1 /*
2 * Minimal command line editing
3 * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "eloop.h"
13 #include "edit.h"
14
15
16 #ifdef __ZEPHYR__
17 #define STDIN_FILENO 1
18 #endif
19 #define CMD_BUF_LEN 4096
20 static char cmdbuf[CMD_BUF_LEN];
21 static int cmdbuf_pos = 0;
22 static const char *ps2 = NULL;
23
24 static void *edit_cb_ctx;
25 static void (*edit_cmd_cb)(void *ctx, char *cmd);
26 static void (*edit_eof_cb)(void *ctx);
27
28
edit_read_char(int sock,void * eloop_ctx,void * sock_ctx)29 static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx)
30 {
31 int c;
32 unsigned char buf[1];
33 int res;
34
35 res = read(sock, buf, 1);
36 if (res < 0)
37 perror("read");
38 if (res <= 0) {
39 edit_eof_cb(edit_cb_ctx);
40 return;
41 }
42 c = buf[0];
43
44 if (c == '\r' || c == '\n') {
45 cmdbuf[cmdbuf_pos] = '\0';
46 cmdbuf_pos = 0;
47 edit_cmd_cb(edit_cb_ctx, cmdbuf);
48 printf("%s> ", ps2 ? ps2 : "");
49 fflush(stdout);
50 return;
51 }
52
53 if (c == '\b') {
54 if (cmdbuf_pos > 0)
55 cmdbuf_pos--;
56 return;
57 }
58
59 if (c >= 32 && c <= 255) {
60 if (cmdbuf_pos < (int) sizeof(cmdbuf) - 1) {
61 cmdbuf[cmdbuf_pos++] = c;
62 }
63 }
64 }
65
66
edit_init(void (* cmd_cb)(void * ctx,char * cmd),void (* eof_cb)(void * ctx),char ** (* completion_cb)(void * ctx,const char * cmd,int pos),void * ctx,const char * history_file,const char * ps)67 int edit_init(void (*cmd_cb)(void *ctx, char *cmd),
68 void (*eof_cb)(void *ctx),
69 char ** (*completion_cb)(void *ctx, const char *cmd, int pos),
70 void *ctx, const char *history_file, const char *ps)
71 {
72 edit_cb_ctx = ctx;
73 edit_cmd_cb = cmd_cb;
74 edit_eof_cb = eof_cb;
75 eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);
76 ps2 = ps;
77
78 printf("%s> ", ps2 ? ps2 : "");
79 fflush(stdout);
80
81 return 0;
82 }
83
84
edit_deinit(const char * history_file,int (* filter_cb)(void * ctx,const char * cmd))85 void edit_deinit(const char *history_file,
86 int (*filter_cb)(void *ctx, const char *cmd))
87 {
88 eloop_unregister_read_sock(STDIN_FILENO);
89 }
90
91
edit_clear_line(void)92 void edit_clear_line(void)
93 {
94 }
95
96
edit_redraw(void)97 void edit_redraw(void)
98 {
99 cmdbuf[cmdbuf_pos] = '\0';
100 printf("\r> %s", cmdbuf);
101 }
102
