PostgreSQL Source Code  git master
ecpg.c
Go to the documentation of this file.
1 /* src/interfaces/ecpg/preproc/ecpg.c */
2 
3 /* Main for ecpg, the PostgreSQL embedded SQL precompiler. */
4 /* Copyright (c) 1996-2024, PostgreSQL Global Development Group */
5 
6 #include "postgres_fe.h"
7 
8 #include <unistd.h>
9 
10 #include "getopt_long.h"
11 
12 #include "preproc_extern.h"
13 
14 int ret_value = 0;
15 bool autocommit = false,
16  auto_create_c = false,
17  system_includes = false,
19  questionmarks = false,
20  regression_mode = false,
21  auto_prepare = false;
22 
24 
26 
28 struct cursor *cur = NULL;
29 struct typedefs *types = NULL;
30 struct _defines *defines = NULL;
32 
33 static void
34 help(const char *progname)
35 {
36  printf(_("%s is the PostgreSQL embedded SQL preprocessor for C programs.\n\n"),
37  progname);
38  printf(_("Usage:\n"
39  " %s [OPTION]... FILE...\n\n"),
40  progname);
41  printf(_("Options:\n"));
42  printf(_(" -c automatically generate C code from embedded SQL code;\n"
43  " this affects EXEC SQL TYPE\n"));
44  printf(_(" -C MODE set compatibility mode; MODE can be one of\n"
45  " \"INFORMIX\", \"INFORMIX_SE\", \"ORACLE\"\n"));
46 #ifdef YYDEBUG
47  printf(_(" -d generate parser debug output\n"));
48 #endif
49  printf(_(" -D SYMBOL define SYMBOL\n"));
50  printf(_(" -h parse a header file, this option includes option \"-c\"\n"));
51  printf(_(" -i parse system include files as well\n"));
52  printf(_(" -I DIRECTORY search DIRECTORY for include files\n"));
53  printf(_(" -o OUTFILE write result to OUTFILE\n"));
54  printf(_(" -r OPTION specify run-time behavior; OPTION can be:\n"
55  " \"no_indicator\", \"prepare\", \"questionmarks\"\n"));
56  printf(_(" --regression run in regression testing mode\n"));
57  printf(_(" -t turn on autocommit of transactions\n"));
58  printf(_(" -V, --version output version information, then exit\n"));
59  printf(_(" -?, --help show this help, then exit\n"));
60  printf(_("\nIf no output file is specified, the name is formed by adding .c to the\n"
61  "input file name, after stripping off .pgc if present.\n"));
62  printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
63  printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
64 }
65 
66 static void
67 add_include_path(char *path)
68 {
69  struct _include_path *ip = include_paths,
70  *new;
71 
72  new = mm_alloc(sizeof(struct _include_path));
73  new->path = path;
74  new->next = NULL;
75 
76  if (ip == NULL)
77  include_paths = new;
78  else
79  {
80  for (; ip->next != NULL; ip = ip->next);
81  ip->next = new;
82  }
83 }
84 
85 /*
86  * Process a command line -D switch
87  */
88 static void
90 {
91  /* copy the argument to avoid relying on argv storage */
92  char *define_copy = mm_strdup(define);
93  char *ptr;
94  struct _defines *newdef;
95 
96  newdef = mm_alloc(sizeof(struct _defines));
97 
98  /* look for = sign */
99  ptr = strchr(define_copy, '=');
100  if (ptr != NULL)
101  {
102  /* symbol has a value */
103  char *tmp;
104 
105  /* strip any spaces between name and '=' */
106  for (tmp = ptr - 1; tmp >= define_copy && *tmp == ' '; tmp--);
107  tmp[1] = '\0';
108 
109  /*
110  * Note we don't bother to separately malloc cmdvalue; it will never
111  * be freed so that's not necessary.
112  */
113  newdef->cmdvalue = ptr + 1;
114  }
115  else
116  {
117  /* define it as "1"; again no need to malloc it */
118  newdef->cmdvalue = "1";
119  }
120  newdef->name = define_copy;
121  newdef->value = mm_strdup(newdef->cmdvalue);
122  newdef->used = NULL;
123  newdef->next = defines;
124  defines = newdef;
125 }
126 
127 #define ECPG_GETOPT_LONG_REGRESSION 1
128 int
129 main(int argc, char *const argv[])
130 {
131  static struct option ecpg_options[] = {
132  {"regression", no_argument, NULL, ECPG_GETOPT_LONG_REGRESSION},
133  {NULL, 0, NULL, 0}
134  };
135 
136  int fnr,
137  c,
138  out_option = 0;
139  bool verbose = false,
140  header_mode = false;
141  struct _include_path *ip;
142  const char *progname;
143  char my_exec_path[MAXPGPATH];
144  char include_path[MAXPGPATH];
145 
146  set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("ecpg"));
147 
148  progname = get_progname(argv[0]);
149 
150  if (find_my_exec(argv[0], my_exec_path) < 0)
151  {
152  fprintf(stderr, _("%s: could not locate my own executable path\n"), argv[0]);
153  return ILLEGAL_OPTION;
154  }
155 
156  if (argc > 1)
157  {
158  if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
159  {
160  help(progname);
161  exit(0);
162  }
163  if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
164  {
165  printf("ecpg (PostgreSQL) %s\n", PG_VERSION);
166  exit(0);
167  }
168  }
169 
170  output_filename = NULL;
171  while ((c = getopt_long(argc, argv, "cC:dD:hiI:o:r:tv", ecpg_options, NULL)) != -1)
172  {
173  switch (c)
174  {
175  case 'c':
176  auto_create_c = true;
177  break;
178  case 'C':
179  if (pg_strcasecmp(optarg, "INFORMIX") == 0 || pg_strcasecmp(optarg, "INFORMIX_SE") == 0)
180  {
181  char pkginclude_path[MAXPGPATH];
182  char informix_path[MAXPGPATH];
183 
185  get_pkginclude_path(my_exec_path, pkginclude_path);
186  snprintf(informix_path, MAXPGPATH, "%s/informix/esql", pkginclude_path);
187  add_include_path(informix_path);
188  }
189  else if (pg_strcasecmp(optarg, "ORACLE") == 0)
190  {
192  }
193  else
194  {
195  fprintf(stderr, _("Try \"%s --help\" for more information.\n"), argv[0]);
196  return ILLEGAL_OPTION;
197  }
198  break;
199  case 'd':
200 #ifdef YYDEBUG
201  base_yydebug = 1;
202 #else
203  fprintf(stderr, _("%s: parser debug support (-d) not available\n"),
204  progname);
205 #endif
206  break;
207  case 'D':
209  break;
210  case 'h':
211  header_mode = true;
212  /* this must include "-c" to make sense: */
213  auto_create_c = true;
214  break;
215  case 'i':
216  system_includes = true;
217  break;
218  case 'I':
220  break;
221  case 'o':
223  if (strcmp(output_filename, "-") == 0)
224  base_yyout = stdout;
225  else
227 
228  if (base_yyout == NULL)
229  {
230  fprintf(stderr, _("%s: could not open file \"%s\": %m\n"),
232  output_filename = NULL;
233  }
234  else
235  out_option = 1;
236  break;
237  case 'r':
238  if (pg_strcasecmp(optarg, "no_indicator") == 0)
239  force_indicator = false;
240  else if (pg_strcasecmp(optarg, "prepare") == 0)
241  auto_prepare = true;
242  else if (pg_strcasecmp(optarg, "questionmarks") == 0)
243  questionmarks = true;
244  else
245  {
246  fprintf(stderr, _("Try \"%s --help\" for more information.\n"), argv[0]);
247  return ILLEGAL_OPTION;
248  }
249  break;
250  case 't':
251  autocommit = true;
252  break;
253  case 'v':
254  verbose = true;
255  break;
257  regression_mode = true;
258  break;
259  default:
260  fprintf(stderr, _("Try \"%s --help\" for more information.\n"), argv[0]);
261  return ILLEGAL_OPTION;
262  }
263  }
264 
265  add_include_path(".");
266  add_include_path("/usr/local/include");
267  get_include_path(my_exec_path, include_path);
268  add_include_path(include_path);
269  add_include_path("/usr/include");
270 
271  if (verbose)
272  {
273  fprintf(stderr,
274  _("%s, the PostgreSQL embedded C preprocessor, version %s\n"),
275  progname, PG_VERSION);
276  fprintf(stderr, _("EXEC SQL INCLUDE ... search starts here:\n"));
277  for (ip = include_paths; ip != NULL; ip = ip->next)
278  fprintf(stderr, " %s\n", ip->path);
279  fprintf(stderr, _("end of search list\n"));
280  return 0;
281  }
282 
283  if (optind >= argc) /* no files specified */
284  {
285  fprintf(stderr, _("%s: no input files specified\n"), progname);
286  fprintf(stderr, _("Try \"%s --help\" for more information.\n"), argv[0]);
287  return ILLEGAL_OPTION;
288  }
289  else
290  {
291  /* after the options there must not be anything but filenames */
292  for (fnr = optind; fnr < argc; fnr++)
293  {
294  char *ptr2ext;
295 
296  /* If argv[fnr] is "-" we have to read from stdin */
297  if (strcmp(argv[fnr], "-") == 0)
298  {
299  input_filename = mm_alloc(strlen("stdin") + 1);
300  strcpy(input_filename, "stdin");
301  base_yyin = stdin;
302  }
303  else
304  {
305  input_filename = mm_alloc(strlen(argv[fnr]) + 5);
306  strcpy(input_filename, argv[fnr]);
307 
308  /* take care of relative paths */
310  ptr2ext = (ptr2ext ? strrchr(ptr2ext, '.') : strrchr(input_filename, '.'));
311 
312  /* no extension? */
313  if (ptr2ext == NULL)
314  {
315  ptr2ext = input_filename + strlen(input_filename);
316 
317  /* no extension => add .pgc or .pgh */
318  ptr2ext[0] = '.';
319  ptr2ext[1] = 'p';
320  ptr2ext[2] = 'g';
321  ptr2ext[3] = (header_mode == true) ? 'h' : 'c';
322  ptr2ext[4] = '\0';
323  }
324 
326  }
327 
328  if (out_option == 0) /* calculate the output name */
329  {
330  if (strcmp(input_filename, "stdin") == 0)
331  base_yyout = stdout;
332  else
333  {
334  output_filename = mm_alloc(strlen(input_filename) + 3);
336 
337  ptr2ext = strrchr(output_filename, '.');
338  /* make extension = .c resp. .h */
339  ptr2ext[1] = (header_mode == true) ? 'h' : 'c';
340  ptr2ext[2] = '\0';
341 
343  if (base_yyout == NULL)
344  {
345  fprintf(stderr, _("%s: could not open file \"%s\": %m\n"),
348  output_filename = NULL;
350  continue;
351  }
352  }
353  }
354 
355  if (base_yyin == NULL)
356  fprintf(stderr, _("%s: could not open file \"%s\": %m\n"),
357  progname, argv[fnr]);
358  else
359  {
360  struct cursor *ptr;
361  struct _defines *defptr;
362  struct _defines *prevdefptr;
363  struct _defines *nextdefptr;
364  struct typedefs *typeptr;
365  struct declared_list *list;
366 
367  /* remove old cursor definitions if any are still there */
368  for (ptr = cur; ptr != NULL;)
369  {
370  struct cursor *this = ptr;
371  struct arguments *l1,
372  *l2;
373 
374  free(ptr->command);
375  free(ptr->connection);
376  free(ptr->name);
377  for (l1 = ptr->argsinsert; l1; l1 = l2)
378  {
379  l2 = l1->next;
380  free(l1);
381  }
382  for (l1 = ptr->argsresult; l1; l1 = l2)
383  {
384  l2 = l1->next;
385  free(l1);
386  }
387  ptr = ptr->next;
388  free(this);
389  }
390  cur = NULL;
391 
392  /* remove old declared statements if any are still there */
393  for (list = g_declared_list; list != NULL;)
394  {
395  struct declared_list *this = list;
396 
397  list = list->next;
398  free(this);
399  }
400 
401  /* restore defines to their command-line state */
402  prevdefptr = NULL;
403  for (defptr = defines; defptr != NULL; defptr = nextdefptr)
404  {
405  nextdefptr = defptr->next;
406  if (defptr->cmdvalue != NULL)
407  {
408  /* keep it, resetting the value */
409  free(defptr->value);
410  defptr->value = mm_strdup(defptr->cmdvalue);
411  prevdefptr = defptr;
412  }
413  else
414  {
415  /* remove it */
416  if (prevdefptr != NULL)
417  prevdefptr->next = nextdefptr;
418  else
419  defines = nextdefptr;
420  free(defptr->name);
421  free(defptr->value);
422  free(defptr);
423  }
424  }
425 
426  /* and old typedefs */
427  for (typeptr = types; typeptr != NULL;)
428  {
429  struct typedefs *this = typeptr;
430 
431  free(typeptr->name);
433  free(typeptr->type);
434  typeptr = typeptr->next;
435  free(this);
436  }
437  types = NULL;
438 
439  /* initialize whenever structures */
440  memset(&when_error, 0, sizeof(struct when));
441  memset(&when_nf, 0, sizeof(struct when));
442  memset(&when_warn, 0, sizeof(struct when));
443 
444  /* and structure member lists */
445  memset(struct_member_list, 0, sizeof(struct_member_list));
446 
447  /*
448  * and our variable counter for out of scope cursors'
449  * variables
450  */
451  ecpg_internal_var = 0;
452 
453  /* finally the actual connection */
454  connection = NULL;
455 
456  /* initialize lex */
457  lex_init();
458 
459  /* we need several includes */
460  /* but not if we are in header mode */
461  if (regression_mode)
462  fprintf(base_yyout, "/* Processed by ecpg (regression mode) */\n");
463  else
464  fprintf(base_yyout, "/* Processed by ecpg (%s) */\n", PG_VERSION);
465 
466  if (header_mode == false)
467  {
468  fprintf(base_yyout, "/* These include files are added by the preprocessor */\n#include <ecpglib.h>\n#include <ecpgerrno.h>\n#include <sqlca.h>\n");
469 
470  /* add some compatibility headers */
471  if (INFORMIX_MODE)
472  fprintf(base_yyout, "/* Needed for informix compatibility */\n#include <ecpg_informix.h>\n");
473 
474  fprintf(base_yyout, "/* End of automatic include section */\n");
475  }
476 
477  if (regression_mode)
478  fprintf(base_yyout, "#define ECPGdebug(X,Y) ECPGdebug((X)+100,(Y))\n");
479 
481 
482  /* and parse the source */
483  base_yyparse();
484 
485  /*
486  * Check whether all cursors were indeed opened. It does not
487  * really make sense to declare a cursor but not open it.
488  */
489  for (ptr = cur; ptr != NULL; ptr = ptr->next)
490  if (!(ptr->opened))
491  mmerror(PARSE_ERROR, ET_WARNING, "cursor \"%s\" has been declared but not opened", ptr->name);
492 
493  if (base_yyin != NULL && base_yyin != stdin)
494  fclose(base_yyin);
495  if (out_option == 0 && base_yyout != stdout)
496  fclose(base_yyout);
497 
498  /*
499  * If there was an error, delete the output file.
500  */
501  if (ret_value != 0)
502  {
503  if (strcmp(output_filename, "-") != 0 && unlink(output_filename) != 0)
504  fprintf(stderr, _("could not remove output file \"%s\"\n"), output_filename);
505  }
506  }
507 
508  if (output_filename && out_option == 0)
509  {
511  output_filename = NULL;
512  }
513 
515  }
516  }
517  return ret_value;
518 }
#define PG_BINARY_R
Definition: c.h:1278
#define PG_TEXTDOMAIN(domain)
Definition: c.h:1217
#define PG_BINARY_W
Definition: c.h:1279
int find_my_exec(const char *argv0, char *retpath)
Definition: exec.c:160
void set_pglocale_pgservice(const char *argv0, const char *app)
Definition: exec.c:429
struct _include_path * include_paths
Definition: ecpg.c:27
bool auto_prepare
Definition: ecpg.c:21
char * output_filename
Definition: ecpg.c:23
bool regression_mode
Definition: ecpg.c:20
static void help(const char *progname)
Definition: ecpg.c:34
static void add_include_path(char *path)
Definition: ecpg.c:67
struct _defines * defines
Definition: ecpg.c:30
bool system_includes
Definition: ecpg.c:17
bool autocommit
Definition: ecpg.c:15
static void add_preprocessor_define(char *define)
Definition: ecpg.c:89
struct typedefs * types
Definition: ecpg.c:29
enum COMPAT_MODE compat
Definition: ecpg.c:25
int ret_value
Definition: ecpg.c:14
bool auto_create_c
Definition: ecpg.c:16
bool force_indicator
Definition: ecpg.c:18
#define ECPG_GETOPT_LONG_REGRESSION
Definition: ecpg.c:127
struct declared_list * g_declared_list
Definition: ecpg.c:31
bool questionmarks
Definition: ecpg.c:19
struct cursor * cur
Definition: ecpg.c:28
int main(int argc, char *const argv[])
Definition: ecpg.c:129
COMPAT_MODE
@ ECPG_COMPAT_PGSQL
@ ECPG_COMPAT_ORACLE
@ ECPG_COMPAT_INFORMIX
@ ECPG_COMPAT_INFORMIX_SE
#define INFORMIX_MODE(X)
#define _(x)
Definition: elog.c:90
int getopt_long(int argc, char *const argv[], const char *optstring, const struct option *longopts, int *longindex)
Definition: getopt_long.c:60
#define no_argument
Definition: getopt_long.h:24
char my_exec_path[MAXPGPATH]
Definition: globals.c:80
int base_yyparse(core_yyscan_t yyscanner)
#define free(a)
Definition: header.h:65
int verbose
exit(1)
const char * progname
Definition: main.c:44
void output_line_number(void)
Definition: output.c:10
struct when when_error when_nf when_warn
Definition: output.c:32
#define MAXPGPATH
PGDLLIMPORT int optind
Definition: getopt.c:50
PGDLLIMPORT char * optarg
Definition: getopt.c:52
char * last_dir_separator(const char *filename)
Definition: path.c:140
void get_include_path(const char *my_exec_path, char *ret_path)
Definition: path.c:843
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
const char * get_progname(const char *argv0)
Definition: path.c:575
#define snprintf
Definition: port.h:238
#define fprintf
Definition: port.h:242
void get_pkginclude_path(const char *my_exec_path, char *ret_path)
Definition: path.c:852
#define printf(...)
Definition: port.h:244
char * c
void lex_init(void)
void mmerror(int error_code, enum errortype type, const char *error,...) pg_attribute_printf(3
char * mm_strdup(const char *string)
Definition: type.c:25
int ecpg_internal_var
char * input_filename
#define PARSE_ERROR
struct ECPGstruct_member * struct_member_list[STRUCT_DEPTH]
#define ILLEGAL_OPTION
FILE * base_yyin
FILE * base_yyout
void * mm_alloc(size_t size)
Definition: type.c:13
Definition: type.h:179
struct _defines * next
Definition: type.h:184
char * value
Definition: type.h:181
char * name
Definition: type.h:180
void * used
Definition: type.h:183
const char * cmdvalue
Definition: type.h:182
struct _include_path * next
Definition: type.h:133
char * path
Definition: type.h:132
struct arguments * next
Definition: type.h:200
Definition: type.h:137
bool opened
Definition: type.h:142
char * command
Definition: type.h:140
struct arguments * argsinsert
Definition: type.h:143
char * name
Definition: type.h:138
char * connection
Definition: type.h:141
struct cursor * next
Definition: type.h:147
struct arguments * argsresult
Definition: type.h:145
Definition: type.h:158
char * name
Definition: type.h:159
struct ECPGstruct_member * struct_member_list
Definition: type.h:161
struct typedefs * next
Definition: type.h:163
struct this_type * type
Definition: type.h:160
Definition: type.h:88
void ECPGfree_struct_member(struct ECPGstruct_member *rm)
Definition: type.c:641
@ ET_WARNING
Definition: type.h:219