2 * Copyright (c) 2011 The Chromium OS Authors.
3 * See file CREDITS for list of people who contributed to this
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include <sys/types.h>
33 #include <linux/types.h>
35 #include <asm/getopt.h>
36 #include <asm/sections.h>
37 #include <asm/state.h>
40 /* Operating System Interface */
42 ssize_t os_read(int fd, void *buf, size_t count)
44 return read(fd, buf, count);
47 ssize_t os_read_no_block(int fd, void *buf, size_t count)
49 const int flags = fcntl(fd, F_GETFL, 0);
51 fcntl(fd, F_SETFL, flags | O_NONBLOCK);
52 return os_read(fd, buf, count);
55 ssize_t os_write(int fd, const void *buf, size_t count)
57 return write(fd, buf, count);
60 off_t os_lseek(int fd, off_t offset, int whence)
62 if (whence == OS_SEEK_SET)
64 else if (whence == OS_SEEK_CUR)
66 else if (whence == OS_SEEK_END)
70 return lseek(fd, offset, whence);
73 int os_open(const char *pathname, int os_flags)
77 switch (os_flags & OS_O_MASK) {
92 if (os_flags & OS_O_CREAT)
95 return open(pathname, flags, 0777);
103 void os_exit(int exit_code)
108 /* Restore tty state when we exit */
109 static struct termios orig_term;
111 static void os_fd_restore(void)
113 tcsetattr(0, TCSANOW, &orig_term);
116 /* Put tty into raw mode so <tab> and <ctrl+c> work */
117 void os_tty_raw(int fd)
119 static int setup = 0;
126 /* If not a tty, don't complain */
127 if (tcgetattr(fd, &orig_term))
131 term.c_iflag = IGNBRK | IGNPAR;
132 term.c_oflag = OPOST | ONLCR;
133 term.c_cflag = CS8 | CREAD | CLOCAL;
135 if (tcsetattr(fd, TCSANOW, &term))
138 atexit(os_fd_restore);
141 void *os_malloc(size_t length)
143 return mmap(NULL, length, PROT_READ | PROT_WRITE,
144 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
147 void os_usleep(unsigned long usec)
152 u64 os_get_nsec(void)
154 #if defined(CLOCK_MONOTONIC) && defined(_POSIX_MONOTONIC_CLOCK)
156 if (EINVAL == clock_gettime(CLOCK_MONOTONIC, &tp)) {
159 gettimeofday(&tv, NULL);
160 tp.tv_sec = tv.tv_sec;
161 tp.tv_nsec = tv.tv_usec * 1000;
163 return tp.tv_sec * 1000000000ULL + tp.tv_nsec;
166 gettimeofday(&tv, NULL);
167 return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
171 static char *short_opts;
172 static struct option *long_opts;
174 int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
176 struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
177 size_t num_options = __u_boot_sandbox_option_count();
180 int hidden_short_opt;
185 if (short_opts || long_opts)
191 /* dynamically construct the arguments to the system getopt_long */
192 short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1);
193 long_opts = os_malloc(sizeof(*long_opts) * num_options);
194 if (!short_opts || !long_opts)
198 * getopt_long requires "val" to be unique (since that is what the
199 * func returns), so generate unique values automatically for flags
200 * that don't have a short option. pick 0x100 as that is above the
201 * single byte range (where ASCII/ISO-XXXX-X charsets live).
203 hidden_short_opt = 0x100;
205 for (i = 0; i < num_options; ++i) {
206 long_opts[i].name = sb_opt[i]->flag;
207 long_opts[i].has_arg = sb_opt[i]->has_arg ?
208 required_argument : no_argument;
209 long_opts[i].flag = NULL;
211 if (sb_opt[i]->flag_short) {
212 short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short;
213 if (long_opts[i].has_arg == required_argument)
214 short_opts[si++] = ':';
216 long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++;
218 short_opts[si] = '\0';
220 /* we need to handle output ourselves since u-boot provides printf */
224 * walk all of the options the user gave us on the command line,
225 * figure out what u-boot option structure they belong to (via
226 * the unique short val key), and call the appropriate callback.
228 while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
229 for (i = 0; i < num_options; ++i) {
230 if (sb_opt[i]->flag_short == c) {
231 if (sb_opt[i]->callback(state, optarg)) {
232 state->parse_err = sb_opt[i]->flag;
238 if (i == num_options) {
240 * store the faulting flag for later display. we have to
241 * store the flag itself as the getopt parsing itself is
242 * tricky: need to handle the following flags (assume all
243 * of the below are unknown):
244 * -a optopt='a' optind=<next>
245 * -abbbb optopt='a' optind=<this>
246 * -aaaaa optopt='a' optind=<this>
247 * --a optopt=0 optind=<this>
248 * as you can see, it is impossible to determine the exact
249 * faulting flag without doing the parsing ourselves, so
250 * we just report the specific flag that failed.
253 static char parse_err[3] = { '-', 0, '\0', };
254 parse_err[1] = optopt;
255 state->parse_err = parse_err;
257 state->parse_err = argv[optind - 1];