/* $XConsortium: main.c /main/82 1995/11/07 19:47:02 gildea $ */
/*
Copyright (c) 1993, 1994  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.

      22/08/99 APY   MSDOS builds (using gcc),
                        import INCLUDE
                        convert '\' to '/' for gmake happy output.
                     -M switch
      25/08/99 APY   Allow multiple -Y definitions
      11/02/04 APY   -b, basename option
      16/02/04       --help, v2.1
      28/04/04       -W[1|2], quote whitespace,
                     - MAX_PATH cleanup (formal buffers sized by BUFSIZ)
                     - v2.20
      03/11/04       - Multiple -p definitions.
                     - MAXDIRS=256    
      04/11/04       - Correctly handle an empty INCLUDE vararg.
                     - More advanced cmdfile processor (see argv).
                     - v2.21

 $Source: /cvsroot/device/DEVL/UTILS/MKDEPEND/main.c,v $
 $Revision: 1.6 $ $Date: 2004/11/04 07:11:36 $ $State: Exp $
 $Author: ayoung $ $Locker:  $

*/

#define VMAJOR          2
#define VMINOR          25

#include "def.h"
#ifdef hpux
#define sigvec sigvector
#endif /* hpux */

#ifdef X_POSIX_C_SOURCE
#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
#include <signal.h>
#undef _POSIX_C_SOURCE
#else
#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE)
#include <signal.h>
#else
#define _POSIX_SOURCE
#include <signal.h>
#undef _POSIX_SOURCE
#endif
#endif

#ifdef NeedVarargsPrototypes
#include <stdarg.h>
#endif

#ifdef DEBUG
int     _debugmask;
#endif

static const char *ProgramName, *ProgramPath;

const char *directives[] = {
        "if",                   /* 0  */
        "ifdef",                /* 1  */
        "ifndef",               /* 2  */
        "else",                 /* 3  */
        "endif",                /* 4  */
        "define",               /* 5  */
        "undef",                /* 6  */
        "include",              /* 7  */
        "line",                 /* 8  */
        "pragma",               /* 9  */
        "error",                /* 10 */
        "ident",                /* 11 */
        "sccs",                 /* 12 */
        "elif",                 /* 13 */
        "eject",                /* 14 */
        "warning",              /* 15 */
        NULL
};

#define MAKEDEPEND
#include "imakedep.h"           /* from config sources */
#undef  MAKEDEPEND
#ifdef  MSDOS
#include <libdos.h>
#endif

struct  inclist inclist[ MAXFILES ] = {0};
struct  inclist *inclistp = inclist;
struct  inclist maininclist;

char    *filelist[ MAXFILES ] = {0};
char    *includedirs[ MAXDIRS+1 ] = {0};
char    *defincdirs[ MAXDIRS+1 ] = {0};
char    **systemdirs = NULL;
char    *notdotdot[ MAXDIRS ] = {0};
char    *objprefixs[ MAXPREFIXS ] = {0};
char    *objsuffix = OBJSUFFIX;
char    *startat = "# DO NOT DELETE -- make depend depends on it.";
int     width = 78;
int     mflags = 0;
boolean append = FALSE;
boolean printed = FALSE;
boolean verbose = FALSE;
boolean opt_basename = FALSE;
int embeddedwhite = BS_UNKNOWN;
boolean show_where_not = FALSE;
boolean warn_multiple = FALSE;  /* Warn on multiple includes of same file */

static void usage(void);

static
#ifdef SIGNALRETURNSINT
int
#else
void
#endif
catch (int sig)
{
        fflush (stdout);
        fatalerr ("got signal %d\n", sig);
}

#if defined(USG) || (defined(i386) && defined(SYSV)) ||\
                defined(WIN32) || defined(MSDOS)
#define USGISH
#endif

#ifndef USGISH
#ifndef _POSIX_SOURCE
#define sigaction sigvec
#define sa_handler sv_handler
#define sa_mask sv_mask
#define sa_flags sv_flags
#endif
struct sigaction sig_act;
#endif /* USGISH */

#if defined(WIN32)
extern int
parse_cmdbuffer(const char *, const char *, char ***, int *);
#endif

main(argc, argv)
        int     argc;
        char    **argv;
{
        register char   **fp = filelist;
        register char   **incp = includedirs;
        register char   **defp = defincdirs;
        register char   **prefixp = objprefixs;

        register char   *p;
        register struct inclist *ip;
        char            *makefile = NULL;
        struct  filepointer *filecontent;
        struct  symtab  *psymp = predefs;
        char            *endmarker = NULL;

        ProgramName = strdup(argv[0]);
#if defined(WIN32) || defined(DOS)
        if ((p = strrchr(ProgramName, '/')) != NULL ||
                    (p = strrchr(ProgramName, '\\')) != NULL) {
                ProgramPath = ProgramName;
                *p++ = '\0';
                ProgramName = p;
        } else {
                ProgramPath = NULL;
                ProgramName = p;
        }     
        if ((p = strrchr(ProgramName, '.')) != NULL && !stricmp(p, ".exe"))
                *p = '\0';
#endif

        while (psymp->s_name)
        {
                define2(psymp->s_name, psymp->s_value, &maininclist);
                psymp++;
        }

#ifdef DEBUG
        if ((p = getenv("MKDEPENDDEBUG")) != NULL && *p) {
                _debugmask = strtol(p, NULL, 0);
        }
#endif

        if (argc == 2 && argv[1][0] == '@') {
                struct stat ast;
                int afd;
                char *args;
                char quotechar = '\0';
                char **nargv;
                int nargc;

                debug(1, ("importing: %s\n", argv[1]+1));

                if ((afd = open(argv[1]+1, O_RDONLY)) < 0)
                        fatalerr("cannot open \"%s\"\n", argv[1]+1);
                fstat(afd, &ast);
                args = (char *)malloc(ast.st_size + 1);
                if ((ast.st_size = read(afd, args, ast.st_size)) < 0)
                        fatalerr("failed to read %s\n", argv[1]+1);
                args[ast.st_size] = '\0';
                close(afd);

#if defined(WIN32)
                if (parse_cmdbuffer( argv[0], args, &nargv, &argc ) == -1)
                        fatalerr( "failed to parse %s\n", argv[1]+1 );

                for (nargc = 1; nargv[nargc]; nargc++) {
                        debug(1, ("arg%d: %s\n", nargc, nargv[nargc]));
                }

                argv = nargv;
#else
                for (nargc = 1, p = args; *p; p++) {
                        if (quotechar) {
                        if (quotechar == '\\' ||
                                (*p == quotechar && p[-1] != '\\'))
                                quotechar = '\0';
                        continue;
                        }
                        switch (*p) {
                        case '\\':
                        case '"':
                        case '\'':
                        quotechar = *p;
                        break;
                        case ' ':
                        case '\n':
                        *p = '\0';
                        if (p > args && p[-1])
                                nargc++;
                        break;
                        }
                }
                if (p[-1])
                        nargc++;
                nargv = (char **)malloc(nargc * sizeof(char *));
                nargv[0] = argv[0];
                argc = 1;
                for (p = args; argc < nargc; p += strlen(p) + 1)
                        if (*p) nargv[argc++] = p;
                argv = nargv;
#endif
        }

        for(argc--, argv++; argc; argc--, argv++) {
                /* if looking for endmarker then check before parsing */
                if (endmarker && strcmp (endmarker, *argv) == 0) {
                    endmarker = NULL;
                    continue;
                }
                if (**argv != '-') {
                        /* treat +thing as an option for C++ */
                        if (endmarker && **argv == '+')
                                continue;
                        *fp++ = argv[0];
                        continue;
                }
                switch(argv[0][1]) {
                case '-':
                        if (strcmp("help", argv[0]+2) == 0)
                                usage();
                        endmarker = &argv[0][2];
                        if (endmarker[0] == '\0') endmarker = "--";
                        break;
                case 'D':
                        if (argv[0][2] == '\0') {
                                argv++;
                                argc--;
                        }
                        for (p=argv[0] + 2; *p ; p++)
                                if (*p == '=') {
                                        *p = ' ';
                                        break;
                                }
                        define(argv[0] + 2, &maininclist);
                        debug(1, ("-D%s\n", argv[0] + 2));
                        break;
                case 'I':
                        if (incp >= includedirs + MAXDIRS)
                                fatalerr("Too many -I flags.\n");
                        *incp++ = argv[0]+2;
                        if (**(incp-1) == '\0') {
                                *(incp-1) = *(++argv);
                                argc--;
                        }
                        debug(1, ("-I%s\n", *(incp-1)));
                        break;
                case 'Y':
                        if (defp >= defincdirs + MAXDIRS)
                                fatalerr("Too many -Y flags.\n");
                        *defp++ = argv[0]+2;
                        if (**(defp-1) == '\0') {
                                *(defp-1) = *(++argv);
                                argc--;
                        }
                        debug(1, ("-Y%s\n", *(defp-1)));
                        break;
                case 'M':
                        for (p=argv[0]+2; *p; p++)
                                switch (*p) {
                                case 'M':
                                        mflags |= MFLAG_NOSYSTEM;
                                        break;
                                case 'G':
                                        mflags |= MFLAG_GENERATED;
                                        break;
                                default:
                                        warning("ignoring option -M%c\n", *p);
                                        break;
                                }
                        break;

                /* do not use if endmarker processing */
                case 'a':
                        if (endmarker) break;
                        append = TRUE;
                        break;
                case 'w':
                        if (endmarker) break;
                        if (argv[0][2] == '\0') {
                                argv++;
                                argc--;
                                width = atoi(argv[0]);
                        } else
                                width = atoi(argv[0]+2);
                        break;
                case 'o':                       /* objsuffix */
                        if (endmarker) break;
                        if (argv[0][2] == '\0') {
                                argv++;
                                argc--;
                                objsuffix = argv[0];
                        } else
                                objsuffix = argv[0]+2;
                        break;
                case 'p':                       /* objprefix(s) */                    
                        if (endmarker) break;
                        if (prefixp >= objprefixs + MAXPREFIXS)
                                fatalerr("Too many -p flags.\n");
                        *prefixp++ = argv[0]+2;
                        if (**(prefixp-1) == '\0') {
                                *(prefixp-1) = *(++argv);
                                argc--;
                        }
                        debug(1, ("-p%s\n", *(prefixp-1)));
                        break;
                case 'b':                       /* basename */
                        if (endmarker) break;
                        opt_basename = TRUE;
                        break;
                case 'W':                       /* whitespace handling */
                        if (endmarker) break;
                        embeddedwhite = BS_ESCAPE;
                        for (p=argv[0]+2; *p; p++)
                                switch (*p) {
                                case '0':       /* method 0: nothing */
                                case '-':
                                        embeddedwhite = BS_IGNORE;
                                        break;
                                case '1':       /* method 1: escape */  
                                case 'e':
                                case '+':
                                        embeddedwhite = BS_ESCAPE;
                                        break;
                                case '2':       /* method 2: quote path */
                                case 'q':
                                        embeddedwhite = BS_QUOTE;
                                        break;
                                case '3':       /* method 3: junk */
                                case 'j':
                                        embeddedwhite = BS_JUNK;
                                        break;
                                case '4':       /* method 3: URL */
                                case 'u':
                                        embeddedwhite = BS_URL;
                                        break;
                                default:
                                        warning("ignoring option -W%c\n", *p);
                                        break;
                                }
                        break;
                case 'v':
                        if (endmarker) break;
                        verbose = TRUE;
#ifdef DEBUG
                        if (argv[0][2])
                                _debugmask = atoi(argv[0]+2);
#ifdef MSDOS
                        __systeml_debug = 1;
#endif
#endif
                        break;
                case 's':
                        if (endmarker) break;
                        startat = argv[0]+2;
                        if (*startat == '\0') {
                                startat = *(++argv);
                                argc--;
                        }
                        if (*startat != '#')
                                fatalerr("-s flag's value should start %s\n",
                                        "with '#'.");
                        break;
                case 'f':
                        if (endmarker) break;
                        makefile = argv[0]+2;
                        if (*makefile == '\0') {
                                makefile = *(++argv);
                                argc--;
                        }
                        break;

                case 'm':
                        warn_multiple = TRUE;
                        break;
                        
                /* Ignore -O, -g so we can just pass ${CFLAGS} to
                 *      makedepend
                 */
                case 'O':
                case 'g':
                        break;
                default:
                        if (endmarker) break;
                        warning("ignoring option %s\n", argv[0]);
                }
        }

        systemdirs = incp;      /* mark beginning of system directories */
        if (!defincdirs[0]) {
#ifdef PREINCDIR
                if (incp >= includedirs + MAXDIRS)
                        fatalerr("Too many -I flags.\n");
                *incp++ = PREINCDIR;
#endif
#ifdef INCLUDEDIR
                if (incp >= includedirs + MAXDIRS)
                        fatalerr("Too many -I flags.\n");
                *incp++ = INCLUDEDIR;
#endif
#ifdef POSTINCDIR
                if (incp >= includedirs + MAXDIRS)
                        fatalerr("Too many -I flags.\n");
                *incp++ = POSTINCDIR;
#endif
#if defined(WIN32) || defined(MSDOS)
                {
                        char *p, *p2;

                        if ((p = getenv("INCLUDE")) != NULL && *p &&
                                (p = p2 = strdup(p)) != (char *)NULL) 
                        {
                        /* split path */
                                do {
                                        *incp = p;
                                        if ((p = strchr(p, ';')) != NULL)
                                                *p++ = '\0';
                                        debug(1, ("imported -I%s\n", *incp));
                                        incp++;
                                } while (p && *p);
                        }
                }
#endif  /*WIN32, MSDOS*/
        } else {
                register char   **pp;

                for (pp = defincdirs; *pp; pp++) {
                        if (incp >= includedirs + MAXDIRS)
                            fatalerr("Too many -I and -Y flags.\n");
                        *incp++ = *pp;
                }
        }
#if defined(WIN32) || defined(MSDOS)
        {
                register char   **pp, *p;

                for (pp = includedirs; *pp; pp++) {
                        p = *pp;
                        do {
                                if ((p = strchr(p, '\\')) != NULL)
                                        *p = '/';
                        } while (p && *p);
                }
        }
#endif  /*WIN32, MSDOS*/

        /* terminate each directory with '/', allowing 
         *      simple -MM detection.
         */
        if (mflags & MFLAG_NOSYSTEM) {
                register char   **pp, *p;
                register int    len;

                for (pp = systemdirs; *pp; pp++) {
                        len = strlen(*pp);
                        if ( len == 0 )
                            break;
                        if ( (*pp)[ len-1 ] != '/' ) {
                                p = malloc(len+2);
                                (void) strcpy(p, (const char *)*pp);
                                p[ len ] = '/', p[ len+1 ] = '\0';
                                debug(1, ("conv -Y%s\n", p));
                                *pp = p;
                        }
                }
        }

        redirect(startat, makefile);

        /*
         * catch signals.
         */
#ifdef USGISH
/*  should really reset SIGINT to SIG_IGN if it was.  */
#ifdef SIGHUP
        signal (SIGHUP,  catch);
#endif
        signal (SIGINT,  catch);
#ifdef SIGQUIT
        signal (SIGQUIT, catch);
#endif
        signal (SIGILL,  catch);
#ifdef SIGBUS
        signal (SIGBUS,  catch);
#endif
        signal (SIGSEGV, catch);
#ifdef SIGSYS
        signal (SIGSYS,  catch);
#endif
#else
        sig_act.sa_handler = catch;
#ifdef _POSIX_SOURCE
        sigemptyset(&sig_act.sa_mask);
        sigaddset(&sig_act.sa_mask, SIGINT);
        sigaddset(&sig_act.sa_mask, SIGQUIT);
#ifdef SIGBUS
        sigaddset(&sig_act.sa_mask, SIGBUS);
#endif
        sigaddset(&sig_act.sa_mask, SIGILL);
        sigaddset(&sig_act.sa_mask, SIGSEGV);
        sigaddset(&sig_act.sa_mask, SIGHUP);
        sigaddset(&sig_act.sa_mask, SIGPIPE);
#ifdef SIGSYS
        sigaddset(&sig_act.sa_mask, SIGSYS);
#endif
#else
        sig_act.sa_mask = ((1<<(SIGINT -1))
                           |(1<<(SIGQUIT-1))
#ifdef SIGBUS
                           |(1<<(SIGBUS-1))
#endif
                           |(1<<(SIGILL-1))
                           |(1<<(SIGSEGV-1))
                           |(1<<(SIGHUP-1))
                           |(1<<(SIGPIPE-1))
#ifdef SIGSYS
                           |(1<<(SIGSYS-1))
#endif
                           );
#endif /* _POSIX_SOURCE */
        sig_act.sa_flags = 0;
        sigaction(SIGHUP, &sig_act, (struct sigaction *)0);
        sigaction(SIGINT, &sig_act, (struct sigaction *)0);
        sigaction(SIGQUIT, &sig_act, (struct sigaction *)0);
        sigaction(SIGILL, &sig_act, (struct sigaction *)0);
#ifdef SIGBUS
        sigaction(SIGBUS, &sig_act, (struct sigaction *)0);
#endif
        sigaction(SIGSEGV, &sig_act, (struct sigaction *)0);
#ifdef SIGSYS
        sigaction(SIGSYS, &sig_act, (struct sigaction *)0);
#endif
#endif /* USGISH */

        /*
         * now peruse through the list of files.
         */
        for(fp=filelist; *fp; fp++) {
                filecontent = getfile(*fp);
                ip = newinclude(*fp, (char *)NULL);

                find_includes(filecontent, ip, ip, 0, FALSE);
                freefile(filecontent);
                recursive_pr_include(ip, ip->i_file, base_name(*fp));
                inc_clean();
                inc_dump();
        }
        if (printed)
                printf("\n");
        exit(0);
}


static void 
usage(void)
{
        fprintf( stderr,
"Makedepend - %d.%02d\n" \
"Create dependencies in makefiles\n" \
"\n" \
"Usage: %s [-D name[=def]] [-I includedir] [-Y includedir]\n" \
"         [-a] [-f makefile] [-b] [-W[1|2]] [-o objsuffix] [-p objprefix]\n" \
"         [-s string] [-w width] [-v] [-m] [-- otheroptions --]\n" \
"         sourcefile [sourcefile ...]\n\n",
        VMAJOR, VMINOR, ProgramName );

        fprintf( stderr,
"Options:\n" \
" -f makefile              Alternate output file name\n" \
" -a                       Append dependencies to the end of the file.\n" \
" -DIname=def or -DIname   Define a symbol.\n" \
" -I includedir            Include directory.\n" \
" -Y includedir            System include directory.\n" \
" -b                       Strip any directory from object file name.\n" \
" -W[0|1|2|3|4]            Specify method of handling embedded whitespace.\n" \
"    0                     - Disable warnings.\n"\
"    1                     - Escape (eg /Embedded\\ Space/x.h).\n"\
"    2                     - Quote the entire path (eg \"/Embedded Space/x.h\").\n"\
"    3                     - Junk.\n"\
"    4                     - URL style (eg /Embedded%%20Space/x.h).\n"\
" -o objsuffix             Object file suffix.\n" \
" -p objprefix             Object file prefix.\n" \
" -s string                Starting string delimiter.\n" \
" -w width                 Line width.\n" \
" -v                       Verbose operation.\n" \
" -m                       Warn about multiple inclusion.\n" \
" -M                       GCC style dependency generation.\n" \
"    -M                    - Output dependencies.\n"\
"    -MG                   - Treat missing header files as generated\n" \
"    -MM                   - Output mentions only the user header\n" \
"\n");
        exit(1);
}


struct filepointer *getfile(file)
        char    *file;
{
        register int    fd;
        struct filepointer      *content;
        struct stat     st;

        content = (struct filepointer *)malloc(sizeof(struct filepointer));
        debug(1,( "Opening File: %s\n", file ));
        
        if ((fd = open(file, O_RDONLY)) < 0) {
                warning("cannot open \"%s\"\n", file);
                content->f_p = content->f_base = content->f_end = (char *)malloc(1);
                *content->f_p = '\0';
                return(content);
        }
        fstat(fd, &st);
        content->f_base = (char *)malloc(st.st_size+1);
        if (content->f_base == NULL)
                fatalerr("cannot allocate mem\n");
        if ((st.st_size = read(fd, content->f_base, st.st_size)) < 0)
                fatalerr("failed to read %s\n", file);
        close(fd);
        content->f_len = st.st_size+1;
        content->f_p = content->f_base;
        content->f_end = content->f_base + st.st_size;
        *content->f_end = '\0';
        content->f_line = 0;
        content->f_name = copy(file);
        return(content);
}

freefile(fp)
        struct filepointer      *fp;
{
        debug(1,( "EndProcessing File: %s\n", fp->f_name ));
        free(fp->f_base);
        free(fp);
   return (0);
}

char *copy(str)
        register char   *str;
{
        register char   *p = (char *)malloc(strlen(str) + 1);

        strcpy(p, str);
        return(p);
}

match(str, list)
        register char *str;
        register const char **list;
{
        register int    i;

        for (i=0; *list; i++, list++)
                if (strcmp(str, *list) == 0)
                        return(i);
        return(-1);
}

/*
 * Get the next line.  We only return lines beginning with '#' since that
 * is all this program is ever interested in.
 */
char *my_getline(filep)
        register struct filepointer     *filep;
{
        register char   *p,             /* walking pointer */
                        *eof,           /* end of file pointer */
                        *bol;           /* beginning of line pointer */
        register        lineno;         /* line number */

        p = filep->f_p;
        eof = filep->f_end;
        if (p >= eof)
                return((char *)NULL);
        lineno = filep->f_line;

        for(bol = p--; ++p < eof; ) {

                if (*p == '/' && *(p+1) == '*') {       /* consume comments */
                        *p++ = ' ', *p++ = ' ';
                        while (*p) {
                                if (*p == '*' && *(p+1) == '/') {
                                        *p++ = ' ', *p = ' ';
                                        break;
                                }
                                else if (*p == '\n')
                                        lineno++;
                                *p++ = ' ';
                        }
                        continue;
                }
#if defined(MSDOS) || defined(WIN32)
                else if (*p == '/' && *(p+1) == '/') {  /* consume comments */
                        *p++ = ' ', *p++ = ' ';
                        while (*p && *p != '\n')
                                *p++ = ' ';
                        --p;
                        continue;
                }
#endif
                else if (*p == '\\') {
                        if (*(p+1) == '\n') {
                                *p = ' ';
                                *(p+1) = ' ';
                                lineno++;
                        }
                }
                else if (*p == '\n') {
                        char *cp = bol;
                        lineno++;

                        /*
                        **  Allow white space before a directive. Its not ansi, but
                        **  it is used by people
                        */
                        if ( *cp == ' ' || *cp == '\t' )
                        {
                            while ( *cp == ' ' || *cp == '\t' )
                            {
                                *cp++;
                            }
                            bol = cp;
                        }

                        if (*bol == '#') {
                                register char *cp;

                                *p++ = '\0';
                                /* punt lines with just # (yacc generated) */
                                for (cp = bol+1;
                                     *cp && (*cp == ' ' || *cp == '\t'); cp++);
                                if (*cp)
                                    goto done;
                        }
                        bol = p+1;
                }
        }

        if (*bol != '#')
                bol = NULL;
done:

        filep->f_p = p;
        filep->f_line = lineno;
        return(bol);
}

/*
 * Strip the file name down to what we want to see in the Makefile.
 * It will have objprefix and objsuffix around it.
 */
char *base_name(file)
        register char   *file;
{
        register char   *p;

        file = copy(file);
        for(p=file+strlen(file); p>file && *p != '.'; p--) ;

        if (*p == '.')
                *p = '\0';
        return(file);
}

#if defined(USG) && !defined(CRAY) && !defined(SVR4)
int
rename (from, to)
        char *from, *to;
{
        (void) unlink (to);
        if (link (from, to) == 0) {
                unlink (from);
                return 0;
        } else {
                return -1;
        }
}
#endif /* USGISH */


void
redirect(line, makefile)
        char    *line,
                *makefile;
{
        struct stat     st;
        FILE    *fdin, *fdout;
        char    backup[ MAX_PATH+1 ],
                buf[ MAX_PATH+1 ];
        boolean found = FALSE;
        int     len;

        /*
         * if makefile is "-" then let it pour onto stdout.
         */
        if (makefile && *makefile == '-' && *(makefile+1) == '\0') {
                puts(line);
                return;
        }

        /*
         * use a default makefile is not specified.
         */
        if (!makefile) {
                if (stat("Makefile", &st) == 0)
                        makefile = "Makefile";
                else if (stat("makefile", &st) == 0)
                        makefile = "makefile";
                else
                        fatalerr("[mM]akefile is not present\n");
        }
        else
            stat(makefile, &st);
        if ((fdin = fopen(makefile, "r")) == NULL)
                fatalerr("cannot open \"%s\"\n", makefile);
        sprintf(backup, "%s.bak", makefile);
        unlink(backup);
#if defined(WIN32) || defined(MSDOS)
        fclose(fdin);
#endif
        if (rename(makefile, backup) < 0)
                fatalerr("cannot rename %s to %s\n", makefile, backup);
#if defined(WIN32) || defined(MSDOS)
        if ((fdin = fopen(backup, "r")) == NULL)
                fatalerr("cannot open \"%s\"\n", backup);
#endif
        if ((fdout = freopen(makefile, "w", stdout)) == NULL)
                fatalerr("cannot open \"%s\"\n", backup);
        len = strlen(line);
        while (!found && fgets(buf, MAX_PATH, fdin)) {
                if (*buf == '#' && strncmp(line, buf, len) == 0)
                        found = TRUE;
                fputs(buf, fdout);
        }
        if (!found) {
                if (verbose)
                        warning("Adding new delimiting line \"%s\" and dependencies...\n", line);
                puts(line); /* same as fputs(fdout); but with newline */
        } else if (append) {
            while (fgets(buf, MAX_PATH, fdin)) {
                fputs(buf, fdout);
            }
        }
		fclose(fdin);
        fflush(fdout);
#if defined(USGISH) || defined(_SEQUENT_)
        chmod(makefile, st.st_mode);
#else
        fchmod(fileno(fdout), st.st_mode);
#endif /* USGISH */
}


void
#ifdef NeedVarargsPrototypes
fatalerr(char *msg, ...)
#else
/*VARARGS*/
fatalerr(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
    char *msg;
#endif
{
#ifdef NeedVarargsPrototypes
        va_list args;
#endif
        fprintf(stderr, "%s: error:  ", ProgramName);
#ifdef NeedVarargsPrototypes
        va_start(args, msg);
        vfprintf(stderr, msg, args);
        va_end(args);
#else
        fprintf(stderr, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
        exit (1);
}


void
#if NeedVarargsPrototypes
warning(char *msg, ...)
#else
/*VARARGS0*/
warning(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
    char *msg;
#endif
{
#if NeedVarargsPrototypes
        va_list args;
#endif
        fprintf(stderr, "%s: warning:  ", ProgramName);
#if NeedVarargsPrototypes
        va_start(args, msg);
        vfprintf(stderr, msg, args);
        va_end(args);
#else
        fprintf(stderr, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
}


void
#if NeedVarargsPrototypes
warning1(char *msg, ...)
#else
/*VARARGS0*/
warning1(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
    char *msg;
#endif
{
#if NeedVarargsPrototypes
        va_list args;
        va_start(args, msg);
        vfprintf(stderr, msg, args);
        va_end(args);
#else
        fprintf(stderr, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
}


void
#if NeedVarargsPrototypes
info(char *msg, ...)
#else
/*VARARGS0*/
info(msg,x1,x2,x3,x4,x5,x6,x7,x8,x9)
        char *msg;
#endif
{
#if NeedVarargsPrototypes
        va_list args;
#endif
        fprintf(stderr, "%s: info: ", ProgramName);
#if NeedVarargsPrototypes
        va_start(args, msg);
        vfprintf(stderr, msg, args);
        va_end(args);
#else
        fprintf(stderr, msg,x1,x2,x3,x4,x5,x6,x7,x8,x9);
#endif
}