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rhdata.c
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/*
* rawhide - find files using pretty C expressions
* https://raf.org/rawhide
* https://github.com/raforg/rawhide
* https://codeberg.org/raforg/rawhide
*
* Copyright (C) 1990 Ken Stauffer, 2022-2023 raf <raf@raf.org>
*
* This program 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.
*
* This program 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 this program; if not, see <https://www.gnu.org/licenses/>.
*
* 20231013 raf <raf@raf.org>
*/
#define _GNU_SOURCE /* For FNM_EXTMATCH and FNM_CASEFOLD in <fnmatch.h> */
#define _FILE_OFFSET_BITS 64 /* For 64-bit off_t on 32-bit systems (Not AIX) */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fnmatch.h>
#include <time.h>
#include <sys/stat.h>
#define DATA
#include "rh.h"
#include "rhdata.h"
#include "rhcmds.h"
#include "rherr.h"
char *prog_name; /* Name of this program for messages */
symbol_t *symbols; /* Symbol table */
symbol_t *tokensym; /* Current token symbol */
llong tokenval; /* Current token value */
llong token; /* Current token code */
instr_t Program[MAX_PROGRAM_SIZE]; /* Program instructions */
llong PC; /* Program counter */
llong startPC; /* Initial program counter */
char Strbuf[MAX_DATA_SIZE]; /* Storage for string literals */
llong strfree = 0; /* Index into Strbuf for the next string literal */
reffile_t RefFile[MAX_REFFILE_SIZE]; /* Storage for reference files */
llong reffree = 0; /* Index into RefFile for the next reference file */
llong Stack[MAX_STACK_SIZE + 3]; /* Stack */
llong SP; /* Stack pointer */
llong FP; /* Frame pointer */
runtime_t attr; /* Configuration and runtime state */
char *expstr; /* The -e option argument (search criteria expression) */
char *expfname; /* The -f option argument (filename) or current config file */
FILE *expfile; /* FILE handle corresponding to the -f option argument or current config file */
#ifndef S_IFDOOR
#define S_IFDOOR 0150000
#endif
/* Initial built-in symbol table */
static symbol_t init_syms[] =
{
/* stat structure fields */
{ "dev", FIELD, 0, c_dev, NULL },
{ "major", FIELD, 0, c_major, NULL },
{ "minor", FIELD, 0, c_minor, NULL },
{ "ino", FIELD, 0, c_ino, NULL },
{ "mode", FIELD, 0, c_mode, NULL },
{ "nlink", FIELD, 0, c_nlink, NULL },
{ "uid", FIELD, 0, c_uid, NULL },
{ "gid", FIELD, 0, c_gid, NULL },
{ "rdev", FIELD, 0, c_rdev, NULL },
{ "rmajor", FIELD, 0, c_rmajor, NULL },
{ "rminor", FIELD, 0, c_rminor, NULL },
{ "size", FIELD, 0, c_size, NULL },
{ "blksize", FIELD, 0, c_blksize, NULL },
{ "blocks", FIELD, 0, c_blocks, NULL },
{ "atime", FIELD, 0, c_atime, NULL },
{ "mtime", FIELD, 0, c_mtime, NULL },
{ "ctime", FIELD, 0, c_ctime, NULL },
/* Linux ext2-style file attributes and BSD file flags */
#if HAVE_ATTR || HAVE_FLAGS
{ "attr", FIELD, 0, c_attr, NULL },
#endif
#if HAVE_ATTR
{ "proj", FIELD, 0, c_proj, NULL },
{ "gen", FIELD, 0, c_gen, NULL },
#endif
/* Miscellaneous functions and control flow */
{ "nouser", FIELD, 0, c_nouser, NULL },
{ "nogroup", FIELD, 0, c_nogroup, NULL },
{ "readable", FIELD, 0, c_readable, NULL },
{ "writable", FIELD, 0, c_writable, NULL },
{ "executable", FIELD, 0, c_executable, NULL },
{ "strlen", FIELD, 0, c_strlen, NULL },
{ "depth", FIELD, 0, c_depth, NULL },
{ "prune", FIELD, 0, c_prune, NULL },
{ "trim", FIELD, 0, c_trim, NULL },
{ "exit", FIELD, 0, c_exit, NULL },
/* Time */
{ "now", NUMBER, 0, c_number, NULL }, /* Set by rawhide_init() */
{ "today", NUMBER, 0, c_number, NULL }, /* Set by rawhide_init() */
{ "second", NUMBER, 1, c_number, NULL },
{ "minute", NUMBER, 60, c_number, NULL },
{ "hour", NUMBER, 60 * 60, c_number, NULL },
{ "day", NUMBER, 60 * 60 * 24, c_number, NULL },
{ "week", NUMBER, 60 * 60 * 24 * 7, c_number, NULL },
{ "month", NUMBER, 60 * 60 * 24 * 365.2425 / 12, c_number, NULL },
{ "year", NUMBER, 60 * 60 * 24 * 365.2425, c_number, NULL },
/* Constants from <sys/stat.h> */
{ "IFREG", NUMBER, S_IFREG, c_number, NULL },
{ "IFDIR", NUMBER, S_IFDIR, c_number, NULL },
{ "IFLNK", NUMBER, S_IFLNK, c_number, NULL },
{ "IFCHR", NUMBER, S_IFCHR, c_number, NULL },
{ "IFBLK", NUMBER, S_IFBLK, c_number, NULL },
{ "IFSOCK", NUMBER, S_IFSOCK, c_number, NULL },
{ "IFIFO", NUMBER, S_IFIFO, c_number, NULL },
{ "IFDOOR", NUMBER, S_IFDOOR, c_number, NULL },
{ "IFMT", NUMBER, S_IFMT, c_number, NULL },
{ "ISUID", NUMBER, S_ISUID, c_number, NULL },
{ "ISGID", NUMBER, S_ISGID, c_number, NULL },
{ "ISVTX", NUMBER, S_ISVTX, c_number, NULL },
{ "IRWXU", NUMBER, S_IRWXU, c_number, NULL },
{ "IRUSR", NUMBER, S_IRUSR, c_number, NULL },
{ "IWUSR", NUMBER, S_IWUSR, c_number, NULL },
{ "IXUSR", NUMBER, S_IXUSR, c_number, NULL },
{ "IRWXG", NUMBER, S_IRWXG, c_number, NULL },
{ "IRGRP", NUMBER, S_IRGRP, c_number, NULL },
{ "IWGRP", NUMBER, S_IWGRP, c_number, NULL },
{ "IXGRP", NUMBER, S_IXGRP, c_number, NULL },
{ "IRWXO", NUMBER, S_IRWXO, c_number, NULL },
{ "IROTH", NUMBER, S_IROTH, c_number, NULL },
{ "IWOTH", NUMBER, S_IWOTH, c_number, NULL },
{ "IXOTH", NUMBER, S_IXOTH, c_number, NULL },
/* Symlink target stat structure fields */
{ "texists", FIELD, 0, t_exists, NULL },
{ "tdev", FIELD, 0, t_dev, NULL },
{ "tmajor", FIELD, 0, t_major, NULL },
{ "tminor", FIELD, 0, t_minor, NULL },
{ "tino", FIELD, 0, t_ino, NULL },
{ "tmode", FIELD, 0, t_mode, NULL },
{ "tnlink", FIELD, 0, t_nlink, NULL },
{ "tuid", FIELD, 0, t_uid, NULL },
{ "tgid", FIELD, 0, t_gid, NULL },
{ "trdev", FIELD, 0, t_rdev, NULL },
{ "trmajor", FIELD, 0, t_rmajor, NULL },
{ "trminor", FIELD, 0, t_rminor, NULL },
{ "tsize", FIELD, 0, t_size, NULL },
{ "tblksize", FIELD, 0, t_blksize, NULL },
{ "tblocks", FIELD, 0, t_blocks, NULL },
{ "tatime", FIELD, 0, t_atime, NULL },
{ "tmtime", FIELD, 0, t_mtime, NULL },
{ "tctime", FIELD, 0, t_ctime, NULL },
{ "tstrlen", FIELD, 0, t_strlen, NULL },
/* Reference file stat structure fields */
{ ".exists", REFFILE, 0, r_exists, NULL },
{ ".dev", REFFILE, 0, r_dev, NULL },
{ ".major", REFFILE, 0, r_major, NULL },
{ ".minor", REFFILE, 0, r_minor, NULL },
{ ".ino", REFFILE, 0, r_ino, NULL },
{ ".mode", REFFILE, 0, r_mode, NULL },
{ ".type", REFFILE, 0, r_type, NULL },
{ ".perm", REFFILE, 0, r_perm, NULL },
{ ".nlink", REFFILE, 0, r_nlink, NULL },
{ ".uid", REFFILE, 0, r_uid, NULL },
{ ".gid", REFFILE, 0, r_gid, NULL },
{ ".rdev", REFFILE, 0, r_rdev, NULL },
{ ".rmajor", REFFILE, 0, r_rmajor, NULL },
{ ".rminor", REFFILE, 0, r_rminor, NULL },
{ ".size", REFFILE, 0, r_size, NULL },
{ ".blksize", REFFILE, 0, r_blksize, NULL },
{ ".blocks", REFFILE, 0, r_blocks, NULL },
{ ".atime", REFFILE, 0, r_atime, NULL },
{ ".mtime", REFFILE, 0, r_mtime, NULL },
{ ".ctime", REFFILE, 0, r_ctime, NULL },
#if HAVE_ATTR || HAVE_FLAGS
{ ".attr", REFFILE, 0, r_attr, NULL },
#endif
#if HAVE_ATTR
{ ".proj", REFFILE, 0, r_proj, NULL },
{ ".gen", REFFILE, 0, r_gen, NULL },
#endif
{ ".strlen", REFFILE, 0, r_strlen, NULL },
{ ".inode", REFFILE, 0, r_ino, NULL },
{ ".nlinks", REFFILE, 0, r_nlink, NULL },
{ ".user", REFFILE, 0, r_uid, NULL },
{ ".group", REFFILE, 0, r_gid, NULL },
{ ".sz", REFFILE, 0, r_size, NULL },
{ ".accessed", REFFILE, 0, r_atime, NULL },
{ ".modified", REFFILE, 0, r_mtime, NULL },
{ ".changed", REFFILE, 0, r_ctime, NULL },
#if HAVE_ATTR || HAVE_FLAGS
{ ".attribute", REFFILE, 0, r_attr, NULL },
#endif
#if HAVE_ATTR
{ ".project", REFFILE, 0, r_proj, NULL },
{ ".generation", REFFILE, 0, r_gen, NULL },
#endif
{ ".len", REFFILE, 0, r_strlen, NULL },
/* Pattern modifiers */
#ifdef FNM_CASEFOLD
{ ".i", PATMOD, 0, c_i, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".re", PATMOD, 0, c_re, NULL },
{ ".rei", PATMOD, 0, c_rei, NULL },
#endif
{ ".path", PATMOD, 0, c_path, NULL },
#ifdef FNM_CASEFOLD
{ ".ipath", PATMOD, 0, c_ipath, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".repath", PATMOD, 0, c_repath, NULL },
{ ".reipath", PATMOD, 0, c_reipath, NULL },
#endif
{ ".link", PATMOD, 0, c_link, NULL },
#ifdef FNM_CASEFOLD
{ ".ilink", PATMOD, 0, c_ilink, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".relink", PATMOD, 0, c_relink, NULL },
{ ".reilink", PATMOD, 0, c_reilink, NULL },
#endif
{ ".body", PATMOD, 0, c_body, NULL },
#ifdef FNM_CASEFOLD
{ ".ibody", PATMOD, 0, c_ibody, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".rebody", PATMOD, 0, c_rebody, NULL },
{ ".reibody", PATMOD, 0, c_reibody, NULL },
#endif
#ifdef HAVE_MAGIC
{ ".what", PATMOD, 0, c_what, NULL },
#ifdef FNM_CASEFOLD
{ ".iwhat", PATMOD, 0, c_iwhat, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".rewhat", PATMOD, 0, c_rewhat, NULL },
{ ".reiwhat", PATMOD, 0, c_reiwhat, NULL },
#endif
#endif
#ifdef HAVE_MAGIC
{ ".mime", PATMOD, 0, c_mime, NULL },
#ifdef FNM_CASEFOLD
{ ".imime", PATMOD, 0, c_imime, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".remime", PATMOD, 0, c_remime, NULL },
{ ".reimime", PATMOD, 0, c_reimime, NULL },
#endif
#endif
#ifdef HAVE_ACL
{ ".acl", PATMOD, 0, c_acl, NULL },
#ifdef FNM_CASEFOLD
{ ".iacl", PATMOD, 0, c_iacl, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".reacl", PATMOD, 0, c_reacl, NULL },
{ ".reiacl", PATMOD, 0, c_reiacl, NULL },
#endif
#endif
#ifdef HAVE_EA
{ ".ea", PATMOD, 0, c_ea, NULL },
#ifdef FNM_CASEFOLD
{ ".iea", PATMOD, 0, c_iea, NULL },
#endif
#ifdef HAVE_PCRE2
{ ".reea", PATMOD, 0, c_reea, NULL },
{ ".reiea", PATMOD, 0, c_reiea, NULL },
#endif
#endif
{ ".sh", PATMOD, 0, c_sh, NULL },
};
/*
void rawhide_init(void);
Prepare the symbol table with built-in symbols.
Set the values for "now" and "today".
Must be called before the -h option is processed.
*/
void rawhide_init(void)
{
symbol_t *sym;
struct tm *tm;
time_t t;
int i;
symbols = &init_syms[0];
for (i = 0; i < sizeof(init_syms) / sizeof(symbol_t) - 1; i++)
init_syms[i].next = &init_syms[i + 1];
/* Initialize "now" to the time right now */
sym = locate_symbol("now");
sym->value = (llong)time(&t);
/* Initialize "today" to the time last midnight (local time) */
tm = localtime(&t);
tm->tm_hour = tm->tm_min = tm->tm_sec = 0;
tm->tm_isdst = -1;
t = mktime(tm);
sym = locate_symbol("today");
sym->value = (llong)t;
/* Initialize Program */
PC = 0;
startPC = -1;
}
/*
void rawhide_finish(void);
Free non-built-in symbols.
Must be called after parsing.
Can be called before searching.
*/
void rawhide_finish(void)
{
symbol_t *s;
while (symbols->type == PARAM || symbols->type == FUNCTION || symbols->type == IDENTIFIER)
{
s = symbols;
symbols = symbols->next;
free(s->name);
free(s);
}
}
/*
symbol_t *insert_symbol(char *name, int toktype, llong val);
Insert a new symbol into the symbol table.
The name parameter is its name.
The toktype parameter is its type.
The val parameter is its value, or zero.
Return a pointer to the symbol table entry.
The symbol is inserted at the head of the linked list.
This behaviour is relied upon elsewhere.
*/
symbol_t *insert_symbol(char *name, int toktype, llong val)
{
symbol_t *sym;
if (!(sym = malloc(sizeof(symbol_t))))
return NULL;
if (!(sym->name = strdup(name)))
{
free(sym);
return NULL;
}
sym->type = toktype;
sym->value = val;
sym->next = symbols;
symbols = sym;
return sym;
}
/*
symbol_t *locate_symbol(char *name);
Search for a symbol in the symbol table.
The name parameter is the name of the symbol to search for.
*/
symbol_t *locate_symbol(char *name)
{
symbol_t *s;
for (s = symbols; s; s = s->next)
if (!strcmp(name, s->name))
return s;
return NULL;
}
/*
symbol_t *locate_patmod_prefix(char *name);
Search for a pattern modifier symbol in the symbol table.
The name parameter is hopefully a unique prefix of a symbol,
but it is not a complete symbol.
*/
symbol_t *locate_patmod_prefix(char *name)
{
symbol_t *s, *match = NULL;
for (s = symbols; s; s = s->next)
{
if (s->type != PATMOD)
continue;
if (!strncmp(name, s->name, strlen(name)))
{
if (match)
return NULL; /* Not a unique prefix */
match = s;
}
}
return match;
}
/*
int rawhide_instruction(void (*func)(llong), llong value);
Append a rawhide instruction to the Program array.
The func parameter is the instruction's implementation.
The value parameter is the argument to that function.
*/
int rawhide_instruction(void (*func)(llong), llong value)
{
if (PC >= MAX_PROGRAM_SIZE)
return -1;
Program[PC].func = func;
Program[PC++].value = value;
return 0;
}
/*
llong rawhide_execute(void);
Execute the program stored in Program.
Each element of Program contains a pointer to a function.
The program is NULL-terminated.
Returns the value of the expression.
*/
llong rawhide_execute(void)
{
for (SP = 0, PC = startPC; Program[PC].func; PC++)
{
(*Program[PC].func)(Program[PC].value);
if (SP >= MAX_STACK_SIZE)
fatal("stack overflow");
}
return Stack[0];
}
/* vi:set ts=4 sw=4: */