/* $OpenBSD: rpc_main.c,v 1.28 2014/11/18 20:54:28 krw Exp $ */ /* $NetBSD: rpc_main.c,v 1.9 1996/02/19 11:12:43 pk Exp $ */ /* * Copyright (c) 2010, Oracle America, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * Neither the name of the "Oracle America, Inc." nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * rpc_main.c, Top level of the RPC protocol compiler. */ #define RPCGEN_VERSION "199506"/* This program's version (year & month) */ #include #include #include #include #include #include #include #include #include #include "rpc_parse.h" #include "rpc_util.h" #include "rpc_scan.h" #define EXTEND 1 /* alias for TRUE */ #define DONT_EXTEND 0 /* alias for FALSE */ #define SVR4_CPP "/usr/ccs/lib/cpp" #define SUNOS_CPP "/lib/cpp" static int cppDefined = 0; /* explicit path for C preprocessor */ struct commandline { int cflag; /* xdr C routines */ int hflag; /* header file */ int lflag; /* client side stubs */ int mflag; /* server side stubs */ int nflag; /* netid flag */ int sflag; /* server stubs for the given transport */ int tflag; /* dispatch Table file */ int Ssflag; /* produce server sample code */ int Scflag; /* produce client sample code */ char *infile; /* input module name */ char *outfile;/* output module name */ }; static char *cmdname; static char *svcclosetime = "120"; static char *CPP = "/usr/bin/cpp"; static char CPPFLAGS[] = "-C"; static char pathbuf[MAXPATHLEN]; static char *allv[] = { "rpcgen", "-s", "udp", "-s", "tcp", }; static int allc = sizeof(allv) / sizeof(allv[0]); static char *allnv[] = { "rpcgen", "-s", "netpath", }; static int allnc = sizeof(allnv) / sizeof(allnv[0]); #define ARGLISTLEN 20 #define FIXEDARGS 2 static char *arglist[ARGLISTLEN]; static int argcount = FIXEDARGS; int nonfatalerrors; /* errors */ int inetdflag /* = 1 */ ; /* Support for inetd *//* is now the * default */ int pmflag; /* Support for port monitors */ int logflag; /* Use syslog instead of fprintf for errors */ int tblflag; /* Support for dispatch table file */ int callerflag; /* Generate svc_caller() function */ #define INLINE 3 /* length at which to start doing an inline */ int doinline = INLINE; /* length at which to start doing an * inline. 3 = default if 0, no * xdr_inline code */ int indefinitewait; /* If started by port monitors, hang till it * wants */ int exitnow; /* If started by port monitors, exit after * the call */ int timerflag; /* TRUE if !indefinite && !exitnow */ int newstyle; /* newstyle of passing arguments (by value) */ int Cflag = 0; /* ANSI C syntax */ static int allfiles; /* generate all files */ int tirpcflag = 0; /* generating code for tirpc, by default */ static void c_output(char *, char *, int, char *); static void h_output(char *, char *, int, char *); static void s_output(int, char **, char *, char *, int, char *, int, int); static void l_output(char *, char *, int, char *); static void t_output(char *, char *, int, char *); static void svc_output(char *, char *, int, char *); static void clnt_output(char *, char *, int, char *); static int do_registers(int, char **); static void addarg(char *); static void putarg(int, char *); static void clear_args(void); static void checkfiles(char *, char *); static int parseargs(int, char **, struct commandline *); static void usage(void); void c_initialize(void); int main(int argc, char *argv[]) { struct commandline cmd; (void) memset((char *) &cmd, 0, sizeof(struct commandline)); clear_args(); if (!parseargs(argc, argv, &cmd)) usage(); if (cmd.cflag || cmd.hflag || cmd.lflag || cmd.tflag || cmd.sflag || cmd.mflag || cmd.nflag || cmd.Ssflag || cmd.Scflag) { checkfiles(cmd.infile, cmd.outfile); } else checkfiles(cmd.infile, NULL); if (cmd.cflag) { c_output(cmd.infile, "-DRPC_XDR", DONT_EXTEND, cmd.outfile); } else if (cmd.hflag) { h_output(cmd.infile, "-DRPC_HDR", DONT_EXTEND, cmd.outfile); } else if (cmd.lflag) { l_output(cmd.infile, "-DRPC_CLNT", DONT_EXTEND, cmd.outfile); } else if (cmd.sflag || cmd.mflag || (cmd.nflag)) { s_output(argc, argv, cmd.infile, "-DRPC_SVC", DONT_EXTEND, cmd.outfile, cmd.mflag, cmd.nflag); } else if (cmd.tflag) { t_output(cmd.infile, "-DRPC_TBL", DONT_EXTEND, cmd.outfile); } else if (cmd.Ssflag) { svc_output(cmd.infile, "-DRPC_SERVER", DONT_EXTEND, cmd.outfile); } else if (cmd.Scflag) { clnt_output(cmd.infile, "-DRPC_CLIENT", DONT_EXTEND, cmd.outfile); } else { /* the rescans are required, since cpp may effect input */ c_output(cmd.infile, "-DRPC_XDR", EXTEND, "_xdr.c"); reinitialize(); h_output(cmd.infile, "-DRPC_HDR", EXTEND, ".h"); reinitialize(); l_output(cmd.infile, "-DRPC_CLNT", EXTEND, "_clnt.c"); reinitialize(); if (inetdflag || !tirpcflag) s_output(allc, allv, cmd.infile, "-DRPC_SVC", EXTEND, "_svc.c", cmd.mflag, cmd.nflag); else s_output(allnc, allnv, cmd.infile, "-DRPC_SVC", EXTEND, "_svc.c", cmd.mflag, cmd.nflag); if (tblflag) { reinitialize(); t_output(cmd.infile, "-DRPC_TBL", EXTEND, "_tbl.i"); } if (allfiles) { reinitialize(); svc_output(cmd.infile, "-DRPC_SERVER", EXTEND, "_server.c"); } if (allfiles) { reinitialize(); clnt_output(cmd.infile, "-DRPC_CLIENT", EXTEND, "_client.c"); } } exit(nonfatalerrors); /* NOTREACHED */ } /* * add extension to filename */ static char * extendfile(char *path, char *ext) { char *file; char *res; char *p; size_t len; if ((file = strrchr(path, '/')) == NULL) file = path; else file++; len = strlen(file) + strlen(ext) + 1; res = alloc(len); if (res == NULL) { fprintf(stderr, "could not allocate memory\n"); exit(1); } p = strrchr(file, '.'); if (p == NULL) p = file + strlen(file); (void) strlcpy(res, file, len); (void) strlcpy(res + (p - file), ext, len - (p - file)); return (res); } /* * Open output file with given extension */ static void open_output(char *infile, char *outfile) { if (outfile == NULL) { fout = stdout; return; } if (infile != NULL && streq(outfile, infile)) { fprintf(stderr, "%s: output would overwrite %s\n", cmdname, infile); crash(); } fout = fopen(outfile, "w"); if (fout == NULL) { fprintf(stderr, "%s: unable to open ", cmdname); perror(outfile); crash(); } record_open(outfile); } static void add_warning(void) { fprintf(fout, "/*\n"); fprintf(fout, " * Please do not edit this file.\n"); fprintf(fout, " * It was generated using rpcgen.\n"); fprintf(fout, " */\n\n"); } /* clear list of arguments */ static void clear_args(void) { int i; for (i = FIXEDARGS; i < ARGLISTLEN; i++) arglist[i] = NULL; argcount = FIXEDARGS; } /* make sure that a CPP exists */ static void find_cpp(void) { struct stat buf; /* SVR4 or explicit cpp does not exist */ if (stat(CPP, &buf) < 0) { if (cppDefined) { fprintf(stderr, "cannot find C preprocessor: %s \n", CPP); crash(); } else { /* try the other one */ CPP = SUNOS_CPP; if (stat(CPP, &buf) < 0) { /* can't find any cpp */ fprintf(stderr, "cannot find any C preprocessor: %s\n", CPP); crash(); } } } } /* * Open input file with given define for C-preprocessor */ static void open_input(char *infile, char *define) { int pd[2]; infilename = (infile == NULL) ? "" : infile; (void) pipe(pd); switch (fork()) { case 0: find_cpp(); putarg(0, CPP); putarg(1, CPPFLAGS); addarg(define); addarg(infile); addarg((char *) NULL); (void) close(1); (void) dup2(pd[1], 1); (void) close(pd[0]); execv(arglist[0], arglist); perror("execv"); exit(1); case -1: perror("fork"); exit(1); } (void) close(pd[1]); fin = fdopen(pd[0], "r"); if (fin == NULL) { fprintf(stderr, "%s: ", cmdname); perror(infilename); crash(); } } /* valid tirpc nettypes */ static char *valid_ti_nettypes[] = { "netpath", "visible", "circuit_v", "datagram_v", "circuit_n", "datagram_n", "udp", "tcp", "raw", NULL }; /* valid inetd nettypes */ static char *valid_i_nettypes[] = { "udp", "tcp", NULL }; static int check_nettype(char *name, char *list_to_check[]) { int i; for (i = 0; list_to_check[i] != NULL; i++) { if (strcmp(name, list_to_check[i]) == 0) return 1; } fprintf(stderr, "illegal nettype :\'%s\'\n", name); return 0; } /* * Compile into an XDR routine output file */ static void c_output(infile, define, extend, outfile) char *infile; char *define; int extend; char *outfile; { definition *def; char *include; char *outfilename; long tell; c_initialize(); open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; open_output(infile, outfilename); add_warning(); if (infile && (include = extendfile(infile, ".h"))) { fprintf(fout, "#include \"%s\"\n", include); free(include); /* .h file already contains rpc/rpc.h */ } else fprintf(fout, "#include \n"); tell = ftell(fout); while ((def = get_definition())) { emit(def); } if (extend && tell == ftell(fout)) { (void) unlink(outfilename); } } void c_initialize(void) { /* add all the starting basic types */ add_type(1, "int"); add_type(1, "long"); add_type(1, "short"); add_type(1, "bool"); add_type(1, "u_int"); add_type(1, "u_long"); add_type(1, "u_short"); } static const char rpcgen_table_dcl[] = "struct rpcgen_table {\n\ char *(*proc)();\n\ xdrproc_t xdr_arg;\n\ unsigned int len_arg;\n\ xdrproc_t xdr_res;\n\ unsigned int len_res;\n\ };\n"; static char * generate_guard(char *pathname) { char *filename, *guard, *tmp, *tmp2; filename = strrchr(pathname, '/'); /* find last component */ filename = ((filename == 0) ? pathname : filename + 1); guard = strdup(filename); if (guard == NULL) { fprintf(stderr, "out of memory while processing %s\n", filename); crash(); } /* convert to upper case */ tmp = guard; while (*tmp) { if (islower((unsigned char)*tmp)) *tmp = toupper((unsigned char)*tmp); tmp++; } tmp2 = extendfile(guard, "_H_RPCGEN"); free(guard); guard = tmp2; return (guard); } /* * Compile into an XDR header file */ static void h_output(infile, define, extend, outfile) char *infile; char *define; int extend; char *outfile; { definition *def; char *outfilename; long tell; char *guard; list *l; open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; open_output(infile, outfilename); add_warning(); guard = generate_guard(outfilename ? outfilename : infile); fprintf(fout, "#ifndef _%s\n#define _%s\n\n", guard, guard); fprintf(fout, "#define RPCGEN_VERSION\t%s\n\n", RPCGEN_VERSION); fprintf(fout, "#include \n\n"); tell = ftell(fout); /* print data definitions */ while ((def = get_definition())) { print_datadef(def); } /* * print function declarations. Do this after data definitions * because they might be used as arguments for functions */ for (l = defined; l != NULL; l = l->next) { print_funcdef(l->val); } if (extend && tell == ftell(fout)) { (void) unlink(outfilename); } else if (tblflag) { fprintf(fout, rpcgen_table_dcl); } fprintf(fout, "\n#endif /* !_%s */\n", guard); free(guard); } /* * Compile into an RPC service */ static void s_output(argc, argv, infile, define, extend, outfile, nomain, netflag) int argc; char *argv[]; char *infile; char *define; int extend; char *outfile; int nomain; int netflag; { char *include; definition *def; int foundprogram = 0; char *outfilename; open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; open_output(infile, outfilename); add_warning(); if (infile && (include = extendfile(infile, ".h"))) { fprintf(fout, "#include \"%s\"\n", include); free(include); } else fprintf(fout, "#include \n"); fprintf(fout, "#include \n"); fprintf(fout, "#include \n"); fprintf(fout, "#include /* getenv, exit */\n"); if (Cflag) { fprintf(fout, "#include /* for pmap_unset */\n"); fprintf(fout, "#include /* strcmp */ \n"); } fprintf(fout, "#include \n"); /* evas */ if (strcmp(svcclosetime, "-1") == 0) indefinitewait = 1; else if (strcmp(svcclosetime, "0") == 0) exitnow = 1; else if (inetdflag || pmflag) { fprintf(fout, "#include \n"); timerflag = 1; } if (!tirpcflag && inetdflag) fprintf(fout, "#include /* TIOCNOTTY */\n"); if (Cflag && (inetdflag || pmflag)) { fprintf(fout, "#ifdef __cplusplus\n"); fprintf(fout, "#include /* getdtablesize, open */\n"); fprintf(fout, "#endif /* __cplusplus */\n"); if (tirpcflag) fprintf(fout, "#include /* setsid */\n"); } if (tirpcflag) fprintf(fout, "#include \n"); fprintf(fout, "#include \n"); if (tirpcflag) fprintf(fout, "#include \n"); if (inetdflag || !tirpcflag) { fprintf(fout, "#include \n"); fprintf(fout, "#include \n"); } if ((netflag || pmflag) && tirpcflag) { fprintf(fout, "#include \n"); } if (/* timerflag && */ tirpcflag) fprintf(fout, "#include /* rlimit */\n"); if (logflag || inetdflag || pmflag) { fprintf(fout, "#include \n"); fprintf(fout, "#include \n"); } /* for ANSI-C */ fprintf(fout, "\n#ifdef __STDC__\n#define SIG_PF void(*)(int)\n#endif\n"); fprintf(fout, "\n#ifdef DEBUG\n#define RPC_SVC_FG\n#endif\n"); if (timerflag) fprintf(fout, "\n#define _RPCSVC_CLOSEDOWN %s\n", svcclosetime); while ((def = get_definition())) { foundprogram |= (def->def_kind == DEF_PROGRAM); } if (extend && !foundprogram) { (void) unlink(outfilename); return; } if (callerflag) /* EVAS */ fprintf(fout, "\nstatic SVCXPRT *caller;\n"); /* EVAS */ write_most(infile, netflag, nomain); if (!nomain) { if (!do_registers(argc, argv)) { if (outfilename) (void) unlink(outfilename); usage(); } write_rest(); } } /* * generate client side stubs */ static void l_output(infile, define, extend, outfile) char *infile; char *define; int extend; char *outfile; { char *include; definition *def; int foundprogram = 0; char *outfilename; open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; open_output(infile, outfilename); add_warning(); if (Cflag) fprintf(fout, "#include /* for memset */\n"); if (infile && (include = extendfile(infile, ".h"))) { fprintf(fout, "#include \"%s\"\n", include); free(include); } else fprintf(fout, "#include \n"); while ((def = get_definition())) foundprogram |= (def->def_kind == DEF_PROGRAM); if (extend && !foundprogram) { (void) unlink(outfilename); return; } write_stubs(); } /* * generate the dispatch table */ static void t_output(infile, define, extend, outfile) char *infile; char *define; int extend; char *outfile; { definition *def; int foundprogram = 0; char *outfilename; open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; open_output(infile, outfilename); add_warning(); while ((def = get_definition())) foundprogram |= (def->def_kind == DEF_PROGRAM); if (extend && !foundprogram) { (void) unlink(outfilename); return; } write_tables(); } /* sample routine for the server template */ static void svc_output(infile, define, extend, outfile) char *infile; char *define; int extend; char *outfile; { definition *def; char *include; char *outfilename; long tell; open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; checkfiles(infile, outfilename); /* check if outfile already * exists. if so, print an * error message and exit */ open_output(infile, outfilename); add_sample_msg(); if (infile && (include = extendfile(infile, ".h"))) { fprintf(fout, "#include \"%s\"\n", include); free(include); } else fprintf(fout, "#include \n"); tell = ftell(fout); while ((def = get_definition())) write_sample_svc(def); if (extend && tell == ftell(fout)) (void) unlink(outfilename); } /* sample main routine for client */ static void clnt_output(infile, define, extend, outfile) char *infile; char *define; int extend; char *outfile; { definition *def; char *include, *outfilename; long tell; int has_program = 0; open_input(infile, define); outfilename = extend ? extendfile(infile, outfile) : outfile; /* * check if outfile already exists. if so, * print an error message and exit */ checkfiles(infile, outfilename); open_output(infile, outfilename); add_sample_msg(); if (infile && (include = extendfile(infile, ".h"))) { fprintf(fout, "#include \"%s\"\n", include); free(include); } else fprintf(fout, "#include \n"); tell = ftell(fout); while ((def = get_definition())) has_program += write_sample_clnt(def); if (has_program) write_sample_clnt_main(); if (extend && tell == ftell(fout)) (void) unlink(outfilename); } /* * Perform registrations for service output * Return 0 if failed; 1 otherwise. */ static int do_registers(argc, argv) int argc; char *argv[]; { int i; if (inetdflag || !tirpcflag) { for (i = 1; i < argc; i++) { if (streq(argv[i], "-s")) { if (!check_nettype(argv[i + 1], valid_i_nettypes)) return 0; write_inetd_register(argv[i + 1]); i++; } } } else { for (i = 1; i < argc; i++) if (streq(argv[i], "-s")) { if (!check_nettype(argv[i + 1], valid_ti_nettypes)) return 0; write_nettype_register(argv[i + 1]); i++; } else if (streq(argv[i], "-n")) { write_netid_register(argv[i + 1]); i++; } } return 1; } /* * Add another argument to the arg list */ static void addarg(cp) char *cp; { if (argcount >= ARGLISTLEN) { fprintf(stderr, "rpcgen: too many defines\n"); crash(); /* NOTREACHED */ } arglist[argcount++] = cp; } static void putarg(where, cp) char *cp; int where; { if (where >= ARGLISTLEN) { fprintf(stderr, "rpcgen: arglist coding error\n"); crash(); /* NOTREACHED */ } arglist[where] = cp; } /* * if input file is stdin and an output file is specified then complain * if the file already exists. Otherwise the file may get overwritten * If input file does not exist, exit with an error */ static void checkfiles(infile, outfile) char *infile; char *outfile; { struct stat buf; if (infile) /* infile ! = NULL */ if (stat(infile, &buf) < 0) { perror(infile); crash(); } #if 0 if (outfile) { if (stat(outfile, &buf) < 0) return; /* file does not exist */ else { fprintf(stderr, "file '%s' already exists and may be overwritten\n", outfile); crash(); } } #endif } /* * Parse command line arguments */ static int parseargs(argc, argv, cmd) int argc; char *argv[]; struct commandline *cmd; { int i, j, nflags; char c, flag[(1 << 8 * sizeof(char))]; cmdname = argv[0]; cmd->infile = cmd->outfile = NULL; if (argc < 2) return (0); allfiles = 0; flag['c'] = 0; flag['h'] = 0; flag['l'] = 0; flag['m'] = 0; flag['o'] = 0; flag['s'] = 0; flag['n'] = 0; flag['t'] = 0; flag['S'] = 0; flag['C'] = 0; for (i = 1; i < argc; i++) { if (argv[i][0] != '-') { if (cmd->infile) { fprintf(stderr, "Cannot specify more than one input file!\n"); return (0); } cmd->infile = argv[i]; } else { for (j = 1; argv[i][j] != 0; j++) { c = argv[i][j]; switch (c) { case 'A': callerflag = 1; break; case 'a': allfiles = 1; break; case 'c': case 'h': case 'l': case 'm': case 't': if (flag[(unsigned char)c]) return (0); flag[(unsigned char)c] = 1; break; case 'S': /* * sample flag: Ss or Sc. Ss means * set flag['S']; Sc means set * flag['C']; */ c = argv[i][++j]; /* get next char */ if (c == 's') c = 'S'; else if (c == 'c') c = 'C'; else return (0); if (flag[(unsigned char)c]) return (0); flag[(unsigned char)c] = 1; break; case 'C': /* ANSI C syntax */ Cflag = 1; break; case 'b': /* * turn TIRPC flag off for * generating backward compatible */ tirpcflag = 0; break; case 'I': inetdflag = 1; break; case 'N': newstyle = 1; break; case 'L': logflag = 1; break; case 'K': if (++i == argc) return (0); svcclosetime = argv[i]; goto nextarg; case 'T': tblflag = 1; break; case 'i': if (++i == argc) return (0); doinline = atoi(argv[i]); goto nextarg; case 'n': case 'o': case 's': if (argv[i][j - 1] != '-' || argv[i][j + 1] != 0) return (0); flag[(unsigned char)c] = 1; if (++i == argc) return (0); if (c == 's') { if (!streq(argv[i], "udp") && !streq(argv[i], "tcp")) return (0); } else if (c == 'o') { if (cmd->outfile) return (0); cmd->outfile = argv[i]; } goto nextarg; case 'D': if (argv[i][j - 1] != '-') return (0); (void) addarg(argv[i]); goto nextarg; case 'Y': if (++i == argc) return (0); if (snprintf(pathbuf, sizeof pathbuf, "%s/cpp", argv[i]) >= sizeof pathbuf) usage(); CPP = pathbuf; cppDefined = 1; goto nextarg; default: return (0); } } nextarg: ; } } cmd->cflag = flag['c']; cmd->hflag = flag['h']; cmd->lflag = flag['l']; cmd->mflag = flag['m']; cmd->nflag = flag['n']; cmd->sflag = flag['s']; cmd->tflag = flag['t']; cmd->Ssflag = flag['S']; cmd->Scflag = flag['C']; if (tirpcflag) { pmflag = inetdflag ? 0 : 1; /* pmflag or inetdflag is * always TRUE */ if (inetdflag && cmd->nflag) { /* netid not allowed with inetdflag */ fprintf(stderr, "Cannot use netid flag with inetd flag!\n"); return (0); } } else { /* 4.1 mode */ pmflag = 0; /* set pmflag only in tirpcmode */ inetdflag = 1; /* inetdflag is TRUE by default */ if (cmd->nflag) { /* netid needs TIRPC */ fprintf(stderr, "Cannot use netid flag without TIRPC!\n"); return (0); } } if (newstyle && (tblflag || cmd->tflag)) { fprintf(stderr, "Cannot use table flags with newstyle!\n"); return (0); } /* check no conflicts with file generation flags */ nflags = cmd->cflag + cmd->hflag + cmd->lflag + cmd->mflag + cmd->sflag + cmd->nflag + cmd->tflag + cmd->Ssflag + cmd->Scflag; if (nflags == 0) { if (cmd->outfile != NULL || cmd->infile == NULL) return (0); } else if (nflags > 1) { fprintf(stderr, "Cannot have more than one file generation flag!\n"); return (0); } return (1); } static void usage(void) { fprintf(stderr, "usage: %s [-abACILNT] [-Dname[=value]] [-i lines] " "[-K seconds] infile\n", cmdname); fprintf(stderr, " %s [-c | -h | -l | -m | -t | -Sc | -Ss] " "[-o outfile] [infile]\n", cmdname); fprintf(stderr, " %s [-s nettype]* [-o outfile] [infile]\n", cmdname); exit(1); }