1 /* 2 * Minimal command line editing 3 * Copyright (c) 2010, Jouni Malinen <j (at) w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #include "includes.h" 16 17 #include "common.h" 18 #include "eloop.h" 19 #include "edit.h" 20 21 22 #define CMD_BUF_LEN 256 23 static char cmdbuf[CMD_BUF_LEN]; 24 static int cmdbuf_pos = 0; 25 26 static void *edit_cb_ctx; 27 static void (*edit_cmd_cb)(void *ctx, char *cmd); 28 static void (*edit_eof_cb)(void *ctx); 29 30 31 static void edit_read_char(int sock, void *eloop_ctx, void *sock_ctx) 32 { 33 int c; 34 unsigned char buf[1]; 35 int res; 36 37 res = read(sock, buf, 1); 38 if (res < 0) 39 perror("read"); 40 if (res <= 0) { 41 edit_eof_cb(edit_cb_ctx); 42 return; 43 } 44 c = buf[0]; 45 46 if (c == '\r' || c == '\n') { 47 cmdbuf[cmdbuf_pos] = '\0'; 48 cmdbuf_pos = 0; 49 edit_cmd_cb(edit_cb_ctx, cmdbuf); 50 printf("> "); 51 fflush(stdout); 52 return; 53 } 54 55 if (c >= 32 && c <= 255) { 56 if (cmdbuf_pos < (int) sizeof(cmdbuf) - 1) { 57 cmdbuf[cmdbuf_pos++] = c; 58 } 59 } 60 } 61 62 63 int edit_init(void (*cmd_cb)(void *ctx, char *cmd), 64 void (*eof_cb)(void *ctx), 65 char ** (*completion_cb)(void *ctx, const char *cmd, int pos), 66 void *ctx, const char *history_file) 67 { 68 edit_cb_ctx = ctx; 69 edit_cmd_cb = cmd_cb; 70 edit_eof_cb = eof_cb; 71 eloop_register_read_sock(STDIN_FILENO, edit_read_char, NULL, NULL); 72 73 printf("> "); 74 fflush(stdout); 75 76 return 0; 77 } 78 79 80 void edit_deinit(const char *history_file, 81 int (*filter_cb)(void *ctx, const char *cmd)) 82 { 83 eloop_unregister_read_sock(STDIN_FILENO); 84 } 85 86 87 void edit_clear_line(void) 88 { 89 } 90 91 92 void edit_redraw(void) 93 { 94 cmdbuf[cmdbuf_pos] = '\0'; 95 printf("\r> %s", cmdbuf); 96 } 97
