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https://github.com/freebsd/freebsd-src
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![Warner Losh](/assets/img/avatar_default.png)
This is a rollup of a lot of changes. In summary, lots of bug fixes, Unicode support and CSV support to match the 2nd Edition of the Awk Book. In detail, from AWK's FIXES and FIXES.1e: From FIXES: Oct 30, 2023: multiple fixes and a minor code cleanup. disabled utf-8 for non-multibyte locales, such as C or POSIX. fixed a bad char * cast that causes incorrect results on big-endian systems. also fixed an out-of-bounds read for empty CCL. fixed a buffer overflow in substr with utf-8 strings. many thanks to Todd C Miller. Sep 24, 2023: fnematch and getrune have been overhauled to solve issues around unicode FS and RS. also fixed gsub null match issue with unicode. big thanks to Arnold Robbins. Sep 12, 2023: Fixed a length error in u8_byte2char that set RSTART to incorrect (cannot happen) value for EOL match(str, /$/). ----------------------------------------------------------------- [This entry is a summary, not a precise list of changes.] Added --csv option to enable processing of comma-separated values inputs. When --csv is enabled, fields are separated by commas, fields may be quoted with " double quotes, fields may contain embedded newlines. If no explicit separator argument is provided, split() uses the setting of --csv to determine how fields are split. Strings may now contain UTF-8 code points (not necessarily characters). Functions that operate on characters, like length, substr, index, match, etc., use UTF-8, so the length of a string of 3 emojis is 3, not 12 as it would be if bytes were counted. Regular expressions are processes as UTF-8. Unicode literals can be written as \u followed by one to eight hexadecimal digits. These may appear in strings and regular expressions. From FIXES.1e: Sep 06, 2023: Fix edge case where FS is changed on commandline. Thanks to Gordon Shephard and Miguel Pineiro Jr. Fix regular expression clobbering in the lexer, where lexer does not make a copy of regexp literals. also makedfa memory leaks have been plugged. Thanks to Miguel Pineiro Jr. Dec 15, 2022: Force hex escapes in strings to be no more than two characters, as they already are in regular expressions. This brings internal consistency, as well as consistency with gawk. Thanks to Arnold Robbins. Sep 12, 2022: adjbuf minlen error (cannot be 0) in cat, resulting in NULL pbuf. discovered by todd miller. also use-after-free issue with tempfree in cat, thanks to Miguel Pineiro Jr and valgrind. Aug 30, 2022: Various leaks and use-after-free issues plugged/fixed. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>. May 23, 2022: Memory leak when assigning a string to some of the built-in variables. allocated string erroneously marked DONTFREE. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>. Mar 14, 2022: Historic bug: command-line "name=value" assignment had been truncating its entry in ARGV. (circa 1989) Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>. Mar 3, 2022: Fixed file management memory leak that appears to have been there since the files array was first initialized with stdin, stdout, and stderr (circa 1992). Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>. December 8, 2021: The error handling in closefile and closeall was mangled. Long standing warnings had been made fatal and some fatal errors went undetected. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>. Nov 03, 2021: getline accesses uninitialized data after getrec() returns 0 on EOF and leaves the contents of buf unchanged. Thanks to Volodymyr Gubarkov, and Todd C Miller. Oct 12, 2021: The fix for #83 changed the code to insert 2 chars, but the call to adjbuf just above it only allows for 1 char. This can cause a heap buffer overflow. Sponsored by: Netflix
269 lines
6.8 KiB
C
269 lines
6.8 KiB
C
/****************************************************************
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Copyright (C) Lucent Technologies 1997
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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const char *version = "version 20231030";
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#define DEBUG
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#include <stdio.h>
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#include <ctype.h>
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#include <locale.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "awk.h"
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extern char **environ;
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extern int nfields;
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int dbg = 0;
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Awkfloat srand_seed = 1;
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char *cmdname; /* gets argv[0] for error messages */
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extern FILE *yyin; /* lex input file */
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char *lexprog; /* points to program argument if it exists */
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extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
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enum compile_states compile_time = ERROR_PRINTING;
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static char **pfile; /* program filenames from -f's */
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static size_t maxpfile; /* max program filename */
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static size_t npfile; /* number of filenames */
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static size_t curpfile; /* current filename */
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bool CSV = false; /* true for csv input */
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bool safe = false; /* true => "safe" mode */
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size_t awk_mb_cur_max = 1;
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static noreturn void fpecatch(int n
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#ifdef SA_SIGINFO
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, siginfo_t *si, void *uc
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#endif
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)
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{
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#ifdef SA_SIGINFO
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static const char *emsg[] = {
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[0] = "Unknown error",
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[FPE_INTDIV] = "Integer divide by zero",
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[FPE_INTOVF] = "Integer overflow",
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[FPE_FLTDIV] = "Floating point divide by zero",
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[FPE_FLTOVF] = "Floating point overflow",
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[FPE_FLTUND] = "Floating point underflow",
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[FPE_FLTRES] = "Floating point inexact result",
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[FPE_FLTINV] = "Invalid Floating point operation",
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[FPE_FLTSUB] = "Subscript out of range",
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};
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#endif
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FATAL("floating point exception"
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#ifdef SA_SIGINFO
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": %s", (size_t)si->si_code < sizeof(emsg) / sizeof(emsg[0]) &&
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emsg[si->si_code] ? emsg[si->si_code] : emsg[0]
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#endif
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);
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}
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/* Can this work with recursive calls? I don't think so.
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void segvcatch(int n)
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{
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FATAL("segfault. Do you have an unbounded recursive call?", n);
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}
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*/
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static const char *
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setfs(char *p)
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{
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/* wart: t=>\t */
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if (p[0] == 't' && p[1] == '\0')
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return "\t";
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return p;
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}
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static char *
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getarg(int *argc, char ***argv, const char *msg)
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{
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if ((*argv)[1][2] != '\0') { /* arg is -fsomething */
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return &(*argv)[1][2];
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} else { /* arg is -f something */
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(*argc)--; (*argv)++;
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if (*argc <= 1)
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FATAL("%s", msg);
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return (*argv)[1];
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}
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}
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int main(int argc, char *argv[])
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{
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const char *fs = NULL;
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char *fn, *vn;
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setlocale(LC_CTYPE, "");
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setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */
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awk_mb_cur_max = MB_CUR_MAX;
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cmdname = argv[0];
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if (argc == 1) {
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fprintf(stderr,
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"usage: %s [-F fs | --csv] [-v var=value] [-f progfile | 'prog'] [file ...]\n",
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cmdname);
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exit(1);
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}
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#ifdef SA_SIGINFO
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{
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struct sigaction sa;
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sa.sa_sigaction = fpecatch;
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sa.sa_flags = SA_SIGINFO;
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sigemptyset(&sa.sa_mask);
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(void)sigaction(SIGFPE, &sa, NULL);
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}
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#else
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(void)signal(SIGFPE, fpecatch);
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#endif
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/*signal(SIGSEGV, segvcatch); experiment */
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/* Set and keep track of the random seed */
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srand_seed = 1;
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srandom((unsigned long) srand_seed);
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yyin = NULL;
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symtab = makesymtab(NSYMTAB/NSYMTAB);
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while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
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if (strcmp(argv[1], "-version") == 0 || strcmp(argv[1], "--version") == 0) {
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printf("awk %s\n", version);
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return 0;
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}
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if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
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argc--;
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argv++;
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break;
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}
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if (strcmp(argv[1], "--csv") == 0) { /* turn on csv input processing */
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CSV = true;
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argc--;
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argv++;
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continue;
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}
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switch (argv[1][1]) {
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case 's':
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if (strcmp(argv[1], "-safe") == 0)
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safe = true;
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break;
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case 'f': /* next argument is program filename */
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fn = getarg(&argc, &argv, "no program filename");
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if (npfile >= maxpfile) {
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maxpfile += 20;
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pfile = (char **) realloc(pfile, maxpfile * sizeof(*pfile));
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if (pfile == NULL)
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FATAL("error allocating space for -f options");
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}
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pfile[npfile++] = fn;
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break;
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case 'F': /* set field separator */
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fs = setfs(getarg(&argc, &argv, "no field separator"));
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break;
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case 'v': /* -v a=1 to be done NOW. one -v for each */
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vn = getarg(&argc, &argv, "no variable name");
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if (isclvar(vn))
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setclvar(vn);
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else
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FATAL("invalid -v option argument: %s", vn);
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break;
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case 'd':
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dbg = atoi(&argv[1][2]);
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if (dbg == 0)
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dbg = 1;
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printf("awk %s\n", version);
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break;
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default:
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WARNING("unknown option %s ignored", argv[1]);
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break;
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}
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argc--;
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argv++;
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}
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/* argv[1] is now the first argument */
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if (npfile == 0) { /* no -f; first argument is program */
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if (argc <= 1) {
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if (dbg)
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exit(0);
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FATAL("no program given");
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}
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DPRINTF("program = |%s|\n", argv[1]);
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lexprog = argv[1];
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argc--;
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argv++;
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}
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recinit(recsize);
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syminit();
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compile_time = COMPILING;
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argv[0] = cmdname; /* put prog name at front of arglist */
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DPRINTF("argc=%d, argv[0]=%s\n", argc, argv[0]);
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arginit(argc, argv);
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if (!safe)
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envinit(environ);
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yyparse();
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#if 0
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// Doing this would comply with POSIX, but is not compatible with
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// other awks and with what most users expect. So comment it out.
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setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */
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#endif
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if (fs)
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*FS = qstring(fs, '\0');
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DPRINTF("errorflag=%d\n", errorflag);
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if (errorflag == 0) {
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compile_time = RUNNING;
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run(winner);
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} else
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bracecheck();
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return(errorflag);
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}
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int pgetc(void) /* get 1 character from awk program */
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{
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int c;
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for (;;) {
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if (yyin == NULL) {
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if (curpfile >= npfile)
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return EOF;
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if (strcmp(pfile[curpfile], "-") == 0)
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yyin = stdin;
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else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
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FATAL("can't open file %s", pfile[curpfile]);
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lineno = 1;
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}
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if ((c = getc(yyin)) != EOF)
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return c;
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if (yyin != stdin)
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fclose(yyin);
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yyin = NULL;
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curpfile++;
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}
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}
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char *cursource(void) /* current source file name */
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{
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if (npfile > 0)
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return pfile[curpfile < npfile ? curpfile : curpfile - 1];
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else
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return NULL;
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}
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