POSIX specifies a dprintf function that operates on an fd instead of a stdio stream. Using upper case for macros is more idiomatic too. We no longer need to use an extra set of parentheses for debugging printf statements.
263 lines
6.7 KiB
C
263 lines
6.7 KiB
C
/****************************************************************
|
|
Copyright (C) Lucent Technologies 1997
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and
|
|
its documentation for any purpose and without fee is hereby
|
|
granted, provided that the above copyright notice appear in all
|
|
copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name Lucent Technologies or any of
|
|
its entities not be used in advertising or publicity pertaining
|
|
to distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
|
|
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
|
|
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
|
|
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
|
|
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
|
THIS SOFTWARE.
|
|
****************************************************************/
|
|
|
|
const char *version = "version 20200612";
|
|
|
|
#define DEBUG
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <locale.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include "awk.h"
|
|
#include "ytab.h"
|
|
|
|
extern char **environ;
|
|
extern int nfields;
|
|
|
|
int dbg = 0;
|
|
Awkfloat srand_seed = 1;
|
|
char *cmdname; /* gets argv[0] for error messages */
|
|
extern FILE *yyin; /* lex input file */
|
|
char *lexprog; /* points to program argument if it exists */
|
|
extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
|
|
enum compile_states compile_time = ERROR_PRINTING;
|
|
|
|
static char **pfile; /* program filenames from -f's */
|
|
static size_t maxpfile; /* max program filename */
|
|
static size_t npfile; /* number of filenames */
|
|
static size_t curpfile; /* current filename */
|
|
|
|
bool safe = false; /* true => "safe" mode */
|
|
|
|
static noreturn void fpecatch(int n
|
|
#ifdef SA_SIGINFO
|
|
, siginfo_t *si, void *uc
|
|
#endif
|
|
)
|
|
{
|
|
#ifdef SA_SIGINFO
|
|
static const char *emsg[] = {
|
|
[0] = "Unknown error",
|
|
[FPE_INTDIV] = "Integer divide by zero",
|
|
[FPE_INTOVF] = "Integer overflow",
|
|
[FPE_FLTDIV] = "Floating point divide by zero",
|
|
[FPE_FLTOVF] = "Floating point overflow",
|
|
[FPE_FLTUND] = "Floating point underflow",
|
|
[FPE_FLTRES] = "Floating point inexact result",
|
|
[FPE_FLTINV] = "Invalid Floating point operation",
|
|
[FPE_FLTSUB] = "Subscript out of range",
|
|
};
|
|
#endif
|
|
FATAL("floating point exception"
|
|
#ifdef SA_SIGINFO
|
|
": %s", (size_t)si->si_code < sizeof(emsg) / sizeof(emsg[0]) &&
|
|
emsg[si->si_code] ? emsg[si->si_code] : emsg[0]
|
|
#endif
|
|
);
|
|
}
|
|
|
|
/* Can this work with recursive calls? I don't think so.
|
|
void segvcatch(int n)
|
|
{
|
|
FATAL("segfault. Do you have an unbounded recursive call?", n);
|
|
}
|
|
*/
|
|
|
|
static const char *
|
|
setfs(char *p)
|
|
{
|
|
/* wart: t=>\t */
|
|
if (p[0] == 't' && p[1] == '\0')
|
|
return "\t";
|
|
else if (p[0] != '\0')
|
|
return p;
|
|
return NULL;
|
|
}
|
|
|
|
static char *
|
|
getarg(int *argc, char ***argv, const char *msg)
|
|
{
|
|
if ((*argv)[1][2] != '\0') { /* arg is -fsomething */
|
|
return &(*argv)[1][2];
|
|
} else { /* arg is -f something */
|
|
(*argc)--; (*argv)++;
|
|
if (*argc <= 1)
|
|
FATAL("%s", msg);
|
|
return (*argv)[1];
|
|
}
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
const char *fs = NULL;
|
|
char *fn, *vn;
|
|
|
|
setlocale(LC_CTYPE, "");
|
|
setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */
|
|
cmdname = argv[0];
|
|
if (argc == 1) {
|
|
fprintf(stderr,
|
|
"usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n",
|
|
cmdname);
|
|
exit(1);
|
|
}
|
|
#ifdef SA_SIGINFO
|
|
{
|
|
struct sigaction sa;
|
|
sa.sa_sigaction = fpecatch;
|
|
sa.sa_flags = SA_SIGINFO;
|
|
sigemptyset(&sa.sa_mask);
|
|
(void)sigaction(SIGFPE, &sa, NULL);
|
|
}
|
|
#else
|
|
(void)signal(SIGFPE, fpecatch);
|
|
#endif
|
|
/*signal(SIGSEGV, segvcatch); experiment */
|
|
|
|
/* Set and keep track of the random seed */
|
|
srand_seed = 1;
|
|
srandom((unsigned long) srand_seed);
|
|
|
|
yyin = NULL;
|
|
symtab = makesymtab(NSYMTAB/NSYMTAB);
|
|
while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
|
|
if (strcmp(argv[1], "-version") == 0 || strcmp(argv[1], "--version") == 0) {
|
|
printf("awk %s\n", version);
|
|
return 0;
|
|
}
|
|
if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
|
|
argc--;
|
|
argv++;
|
|
break;
|
|
}
|
|
switch (argv[1][1]) {
|
|
case 's':
|
|
if (strcmp(argv[1], "-safe") == 0)
|
|
safe = true;
|
|
break;
|
|
case 'f': /* next argument is program filename */
|
|
fn = getarg(&argc, &argv, "no program filename");
|
|
if (npfile >= maxpfile) {
|
|
maxpfile += 20;
|
|
pfile = realloc(pfile, maxpfile * sizeof(*pfile));
|
|
if (pfile == NULL)
|
|
FATAL("error allocating space for -f options");
|
|
}
|
|
pfile[npfile++] = fn;
|
|
break;
|
|
case 'F': /* set field separator */
|
|
fs = setfs(getarg(&argc, &argv, "no field separator"));
|
|
if (fs == NULL)
|
|
WARNING("field separator FS is empty");
|
|
break;
|
|
case 'v': /* -v a=1 to be done NOW. one -v for each */
|
|
vn = getarg(&argc, &argv, "no variable name");
|
|
if (isclvar(vn))
|
|
setclvar(vn);
|
|
else
|
|
FATAL("invalid -v option argument: %s", vn);
|
|
break;
|
|
case 'd':
|
|
dbg = atoi(&argv[1][2]);
|
|
if (dbg == 0)
|
|
dbg = 1;
|
|
printf("awk %s\n", version);
|
|
break;
|
|
default:
|
|
WARNING("unknown option %s ignored", argv[1]);
|
|
break;
|
|
}
|
|
argc--;
|
|
argv++;
|
|
}
|
|
/* argv[1] is now the first argument */
|
|
if (npfile == 0) { /* no -f; first argument is program */
|
|
if (argc <= 1) {
|
|
if (dbg)
|
|
exit(0);
|
|
FATAL("no program given");
|
|
}
|
|
DPRINTF("program = |%s|\n", argv[1]);
|
|
lexprog = argv[1];
|
|
argc--;
|
|
argv++;
|
|
}
|
|
recinit(recsize);
|
|
syminit();
|
|
compile_time = COMPILING;
|
|
argv[0] = cmdname; /* put prog name at front of arglist */
|
|
DPRINTF("argc=%d, argv[0]=%s\n", argc, argv[0]);
|
|
arginit(argc, argv);
|
|
if (!safe)
|
|
envinit(environ);
|
|
yyparse();
|
|
#if 0
|
|
// Doing this would comply with POSIX, but is not compatible with
|
|
// other awks and with what most users expect. So comment it out.
|
|
setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */
|
|
#endif
|
|
if (fs)
|
|
*FS = qstring(fs, '\0');
|
|
DPRINTF("errorflag=%d\n", errorflag);
|
|
if (errorflag == 0) {
|
|
compile_time = RUNNING;
|
|
run(winner);
|
|
} else
|
|
bracecheck();
|
|
return(errorflag);
|
|
}
|
|
|
|
int pgetc(void) /* get 1 character from awk program */
|
|
{
|
|
int c;
|
|
|
|
for (;;) {
|
|
if (yyin == NULL) {
|
|
if (curpfile >= npfile)
|
|
return EOF;
|
|
if (strcmp(pfile[curpfile], "-") == 0)
|
|
yyin = stdin;
|
|
else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
|
|
FATAL("can't open file %s", pfile[curpfile]);
|
|
lineno = 1;
|
|
}
|
|
if ((c = getc(yyin)) != EOF)
|
|
return c;
|
|
if (yyin != stdin)
|
|
fclose(yyin);
|
|
yyin = NULL;
|
|
curpfile++;
|
|
}
|
|
}
|
|
|
|
char *cursource(void) /* current source file name */
|
|
{
|
|
if (npfile > 0)
|
|
return pfile[curpfile];
|
|
else
|
|
return NULL;
|
|
}
|