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 #define CMD_BUF_LEN 4096
17 static char cmdbuf[CMD_BUF_LEN];
18 static int cmdbuf_pos = 0;
19 static const char *ps2 = NULL;
20
21 static void *edit_cb_ctx;
22 static void (*edit_cmd_cb)(void *ctx, char *cmd);
23 static void (*edit_eof_cb)(void *ctx);
24
25
edit_read_char(int sock,void * eloop_ctx,void * sock_ctx)26 static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx)
27 {
28 int c;
29 unsigned char buf[1];
30 int res;
31
32 res = read(sock, buf, 1);
33 if (res < 0)
34 perror("read");
35 if (res <= 0) {
36 edit_eof_cb(edit_cb_ctx);
37 return;
38 }
39 c = buf[0];
40
41 if (c == '\r' || c == '\n') {
42 cmdbuf[cmdbuf_pos] = '\0';
43 cmdbuf_pos = 0;
44 edit_cmd_cb(edit_cb_ctx, cmdbuf);
45 printf("%s> ", ps2 ? ps2 : "");
46 fflush(stdout);
47 return;
48 }
49
50 if (c == '\b') {
51 if (cmdbuf_pos > 0)
52 cmdbuf_pos--;
53 return;
54 }
55
56 if (c >= 32 && c <= 255) {
57 if (cmdbuf_pos < (int) sizeof(cmdbuf) - 1) {
58 cmdbuf[cmdbuf_pos++] = c;
59 }
60 }
61 }
62
63
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)64 int edit_init(void (*cmd_cb)(void *ctx, char *cmd),
65 void (*eof_cb)(void *ctx),
66 char ** (*completion_cb)(void *ctx, const char *cmd, int pos),
67 void *ctx, const char *history_file, const char *ps)
68 {
69 edit_cb_ctx = ctx;
70 edit_cmd_cb = cmd_cb;
71 edit_eof_cb = eof_cb;
72 eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL);
73 ps2 = ps;
74
75 printf("%s> ", ps2 ? ps2 : "");
76 fflush(stdout);
77
78 return 0;
79 }
80
81
edit_deinit(const char * history_file,int (* filter_cb)(void * ctx,const char * cmd))82 void edit_deinit(const char *history_file,
83 int (*filter_cb)(void *ctx, const char *cmd))
84 {
85 eloop_unregister_read_sock(STDIN_FILENO);
86 }
87
88
edit_clear_line(void)89 void edit_clear_line(void)
90 {
91 }
92
93
edit_redraw(void)94 void edit_redraw(void)
95 {
96 cmdbuf[cmdbuf_pos] = '\0';
97 printf("\r> %s", cmdbuf);
98 }
99