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959ef981 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2bd0ea18 | 2 | /* |
da23017d NS |
3 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. |
4 | * All Rights Reserved. | |
2bd0ea18 NS |
5 | */ |
6 | ||
6b803e5a | 7 | #include "libxfs.h" |
2bd0ea18 | 8 | #include <signal.h> |
2bd0ea18 | 9 | #include "command.h" |
2bd0ea18 NS |
10 | #include "input.h" |
11 | #include "output.h" | |
12 | #include "sig.h" | |
13 | #include "malloc.h" | |
14 | #include "init.h" | |
15 | ||
bbe12eb9 | 16 | #ifdef ENABLE_EDITLINE |
d4b9ebda | 17 | # include <histedit.h> |
e246ba5f NS |
18 | #endif |
19 | ||
00ff2b10 ES |
20 | static int inputstacksize; |
21 | static FILE **inputstack; | |
22 | static FILE *curinput; | |
2bd0ea18 NS |
23 | |
24 | static void popfile(void); | |
25 | static int source_f(int argc, char **argv); | |
26 | ||
27 | static const cmdinfo_t source_cmd = | |
9ee7055c AM |
28 | { "source", NULL, source_f, 1, 1, 0, N_("source-file"), |
29 | N_("get commands from source-file"), NULL }; | |
2bd0ea18 NS |
30 | |
31 | /* our homegrown strtok that understands strings */ | |
32 | ||
33 | static char * | |
34 | tokenize( | |
35 | char *inp) | |
36 | { | |
37 | static char *last_place = NULL; | |
38 | char *start; | |
39 | char *walk; | |
40 | int in_string = 0; | |
41 | int in_escape = 0; | |
42 | ||
43 | if (inp) { | |
44 | start = inp; | |
45 | } else { | |
46 | if (last_place == NULL) | |
47 | return NULL; | |
48 | ||
49 | /* we're done */ | |
50 | if (*last_place != '\0') | |
51 | return NULL; | |
52 | ||
53 | start = last_place + 1; | |
54 | } | |
55 | last_place = NULL; | |
56 | ||
57 | /* eat whitespace */ | |
58 | while (*start == ' ' || *start == '\t') | |
59 | start++; | |
60 | ||
61 | walk = start; | |
62 | for (;*walk != '\0'; walk++) { | |
63 | if (in_escape) { | |
64 | in_escape = 0; | |
65 | continue; | |
66 | } | |
67 | if (*walk == '\\') | |
68 | in_escape = 1; | |
69 | else if (*walk == '\"') | |
70 | in_string ^= 1; | |
71 | ||
72 | if (!in_string && !in_escape && | |
73 | (*walk == ' ' || *walk == '\t')) { | |
74 | last_place = walk; | |
75 | *last_place = '\0'; | |
76 | break; | |
77 | } | |
78 | } | |
79 | if (walk == start) | |
80 | return NULL; | |
81 | ||
82 | return start; | |
83 | } | |
84 | ||
85 | char ** | |
86 | breakline( | |
87 | char *input, | |
88 | int *count) | |
89 | { | |
90 | int c; | |
91 | char *inp; | |
92 | char *p; | |
93 | char **rval; | |
94 | ||
95 | c = 0; | |
96 | inp = input; | |
97 | rval = xcalloc(sizeof(char *), 1); | |
98 | for (;;) { | |
99 | ||
100 | p = tokenize(inp); | |
101 | ||
102 | if (p == NULL) | |
103 | break; | |
104 | inp = NULL; | |
105 | c++; | |
106 | rval = xrealloc(rval, sizeof(*rval) * (c + 1)); | |
107 | rval[c - 1] = p; | |
108 | rval[c] = NULL; | |
109 | } | |
110 | *count = c; | |
111 | return rval; | |
112 | } | |
113 | ||
114 | void | |
115 | doneline( | |
116 | char *input, | |
117 | char **vec) | |
118 | { | |
119 | xfree(input); | |
120 | xfree(vec); | |
121 | } | |
122 | ||
d4b9ebda NS |
123 | static char * |
124 | get_prompt(void) | |
125 | { | |
126 | static char prompt[FILENAME_MAX + 1]; | |
127 | ||
128 | if (!prompt[0]) | |
129 | snprintf(prompt, sizeof(prompt), "%s> ", progname); | |
130 | return prompt; | |
131 | } | |
132 | ||
e246ba5f NS |
133 | static char * |
134 | fetchline_internal(void) | |
2bd0ea18 NS |
135 | { |
136 | char buf[1024]; | |
137 | int iscont; | |
138 | size_t len; | |
139 | size_t rlen; | |
140 | char *rval; | |
141 | ||
142 | rval = NULL; | |
143 | for (rlen = iscont = 0; ; ) { | |
c8dc4235 | 144 | if (curinput == stdin) { |
2bd0ea18 NS |
145 | if (iscont) |
146 | dbprintf("... "); | |
147 | else | |
d4b9ebda | 148 | dbprintf(get_prompt(), progname); |
2bd0ea18 NS |
149 | fflush(stdin); |
150 | } | |
151 | if (seenint() || | |
152 | (!fgets(buf, sizeof(buf), curinput) && | |
153 | ferror(curinput) && seenint())) { | |
154 | clearint(); | |
155 | dbprintf("^C\n"); | |
156 | clearerr(curinput); | |
157 | if (iscont) { | |
158 | iscont = 0; | |
159 | rlen = 0; | |
160 | if (rval) { | |
161 | xfree(rval); | |
162 | rval = NULL; | |
163 | } | |
164 | } | |
165 | continue; | |
166 | } | |
167 | if (ferror(curinput) || feof(curinput) || | |
168 | (len = strlen(buf)) == 0) { | |
c8dc4235 DW |
169 | /* |
170 | * No more input at this inputstack level; pop | |
171 | * our fd off and return so that a lower | |
172 | * level fetchline can handle us. If this was | |
173 | * an interactive session, print a newline | |
174 | * because ^D doesn't emit one. | |
175 | */ | |
176 | if (curinput == stdin) | |
2bd0ea18 | 177 | dbprintf("\n"); |
c8dc4235 DW |
178 | |
179 | popfile(); | |
2bd0ea18 NS |
180 | iscont = 0; |
181 | rlen = 0; | |
182 | if (rval) { | |
183 | xfree(rval); | |
184 | rval = NULL; | |
185 | } | |
c8dc4235 | 186 | return NULL; |
2bd0ea18 NS |
187 | } |
188 | if (inputstacksize == 1) | |
189 | logprintf("%s", buf); | |
190 | rval = xrealloc(rval, rlen + len + 1); | |
191 | if (rlen == 0) | |
192 | rval[0] = '\0'; | |
193 | rlen += len; | |
194 | strcat(rval, buf); | |
195 | if (buf[len - 1] == '\n') { | |
196 | if (len > 1 && buf[len - 2] == '\\') { | |
197 | rval[rlen - 2] = ' '; | |
198 | rval[rlen - 1] = '\0'; | |
199 | rlen--; | |
200 | iscont = 1; | |
201 | } else { | |
202 | rval[rlen - 1] = '\0'; | |
203 | rlen--; | |
204 | break; | |
205 | } | |
206 | } | |
207 | } | |
208 | return rval; | |
209 | } | |
210 | ||
bbe12eb9 | 211 | #ifdef ENABLE_EDITLINE |
d4b9ebda | 212 | static char *el_get_prompt(EditLine *e) { return get_prompt(); } |
e246ba5f NS |
213 | char * |
214 | fetchline(void) | |
f8149110 | 215 | { |
d4b9ebda NS |
216 | static EditLine *el; |
217 | static History *hist; | |
218 | HistEvent hevent; | |
f8149110 | 219 | char *line; |
d4b9ebda NS |
220 | int count; |
221 | ||
222 | if (!el) { | |
223 | hist = history_init(); | |
224 | history(hist, &hevent, H_SETSIZE, 100); | |
225 | el = el_init(progname, stdin, stdout, stderr); | |
226 | el_source(el, NULL); | |
227 | el_set(el, EL_SIGNAL, 1); | |
228 | el_set(el, EL_PROMPT, el_get_prompt); | |
229 | el_set(el, EL_HIST, history, (const char *)hist); | |
3aef6357 | 230 | el_set(el, EL_EDITOR, "emacs"); |
d4b9ebda NS |
231 | } |
232 | ||
233 | if (inputstacksize == 1) { | |
cafb847b DW |
234 | const char *cmd; |
235 | ||
236 | cmd = el_gets(el, &count); | |
237 | if (!cmd) | |
238 | return NULL; | |
239 | ||
240 | line = xstrdup(cmd); | |
241 | if (!line) | |
242 | return NULL; | |
243 | ||
244 | if (count > 0) | |
245 | line[count-1] = '\0'; | |
246 | if (*line) { | |
247 | history(hist, &hevent, H_ENTER, line); | |
248 | logprintf("%s", line); | |
d4b9ebda NS |
249 | } |
250 | } else { | |
251 | line = fetchline_internal(); | |
252 | } | |
253 | return line; | |
2bd0ea18 | 254 | } |
d4b9ebda NS |
255 | #else |
256 | char * fetchline(void) { return fetchline_internal(); } | |
e246ba5f | 257 | #endif |
2bd0ea18 NS |
258 | |
259 | static void | |
260 | popfile(void) | |
261 | { | |
262 | if (inputstacksize == 0) { | |
263 | curinput = NULL; | |
264 | return; | |
265 | } | |
266 | if (curinput != stdin) | |
267 | fclose(curinput); | |
dfc130f3 | 268 | |
2bd0ea18 | 269 | inputstacksize--; |
dfc130f3 | 270 | if (inputstacksize) { |
2bd0ea18 NS |
271 | inputstack = |
272 | xrealloc(inputstack, inputstacksize * sizeof(*inputstack)); | |
dfc130f3 RC |
273 | curinput = inputstack[inputstacksize - 1]; |
274 | } else { | |
275 | free(inputstack); | |
276 | curinput = NULL; | |
277 | inputstack = NULL; | |
278 | } | |
2bd0ea18 NS |
279 | } |
280 | ||
281 | void | |
282 | pushfile( | |
283 | FILE *file) | |
284 | { | |
285 | inputstack = | |
286 | xrealloc(inputstack, | |
287 | (inputstacksize + 1) * sizeof(*inputstack)); | |
288 | inputstacksize++; | |
289 | curinput = inputstack[inputstacksize - 1] = file; | |
290 | } | |
291 | ||
292 | /* ARGSUSED */ | |
293 | static int | |
294 | source_f( | |
295 | int argc, | |
296 | char **argv) | |
297 | { | |
298 | FILE *f; | |
c8dc4235 DW |
299 | int c, done = 0; |
300 | char *input; | |
301 | char **v; | |
2bd0ea18 NS |
302 | |
303 | f = fopen(argv[1], "r"); | |
c8dc4235 | 304 | if (f == NULL) { |
9ee7055c | 305 | dbprintf(_("can't open %s\n"), argv[0]); |
c8dc4235 DW |
306 | return 0; |
307 | } | |
308 | ||
309 | /* Run the sourced commands now. */ | |
310 | pushfile(f); | |
311 | while (!done) { | |
312 | if ((input = fetchline_internal()) == NULL) | |
313 | break; | |
314 | v = breakline(input, &c); | |
315 | if (c) | |
316 | done = command(c, v); | |
317 | doneline(input, v); | |
318 | } | |
319 | ||
2bd0ea18 NS |
320 | return 0; |
321 | } | |
e246ba5f NS |
322 | |
323 | void | |
324 | input_init(void) | |
325 | { | |
326 | add_command(&source_cmd); | |
327 | } |