/**************************************************************** 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 20121220"; #if HAVE_NBTOOL_CONFIG_H #include "nbtool_config.h" #endif #define DEBUG #include #include #include #include #include #include #include "awk.h" #include "awkgram.h" extern char **environ; extern int nfields; int dbg = 0; unsigned int 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 */ int compile_time = 2; /* for error printing: */ /* 2 = cmdline, 1 = compile, 0 = running */ static char **pfile = NULL; /* program filenames from -f's */ static size_t maxpfile = 0; /* max program filenames */ static size_t npfile = 0; /* number of filenames */ static size_t curpfile = 0; /* current filename */ int safe = 0; /* 1 => "safe" mode */ static char * setfs(char *p) { #ifdef notdef /* wart: t=>\t */ if (p[0] == 't' && p[1] == 0) return "\t"; else #endif if (p[0] != 0) return p; return NULL; } __dead static void fpecatch(int n #ifdef SA_SIGINFO , siginfo_t *si, void *uc #endif ) { #ifdef SA_SIGINFO static const char *emsg[] = { "Unknown error", "Integer divide by zero", "Integer overflow", "Floating point divide by zero", "Floating point overflow", "Floating point underflow", "Floating point inexact result", "Invalid Floating point operation", "Subscript out of range", }; #endif FATAL("floating point exception" #ifdef SA_SIGINFO ": %s\n", emsg[si->si_code >= 1 && si->si_code <= 8 ? si->si_code : 0] #endif ); } int main(int argc, char *argv[]) { const char *fs = NULL; char *fn; setlocale(LC_ALL, ""); 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 /* Set and keep track of the random seed */ srand_seed = 1; srand(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); exit(0); break; } if (strncmp(argv[1], "--", 2) == 0) { /* explicit end of args */ argc--; argv++; break; } switch (argv[1][1]) { case 's': if (strcmp(argv[1], "-safe") == 0) safe = 1; break; case 'f': /* next argument is program filename */ if (argv[1][2] != 0) /* arg is -fsomething */ fn = &argv[1][2]; else { argc--; argv++; if (argc <= 1) FATAL("no program filename"); fn = argv[1]; } 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 */ if (argv[1][2] != 0) { /* arg is -Fsomething */ fs = setfs(argv[1] + 2); } else { /* arg is -F something */ argc--; argv++; if (argc > 1) fs = setfs(argv[1]); } if (fs == NULL || *fs == '\0') WARNING("field separator FS is empty"); break; case 'v': /* -v a=1 to be done NOW. one -v for each */ if (argv[1][2] != 0) { /* arg is -vsomething */ if (isclvar(&argv[1][2])) setclvar(&argv[1][2]); else FATAL("invalid -v option argument: %s", &argv[1][2]); } else { /* arg is -v something */ argc--; argv++; if (argc <= 1) FATAL("no variable name"); if (isclvar(argv[1])) setclvar(argv[1]); else FATAL("invalid -v option argument: %s", argv[1]); } 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 = 1; 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 (fs) *FS = qstring(fs, '\0'); dprintf( ("errorflag=%d\n", errorflag) ); if (errorflag == 0) { compile_time = 0; 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; }