usr.bin/xlint/lint1/err.c

   1 /*      $NetBSD: err.c,v 1.8 1995/10/02 17:37:00 jpo Exp $      */
   2
   3 /*
   4  * Copyright (c) 1994, 1995 Jochen Pohl
   5  * All Rights Reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Jochen Pohl for
  18  *      The NetBSD Project.
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  * $NetBSD: err.c,v 1.8 1995/10/02 17:37:00 jpo Exp $
  34  * $DragonFly: src/usr.bin/xlint/lint1/err.c,v 1.7 2008/04/20 13:44:26 swildner Exp $
  35  */
  36
  37 /* number of errors found */
  38 int     nerr;
  39
  40 /* number of syntax errors */
  41 int     sytxerr;
  42
  43 #include <stdlib.h>
  44 #include <stdarg.h>
  45
  46 #include "lint1.h"
  47
  48 static  const   char *basename(const char *);
  49 static  void    verror(int, va_list);
  50 static  void    vwarning(int, va_list);
  51
  52
  53 const   char *msgs[] = {
  54         "syntax error: empty declaration",                            /* 0 */
  55         "old style declaration; add int",                             /* 1 */
  56         "empty declaration",                                          /* 2 */
  57         "%s declared in argument declaration list",                   /* 3 */
  58         "illegal type combination",                                   /* 4 */
  59         "modifying typedef with '%s'; only qualifiers allowed",       /* 5 */
  60         "use 'double' instead of 'long float'",                       /* 6 */
  61         "only one storage class allowed",                             /* 7 */
  62         "illegal storage class",                                      /* 8 */
  63         "only register valid as formal parameter storage class",      /* 9 */
  64         "duplicate '%s'",                                             /* 10 */
  65         "bit-field initializer out of range",                         /* 11 */
  66         "compiler takes size of function",                            /* 12 */
  67         "incomplete enum type: %s",                                   /* 13 */
  68         "compiler takes alignment of function",                       /* 14 */
  69         "function returns illegal type",                              /* 15 */
  70         "array of function is illegal",                               /* 16 */
  71         "null dimension",                                             /* 17 */
  72         "illegal use of 'void'",                                      /* 18 */
  73         "void type for %s",                                           /* 19 */
  74         "zero or negative array dimension",                           /* 20 */
  75         "redeclaration of formal parameter %s",                       /* 21 */
  76         "incomplete or misplaced function definition",                /* 22 */
  77         "undefined label %s",                                         /* 23 */
  78         "cannot initialize function: %s",                             /* 24 */
  79         "cannot initialize typedef: %s",                              /* 25 */
  80         "cannot initialize extern declaration: %s",                   /* 26 */
  81         "redeclaration of %s",                                        /* 27 */
  82         "redefinition of %s",                                         /* 28 */
  83         "previously declared extern, becomes static: %s",             /* 29 */
  84         "redeclaration of %s; ANSI C requires static",                /* 30 */
  85         "incomplete structure or union %s: %s",                       /* 31 */
  86         "argument type defaults to 'int': %s",                        /* 32 */
  87         "duplicate member name: %s",                                  /* 33 */
  88         "nonportable bit-field type",                                 /* 34 */
  89         "illegal bit-field type",                                     /* 35 */
  90         "illegal bit-field size",                                     /* 36 */
  91         "zero size bit-field",                                        /* 37 */
  92         "function illegal in structure or union",                     /* 38 */
  93         "illegal zero sized structure member: %s",                    /* 39 */
  94         "unknown size: %s",                                           /* 40 */
  95         "illegal use of bit-field",                                   /* 41 */
  96         "forward reference to enum type",                             /* 42 */
  97         "redefinition hides earlier one: %s",                         /* 43 */
  98         "declaration introduces new type in ANSI C: %s %s",           /* 44 */
  99         "base type is really '%s %s'",                                /* 45 */
 100         "(%s) tag redeclared",                                        /* 46 */
 101         "zero sized %s",                                              /* 47 */
 102         "overflow in enumeration values: %s",                         /* 48 */
 103         "struct or union member must be named",                       /* 49 */
 104         "a function is declared as an argument: %s",                  /* 50 */
 105         "parameter mismatch: %d declared, %d defined",                /* 51 */
 106         "cannot initialize parameter: %s",                            /* 52 */
 107         "declared argument %s is missing",                            /* 53 */
 108         "trailing ',' prohibited in enum declaration",                /* 54 */
 109         "integral constant expression expected",                      /* 55 */
 110         "integral constant too large",                                /* 56 */
 111         "enumeration constant hides parameter: %s",                   /* 57 */
 112         "type does not match prototype: %s",                          /* 58 */
 113         "formal parameter lacks name: param #%d",                     /* 59 */
 114         "void must be sole parameter",                                /* 60 */
 115         "void parameter cannot have name: %s",                        /* 61 */
 116         "function prototype parameters must have types",              /* 62 */
 117         "prototype does not match old-style definition",              /* 63 */
 118         "()-less function definition",                                /* 64 */
 119         "%s has no named members",                                    /* 65 */
 120         "syntax requires ';' after last struct/union member",         /* 66 */
 121         "cannot return incomplete type",                              /* 67 */
 122         "typedef already qualified with '%s'",                        /* 68 */
 123         "inappropriate qualifiers with 'void'",                       /* 69 */
 124         "%soperand of '%s' is unsigned in ANSI C",                    /* 70 */
 125         "too many characters in character constant",                  /* 71 */
 126         "typedef declares no type name",                              /* 72 */
 127         "empty character constant",                                   /* 73 */
 128         "no hex digits follow \\x",                                   /* 74 */
 129         "overflow in hex escape",                                     /* 75 */
 130         "character escape does not fit in character",                 /* 76 */
 131         "bad octal digit %c",                                         /* 77 */
 132         "nonportable character escape",                               /* 78 */
 133         "dubious escape \\%c",                                        /* 79 */
 134         "dubious escape \\%o",                                        /* 80 */
 135         "\\a undefined in traditional C",                             /* 81 */
 136         "\\x undefined in traditional C",                             /* 82 */
 137         "storage class after type is obsolescent",                    /* 83 */
 138         "ANSI C requires formal parameter before '...'",              /* 84 */
 139         "dubious tag declaration: %s %s",                             /* 85 */
 140         "automatic hides external declaration: %s",                   /* 86 */
 141         "static hides external declaration: %s",                      /* 87 */
 142         "typedef hides external declaration: %s",                     /* 88 */
 143         "typedef redeclared: %s",                                     /* 89 */
 144         "inconsistent redeclaration of extern: %s",                   /* 90 */
 145         "declaration hides parameter: %s",                            /* 91 */
 146         "inconsistent redeclaration of static: %s",                   /* 92 */
 147         "dubious static function at block level: %s",                 /* 93 */
 148         "function has illegal storage class: %s",                     /* 94 */
 149         "declaration hides earlier one: %s",                          /* 95 */
 150         "cannot dereference non-pointer type",                        /* 96 */
 151         "suffix U is illegal in traditional C",                       /* 97 */
 152         "suffixes F and L are illegal in traditional C",              /* 98 */
 153         "%s undefined",                                               /* 99 */
 154         "unary + is illegal in traditional C",                        /* 100 */
 155         "undefined struct/union member: %s",                          /* 101 */
 156         "illegal member use: %s",                                     /* 102 */
 157         "left operand of '.' must be struct/union object",            /* 103 */
 158         "left operand of '->' must be pointer to struct/union",       /* 104 */
 159         "non-unique member requires struct/union %s",                 /* 105 */
 160         "left operand of '->' must be pointer",                       /* 106 */
 161         "operands of '%s' have incompatible types",                   /* 107 */
 162         "operand of '%s' has incompatible type",                      /* 108 */
 163         "void type illegal in expression",                            /* 109 */
 164         "pointer to function is not allowed here",                    /* 110 */
 165         "unacceptable operand of '%s'",                               /* 111 */
 166         "cannot take address of bit-field",                           /* 112 */
 167         "cannot take address of register %s",                         /* 113 */
 168         "%soperand of '%s' must be lvalue",                           /* 114 */
 169         "%soperand of '%s' must be modifiable lvalue",                /* 115 */
 170         "illegal pointer subtraction",                                /* 116 */
 171         "bitwise operation on signed value possibly nonportable",     /* 117 */
 172         "semantics of '%s' change in ANSI C; use explicit cast",      /* 118 */
 173         "conversion of '%s' to '%s' is out of range",                 /* 119 */
 174         "bitwise operation on signed value nonportable",              /* 120 */
 175         "negative shift",                                             /* 121 */
 176         "shift greater than size of object",                          /* 122 */
 177         "illegal combination of pointer and integer, op %s",          /* 123 */
 178         "illegal pointer combination, op %s",                         /* 124 */
 179         "ANSI C forbids ordered comparisons of pointers to functions",/* 125 */
 180         "incompatible types in conditional",                          /* 126 */
 181         "'&' before array or function: ignored",                      /* 127 */
 182         "operands have incompatible pointer types, op %s",            /* 128 */
 183         "expression has null effect",                                 /* 129 */
 184         "enum type mismatch, op %s",                                  /* 130 */
 185         "conversion to '%s' may sign-extend incorrectly",             /* 131 */
 186         "conversion from '%s' may lose accuracy",                     /* 132 */
 187         "conversion of pointer to '%s' loses bits",                   /* 133 */
 188         "conversion of pointer to '%s' may lose bits",                /* 134 */
 189         "possible pointer alignment problem",                         /* 135 */
 190         "cannot do pointer arithmetic on operand of unknown size",    /* 136 */
 191         "use of incomplete enum type, op %s",                         /* 137 */
 192         "unknown operand size, op %s",                                /* 138 */
 193         "division by 0",                                              /* 139 */
 194         "modulus by 0",                                               /* 140 */
 195         "integer overflow detected, op %s",                           /* 141 */
 196         "floating point overflow detected, op %s",                    /* 142 */
 197         "cannot take size of incomplete type",                        /* 143 */
 198         "cannot take size of function",                               /* 144 */
 199         "cannot take size of bit-field",                              /* 145 */
 200         "cannot take size of void",                                   /* 146 */
 201         "invalid cast expression",                                    /* 147 */
 202         "improper cast of void expression",                           /* 148 */
 203         "illegal function",                                           /* 149 */
 204         "argument mismatch: %d arg%s passed, %d expected",            /* 150 */
 205         "void expressions may not be arguments, arg #%d",             /* 151 */
 206         "argument cannot have unknown size, arg #%d",                 /* 152 */
 207         "argument has incompatible pointer type, arg #%d",            /* 153 */
 208         "illegal combination of pointer and integer, arg #%d",        /* 154 */
 209         "argument is incompatible with prototype, arg #%d",           /* 155 */
 210         "enum type mismatch, arg #%d",                                /* 156 */
 211         "ANSI C treats constant as unsigned",                         /* 157 */
 212         "%s may be used before set",                                  /* 158 */
 213         "assignment in conditional context",                          /* 159 */
 214         "operator '==' found where '=' was expected",                 /* 160 */
 215         "constant in conditional context",                            /* 161 */
 216         "comparison of %s with %s, op %s",                            /* 162 */
 217         "a cast does not yield an lvalue",                            /* 163 */
 218         "assignment of negative constant to unsigned type",           /* 164 */
 219         "constant truncated by assignment",                           /* 165 */
 220         "precision lost in bit-field assignment",                     /* 166 */
 221         "array subscript cannot be negative: %ld",                    /* 167 */
 222         "array subscript cannot be > %d: %ld",                        /* 168 */
 223         "precedence confusion possible: parenthesize!",               /* 169 */
 224         "first operand must have scalar type, op ? :",                /* 170 */
 225         "assignment type mismatch",                                   /* 171 */
 226         "too many struct/union initializers",                         /* 172 */
 227         "too many array initializers",                                /* 173 */
 228         "too many initializers",                                      /* 174 */
 229         "initialisation of an incomplete type",                       /* 175 */
 230         "invalid initializer",                                        /* 176 */
 231         "non-constant initializer",                                   /* 177 */
 232         "initializer does not fit",                                   /* 178 */
 233         "cannot initialize struct/union with no named member",        /* 179 */
 234         "bit-field initializer does not fit",                         /* 180 */
 235         "{}-enclosed initializer required",                           /* 181 */
 236         "incompatible pointer types",                                 /* 182 */
 237         "illegal combination of pointer and integer",                 /* 183 */
 238         "illegal pointer combination",                                /* 184 */
 239         "initialisation type mismatch",                               /* 185 */
 240         "bit-field initialisation is illegal in traditional C",       /* 186 */
 241         "non-null byte ignored in string initializer",                /* 187 */
 242         "no automatic aggregate initialization in traditional C",     /* 188 */
 243         "assignment of struct/union illegal in traditional C",        /* 189 */
 244         "empty array declaration: %s",                                /* 190 */
 245         "%s set but not used in function %s",                         /* 191 */
 246         "%s unused in function %s",                                   /* 192 */
 247         "statement not reached",                                      /* 193 */
 248         "label %s redefined",                                         /* 194 */
 249         "case not in switch",                                         /* 195 */
 250         "case label affected by conversion",                          /* 196 */
 251         "non-constant case expression",                               /* 197 */
 252         "non-integral case expression",                               /* 198 */
 253         "duplicate case in switch: %ld",                              /* 199 */
 254         "duplicate case in switch: %lu",                              /* 200 */
 255         "default outside switch",                                     /* 201 */
 256         "duplicate default in switch",                                /* 202 */
 257         "case label must be of type `int' in traditional C",          /* 203 */
 258         "controlling expressions must have scalar type",              /* 204 */
 259         "switch expression must have integral type",                  /* 205 */
 260         "enumeration value(s) not handled in switch",                 /* 206 */
 261         "loop not entered at top",                                    /* 207 */
 262         "break outside loop or switch",                               /* 208 */
 263         "continue outside loop",                                      /* 209 */
 264         "enum type mismatch in initialisation",                       /* 210 */
 265         "return value type mismatch",                                 /* 211 */
 266         "cannot return incomplete type",                              /* 212 */
 267         "void function %s cannot return value",                       /* 213 */
 268         "function %s expects to return value",                        /* 214 */
 269         "function implicitly declared to return int",                 /* 215 */
 270         "function %s has return (e); and return;",                    /* 216 */
 271         "function %s falls off bottom without returning value",       /* 217 */
 272         "ANSI C treats constant as unsigned, op %s",                  /* 218 */
 273         "concatenated strings are illegal in traditional C",          /* 219 */
 274         "fallthrough on case statement",                              /* 220 */
 275         "initialisation of unsigned with negative constant",          /* 221 */
 276         "conversion of negative constant to unsigned type",           /* 222 */
 277         "end-of-loop code not reached",                               /* 223 */
 278         "cannot recover from previous errors",                        /* 224 */
 279         "static function called but not defined: %s()",               /* 225 */
 280         "static variable %s unused",                                  /* 226 */
 281         "const object %s should have initializer",                    /* 227 */
 282         "function cannot return const or volatile object",            /* 228 */
 283         "questionable conversion of function pointer",                /* 229 */
 284         "nonportable character comparison, op %s",                    /* 230 */
 285         "argument %s unused in function %s",                          /* 231 */
 286         "label %s unused in function %s",                             /* 232 */
 287         "struct %s never defined",                                    /* 233 */
 288         "union %s never defined",                                     /* 234 */
 289         "enum %s never defined",                                      /* 235 */
 290         "static function %s unused",                                  /* 236 */
 291         "redeclaration of formal parameter %s",                       /* 237 */
 292         "initialisation of union is illegal in traditional C",        /* 238 */
 293         "constant argument to NOT",                                   /* 239 */
 294         "assignment of different structures",                         /* 240 */
 295         "dubious operation on enum, op %s",                           /* 241 */
 296         "combination of '%s' and '%s', op %s",                        /* 242 */
 297         "dubious comparison of enums, op %s",                         /* 243 */
 298         "illegal structure pointer combination",                      /* 244 */
 299         "illegal structure pointer combination, op %s",               /* 245 */
 300         "dubious conversion of enum to '%s'",                         /* 246 */
 301         "pointer casts may be troublesome",                           /* 247 */
 302         "floating-point constant out of range",                       /* 248 */
 303         "syntax error",                                               /* 249 */
 304         "unknown character \\%o",                                     /* 250 */
 305         "malformed integer constant",                                 /* 251 */
 306         "integer constant out of range",                              /* 252 */
 307         "unterminated character constant",                            /* 253 */
 308         "newline in string or char constant",                         /* 254 */
 309         "undefined or invalid # directive",                           /* 255 */
 310         "unterminated comment",                                       /* 256 */
 311         "extra characters in lint comment",                           /* 257 */
 312         "unterminated string constant",                               /* 258 */
 313         "conversion to '%s' due to prototype, arg #%d",               /* 259 */
 314         "previous declaration of %s",                                 /* 260 */
 315         "previous definition of %s",                                  /* 261 */
 316         "\\\" inside character constants undefined in traditional C", /* 262 */
 317         "\\? undefined in traditional C",                             /* 263 */
 318         "\\v undefined in traditional C",                             /* 264 */
 319         "%s C does not support 'long long'",                          /* 265 */
 320         "'long double' is illegal in traditional C",                  /* 266 */
 321         "shift equal to size of object",                              /* 267 */
 322         "variable declared inline: %s",                               /* 268 */
 323         "argument declared inline: %s",                               /* 269 */
 324         "function prototypes are illegal in traditional C",           /* 270 */
 325         "switch expression must be of type `int' in traditional C",   /* 271 */
 326         "empty translation unit",                                     /* 272 */
 327         "bit-field type '%s' invalid in ANSI C",                      /* 273 */
 328         "ANSI C forbids comparison of %s with %s",                    /* 274 */
 329         "cast discards 'const' from pointer target type",             /* 275 */
 330         "",                                                           /* 276 */
 331         "initialisation of '%s' with '%s'",                           /* 277 */
 332         "combination of '%s' and '%s', arg #%d",                      /* 278 */
 333         "combination of '%s' and '%s' in return",                     /* 279 */
 334         "must be outside function: /* %s */",                         /* 280 */
 335         "duplicate use of /* %s */",                                  /* 281 */
 336         "must precede function definition: /* %s */",                 /* 282 */
 337         "argument number mismatch with directive: /* %s */",          /* 283 */
 338         "fallthrough on default statement",                           /* 284 */
 339         "prototype declaration",                                      /* 285 */
 340         "function definition is not a prototype",                     /* 286 */
 341         "function declaration is not a prototype",                    /* 287 */
 342         "dubious use of /* VARARGS */ with /* %s */",                 /* 288 */
 343         "can't be used together: /* PRINTFLIKE */ /* SCANFLIKE */",   /* 289 */
 344         "static function %s declared but not defined",                /* 290 */
 345         "invalid multibyte character",                                /* 291 */
 346         "cannot concatenate wide and regular string literals",        /* 292 */
 347         "argument %d must be 'char *' for PRINTFLIKE/SCANFLIKE",      /* 293 */
 348         "multi-character character constant",                         /* 294 */
 349         "conversion of '%s' to '%s' is out of range, arg #%d",        /* 295 */
 350         "conversion of negative constant to unsigned type, arg #%d",  /* 296 */
 351         "conversion to '%s' may sign-extend incorrectly, arg #%d",    /* 297 */
 352         "conversion from '%s' may lose accuracy, arg #%d",            /* 298 */
 353         "prototype does not match old style definition, arg #%d",     /* 299 */
 354         "old style definition",                                       /* 300 */
 355         "array of incomplete type",                                   /* 301 */
 356         "%s returns pointer to automatic object",                     /* 302 */
 357         "ANSI C forbids conversion of %s to %s",                      /* 303 */
 358         "ANSI C forbids conversion of %s to %s, arg #%d",             /* 304 */
 359         "ANSI C forbids conversion of %s to %s, op %s",               /* 305 */
 360         "constant truncated by conversion, op %s",                    /* 306 */
 361         "static variable %s set but not used",                        /* 307 */
 362         "",                                                           /* 308 */
 363         "extra bits set to 0 in conversion of '%s' to '%s', op %s",   /* 309 */
 364 };
 365
 366 /*
 367  * If Fflag is not set basename() returns a pointer to the last
 368  * component of the path, otherwise it returns the argument.
 369  */
 370 static const char *
 371 basename(const char *path)
 372 {
 373         const   char *cp, *cp1, *cp2;
 374
 375         if (Fflag)
 376                 return (path);
 377
 378         cp = cp1 = cp2 = path;
 379         while (*cp != '\0') {
 380                 if (*cp++ == '/') {
 381                         cp2 = cp1;
 382                         cp1 = cp;
 383                 }
 384         }
 385         return (*cp1 == '\0' ? cp2 : cp1);
 386 }
 387
 388 static void
 389 verror(int n, va_list ap)
 390 {
 391         const   char *fn;
 392
 393         fn = basename(curr_pos.p_file);
 394         (void)printf("%s:%d: ", fn, curr_pos.p_line);
 395         (void)vprintf(msgs[n], ap);
 396         (void)printf("\n");
 397         nerr++;
 398 }
 399
 400 static void
 401 vwarning(int n, va_list ap)
 402 {
 403         const   char *fn;
 404
 405         if (nowarn)
 406                 /* this warning is suppressed by a LINTED comment */
 407                 return;
 408
 409         fn = basename(curr_pos.p_file);
 410         (void)printf("%s:%d: warning: ", fn, curr_pos.p_line);
 411         (void)vprintf(msgs[n], ap);
 412         (void)printf("\n");
 413 }
 414
 415 void
 416 error(int n, ...)
 417 {
 418         va_list ap;
 419
 420         va_start(ap, n);
 421         verror(n, ap);
 422         va_end(ap);
 423 }
 424
 425 void
 426 lerror(const char *msg, ...)
 427 {
 428         va_list ap;
 429         const   char *fn;
 430
 431         va_start(ap, msg);
 432         fn = basename(curr_pos.p_file);
 433         (void)fprintf(stderr, "%s:%d: lint error: ", fn, curr_pos.p_line);
 434         (void)vfprintf(stderr, msg, ap);
 435         (void)fprintf(stderr, "\n");
 436         va_end(ap);
 437         exit(1);
 438 }
 439
 440 void
 441 warning(int n, ...)
 442 {
 443         va_list ap;
 444
 445         va_start(ap, n);
 446         vwarning(n, ap);
 447         va_end(ap);
 448 }
 449
 450 void
 451 message(int n, ...)
 452 {
 453         va_list ap;
 454         const   char *fn;
 455
 456         va_start(ap, n);
 457         fn = basename(curr_pos.p_file);
 458         (void)printf("%s:%d: ", fn, curr_pos.p_line);
 459         (void)vprintf(msgs[n], ap);
 460         (void)printf("\n");
 461         va_end(ap);
 462 }
 463
 464 int
 465 gnuism(int n, ...)
 466 {
 467         va_list ap;
 468         int     msg;
 469
 470         va_start(ap, n);
 471         if (sflag && !gflag) {
 472                 verror(n, ap);
 473                 msg = 1;
 474         } else if (!sflag && gflag) {
 475                 msg = 0;
 476         } else {
 477                 vwarning(n, ap);
 478                 msg = 1;
 479         }
 480         va_end(ap);
 481
 482         return (msg);
 483 }