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Diffstat (limited to 'builtins/mkbuiltins.c')
| -rw-r--r-- | builtins/mkbuiltins.c | 1692 |
1 files changed, 1692 insertions, 0 deletions
diff --git a/builtins/mkbuiltins.c b/builtins/mkbuiltins.c new file mode 100644 index 0000000..f505ebd --- /dev/null +++ b/builtins/mkbuiltins.c @@ -0,0 +1,1692 @@ +/* mkbuiltins.c - Create builtins.c, builtext.h, and builtdoc.c from + a single source file called builtins.def. */ + +/* Copyright (C) 1987-2022 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#if !defined (CROSS_COMPILING) +# include <config.h> +#else /* CROSS_COMPILING */ +/* A conservative set of defines based on POSIX/SUS3/XPG6 */ +# define HAVE_UNISTD_H +# define HAVE_STRING_H +# define HAVE_STDLIB_H + +# define HAVE_RENAME +#endif /* CROSS_COMPILING */ + +#if defined (HAVE_UNISTD_H) +# ifdef _MINIX +# include <sys/types.h> +# endif +# include <unistd.h> +#endif + +#ifndef _MINIX +# include "../bashtypes.h" +# if defined (HAVE_SYS_FILE_H) +# include <sys/file.h> +# endif +#endif + +#include "posixstat.h" +#include "filecntl.h" + +#include "../bashansi.h" +#include <stdio.h> +#include <errno.h> + +#include "stdc.h" + +#define DOCFILE "builtins.texi" + +#ifndef errno +extern int errno; +#endif + +static char *xmalloc (), *xrealloc (); + +#if !defined (__STDC__) && !defined (strcpy) +extern char *strcpy (); +#endif /* !__STDC__ && !strcpy */ + +#define savestring(x) strcpy (xmalloc (1 + strlen (x)), (x)) +#define whitespace(c) (((c) == ' ') || ((c) == '\t')) + +/* Flag values that builtins can have. */ +#define BUILTIN_FLAG_SPECIAL 0x01 +#define BUILTIN_FLAG_ASSIGNMENT 0x02 +#define BUILTIN_FLAG_LOCALVAR 0x04 +#define BUILTIN_FLAG_POSIX_BUILTIN 0x08 +#define BUILTIN_FLAG_ARRAYREF_ARG 0x10 + +#define BASE_INDENT 4 + +/* If this stream descriptor is non-zero, then write + texinfo documentation to it. */ +FILE *documentation_file = (FILE *)NULL; + +/* Non-zero means to only produce documentation. */ +int only_documentation = 0; + +/* Non-zero means to not do any productions. */ +int inhibit_production = 0; + +/* Non-zero means to not add functions (xxx_builtin) to the members of the + produced `struct builtin []' */ +int inhibit_functions = 0; + +/* Non-zero means to produce separate help files for each builtin, named by + the builtin name, in `./helpfiles'. */ +int separate_helpfiles = 0; + +/* Non-zero means to create single C strings for each `longdoc', with + embedded newlines, for ease of translation. */ +int single_longdoc_strings = 1; + +/* The name of a directory into which the separate external help files will + eventually be installed. */ +char *helpfile_directory; + +/* The name of a directory to precede the filename when reporting + errors. */ +char *error_directory = (char *)NULL; + +/* The name of the structure file. */ +char *struct_filename = (char *)NULL; + +/* The name of the external declaration file. */ +char *extern_filename = (char *)NULL; + +/* The name of the include file to write into the structure file, if it's + different from extern_filename. */ +char *include_filename = (char *)NULL; + +/* The name of the include file to put into the generated struct filename. */ + +/* Here is a structure for manipulating arrays of data. */ +typedef struct { + int size; /* Number of slots allocated to array. */ + int sindex; /* Current location in array. */ + int width; /* Size of each element. */ + int growth_rate; /* How fast to grow. */ + char **array; /* The array itself. */ +} ARRAY; + +/* Here is a structure defining a single BUILTIN. */ +typedef struct { + char *name; /* The name of this builtin. */ + char *function; /* The name of the function to call. */ + char *shortdoc; /* The short documentation for this builtin. */ + char *docname; /* Possible name for documentation string. */ + ARRAY *longdoc; /* The long documentation for this builtin. */ + ARRAY *dependencies; /* Null terminated array of #define names. */ + int flags; /* Flags for this builtin. */ +} BUILTIN_DESC; + +/* Here is a structure which defines a DEF file. */ +typedef struct { + char *filename; /* The name of the input def file. */ + ARRAY *lines; /* The contents of the file. */ + int line_number; /* The current line number. */ + char *production; /* The name of the production file. */ + FILE *output; /* Open file stream for PRODUCTION. */ + ARRAY *builtins; /* Null terminated array of BUILTIN_DESC *. */ +} DEF_FILE; + +/* The array of all builtins encountered during execution of this code. */ +ARRAY *saved_builtins = (ARRAY *)NULL; + +/* The Posix.2 so-called `special' builtins. */ +char *special_builtins[] = +{ + ":", ".", "source", "break", "continue", "eval", "exec", "exit", + "export", "readonly", "return", "set", "shift", "times", "trap", "unset", + (char *)NULL +}; + +/* The builtin commands that take assignment statements as arguments. */ +char *assignment_builtins[] = +{ + "alias", "declare", "export", "local", "readonly", "typeset", + (char *)NULL +}; + +char *localvar_builtins[] = +{ + "declare", "local", "typeset", (char *)NULL +}; + +/* The builtin commands that are special to the POSIX search order. */ +char *posix_builtins[] = +{ + "alias", "bg", "cd", "command", "false", "fc", "fg", "getopts", "jobs", + "kill", "newgrp", "pwd", "read", "true", "umask", "unalias", "wait", + (char *)NULL +}; + +/* The builtin commands that can take array references as arguments and pay + attention to `assoc_expand_once'. These are the ones that don't assign + values, but need to avoid double expansions. */ +char *arrayvar_builtins[] = +{ + "declare", "let", "local", "printf", "read", "test", "[", + "typeset", "unset", "wait", /*]*/ + (char *)NULL +}; + +/* Forward declarations. */ +static int is_special_builtin (); +static int is_assignment_builtin (); +static int is_localvar_builtin (); +static int is_posix_builtin (); +static int is_arrayvar_builtin (); + +#if !defined (HAVE_RENAME) +static int rename (); +#endif + +void extract_info (); + +void file_error (); +void line_error (); + +void write_file_headers (); +void write_file_footers (); +void write_ifdefs (); +void write_endifs (); +void write_documentation (); +void write_longdocs (); +void write_builtins (); + +int write_helpfiles (); + +void free_defs (); +void add_documentation (); + +void must_be_building (); +void remove_trailing_whitespace (); + +#define document_name(b) ((b)->docname ? (b)->docname : (b)->name) + + +/* For each file mentioned on the command line, process it and + write the information to STRUCTFILE and EXTERNFILE, while + creating the production file if necessary. */ +int +main (argc, argv) + int argc; + char **argv; +{ + int arg_index = 1; + FILE *structfile, *externfile; + char *documentation_filename, *temp_struct_filename; + + structfile = externfile = (FILE *)NULL; + documentation_filename = DOCFILE; + temp_struct_filename = (char *)NULL; + + while (arg_index < argc && argv[arg_index][0] == '-') + { + char *arg = argv[arg_index++]; + + if (strcmp (arg, "-externfile") == 0) + extern_filename = argv[arg_index++]; + else if (strcmp (arg, "-includefile") == 0) + include_filename = argv[arg_index++]; + else if (strcmp (arg, "-structfile") == 0) + struct_filename = argv[arg_index++]; + else if (strcmp (arg, "-noproduction") == 0) + inhibit_production = 1; + else if (strcmp (arg, "-nofunctions") == 0) + inhibit_functions = 1; + else if (strcmp (arg, "-document") == 0) + documentation_file = fopen (documentation_filename, "w"); + else if (strcmp (arg, "-D") == 0) + { + int len; + + if (error_directory) + free (error_directory); + + error_directory = xmalloc (2 + strlen (argv[arg_index])); + strcpy (error_directory, argv[arg_index]); + len = strlen (error_directory); + + if (len && error_directory[len - 1] != '/') + strcat (error_directory, "/"); + + arg_index++; + } + else if (strcmp (arg, "-documentonly") == 0) + { + only_documentation = 1; + documentation_file = fopen (documentation_filename, "w"); + } + else if (strcmp (arg, "-H") == 0) + { + separate_helpfiles = 1; + helpfile_directory = argv[arg_index++]; + } + else if (strcmp (arg, "-S") == 0) + single_longdoc_strings = 0; + else + { + fprintf (stderr, "%s: Unknown flag %s.\n", argv[0], arg); + exit (2); + } + } + + if (include_filename == 0) + include_filename = extern_filename; + + /* If there are no files to process, just quit now. */ + if (arg_index == argc) + exit (0); + + if (!only_documentation) + { + /* Open the files. */ + if (struct_filename) + { + temp_struct_filename = xmalloc (15); + sprintf (temp_struct_filename, "mk-%ld", (long) getpid ()); + structfile = fopen (temp_struct_filename, "w"); + + if (!structfile) + file_error (temp_struct_filename); + } + + if (extern_filename) + { + externfile = fopen (extern_filename, "w"); + + if (!externfile) + file_error (extern_filename); + } + + /* Write out the headers. */ + write_file_headers (structfile, externfile); + } + + if (documentation_file) + { + fprintf (documentation_file, "@c Table of builtins created with %s.\n", + argv[0]); + fprintf (documentation_file, "@ftable @asis\n"); + } + + /* Process the .def files. */ + while (arg_index < argc) + { + register char *arg; + + arg = argv[arg_index++]; + + extract_info (arg, structfile, externfile); + } + + /* Close the files. */ + if (!only_documentation) + { + /* Write the footers. */ + write_file_footers (structfile, externfile); + + if (structfile) + { + write_longdocs (structfile, saved_builtins); + fclose (structfile); + rename (temp_struct_filename, struct_filename); + } + + if (externfile) + fclose (externfile); + } + +#if 0 + /* This is now done by a different program */ + if (separate_helpfiles) + { + write_helpfiles (saved_builtins); + } +#endif + + if (documentation_file) + { + fprintf (documentation_file, "@end ftable\n"); + fclose (documentation_file); + } + + exit (0); +} + +/* **************************************************************** */ +/* */ +/* Array Functions and Manipulators */ +/* */ +/* **************************************************************** */ + +/* Make a new array, and return a pointer to it. The array will + contain elements of size WIDTH, and is initialized to no elements. */ +ARRAY * +array_create (width) + int width; +{ + ARRAY *array; + + array = (ARRAY *)xmalloc (sizeof (ARRAY)); + array->size = 0; + array->sindex = 0; + array->width = width; + + /* Default to increasing size in units of 20. */ + array->growth_rate = 20; + + array->array = (char **)NULL; + + return (array); +} + +/* Copy the array of strings in ARRAY. */ +ARRAY * +copy_string_array (array) + ARRAY *array; +{ + register int i; + ARRAY *copy; + + if (!array) + return (ARRAY *)NULL; + + copy = array_create (sizeof (char *)); + + copy->size = array->size; + copy->sindex = array->sindex; + copy->width = array->width; + + copy->array = (char **)xmalloc ((1 + array->sindex) * sizeof (char *)); + + for (i = 0; i < array->sindex; i++) + copy->array[i] = savestring (array->array[i]); + + copy->array[i] = (char *)NULL; + + return (copy); +} + +/* Add ELEMENT to ARRAY, growing the array if necessary. */ +void +array_add (element, array) + char *element; + ARRAY *array; +{ + if (array->sindex + 2 > array->size) + array->array = (char **)xrealloc + (array->array, (array->size += array->growth_rate) * array->width); + + array->array[array->sindex++] = element; + array->array[array->sindex] = (char *)NULL; +} + +/* Free an allocated array and data pointer. */ +void +array_free (array) + ARRAY *array; +{ + if (array->array) + free (array->array); + + free (array); +} + +/* **************************************************************** */ +/* */ +/* Processing a DEF File */ +/* */ +/* **************************************************************** */ + +/* The definition of a function. */ +typedef int Function (); +typedef int mk_handler_func_t PARAMS((char *, DEF_FILE *, char *)); + +/* Structure handles processor directives. */ +typedef struct { + char *directive; + mk_handler_func_t *function; +} HANDLER_ENTRY; + +extern int builtin_handler PARAMS((char *, DEF_FILE *, char *)); +extern int function_handler PARAMS((char *, DEF_FILE *, char *)); +extern int short_doc_handler PARAMS((char *, DEF_FILE *, char *)); +extern int comment_handler PARAMS((char *, DEF_FILE *, char *)); +extern int depends_on_handler PARAMS((char *, DEF_FILE *, char *)); +extern int produces_handler PARAMS((char *, DEF_FILE *, char *)); +extern int end_handler PARAMS((char *, DEF_FILE *, char *)); +extern int docname_handler PARAMS((char *, DEF_FILE *, char *)); + +HANDLER_ENTRY handlers[] = { + { "BUILTIN", builtin_handler }, + { "DOCNAME", docname_handler }, + { "FUNCTION", function_handler }, + { "SHORT_DOC", short_doc_handler }, + { "$", comment_handler }, + { "COMMENT", comment_handler }, + { "DEPENDS_ON", depends_on_handler }, + { "PRODUCES", produces_handler }, + { "END", end_handler }, + { (char *)NULL, (mk_handler_func_t *)NULL } +}; + +/* Return the entry in the table of handlers for NAME. */ +HANDLER_ENTRY * +find_directive (directive) + char *directive; +{ + register int i; + + for (i = 0; handlers[i].directive; i++) + if (strcmp (handlers[i].directive, directive) == 0) + return (&handlers[i]); + + return ((HANDLER_ENTRY *)NULL); +} + +/* Non-zero indicates that a $BUILTIN has been seen, but not + the corresponding $END. */ +static int building_builtin = 0; + +/* Non-zero means to output cpp line and file information before + printing the current line to the production file. */ +int output_cpp_line_info = 0; + +/* The main function of this program. Read FILENAME and act on what is + found. Lines not starting with a dollar sign are copied to the + $PRODUCES target, if one is present. Lines starting with a dollar sign + are directives to this program, specifying the name of the builtin, the + function to call, the short documentation and the long documentation + strings. FILENAME can contain multiple $BUILTINs, but only one $PRODUCES + target. After the file has been processed, write out the names of + builtins found in each $BUILTIN. Plain text found before the $PRODUCES + is ignored, as is "$$ comment text". */ +void +extract_info (filename, structfile, externfile) + char *filename; + FILE *structfile, *externfile; +{ + register int i; + DEF_FILE *defs; + struct stat finfo; + size_t file_size; + char *buffer, *line; + int fd, nr; + + if (stat (filename, &finfo) == -1) + file_error (filename); + + fd = open (filename, O_RDONLY, 0666); + + if (fd == -1) + file_error (filename); + + file_size = (size_t)finfo.st_size; + buffer = xmalloc (1 + file_size); + + if ((nr = read (fd, buffer, file_size)) < 0) + file_error (filename); + + /* This is needed on WIN32, and does not hurt on Unix. */ + if (nr < file_size) + file_size = nr; + + close (fd); + + if (nr == 0) + { + fprintf (stderr, "mkbuiltins: %s: skipping zero-length file\n", filename); + free (buffer); + return; + } + + /* Create and fill in the initial structure describing this file. */ + defs = (DEF_FILE *)xmalloc (sizeof (DEF_FILE)); + defs->filename = filename; + defs->lines = array_create (sizeof (char *)); + defs->line_number = 0; + defs->production = (char *)NULL; + defs->output = (FILE *)NULL; + defs->builtins = (ARRAY *)NULL; + + /* Build the array of lines. */ + i = 0; + while (i < file_size) + { + array_add (&buffer[i], defs->lines); + + while (i < file_size && buffer[i] != '\n') + i++; + buffer[i++] = '\0'; + } + + /* Begin processing the input file. We don't write any output + until we have a file to write output to. */ + output_cpp_line_info = 1; + + /* Process each line in the array. */ + for (i = 0; line = defs->lines->array[i]; i++) + { + defs->line_number = i; + + if (*line == '$') + { + register int j; + char *directive; + HANDLER_ENTRY *handler; + + /* Isolate the directive. */ + for (j = 0; line[j] && !whitespace (line[j]); j++); + + directive = xmalloc (j); + strncpy (directive, line + 1, j - 1); + directive[j -1] = '\0'; + + /* Get the function handler and call it. */ + handler = find_directive (directive); + + if (!handler) + { + line_error (defs, "Unknown directive `%s'", directive); + free (directive); + continue; + } + else + { + /* Advance to the first non-whitespace character. */ + while (whitespace (line[j])) + j++; + + /* Call the directive handler with the FILE, and ARGS. */ + (*(handler->function)) (directive, defs, line + j); + } + free (directive); + } + else + { + if (building_builtin) + add_documentation (defs, line); + else if (defs->output) + { + if (output_cpp_line_info) + { + /* If we're handed an absolute pathname, don't prepend + the directory name. */ + if (defs->filename[0] == '/') + fprintf (defs->output, "#line %d \"%s\"\n", + defs->line_number + 1, defs->filename); + else + fprintf (defs->output, "#line %d \"%s%s\"\n", + defs->line_number + 1, + error_directory ? error_directory : "./", + defs->filename); + output_cpp_line_info = 0; + } + + fprintf (defs->output, "%s\n", line); + } + } + } + + /* Close the production file. */ + if (defs->output) + fclose (defs->output); + + /* The file has been processed. Write the accumulated builtins to + the builtins.c file, and write the extern definitions to the + builtext.h file. */ + write_builtins (defs, structfile, externfile); + + free (buffer); + free_defs (defs); +} + +#define free_safely(x) if (x) free (x) + +static void +free_builtin (builtin) + BUILTIN_DESC *builtin; +{ + register int i; + + free_safely (builtin->name); + free_safely (builtin->function); + free_safely (builtin->shortdoc); + free_safely (builtin->docname); + + if (builtin->longdoc) + array_free (builtin->longdoc); + + if (builtin->dependencies) + { + for (i = 0; builtin->dependencies->array[i]; i++) + free (builtin->dependencies->array[i]); + array_free (builtin->dependencies); + } +} + +/* Free all of the memory allocated to a DEF_FILE. */ +void +free_defs (defs) + DEF_FILE *defs; +{ + register int i; + register BUILTIN_DESC *builtin; + + if (defs->production) + free (defs->production); + + if (defs->lines) + array_free (defs->lines); + + if (defs->builtins) + { + for (i = 0; builtin = (BUILTIN_DESC *)defs->builtins->array[i]; i++) + { + free_builtin (builtin); + free (builtin); + } + array_free (defs->builtins); + } + free (defs); +} + +/* **************************************************************** */ +/* */ +/* The Handler Functions Themselves */ +/* */ +/* **************************************************************** */ + +/* Strip surrounding whitespace from STRING, and + return a pointer to the start of it. */ +char * +strip_whitespace (string) + char *string; +{ + while (whitespace (*string)) + string++; + + remove_trailing_whitespace (string); + return (string); +} + +/* Remove only the trailing whitespace from STRING. */ +void +remove_trailing_whitespace (string) + char *string; +{ + register int i; + + i = strlen (string) - 1; + + while (i > 0 && whitespace (string[i])) + i--; + + string[++i] = '\0'; +} + +/* Ensure that there is a argument in STRING and return it. + FOR_WHOM is the name of the directive which needs the argument. + DEFS is the DEF_FILE in which the directive is found. + If there is no argument, produce an error. */ +char * +get_arg (for_whom, defs, string) + char *for_whom, *string; + DEF_FILE *defs; +{ + char *new; + + new = strip_whitespace (string); + + if (!*new) + line_error (defs, "%s requires an argument", for_whom); + + return (savestring (new)); +} + +/* Error if not building a builtin. */ +void +must_be_building (directive, defs) + char *directive; + DEF_FILE *defs; +{ + if (!building_builtin) + line_error (defs, "%s must be inside of a $BUILTIN block", directive); +} + +/* Return the current builtin. */ +BUILTIN_DESC * +current_builtin (directive, defs) + char *directive; + DEF_FILE *defs; +{ + must_be_building (directive, defs); + if (defs->builtins) + return ((BUILTIN_DESC *)defs->builtins->array[defs->builtins->sindex - 1]); + else + return ((BUILTIN_DESC *)NULL); +} + +/* Add LINE to the long documentation for the current builtin. + Ignore blank lines until the first non-blank line has been seen. */ +void +add_documentation (defs, line) + DEF_FILE *defs; + char *line; +{ + register BUILTIN_DESC *builtin; + + builtin = current_builtin ("(implied LONGDOC)", defs); + + remove_trailing_whitespace (line); + + if (!*line && !builtin->longdoc) + return; + + if (!builtin->longdoc) + builtin->longdoc = array_create (sizeof (char *)); + + array_add (line, builtin->longdoc); +} + +/* How to handle the $BUILTIN directive. */ +int +builtin_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + BUILTIN_DESC *new; + char *name; + + /* If we are already building a builtin, we cannot start a new one. */ + if (building_builtin) + { + line_error (defs, "%s found before $END", self); + return (-1); + } + + output_cpp_line_info++; + + /* Get the name of this builtin, and stick it in the array. */ + name = get_arg (self, defs, arg); + + /* If this is the first builtin, create the array to hold them. */ + if (!defs->builtins) + defs->builtins = array_create (sizeof (BUILTIN_DESC *)); + + new = (BUILTIN_DESC *)xmalloc (sizeof (BUILTIN_DESC)); + new->name = name; + new->function = (char *)NULL; + new->shortdoc = (char *)NULL; + new->docname = (char *)NULL; + new->longdoc = (ARRAY *)NULL; + new->dependencies = (ARRAY *)NULL; + new->flags = 0; + + if (is_special_builtin (name)) + new->flags |= BUILTIN_FLAG_SPECIAL; + if (is_assignment_builtin (name)) + new->flags |= BUILTIN_FLAG_ASSIGNMENT; + if (is_localvar_builtin (name)) + new->flags |= BUILTIN_FLAG_LOCALVAR; + if (is_posix_builtin (name)) + new->flags |= BUILTIN_FLAG_POSIX_BUILTIN; + if (is_arrayvar_builtin (name)) + new->flags |= BUILTIN_FLAG_ARRAYREF_ARG; + + array_add ((char *)new, defs->builtins); + building_builtin = 1; + + return (0); +} + +/* How to handle the $FUNCTION directive. */ +int +function_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + register BUILTIN_DESC *builtin; + + builtin = current_builtin (self, defs); + + if (builtin == 0) + { + line_error (defs, "syntax error: no current builtin for $FUNCTION directive"); + exit (1); + } + if (builtin->function) + line_error (defs, "%s already has a function (%s)", + builtin->name, builtin->function); + else + builtin->function = get_arg (self, defs, arg); + + return (0); +} + +/* How to handle the $DOCNAME directive. */ +int +docname_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + register BUILTIN_DESC *builtin; + + builtin = current_builtin (self, defs); + + if (builtin->docname) + line_error (defs, "%s already had a docname (%s)", + builtin->name, builtin->docname); + else + builtin->docname = get_arg (self, defs, arg); + + return (0); +} + +/* How to handle the $SHORT_DOC directive. */ +int +short_doc_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + register BUILTIN_DESC *builtin; + + builtin = current_builtin (self, defs); + + if (builtin->shortdoc) + line_error (defs, "%s already has short documentation (%s)", + builtin->name, builtin->shortdoc); + else + builtin->shortdoc = get_arg (self, defs, arg); + + return (0); +} + +/* How to handle the $COMMENT directive. */ +int +comment_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + return (0); +} + +/* How to handle the $DEPENDS_ON directive. */ +int +depends_on_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + register BUILTIN_DESC *builtin; + char *dependent; + + builtin = current_builtin (self, defs); + dependent = get_arg (self, defs, arg); + + if (!builtin->dependencies) + builtin->dependencies = array_create (sizeof (char *)); + + array_add (dependent, builtin->dependencies); + + return (0); +} + +/* How to handle the $PRODUCES directive. */ +int +produces_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + /* If just hacking documentation, don't change any of the production + files. */ + if (only_documentation) + return (0); + + output_cpp_line_info++; + + if (defs->production) + line_error (defs, "%s already has a %s definition", defs->filename, self); + else + { + defs->production = get_arg (self, defs, arg); + + if (inhibit_production) + return (0); + + defs->output = fopen (defs->production, "w"); + + if (!defs->output) + file_error (defs->production); + + fprintf (defs->output, "/* %s, created from %s. */\n", + defs->production, defs->filename); + } + return (0); +} + +/* How to handle the $END directive. */ +int +end_handler (self, defs, arg) + char *self; + DEF_FILE *defs; + char *arg; +{ + must_be_building (self, defs); + building_builtin = 0; + return (0); +} + +/* **************************************************************** */ +/* */ +/* Error Handling Functions */ +/* */ +/* **************************************************************** */ + +/* Produce an error for DEFS with FORMAT and ARGS. */ +void +line_error (defs, format, arg1, arg2) + DEF_FILE *defs; + char *format, *arg1, *arg2; +{ + if (defs->filename[0] != '/') + fprintf (stderr, "%s", error_directory ? error_directory : "./"); + fprintf (stderr, "%s:%d:", defs->filename, defs->line_number + 1); + fprintf (stderr, format, arg1, arg2); + fprintf (stderr, "\n"); + fflush (stderr); +} + +/* Print error message for FILENAME. */ +void +file_error (filename) + char *filename; +{ + perror (filename); + exit (2); +} + +/* **************************************************************** */ +/* */ +/* xmalloc and xrealloc () */ +/* */ +/* **************************************************************** */ + +static void memory_error_and_abort (); + +static char * +xmalloc (bytes) + int bytes; +{ + char *temp = (char *)malloc (bytes); + + if (!temp) + memory_error_and_abort (); + return (temp); +} + +static char * +xrealloc (pointer, bytes) + char *pointer; + int bytes; +{ + char *temp; + + if (!pointer) + temp = (char *)malloc (bytes); + else + temp = (char *)realloc (pointer, bytes); + + if (!temp) + memory_error_and_abort (); + + return (temp); +} + +static void +memory_error_and_abort () +{ + fprintf (stderr, "mkbuiltins: out of virtual memory\n"); + abort (); +} + +/* **************************************************************** */ +/* */ +/* Creating the Struct and Extern Files */ +/* */ +/* **************************************************************** */ + +/* Return a pointer to a newly allocated builtin which is + an exact copy of BUILTIN. */ +BUILTIN_DESC * +copy_builtin (builtin) + BUILTIN_DESC *builtin; +{ + BUILTIN_DESC *new; + + new = (BUILTIN_DESC *)xmalloc (sizeof (BUILTIN_DESC)); + + new->name = savestring (builtin->name); + new->shortdoc = savestring (builtin->shortdoc); + new->longdoc = copy_string_array (builtin->longdoc); + new->dependencies = copy_string_array (builtin->dependencies); + + new->function = + builtin->function ? savestring (builtin->function) : (char *)NULL; + new->docname = + builtin->docname ? savestring (builtin->docname) : (char *)NULL; + + return (new); +} + +/* How to save away a builtin. */ +void +save_builtin (builtin) + BUILTIN_DESC *builtin; +{ + BUILTIN_DESC *newbuiltin; + + newbuiltin = copy_builtin (builtin); + + /* If this is the first builtin to be saved, create the array + to hold it. */ + if (!saved_builtins) + saved_builtins = array_create (sizeof (BUILTIN_DESC *)); + + array_add ((char *)newbuiltin, saved_builtins); +} + +/* Flags that mean something to write_documentation (). */ +#define STRING_ARRAY 0x01 +#define TEXINFO 0x02 +#define PLAINTEXT 0x04 +#define HELPFILE 0x08 + +char *structfile_header[] = { + "/* builtins.c -- the built in shell commands. */", + "", + "/* This file is manufactured by ./mkbuiltins, and should not be", + " edited by hand. See the source to mkbuiltins for details. */", + "", + "/* Copyright (C) 1987-2022 Free Software Foundation, Inc.", + "", + " This file is part of GNU Bash, the Bourne Again SHell.", + "", + " Bash is free software: you can redistribute it and/or modify", + " it under the terms of the GNU General Public License as published by", + " the Free Software Foundation, either version 3 of the License, or", + " (at your option) any later version.", + "", + " Bash is distributed in the hope that it will be useful,", + " but WITHOUT ANY WARRANTY; without even the implied warranty of", + " MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the", + " GNU General Public License for more details.", + "", + " You should have received a copy of the GNU General Public License", + " along with Bash. If not, see <http://www.gnu.org/licenses/>.", + "*/", + "", + "/* The list of shell builtins. Each element is name, function, flags,", + " long-doc, short-doc. The long-doc field contains a pointer to an array", + " of help lines. The function takes a WORD_LIST *; the first word in the", + " list is the first arg to the command. The list has already had word", + " expansion performed.", + "", + " Functions which need to look at only the simple commands (e.g.", + " the enable_builtin ()), should ignore entries where", + " (array[i].function == (sh_builtin_func_t *)NULL). Such entries are for", + " the list of shell reserved control structures, like `if' and `while'.", + " The end of the list is denoted with a NULL name field. */", + "", + "/* TRANSLATORS: Please do not translate command names in descriptions */", + "", + "#include \"../builtins.h\"", + (char *)NULL + }; + +char *structfile_footer[] = { + " { (char *)0x0, (sh_builtin_func_t *)0x0, 0, (char **)0x0, (char *)0x0, (char *)0x0 }", + "};", + "", + "struct builtin *shell_builtins = static_shell_builtins;", + "struct builtin *current_builtin;", + "", + "int num_shell_builtins =", + "\tsizeof (static_shell_builtins) / sizeof (struct builtin) - 1;", + (char *)NULL +}; + +/* Write out any necessary opening information for + STRUCTFILE and EXTERNFILE. */ +void +write_file_headers (structfile, externfile) + FILE *structfile, *externfile; +{ + register int i; + + if (structfile) + { + for (i = 0; structfile_header[i]; i++) + fprintf (structfile, "%s\n", structfile_header[i]); + + fprintf (structfile, "#include \"%s\"\n", + include_filename ? include_filename : "builtext.h"); + + fprintf (structfile, "#include \"bashintl.h\"\n"); + + fprintf (structfile, "\nstruct builtin static_shell_builtins[] = {\n"); + } + + if (externfile) + fprintf (externfile, + "/* %s - The list of builtins found in libbuiltins.a. */\n", + include_filename ? include_filename : "builtext.h"); +} + +/* Write out any necessary closing information for + STRUCTFILE and EXTERNFILE. */ +void +write_file_footers (structfile, externfile) + FILE *structfile, *externfile; +{ + register int i; + + /* Write out the footers. */ + if (structfile) + { + for (i = 0; structfile_footer[i]; i++) + fprintf (structfile, "%s\n", structfile_footer[i]); + } +} + +/* Write out the information accumulated in DEFS to + STRUCTFILE and EXTERNFILE. */ +void +write_builtins (defs, structfile, externfile) + DEF_FILE *defs; + FILE *structfile, *externfile; +{ + register int i; + + /* Write out the information. */ + if (defs->builtins) + { + register BUILTIN_DESC *builtin; + + for (i = 0; i < defs->builtins->sindex; i++) + { + builtin = (BUILTIN_DESC *)defs->builtins->array[i]; + + /* Write out any #ifdefs that may be there. */ + if (!only_documentation) + { + if (builtin->dependencies) + { + write_ifdefs (externfile, builtin->dependencies->array); + write_ifdefs (structfile, builtin->dependencies->array); + } + + /* Write the extern definition. */ + if (externfile) + { + if (builtin->function) + fprintf (externfile, "extern int %s PARAMS((WORD_LIST *));\n", + builtin->function); + + fprintf (externfile, "extern char * const %s_doc[];\n", + document_name (builtin)); + } + + /* Write the structure definition. */ + if (structfile) + { + fprintf (structfile, " { \"%s\", ", builtin->name); + + if (builtin->function && inhibit_functions == 0) + fprintf (structfile, "%s, ", builtin->function); + else + fprintf (structfile, "(sh_builtin_func_t *)0x0, "); + + fprintf (structfile, "%s%s%s%s%s%s, %s_doc,\n", + "BUILTIN_ENABLED | STATIC_BUILTIN", + (builtin->flags & BUILTIN_FLAG_SPECIAL) ? " | SPECIAL_BUILTIN" : "", + (builtin->flags & BUILTIN_FLAG_ASSIGNMENT) ? " | ASSIGNMENT_BUILTIN" : "", + (builtin->flags & BUILTIN_FLAG_LOCALVAR) ? " | LOCALVAR_BUILTIN" : "", + (builtin->flags & BUILTIN_FLAG_POSIX_BUILTIN) ? " | POSIX_BUILTIN" : "", + (builtin->flags & BUILTIN_FLAG_ARRAYREF_ARG) ? " | ARRAYREF_BUILTIN" : "", + document_name (builtin)); + + /* Don't translate short document summaries that are identical + to command names */ + if (builtin->shortdoc && strcmp (builtin->name, builtin->shortdoc) == 0) + { + if (inhibit_functions) + fprintf (structfile, " \"%s\", \"%s\" },\n", + builtin->shortdoc ? builtin->shortdoc : builtin->name, + document_name (builtin)); + else + fprintf (structfile, " \"%s\", (char *)NULL },\n", + builtin->shortdoc ? builtin->shortdoc : builtin->name); + } + else + { + if (inhibit_functions) + fprintf (structfile, " N_(\"%s\"), \"%s\" },\n", + builtin->shortdoc ? builtin->shortdoc : builtin->name, + document_name (builtin)); + else + fprintf (structfile, " N_(\"%s\"), (char *)NULL },\n", + builtin->shortdoc ? builtin->shortdoc : builtin->name); + } + } + + if (structfile || separate_helpfiles) + /* Save away this builtin for later writing of the + long documentation strings. */ + save_builtin (builtin); + + /* Write out the matching #endif, if necessary. */ + if (builtin->dependencies) + { + if (externfile) + write_endifs (externfile, builtin->dependencies->array); + + if (structfile) + write_endifs (structfile, builtin->dependencies->array); + } + } + + if (documentation_file) + { + fprintf (documentation_file, "@item %s\n", builtin->name); + write_documentation + (documentation_file, builtin->longdoc->array, 0, TEXINFO); + } + } + } +} + +/* Write out the long documentation strings in BUILTINS to STREAM. */ +void +write_longdocs (stream, builtins) + FILE *stream; + ARRAY *builtins; +{ + register int i; + register BUILTIN_DESC *builtin; + char *dname; + char *sarray[2]; + + for (i = 0; i < builtins->sindex; i++) + { + builtin = (BUILTIN_DESC *)builtins->array[i]; + + if (builtin->dependencies) + write_ifdefs (stream, builtin->dependencies->array); + + /* Write the long documentation strings. */ + dname = document_name (builtin); + fprintf (stream, "char * const %s_doc[] =", dname); + + if (separate_helpfiles) + { + int l = strlen (helpfile_directory) + strlen (dname) + 1; + sarray[0] = (char *)xmalloc (l + 1); + sprintf (sarray[0], "%s/%s", helpfile_directory, dname); + sarray[1] = (char *)NULL; + write_documentation (stream, sarray, 0, STRING_ARRAY|HELPFILE); + free (sarray[0]); + } + else + write_documentation (stream, builtin->longdoc->array, 0, STRING_ARRAY); + + if (builtin->dependencies) + write_endifs (stream, builtin->dependencies->array); + + } +} + +void +write_dummy_declarations (stream, builtins) + FILE *stream; + ARRAY *builtins; +{ + register int i; + BUILTIN_DESC *builtin; + + for (i = 0; structfile_header[i]; i++) + fprintf (stream, "%s\n", structfile_header[i]); + + for (i = 0; i < builtins->sindex; i++) + { + builtin = (BUILTIN_DESC *)builtins->array[i]; + + /* How to guarantee that no builtin is written more than once? */ + fprintf (stream, "int %s () { return (0); }\n", builtin->function); + } +} + +/* Write an #ifdef string saying what needs to be defined (or not defined) + in order to allow compilation of the code that will follow. + STREAM is the stream to write the information to, + DEFINES is a null terminated array of define names. + If a define is preceded by an `!', then the sense of the test is + reversed. */ +void +write_ifdefs (stream, defines) + FILE *stream; + char **defines; +{ + register int i; + + if (!stream) + return; + + fprintf (stream, "#if "); + + for (i = 0; defines[i]; i++) + { + char *def = defines[i]; + + if (*def == '!') + fprintf (stream, "!defined (%s)", def + 1); + else + fprintf (stream, "defined (%s)", def); + + if (defines[i + 1]) + fprintf (stream, " && "); + } + fprintf (stream, "\n"); +} + +/* Write an #endif string saying what defines controlled the compilation + of the immediately preceding code. + STREAM is the stream to write the information to. + DEFINES is a null terminated array of define names. */ +void +write_endifs (stream, defines) + FILE *stream; + char **defines; +{ + register int i; + + if (!stream) + return; + + fprintf (stream, "#endif /* "); + + for (i = 0; defines[i]; i++) + { + fprintf (stream, "%s", defines[i]); + + if (defines[i + 1]) + fprintf (stream, " && "); + } + + fprintf (stream, " */\n"); +} + +/* Write DOCUMENTATION to STREAM, perhaps surrounding it with double-quotes + and quoting special characters in the string. Handle special things for + internationalization (gettext) and the single-string vs. multiple-strings + issues. */ +void +write_documentation (stream, documentation, indentation, flags) + FILE *stream; + char **documentation; + int indentation, flags; +{ + register int i, j; + register char *line; + int string_array, texinfo, base_indent, filename_p; + + if (stream == 0) + return; + + string_array = flags & STRING_ARRAY; + filename_p = flags & HELPFILE; + + if (string_array) + { + fprintf (stream, " {\n#if defined (HELP_BUILTIN)\n"); /* } */ + if (single_longdoc_strings) + { + if (filename_p == 0) + { + if (documentation && documentation[0] && documentation[0][0]) + fprintf (stream, "N_(\""); + else + fprintf (stream, "N_(\" "); /* the empty string translates specially. */ + } + else + fprintf (stream, "\""); + } + } + + base_indent = (string_array && single_longdoc_strings && filename_p == 0) ? BASE_INDENT : 0; + + for (i = 0, texinfo = (flags & TEXINFO); documentation && (line = documentation[i]); i++) + { + /* Allow #ifdef's to be written out verbatim, but don't put them into + separate help files. */ + if (*line == '#') + { + if (string_array && filename_p == 0 && single_longdoc_strings == 0) + fprintf (stream, "%s\n", line); + continue; + } + + /* prefix with N_( for gettext */ + if (string_array && single_longdoc_strings == 0) + { + if (filename_p == 0) + { + if (line[0]) + fprintf (stream, " N_(\""); + else + fprintf (stream, " N_(\" "); /* the empty string translates specially. */ + } + else + fprintf (stream, " \""); + } + + if (indentation) + for (j = 0; j < indentation; j++) + fprintf (stream, " "); + + /* Don't indent the first line, because of how the help builtin works. */ + if (i == 0) + indentation += base_indent; + + if (string_array) + { + for (j = 0; line[j]; j++) + { + switch (line[j]) + { + case '\\': + case '"': + fprintf (stream, "\\%c", line[j]); + break; + + default: + fprintf (stream, "%c", line[j]); + } + } + + /* closing right paren for gettext */ + if (single_longdoc_strings == 0) + { + if (filename_p == 0) + fprintf (stream, "\"),\n"); + else + fprintf (stream, "\",\n"); + } + else if (documentation[i+1]) + /* don't add extra newline after last line */ + fprintf (stream, "\\n\\\n"); + } + else if (texinfo) + { + for (j = 0; line[j]; j++) + { + switch (line[j]) + { + case '@': + case '{': + case '}': + fprintf (stream, "@%c", line[j]); + break; + + default: + fprintf (stream, "%c", line[j]); + } + } + fprintf (stream, "\n"); + } + else + fprintf (stream, "%s\n", line); + } + + /* closing right paren for gettext */ + if (string_array && single_longdoc_strings) + { + if (filename_p == 0) + fprintf (stream, "\"),\n"); + else + fprintf (stream, "\",\n"); + } + + if (string_array) + fprintf (stream, "#endif /* HELP_BUILTIN */\n (char *)NULL\n};\n"); +} + +int +write_helpfiles (builtins) + ARRAY *builtins; +{ + char *helpfile, *bname; + FILE *helpfp; + int i, hdlen; + BUILTIN_DESC *builtin; + + i = mkdir ("helpfiles", 0777); + if (i < 0 && errno != EEXIST) + { + fprintf (stderr, "write_helpfiles: helpfiles: cannot create directory\n"); + return -1; + } + + hdlen = strlen ("helpfiles/"); + for (i = 0; i < builtins->sindex; i++) + { + builtin = (BUILTIN_DESC *)builtins->array[i]; + + bname = document_name (builtin); + helpfile = (char *)xmalloc (hdlen + strlen (bname) + 1); + sprintf (helpfile, "helpfiles/%s", bname); + + helpfp = fopen (helpfile, "w"); + if (helpfp == 0) + { + fprintf (stderr, "write_helpfiles: cannot open %s\n", helpfile); + free (helpfile); + continue; + } + + write_documentation (helpfp, builtin->longdoc->array, 4, PLAINTEXT); + + fflush (helpfp); + fclose (helpfp); + free (helpfile); + } + return 0; +} + +static int +_find_in_table (name, name_table) + char *name, *name_table[]; +{ + register int i; + + for (i = 0; name_table[i]; i++) + if (strcmp (name, name_table[i]) == 0) + return 1; + return 0; +} + +static int +is_special_builtin (name) + char *name; +{ + return (_find_in_table (name, special_builtins)); +} + +static int +is_assignment_builtin (name) + char *name; +{ + return (_find_in_table (name, assignment_builtins)); +} + +static int +is_localvar_builtin (name) + char *name; +{ + return (_find_in_table (name, localvar_builtins)); +} + +static int +is_posix_builtin (name) + char *name; +{ + return (_find_in_table (name, posix_builtins)); +} + +static int +is_arrayvar_builtin (name) + char *name; +{ + return (_find_in_table (name, arrayvar_builtins)); +} + +#if !defined (HAVE_RENAME) +static int +rename (from, to) + char *from, *to; +{ + unlink (to); + if (link (from, to) < 0) + return (-1); + unlink (from); + return (0); +} +#endif /* !HAVE_RENAME */ |