2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
20 #include <sys/types.h>
21 #include <linux/types.h>
23 #include <asm/getopt.h>
24 #include <asm/sections.h>
25 #include <asm/state.h>
28 /* Operating System Interface */
31 size_t length; /* number of bytes in the block */
34 ssize_t os_read(int fd, void *buf, size_t count)
36 return read(fd, buf, count);
39 ssize_t os_read_no_block(int fd, void *buf, size_t count)
41 const int flags = fcntl(fd, F_GETFL, 0);
43 fcntl(fd, F_SETFL, flags | O_NONBLOCK);
44 return os_read(fd, buf, count);
47 ssize_t os_write(int fd, const void *buf, size_t count)
49 return write(fd, buf, count);
52 off_t os_lseek(int fd, off_t offset, int whence)
54 if (whence == OS_SEEK_SET)
56 else if (whence == OS_SEEK_CUR)
58 else if (whence == OS_SEEK_END)
62 return lseek(fd, offset, whence);
65 int os_open(const char *pathname, int os_flags)
69 switch (os_flags & OS_O_MASK) {
84 if (os_flags & OS_O_CREAT)
87 return open(pathname, flags, 0777);
95 void os_exit(int exit_code)
100 /* Restore tty state when we exit */
101 static struct termios orig_term;
103 static void os_fd_restore(void)
105 tcsetattr(0, TCSANOW, &orig_term);
108 /* Put tty into raw mode so <tab> and <ctrl+c> work */
109 void os_tty_raw(int fd)
111 static int setup = 0;
118 /* If not a tty, don't complain */
119 if (tcgetattr(fd, &orig_term))
123 term.c_iflag = IGNBRK | IGNPAR;
124 term.c_oflag = OPOST | ONLCR;
125 term.c_cflag = CS8 | CREAD | CLOCAL;
127 if (tcsetattr(fd, TCSANOW, &term))
130 atexit(os_fd_restore);
133 void *os_malloc(size_t length)
135 struct os_mem_hdr *hdr;
137 hdr = mmap(NULL, length + sizeof(*hdr), PROT_READ | PROT_WRITE,
138 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
139 if (hdr == MAP_FAILED)
141 hdr->length = length;
146 void *os_free(void *ptr)
148 struct os_mem_hdr *hdr = ptr;
152 munmap(hdr, hdr->length + sizeof(*hdr));
155 void *os_realloc(void *ptr, size_t length)
157 struct os_mem_hdr *hdr = ptr;
162 buf = os_malloc(length);
166 if (length > hdr->length)
167 length = hdr->length;
168 memcpy(buf, ptr, length);
176 void os_usleep(unsigned long usec)
181 uint64_t __attribute__((no_instrument_function)) os_get_nsec(void)
183 #if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
185 if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
188 gettimeofday(&tv, NULL);
189 tp.tv_sec = tv.tv_sec;
190 tp.tv_nsec = tv.tv_usec * 1000;
192 return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
195 gettimeofday(&tv, NULL);
196 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
200 static char *short_opts;
201 static struct option *long_opts;
203 int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
205 struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
206 size_t num_options = __u_boot_sandbox_option_count();
209 int hidden_short_opt;
214 if (short_opts || long_opts)
220 /* dynamically construct the arguments to the system getopt_long */
221 short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1);
222 long_opts = os_malloc(sizeof(*long_opts) * num_options);
223 if (!short_opts || !long_opts)
227 * getopt_long requires "val" to be unique (since that is what the
228 * func returns), so generate unique values automatically for flags
229 * that don't have a short option. pick 0x100 as that is above the
230 * single byte range (where ASCII/ISO-XXXX-X charsets live).
232 hidden_short_opt = 0x100;
234 for (i = 0; i < num_options; ++i) {
235 long_opts[i].name = sb_opt[i]->flag;
236 long_opts[i].has_arg = sb_opt[i]->has_arg ?
237 required_argument : no_argument;
238 long_opts[i].flag = NULL;
240 if (sb_opt[i]->flag_short) {
241 short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short;
242 if (long_opts[i].has_arg == required_argument)
243 short_opts[si++] = ':';
245 long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++;
247 short_opts[si] = '\0';
249 /* we need to handle output ourselves since u-boot provides printf */
253 * walk all of the options the user gave us on the command line,
254 * figure out what u-boot option structure they belong to (via
255 * the unique short val key), and call the appropriate callback.
257 while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
258 for (i = 0; i < num_options; ++i) {
259 if (sb_opt[i]->flag_short == c) {
260 if (sb_opt[i]->callback(state, optarg)) {
261 state->parse_err = sb_opt[i]->flag;
267 if (i == num_options) {
269 * store the faulting flag for later display. we have to
270 * store the flag itself as the getopt parsing itself is
271 * tricky: need to handle the following flags (assume all
272 * of the below are unknown):
273 * -a optopt='a' optind=<next>
274 * -abbbb optopt='a' optind=<this>
275 * -aaaaa optopt='a' optind=<this>
276 * --a optopt=0 optind=<this>
277 * as you can see, it is impossible to determine the exact
278 * faulting flag without doing the parsing ourselves, so
279 * we just report the specific flag that failed.
282 static char parse_err[3] = { '-', 0, '\0', };
283 parse_err[1] = optopt;
284 state->parse_err = parse_err;
286 state->parse_err = argv[optind - 1];
294 void os_dirent_free(struct os_dirent_node *node)
296 struct os_dirent_node *next;
305 int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
307 struct dirent entry, *result;
308 struct os_dirent_node *head, *node, *next;
316 dir = opendir(dirname);
320 /* Create a buffer for the maximum filename length */
321 len = sizeof(entry.d_name) + strlen(dirname) + 2;
328 for (node = head = NULL;; node = next) {
329 ret = readdir_r(dir, &entry, &result);
332 next = malloc(sizeof(*node) + strlen(entry.d_name) + 1);
334 os_dirent_free(head);
338 strcpy(next->name, entry.d_name);
339 switch (entry.d_type) {
341 next->type = OS_FILET_REG;
344 next->type = OS_FILET_DIR;
347 next->type = OS_FILET_LNK;
351 snprintf(fname, len, "%s/%s", dirname, next->name);
352 if (!stat(fname, &buf))
353 next->size = buf.st_size;
366 const char *os_dirent_typename[OS_FILET_COUNT] = {
373 const char *os_dirent_get_typename(enum os_dirent_t type)
375 if (type >= 0 && type < OS_FILET_COUNT)
376 return os_dirent_typename[type];
378 return os_dirent_typename[OS_FILET_UNKNOWN];
381 ssize_t os_get_filesize(const char *fname)
386 ret = stat(fname, &buf);
397 void os_puts(const char *str)
403 int os_write_ram_buf(const char *fname)
405 struct sandbox_state *state = state_get_current();
408 fd = open(fname, O_CREAT | O_WRONLY, 0777);
411 ret = write(fd, state->ram_buf, state->ram_size);
413 if (ret != state->ram_size)
419 int os_read_ram_buf(const char *fname)
421 struct sandbox_state *state = state_get_current();
425 size = os_get_filesize(fname);
428 if (size != state->ram_size)
430 fd = open(fname, O_RDONLY);
434 ret = read(fd, state->ram_buf, state->ram_size);
436 if (ret != state->ram_size)