4 * Copyright (C) 2007-2015 David Lutterkort
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * Author: David Lutterkort <dlutter@redhat.com>
26 #include "safe-alloc.h"
28 #include <readline/readline.h>
29 #include <readline/history.h>
36 #include <sys/types.h>
42 /* Global variables */
44 static augeas *aug = NULL;
45 static const char *const progname = "augtool";
46 static unsigned int flags = AUG_NONE;
47 const char *root = NULL;
48 char *loadpath = NULL;
49 char *transforms = NULL;
50 size_t transformslen = 0;
51 const char *inputfile = NULL;
52 int echo_commands = 0; /* Gets also changed in main_loop */
53 bool print_version = false;
54 bool auto_save = false;
55 bool interactive = false;
57 /* History file is ~/.augeas/history */
58 char *history_file = NULL;
60 #define AUGTOOL_PROMPT "augtool> "
66 /* Not static, since prototype is in internal.h */
67 int xasprintf(char **strp, const char *format, ...) {
71 va_start (args, format);
72 result = vasprintf (strp, format, args);
79 static int child_count(const char *path) {
83 if (path[strlen(path)-1] == SEP)
84 r = asprintf(&pat, "%s*", path);
86 r = asprintf(&pat, "%s/*", path);
89 r = aug_match(aug, pat, NULL);
95 static char *readline_path_generator(const char *text, int state) {
96 static int current = 0;
97 static char **children = NULL;
98 static int nchildren = 0;
99 static char *ctx = NULL;
101 char *end = strrchr(text, SEP);
108 if ((path = strdup("*")) == NULL)
111 CALLOC(path, end - text + 2);
114 strncpy(path, text, end - text);
118 for (;current < nchildren; current++)
119 free((void *) children[current]);
120 free((void *) children);
121 nchildren = aug_match(aug, path, &children);
126 aug_get(aug, AUGEAS_CONTEXT, (const char **) &ctx);
134 while (current < nchildren) {
135 char *child = children[current];
138 char *chend = strrchr(child, SEP) + 1;
139 if (STREQLEN(chend, end, strlen(end))) {
140 if (child_count(child) > 0) {
141 char *c = realloc(child, strlen(child)+2);
150 /* strip off context if the user didn't give it */
152 char *c = realloc(child, strlen(child)-strlen(ctx)+1);
157 int ctxidx = strlen(ctx);
158 if (child[ctxidx] == SEP)
160 strcpy(c, &child[ctxidx]);
164 rl_filename_completion_desired = 1;
165 rl_completion_append_character = '\0';
174 static char *readline_command_generator(const char *text, int state) {
175 // FIXME: expose somewhere under /augeas
176 static const char *const commands[] = {
177 "quit", "clear", "defnode", "defvar",
178 "get", "label", "ins", "load", "ls", "match",
179 "mv", "cp", "rename", "print", "dump-xml", "rm", "save", "set", "setm",
180 "clearm", "span", "store", "retrieve", "transform",
181 "help", "touch", "insert", "move", "copy", "errors", NULL };
183 static int current = 0;
189 rl_completion_append_character = ' ';
190 while ((name = commands[current]) != NULL) {
192 if (STREQLEN(text, name, strlen(text)))
198 #ifndef HAVE_RL_COMPLETION_MATCHES
199 typedef char *rl_compentry_func_t(const char *, int);
200 static char **rl_completion_matches(ATTRIBUTE_UNUSED const char *text,
201 ATTRIBUTE_UNUSED rl_compentry_func_t *func) {
207 static int rl_crlf(void) {
208 if (rl_outstream != NULL)
209 putc('\n', rl_outstream);
214 #ifndef HAVE_RL_REPLACE_LINE
215 static void rl_replace_line(ATTRIBUTE_UNUSED const char *text,
216 ATTRIBUTE_UNUSED int clear_undo) {
221 static char **readline_completion(const char *text, int start,
222 ATTRIBUTE_UNUSED int end) {
224 return rl_completion_matches(text, readline_command_generator);
226 return rl_completion_matches(text, readline_path_generator);
231 static char *get_home_dir(uid_t uid) {
235 struct passwd *pw = NULL;
236 long val = sysconf(_SC_GETPW_R_SIZE_MAX);
237 size_t strbuflen = val;
242 if (ALLOC_N(strbuf, strbuflen) < 0)
245 if (getpwuid_r(uid, &pwbuf, strbuf, strbuflen, &pw) != 0 || pw == NULL) {
250 result = strdup(pw->pw_dir);
257 static void readline_init(void) {
258 rl_readline_name = "augtool";
259 rl_attempted_completion_function = readline_completion;
260 rl_completion_entry_function = readline_path_generator;
262 /* Set up persistent history */
263 char *home_dir = get_home_dir(getuid());
264 char *history_dir = NULL;
266 if (home_dir == NULL)
269 if (xasprintf(&history_dir, "%s/.augeas", home_dir) < 0)
272 if (mkdir(history_dir, 0755) < 0 && errno != EEXIST)
275 if (xasprintf(&history_file, "%s/history", history_dir) < 0)
280 read_history(history_file);
287 __attribute__((noreturn))
288 static void help(void) {
289 fprintf(stderr, "Usage: %s [OPTIONS] [COMMAND]\n", progname);
290 fprintf(stderr, "Load the Augeas tree and modify it. If no COMMAND is given, run interactively\n");
291 fprintf(stderr, "Run '%s help' to get a list of possible commands.\n",
293 fprintf(stderr, "\nOptions:\n\n");
294 fprintf(stderr, " -c, --typecheck typecheck lenses\n");
295 fprintf(stderr, " -b, --backup preserve originals of modified files with\n"
296 " extension '.augsave'\n");
297 fprintf(stderr, " -n, --new save changes in files with extension '.augnew',\n"
298 " leave original unchanged\n");
299 fprintf(stderr, " -r, --root ROOT use ROOT as the root of the filesystem\n");
300 fprintf(stderr, " -I, --include DIR search DIR for modules; can be given multiple times\n");
301 fprintf(stderr, " -t, --transform XFM add a file transform; uses the 'transform' command\n"
302 " syntax, e.g. -t 'Fstab incl /etc/fstab.bak'\n");
303 fprintf(stderr, " -e, --echo echo commands when reading from a file\n");
304 fprintf(stderr, " -f, --file FILE read commands from FILE\n");
305 fprintf(stderr, " -s, --autosave automatically save at the end of instructions\n");
306 fprintf(stderr, " -i, --interactive run an interactive shell after evaluating\n"
307 " the commands in STDIN and FILE\n");
308 fprintf(stderr, " -S, --nostdinc do not search the builtin default directories\n"
310 fprintf(stderr, " -L, --noload do not load any files into the tree on startup\n");
311 fprintf(stderr, " -A, --noautoload do not autoload modules from the search path\n");
312 fprintf(stderr, " --span load span positions for nodes related to a file\n");
313 fprintf(stderr, " --timing after executing each command, show how long it took\n");
314 fprintf(stderr, " --version print version information and exit.\n");
319 static void parse_opts(int argc, char **argv) {
321 size_t loadpathlen = 0;
323 VAL_VERSION = CHAR_MAX + 1,
324 VAL_SPAN = VAL_VERSION + 1,
325 VAL_TIMING = VAL_SPAN + 1
327 struct option options[] = {
328 { "help", 0, 0, 'h' },
329 { "typecheck", 0, 0, 'c' },
330 { "backup", 0, 0, 'b' },
331 { "new", 0, 0, 'n' },
332 { "root", 1, 0, 'r' },
333 { "include", 1, 0, 'I' },
334 { "transform", 1, 0, 't' },
335 { "echo", 0, 0, 'e' },
336 { "file", 1, 0, 'f' },
337 { "autosave", 0, 0, 's' },
338 { "interactive", 0, 0, 'i' },
339 { "nostdinc", 0, 0, 'S' },
340 { "noload", 0, 0, 'L' },
341 { "noautoload", 0, 0, 'A' },
342 { "span", 0, 0, VAL_SPAN },
343 { "timing", 0, 0, VAL_TIMING },
344 { "version", 0, 0, VAL_VERSION },
349 while ((opt = getopt_long(argc, argv, "hnbcr:I:t:ef:siSLA", options, &idx)) != -1) {
352 flags |= AUG_TYPE_CHECK;
355 flags |= AUG_SAVE_BACKUP;
358 flags |= AUG_SAVE_NEWFILE;
367 argz_add(&loadpath, &loadpathlen, optarg);
370 argz_add(&transforms, &transformslen, optarg);
385 flags |= AUG_NO_STDINC;
388 flags |= AUG_NO_LOAD;
391 flags |= AUG_NO_MODL_AUTOLOAD;
394 flags |= AUG_NO_MODL_AUTOLOAD;
395 print_version = true;
398 flags |= AUG_ENABLE_SPAN;
404 fprintf(stderr, "Try '%s --help' for more information.\n",
410 argz_stringify(loadpath, loadpathlen, PATH_SEP_CHAR);
413 static void print_version_info(void) {
417 r = aug_get(aug, "/augeas/version", &version);
421 fprintf(stderr, "augtool %s <http://augeas.net/>\n", version);
422 fprintf(stderr, "Copyright (C) 2007-2015 David Lutterkort\n");
423 fprintf(stderr, "License LGPLv2+: GNU LGPL version 2.1 or later\n");
424 fprintf(stderr, " <http://www.gnu.org/licenses/lgpl-2.1.html>\n");
425 fprintf(stderr, "This is free software: you are free to change and redistribute it.\n");
426 fprintf(stderr, "There is NO WARRANTY, to the extent permitted by law.\n\n");
427 fprintf(stderr, "Written by David Lutterkort\n");
430 fprintf(stderr, "Something went terribly wrong internally - please file a bug\n");
433 static void print_time_taken(const struct timeval *start,
434 const struct timeval *stop) {
435 time_t elapsed = (stop->tv_sec - start->tv_sec)*1000
436 + (stop->tv_usec - start->tv_usec)/1000;
437 printf("Time: %ld ms\n", elapsed);
440 static int run_command(const char *line, bool with_timing) {
442 struct timeval stop, start;
444 gettimeofday(&start, NULL);
445 result = aug_srun(aug, stdout, line);
446 gettimeofday(&stop, NULL);
447 if (with_timing && result >= 0) {
448 print_time_taken(&start, &stop);
451 if (isatty(fileno(stdin)))
456 static void print_aug_error(void) {
457 if (aug_error(aug) == AUG_ENOMEM) {
458 fprintf(stderr, "Out of memory.\n");
461 if (aug_error(aug) != AUG_NOERROR) {
462 fprintf(stderr, "error: %s\n", aug_error_message(aug));
463 if (aug_error_minor_message(aug) != NULL)
464 fprintf(stderr, "error: %s\n",
465 aug_error_minor_message(aug));
466 if (aug_error_details(aug) != NULL) {
467 fputs(aug_error_details(aug), stderr);
468 fprintf(stderr, "\n");
473 static void sigint_handler(ATTRIBUTE_UNUSED int signum) {
474 // Cancel the current line of input, along with undo info for that line.
475 rl_replace_line("", 1);
477 // Move the cursor to the next screen line, then force a re-display.
479 rl_forced_update_display();
482 static void install_signal_handlers(void) {
483 // On Ctrl-C, cancel the current line (rather than exit the program).
484 struct sigaction sigint_action;
485 MEMZERO(&sigint_action, 1);
486 sigint_action.sa_handler = sigint_handler;
487 sigemptyset(&sigint_action.sa_mask);
488 sigint_action.sa_flags = 0;
489 sigaction(SIGINT, &sigint_action, NULL);
492 static int main_loop(void) {
495 char inputline [128];
497 bool end_reached = false;
498 bool get_line = true;
499 bool in_interactive = false;
502 if (freopen(inputfile, "r", stdin) == NULL) {
504 if (asprintf(&msg, "Failed to open %s", inputfile) < 0)
505 perror("Failed to open input file");
512 install_signal_handlers();
514 // make readline silent by default
515 echo_commands = echo_commands || isatty(fileno(stdin));
519 rl_outstream = fopen("/dev/null", "w");
523 line = readline(AUGTOOL_PROMPT);
529 if (!isatty(fileno(stdin)) && interactive && !in_interactive) {
530 in_interactive = true;
533 echo_commands = true;
536 if (freopen("/dev/tty", "r", stdin) == NULL) {
537 perror("Failed to open terminal for reading");
542 // reopen stdout and stream to a tty if originally silenced or
543 // not connected to a tty, for full interactive mode
544 if (rl_outstream == NULL || !isatty(fileno(rl_outstream))) {
545 if (rl_outstream != NULL) {
546 fclose(rl_outstream);
549 if (freopen("/dev/tty", "w", stdout) == NULL) {
550 perror("Failed to reopen stdout");
553 rl_outstream = stdout;
559 strncpy(inputline, "save", sizeof(inputline));
562 printf("%s\n", line);
576 if (*line == '\0' || *line == '#') {
581 code = run_command(line, timing);
592 if (line != inputline)
597 static int run_args(int argc, char **argv) {
602 for (int i=0; i < argc; i++)
603 len += strlen(argv[i]) + 1;
604 if (ALLOC_N(line, len + 1) < 0)
606 for (int i=0; i < argc; i++) {
607 strcat(line, argv[i]);
611 printf("%s%s\n", AUGTOOL_PROMPT, line);
612 code = run_command(line, timing);
614 if (code >= 0 && auto_save)
616 printf("%ssave\n", AUGTOOL_PROMPT);
617 code = run_command("save", false);
623 return (code >= 0 || code == -2) ? 0 : -1;
626 static void add_transforms(char *ts, size_t tslen) {
630 bool added_transform = false;
632 while ((t = argz_next(ts, tslen, t))) {
633 r = xasprintf(&command, "transform %s", t);
635 fprintf(stderr, "error: Failed to add transform %s: could not allocate memory\n", t);
637 r = aug_srun(aug, stdout, command);
639 fprintf(stderr, "error: Failed to add transform %s: %s\n", t, aug_error_message(aug));
642 added_transform = true;
645 if (added_transform) {
648 fprintf(stderr, "error: Failed to load with new transforms: %s\n", aug_error_message(aug));
652 int main(int argc, char **argv) {
654 struct timeval start, stop;
656 setlocale(LC_ALL, "");
658 parse_opts(argc, argv);
661 printf("Initializing augeas ... ");
664 gettimeofday(&start, NULL);
666 aug = aug_init(root, loadpath, flags|AUG_NO_ERR_CLOSE);
668 gettimeofday(&stop, NULL);
671 print_time_taken(&start, &stop);
674 if (aug == NULL || aug_error(aug) != AUG_NOERROR) {
675 fprintf(stderr, "Failed to initialize Augeas\n");
680 add_transforms(transforms, transformslen);
682 print_version_info();
687 // Accept one command from the command line
688 r = run_args(argc - optind, argv+optind);
692 if (history_file != NULL)
693 write_history(history_file);
695 return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
701 * indent-tabs-mode: nil