1 /*
2 * Copyright (c) 2021 Nordic Semiconductor ASA
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6 #include <zephyr/kernel.h>
7 #include <zephyr/shell/shell.h>
8 #if CONFIG_SHELL_GETOPT
9 #include <zephyr/sys/iterable_sections.h>
10 #endif
11
12 #include <zephyr/sys/sys_getopt.h>
13
14 /* Referring below variables is not thread safe. They reflects getopt state
15 * only when 1 thread is using getopt.
16 * When more threads are using getopt please call getopt_state_get to know
17 * getopt state for the current thread.
18 */
19 int sys_getopt_opterr = 1; /* if error message should be printed */
20 int sys_getopt_optind = 1; /* index into parent argv vector */
21 int sys_getopt_optopt; /* character checked for validity */
22 int sys_getopt_optreset; /* reset getopt */
23 char *sys_getopt_optarg; /* argument associated with option */
24
25 /* Common state for all threads that did not have own getopt state. */
26 static struct sys_getopt_state m_getopt_common_state = {
27 .opterr = 1,
28 .optind = 1,
29 .optopt = 0,
30 .optreset = 0,
31 .optarg = NULL,
32
33 .place = "", /* EMSG */
34
35 #if CONFIG_GETOPT_LONG
36 .nonopt_start = -1, /* first non option argument (for permute) */
37 .nonopt_end = -1, /* first option after non options (for permute) */
38 #endif
39 };
40
41 /* Shim function to update global variables in getopt_shim.c if user wants to
42 * still use the original non-posix compliant getopt. The shim will be deprecated
43 * and eventually removed in the future.
44 */
45 extern void z_getopt_global_state_update_shim(struct sys_getopt_state *state);
46
47 /* This function is not thread safe. All threads using getopt are calling
48 * this function.
49 */
z_getopt_global_state_update(struct sys_getopt_state * state)50 void z_getopt_global_state_update(struct sys_getopt_state *state)
51 {
52 sys_getopt_opterr = state->opterr;
53 sys_getopt_optind = state->optind;
54 sys_getopt_optopt = state->optopt;
55 sys_getopt_optreset = state->optreset;
56 sys_getopt_optarg = state->optarg;
57
58 if (!IS_ENABLED(CONFIG_NATIVE_LIBC) && IS_ENABLED(CONFIG_POSIX_C_LIB_EXT)) {
59 z_getopt_global_state_update_shim(state);
60 }
61 }
62
63 /* It is internal getopt API function, it shall not be called by the user. */
sys_getopt_state_get(void)64 struct sys_getopt_state *sys_getopt_state_get(void)
65 {
66 #if CONFIG_SHELL_GETOPT
67 k_tid_t tid;
68
69 tid = k_current_get();
70 STRUCT_SECTION_FOREACH(shell, sh) {
71 if (tid == sh->ctx->tid) {
72 return &sh->ctx->getopt;
73 }
74 }
75 #endif
76 /* If not a shell thread return a common pointer */
77 return &m_getopt_common_state;
78 }
79
