1 /* 2 * Minimal command line editing 3 * Copyright (c) 2010, Jouni Malinen <j (at) 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 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 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 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 89 void edit_clear_line(void) 90 { 91 } 92 93 94 void edit_redraw(void) 95 { 96 cmdbuf[cmdbuf_pos] = '\0'; 97 printf("\r> %s", cmdbuf); 98 } 99
