \"%s\", " |
| 305 | "errno = %d\n", file, errno); |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 306 | close(fd); |
| 307 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | *size_out = ((long long) blocks) * 512; |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 310 | close(fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 312 | else *size_out = buf.ust_size; |
| 313 | |
| 314 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | int os_file_modtime(char *file, unsigned long *modtime) |
| 318 | { |
| 319 | struct uml_stat buf; |
| 320 | int err; |
| 321 | |
| 322 | err = os_stat_file(file, &buf); |
| 323 | if(err < 0){ |
| 324 | printk("Couldn't stat \"%s\" : err = %d\n", file, -err); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 325 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | *modtime = buf.ust_mtime; |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 329 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 332 | int os_get_exec_close(int fd, int *close_on_exec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
| 334 | int ret; |
| 335 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 336 | CATCH_EINTR(ret = fcntl(fd, F_GETFD)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | if(ret < 0) |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 339 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 341 | *close_on_exec = (ret & FD_CLOEXEC) ? 1 : 0; |
| 342 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 345 | int os_set_exec_close(int fd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 347 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 349 | CATCH_EINTR(err = fcntl(fd, F_SETFD, FD_CLOEXEC)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
| 351 | if(err < 0) |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 352 | return -errno; |
| 353 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | int os_pipe(int *fds, int stream, int close_on_exec) |
| 357 | { |
| 358 | int err, type = stream ? SOCK_STREAM : SOCK_DGRAM; |
| 359 | |
| 360 | err = socketpair(AF_UNIX, type, 0, fds); |
| 361 | if(err < 0) |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 362 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
| 364 | if(!close_on_exec) |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 365 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 367 | err = os_set_exec_close(fds[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | if(err < 0) |
| 369 | goto error; |
| 370 | |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 371 | err = os_set_exec_close(fds[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | if(err < 0) |
| 373 | goto error; |
| 374 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 375 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | error: |
| 378 | printk("os_pipe : Setting FD_CLOEXEC failed, err = %d\n", -err); |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 379 | close(fds[1]); |
| 380 | close(fds[0]); |
| 381 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | int os_set_fd_async(int fd, int owner) |
| 385 | { |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 386 | int err; |
| 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | /* XXX This should do F_GETFL first */ |
| 389 | if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){ |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 390 | err = -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | printk("os_set_fd_async : failed to set O_ASYNC and " |
| 392 | "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno); |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 393 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | #ifdef notdef |
| 396 | if(fcntl(fd, F_SETFD, 1) < 0){ |
| 397 | printk("os_set_fd_async : Setting FD_CLOEXEC failed, " |
| 398 | "errno = %d\n", errno); |
| 399 | } |
| 400 | #endif |
| 401 | |
| 402 | if((fcntl(fd, F_SETSIG, SIGIO) < 0) || |
| 403 | (fcntl(fd, F_SETOWN, owner) < 0)){ |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 404 | err = -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | printk("os_set_fd_async : Failed to fcntl F_SETOWN " |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 406 | "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | owner, errno); |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 408 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } |
| 410 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 411 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | int os_clear_fd_async(int fd) |
| 415 | { |
| 416 | int flags = fcntl(fd, F_GETFL); |
| 417 | |
| 418 | flags &= ~(O_ASYNC | O_NONBLOCK); |
| 419 | if(fcntl(fd, F_SETFL, flags) < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 420 | return -errno; |
| 421 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | int os_set_fd_block(int fd, int blocking) |
| 425 | { |
| 426 | int flags; |
| 427 | |
| 428 | flags = fcntl(fd, F_GETFL); |
| 429 | |
| 430 | if(blocking) flags &= ~O_NONBLOCK; |
| 431 | else flags |= O_NONBLOCK; |
| 432 | |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 433 | if(fcntl(fd, F_SETFL, flags) < 0) |
| 434 | return -errno; |
| 435 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 436 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | int os_accept_connection(int fd) |
| 440 | { |
| 441 | int new; |
| 442 | |
| 443 | new = accept(fd, NULL, 0); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 444 | if(new < 0) |
| 445 | return -errno; |
| 446 | return new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | #ifndef SHUT_RD |
| 450 | #define SHUT_RD 0 |
| 451 | #endif |
| 452 | |
| 453 | #ifndef SHUT_WR |
| 454 | #define SHUT_WR 1 |
| 455 | #endif |
| 456 | |
| 457 | #ifndef SHUT_RDWR |
| 458 | #define SHUT_RDWR 2 |
| 459 | #endif |
| 460 | |
| 461 | int os_shutdown_socket(int fd, int r, int w) |
| 462 | { |
| 463 | int what, err; |
| 464 | |
| 465 | if(r && w) what = SHUT_RDWR; |
| 466 | else if(r) what = SHUT_RD; |
| 467 | else if(w) what = SHUT_WR; |
| 468 | else { |
| 469 | printk("os_shutdown_socket : neither r or w was set\n"); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 470 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | err = shutdown(fd, what); |
| 473 | if(err < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 474 | return -errno; |
| 475 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | int os_rcv_fd(int fd, int *helper_pid_out) |
| 479 | { |
| 480 | int new, n; |
| 481 | char buf[CMSG_SPACE(sizeof(new))]; |
| 482 | struct msghdr msg; |
| 483 | struct cmsghdr *cmsg; |
| 484 | struct iovec iov; |
| 485 | |
| 486 | msg.msg_name = NULL; |
| 487 | msg.msg_namelen = 0; |
| 488 | iov = ((struct iovec) { .iov_base = helper_pid_out, |
| 489 | .iov_len = sizeof(*helper_pid_out) }); |
| 490 | msg.msg_iov = &iov; |
| 491 | msg.msg_iovlen = 1; |
| 492 | msg.msg_control = buf; |
| 493 | msg.msg_controllen = sizeof(buf); |
| 494 | msg.msg_flags = 0; |
| 495 | |
| 496 | n = recvmsg(fd, &msg, 0); |
| 497 | if(n < 0) |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 498 | return -errno; |
Jeff Dike | d4d5d20 | 2007-11-14 16:58:51 -0800 | [diff] [blame] | 499 | else if(n != iov.iov_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | *helper_pid_out = -1; |
| 501 | |
| 502 | cmsg = CMSG_FIRSTHDR(&msg); |
| 503 | if(cmsg == NULL){ |
| 504 | printk("rcv_fd didn't receive anything, error = %d\n", errno); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 505 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | } |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 507 | if((cmsg->cmsg_level != SOL_SOCKET) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | (cmsg->cmsg_type != SCM_RIGHTS)){ |
| 509 | printk("rcv_fd didn't receive a descriptor\n"); |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 510 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | new = ((int *) CMSG_DATA(cmsg))[0]; |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 514 | return new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | int os_create_unix_socket(char *file, int len, int close_on_exec) |
| 518 | { |
| 519 | struct sockaddr_un addr; |
| 520 | int sock, err; |
| 521 | |
| 522 | sock = socket(PF_UNIX, SOCK_DGRAM, 0); |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 523 | if(sock < 0) |
| 524 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | if(close_on_exec) { |
Jeff Dike | 512b6fb | 2007-10-16 01:27:11 -0700 | [diff] [blame] | 527 | err = os_set_exec_close(sock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | if(err < 0) |
| 529 | printk("create_unix_socket : close_on_exec failed, " |
| 530 | "err = %d", -err); |
| 531 | } |
| 532 | |
| 533 | addr.sun_family = AF_UNIX; |
| 534 | |
| 535 | /* XXX Be more careful about overflow */ |
| 536 | snprintf(addr.sun_path, len, "%s", file); |
| 537 | |
| 538 | err = bind(sock, (struct sockaddr *) &addr, sizeof(addr)); |
Jeff Dike | b4fd310 | 2005-09-16 19:27:49 -0700 | [diff] [blame] | 539 | if(err < 0) |
| 540 | return -errno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 542 | return sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | void os_flush_stdout(void) |
| 546 | { |
| 547 | fflush(stdout); |
| 548 | } |
| 549 | |
| 550 | int os_lock_file(int fd, int excl) |
| 551 | { |
| 552 | int type = excl ? F_WRLCK : F_RDLCK; |
| 553 | struct flock lock = ((struct flock) { .l_type = type, |
| 554 | .l_whence = SEEK_SET, |
| 555 | .l_start = 0, |
| 556 | .l_len = 0 } ); |
| 557 | int err, save; |
| 558 | |
| 559 | err = fcntl(fd, F_SETLK, &lock); |
| 560 | if(!err) |
| 561 | goto out; |
| 562 | |
| 563 | save = -errno; |
| 564 | err = fcntl(fd, F_GETLK, &lock); |
| 565 | if(err){ |
| 566 | err = -errno; |
| 567 | goto out; |
| 568 | } |
| 569 | |
| 570 | printk("F_SETLK failed, file already locked by pid %d\n", lock.l_pid); |
| 571 | err = save; |
| 572 | out: |
Jeff Dike | 108ffa8 | 2006-07-10 04:45:14 -0700 | [diff] [blame] | 573 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |