1 /****************************************************************
2 Copyright (C) Lucent Technologies 1997
5 Permission to use, copy, modify, and distribute this software and
6 its documentation for any purpose and without fee is hereby
7 granted, provided that the above copyright notice appear in all
8 copies and that both that the copyright notice and this
9 permission notice and warranty disclaimer appear in supporting
10 documentation, and that the name Lucent Technologies or any of
11 its entities not be used in advertising or publicity pertaining
12 to distribution of the software without specific, written prior
15 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
17 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
18 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
20 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
21 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
23 ****************************************************************/
25 const char *version = "version 20210724";
36 extern char **environ;
40 Awkfloat srand_seed = 1;
41 char *cmdname; /* gets argv[0] for error messages */
42 extern FILE *yyin; /* lex input file */
43 char *lexprog; /* points to program argument if it exists */
44 extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
45 enum compile_states compile_time = ERROR_PRINTING;
47 static char **pfile; /* program filenames from -f's */
48 static size_t maxpfile; /* max program filename */
49 static size_t npfile; /* number of filenames */
50 static size_t curpfile; /* current filename */
52 bool safe = false; /* true => "safe" mode */
54 static noreturn void fpecatch(int n
56 , siginfo_t *si, void *uc
61 static const char *emsg[] = {
62 [0] = "Unknown error",
63 [FPE_INTDIV] = "Integer divide by zero",
64 [FPE_INTOVF] = "Integer overflow",
65 [FPE_FLTDIV] = "Floating point divide by zero",
66 [FPE_FLTOVF] = "Floating point overflow",
67 [FPE_FLTUND] = "Floating point underflow",
68 [FPE_FLTRES] = "Floating point inexact result",
69 [FPE_FLTINV] = "Invalid Floating point operation",
70 [FPE_FLTSUB] = "Subscript out of range",
73 FATAL("floating point exception"
75 ": %s", (size_t)si->si_code < sizeof(emsg) / sizeof(emsg[0]) &&
76 emsg[si->si_code] ? emsg[si->si_code] : emsg[0]
81 /* Can this work with recursive calls? I don't think so.
84 FATAL("segfault. Do you have an unbounded recursive call?", n);
92 if (p[0] == 't' && p[1] == '\0') {
93 WARNING("-Ft to imply tab separator is deprecated behavior.");
100 getarg(int *argc, char ***argv, const char *msg)
102 if ((*argv)[1][2] != '\0') { /* arg is -fsomething */
103 return &(*argv)[1][2];
104 } else { /* arg is -f something */
105 (*argc)--; (*argv)++;
112 int main(int argc, char *argv[])
114 const char *fs = NULL;
117 setlocale(LC_CTYPE, "");
118 setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */
122 "usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n",
129 sa.sa_sigaction = fpecatch;
130 sa.sa_flags = SA_SIGINFO;
131 sigemptyset(&sa.sa_mask);
132 (void)sigaction(SIGFPE, &sa, NULL);
135 (void)signal(SIGFPE, fpecatch);
137 /*signal(SIGSEGV, segvcatch); experiment */
139 /* Set and keep track of the random seed */
141 srandom((unsigned long) srand_seed);
144 symtab = makesymtab(NSYMTAB/NSYMTAB);
145 while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
146 if (strcmp(argv[1], "-version") == 0 || strcmp(argv[1], "--version") == 0) {
147 printf("awk %s\n", version);
150 if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
155 switch (argv[1][1]) {
157 if (strcmp(argv[1], "-safe") == 0)
160 case 'f': /* next argument is program filename */
161 fn = getarg(&argc, &argv, "no program filename");
162 if (npfile >= maxpfile) {
164 pfile = (char **) realloc(pfile, maxpfile * sizeof(*pfile));
166 FATAL("error allocating space for -f options");
168 pfile[npfile++] = fn;
170 case 'F': /* set field separator */
171 fs = setfs(getarg(&argc, &argv, "no field separator"));
173 case 'v': /* -v a=1 to be done NOW. one -v for each */
174 vn = getarg(&argc, &argv, "no variable name");
178 FATAL("invalid -v option argument: %s", vn);
181 dbg = atoi(&argv[1][2]);
184 printf("awk %s\n", version);
187 WARNING("unknown option %s ignored", argv[1]);
193 /* argv[1] is now the first argument */
194 if (npfile == 0) { /* no -f; first argument is program */
198 FATAL("no program given");
200 DPRINTF("program = |%s|\n", argv[1]);
207 compile_time = COMPILING;
208 argv[0] = cmdname; /* put prog name at front of arglist */
209 DPRINTF("argc=%d, argv[0]=%s\n", argc, argv[0]);
215 // Doing this would comply with POSIX, but is not compatible with
216 // other awks and with what most users expect. So comment it out.
217 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */
220 *FS = qstring(fs, '\0');
221 DPRINTF("errorflag=%d\n", errorflag);
222 if (errorflag == 0) {
223 compile_time = RUNNING;
230 int pgetc(void) /* get 1 character from awk program */
236 if (curpfile >= npfile)
238 if (strcmp(pfile[curpfile], "-") == 0)
240 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
241 FATAL("can't open file %s", pfile[curpfile]);
244 if ((c = getc(yyin)) != EOF)
253 char *cursource(void) /* current source file name */
256 return pfile[curpfile < npfile ? curpfile : curpfile - 1];