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775e241e TT |
1 | /* Standard include files. stdio.h is required. */ |
2 | #include <stdlib.h> | |
3 | #include <unistd.h> | |
4 | #include <string.h> | |
5 | #include <locale.h> | |
6 | ||
7 | /* Used for select(2) */ | |
8 | #include <sys/types.h> | |
9 | #include <sys/select.h> | |
10 | ||
11 | #include <signal.h> | |
12 | ||
13 | #include <errno.h> | |
14 | #include <stdio.h> | |
15 | ||
16 | /* Standard readline include files. */ | |
17 | #if defined (READLINE_LIBRARY) | |
18 | # include "readline.h" | |
19 | # include "history.h" | |
20 | #else | |
21 | # include <readline/readline.h> | |
22 | # include <readline/history.h> | |
23 | #endif | |
24 | ||
25 | extern int errno; | |
26 | ||
27 | static void cb_linehandler (char *); | |
28 | static void signandler (int); | |
29 | ||
30 | int running, sigwinch_received; | |
31 | const char *prompt = "rltest$ "; | |
32 | ||
33 | /* Handle SIGWINCH and window size changes when readline is not active and | |
34 | reading a character. */ | |
35 | static void | |
36 | sighandler (int sig) | |
37 | { | |
38 | sigwinch_received = 1; | |
39 | } | |
40 | ||
41 | /* Callback function called for each line when accept-line executed, EOF | |
42 | seen, or EOF character read. This sets a flag and returns; it could | |
43 | also call exit(3). */ | |
44 | static void | |
45 | cb_linehandler (char *line) | |
46 | { | |
47 | /* Can use ^D (stty eof) or `exit' to exit. */ | |
48 | if (line == NULL || strcmp (line, "exit") == 0) | |
49 | { | |
50 | if (line == 0) | |
51 | printf ("\n"); | |
52 | printf ("exit\n"); | |
53 | /* This function needs to be called to reset the terminal settings, | |
54 | and calling it from the line handler keeps one extra prompt from | |
55 | being displayed. */ | |
56 | rl_callback_handler_remove (); | |
57 | ||
58 | running = 0; | |
59 | } | |
60 | else | |
61 | { | |
62 | if (*line) | |
63 | add_history (line); | |
64 | printf ("input line: %s\n", line); | |
65 | free (line); | |
66 | } | |
67 | } | |
68 | ||
69 | int | |
70 | main (int c, char **v) | |
71 | { | |
72 | fd_set fds; | |
73 | int r; | |
74 | ||
75 | ||
76 | setlocale (LC_ALL, ""); | |
77 | ||
78 | /* Handle SIGWINCH */ | |
79 | signal (SIGWINCH, sighandler); | |
80 | ||
81 | /* Install the line handler. */ | |
82 | rl_callback_handler_install (prompt, cb_linehandler); | |
83 | ||
84 | /* Enter a simple event loop. This waits until something is available | |
85 | to read on readline's input stream (defaults to standard input) and | |
86 | calls the builtin character read callback to read it. It does not | |
87 | have to modify the user's terminal settings. */ | |
88 | running = 1; | |
89 | while (running) | |
90 | { | |
91 | FD_ZERO (&fds); | |
92 | FD_SET (fileno (rl_instream), &fds); | |
93 | ||
94 | r = select (FD_SETSIZE, &fds, NULL, NULL, NULL); | |
95 | if (r < 0 && errno != EINTR) | |
96 | { | |
97 | perror ("rltest: select"); | |
98 | rl_callback_handler_remove (); | |
99 | break; | |
100 | } | |
101 | if (sigwinch_received) | |
102 | { | |
103 | rl_resize_terminal (); | |
104 | sigwinch_received = 0; | |
105 | } | |
106 | if (r < 0) | |
107 | continue; | |
108 | ||
109 | if (FD_ISSET (fileno (rl_instream), &fds)) | |
110 | rl_callback_read_char (); | |
111 | } | |
112 | ||
113 | printf ("rltest: Event loop has exited\n"); | |
114 | return 0; | |
115 | } |