/*      $OpenBSD: file.c,v 1.276 2023/08/11 04:48:14 guenther Exp $     */
/*
 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
 * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
 */

#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <libgen.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "atomicio.h"
#include "cvs.h"
#include "remote.h"

#define CVS_IGN_STATIC  0x01    /* pattern is static, no need to glob */

#define CVS_CHAR_ISMETA(c)      ((c == '*') || (c == '?') || (c == '['))

extern int print_stdout;
extern int build_dirs;

/*
 * Standard patterns to ignore.
 */
static const char *cvs_ign_std[] = {
        ".",
        "..",
        "*.o",
        "*.a",
        "*.bak",
        "*.orig",
        "*.rej",
        "*.old",
        "*.exe",
        "*.depend",
        "*.obj",
        "*.elc",
        "*.ln",
        "*.olb",
        "CVS",
        "core",
        "cvslog*",
        "*.core",
        ".#*",
        "*~",
        "_$*",
        "*$",
};

char *cvs_directory_tag = NULL;
struct ignore_head cvs_ign_pats;
struct ignore_head dir_ign_pats;
struct ignore_head checkout_ign_pats;

RB_GENERATE(cvs_flisthead, cvs_filelist, flist, cvs_filelist_cmp);

void
cvs_file_init(void)
{
        int i;
        FILE *ifp;
        char path[PATH_MAX], buf[MAXNAMLEN];

        TAILQ_INIT(&cvs_ign_pats);
        TAILQ_INIT(&dir_ign_pats);
        TAILQ_INIT(&checkout_ign_pats);

        /* standard patterns to ignore */
        for (i = 0; i < (int)(sizeof(cvs_ign_std)/sizeof(char *)); i++)
                cvs_file_ignore(cvs_ign_std[i], &cvs_ign_pats);

        if (cvs_homedir == NULL)
                return;

        /* read the cvsignore file in the user's home directory, if any */
        (void)xsnprintf(path, PATH_MAX, "%s/.cvsignore", cvs_homedir);

        ifp = fopen(path, "r");
        if (ifp == NULL) {
                if (errno != ENOENT)
                        cvs_log(LP_ERRNO,
                            "failed to open user's cvsignore file `%s'", path);
        } else {
                while (fgets(buf, MAXNAMLEN, ifp) != NULL) {
                        buf[strcspn(buf, "\n")] = '\0';
                        if (buf[0] == '\0')
                                continue;

                        cvs_file_ignore(buf, &cvs_ign_pats);
                }

                (void)fclose(ifp);
        }
}

void
cvs_file_ignore(const char *pat, struct ignore_head *list)
{
        char *cp;
        size_t len;
        struct cvs_ignpat *ip;

        ip = xmalloc(sizeof(*ip));
        len = strlcpy(ip->ip_pat, pat, sizeof(ip->ip_pat));
        if (len >= sizeof(ip->ip_pat))
                fatal("cvs_file_ignore: truncation of pattern '%s'", pat);

        /* check if we will need globbing for that pattern */
        ip->ip_flags = CVS_IGN_STATIC;
        for (cp = ip->ip_pat; *cp != '\0'; cp++) {
                if (CVS_CHAR_ISMETA(*cp)) {
                        ip->ip_flags &= ~CVS_IGN_STATIC;
                        break;
                }
        }

        TAILQ_INSERT_TAIL(list, ip, ip_list);
}

int
cvs_file_chkign(const char *file)
{
        int flags;
        struct cvs_ignpat *ip;

        flags = FNM_PERIOD;
        if (cvs_nocase)
                flags |= FNM_CASEFOLD;

        TAILQ_FOREACH(ip, &cvs_ign_pats, ip_list) {
                if (ip->ip_flags & CVS_IGN_STATIC) {
                        if (cvs_file_cmpname(file, ip->ip_pat) == 0)
                                return (1);
                } else if (fnmatch(ip->ip_pat, file, flags) == 0)
                        return (1);
        }

        TAILQ_FOREACH(ip, &dir_ign_pats, ip_list) {
                if (ip->ip_flags & CVS_IGN_STATIC) {
                        if (cvs_file_cmpname(file, ip->ip_pat) == 0)
                                return (1);
                } else if (fnmatch(ip->ip_pat, file, flags) == 0)
                        return (1);
        }

        TAILQ_FOREACH(ip, &checkout_ign_pats, ip_list) {
                if (ip->ip_flags & CVS_IGN_STATIC) {
                        if (cvs_file_cmpname(file, ip->ip_pat) == 0)
                                return (1);
                } else if (fnmatch(ip->ip_pat, file, flags) == 0)
                        return (1);
        }

        return (0);
}

void
cvs_file_run(int argc, char **argv, struct cvs_recursion *cr)
{
        int i;
        struct cvs_flisthead fl;

        RB_INIT(&fl);

        for (i = 0; i < argc; i++) {
                STRIP_SLASH(argv[i]);
                cvs_file_get(argv[i], FILE_USER_SUPPLIED, &fl, 0);
        }

        cvs_file_walklist(&fl, cr);
        cvs_file_freelist(&fl);
}

struct cvs_filelist *
cvs_file_get(char *name, int flags, struct cvs_flisthead *fl, int type)
{
        char *p;
        struct cvs_filelist *l, find;

        for (p = name; p[0] == '.' && p[1] == '/';)
                p += 2;

        find.file_path = p;
        l = RB_FIND(cvs_flisthead, fl, &find);
        if (l != NULL)
                return (l);

        l = xmalloc(sizeof(*l));
        l->file_path = xstrdup(p);
        l->flags = flags;
        l->type = type;

        RB_INSERT(cvs_flisthead, fl, l);
        return (l);
}

struct cvs_file *
cvs_file_get_cf(const char *d, const char *f, const char *fpath, int fd,
        int type, int flags)
{
        const char *p;
        struct cvs_file *cf;

        for (p = fpath; p[0] == '.' && p[1] == '/';)
                p += 2;

        cf = xcalloc(1, sizeof(*cf));

        cf->file_name = xstrdup(f);
        cf->file_wd = xstrdup(d);
        cf->file_path = xstrdup(p);
        cf->fd = fd;
        cf->repo_fd = -1;
        cf->file_type = type;
        cf->file_status = 0;
        cf->file_flags = flags;
        cf->in_attic = 0;
        cf->file_ent = NULL;

        if (cf->fd != -1)
                cf->file_flags |= FILE_ON_DISK;

        if (cvsroot_is_remote() || cvs_server_active == 1)
                cvs_validate_directory(cf->file_path);

        return (cf);
}

void
cvs_file_walklist(struct cvs_flisthead *fl, struct cvs_recursion *cr)
{
        int fd, type;
        struct stat st;
        struct cvs_file *cf;
        struct cvs_filelist *l, *nxt;
        char *d, dbuf[PATH_MAX], *f, fbuf[PATH_MAX];
        char repo[PATH_MAX], fpath[PATH_MAX];

        for (l = RB_MIN(cvs_flisthead, fl); l != NULL; l = nxt) {
                if (cvs_quit)
                        fatal("received signal %d", sig_received);

                cvs_log(LP_TRACE, "cvs_file_walklist: element '%s'",
                    l->file_path);

                if (strlcpy(fbuf, l->file_path, sizeof(fbuf)) >= sizeof(fbuf))
                        fatal("cvs_file_walklist: truncation");
                if ((f = basename(fbuf)) == NULL)
                        fatal("cvs_file_walklist: basename failed");

                if (strlcpy(dbuf, l->file_path, sizeof(dbuf)) >= sizeof(dbuf))
                        fatal("cvs_file_walklist: truncation");
                if ((d = dirname(dbuf)) == NULL)
                        fatal("cvs_file_walklist: dirname failed");

                type = l->type;
                if ((fd = open(l->file_path, O_RDONLY)) != -1) {
                        if (type == 0) {
                                if (fstat(fd, &st) == -1) {
                                        cvs_log(LP_ERRNO, "%s", l->file_path);
                                        (void)close(fd);
                                        goto next;
                                }

                                if (S_ISDIR(st.st_mode))
                                        type = CVS_DIR;
                                else if (S_ISREG(st.st_mode))
                                        type = CVS_FILE;
                                else {
                                        cvs_log(LP_ERR,
                                            "ignoring bad file type for %s",
                                            l->file_path);
                                        (void)close(fd);
                                        goto next;
                                }
                        }
                } else if (cvsroot_is_local()) {
                        /*
                         * During checkout -p, do not use any locally
                         * available directories.
                         */
                        if ((cmdp->cmd_flags & CVS_USE_WDIR) &&
                            (cvs_cmdop != CVS_OP_CHECKOUT || !print_stdout))
                                if (stat(d, &st) == -1) {
                                        cvs_log(LP_ERRNO, "%s", d);
                                        goto next;
                                }

                        cvs_get_repository_path(d, repo, PATH_MAX);
                        (void)xsnprintf(fpath, PATH_MAX, "%s/%s",
                            repo, f);

                        if ((fd = open(fpath, O_RDONLY)) == -1) {
                                strlcat(fpath, RCS_FILE_EXT, PATH_MAX);
                                fd = open(fpath, O_RDONLY);
                        }

                        if (fd != -1 && type == 0) {
                                if (fstat(fd, &st) == -1)
                                        fatal("cvs_file_walklist: %s: %s",
                                             fpath, strerror(errno));

                                if (S_ISDIR(st.st_mode))
                                        type = CVS_DIR;
                                else if (S_ISREG(st.st_mode))
                                        type = CVS_FILE;
                                else {
                                        cvs_log(LP_ERR,
                                            "ignoring bad file type for %s",
                                            l->file_path);
                                        (void)close(fd);
                                        goto next;
                                }

                                /* this file is not in our working copy yet */
                                (void)close(fd);
                                fd = -1;
                        } else if (fd != -1) {
                                close(fd);
                                fd = -1;
                        }
                }

                cf = cvs_file_get_cf(d, f, l->file_path, fd, type, l->flags);
                if (cf->file_type == CVS_DIR) {
                        cvs_file_walkdir(cf, cr);
                } else {
                        if (l->flags & FILE_USER_SUPPLIED) {
                                cvs_parse_tagfile(cf->file_wd,
                                    &cvs_directory_tag, NULL, NULL);

                                if (cvs_directory_tag == NULL &&
                                    cvs_specified_tag != NULL)
                                        cvs_directory_tag =
                                            xstrdup(cvs_specified_tag);

                                if (cvsroot_is_local()) {
                                        cvs_get_repository_path(cf->file_wd,
                                            repo, PATH_MAX);
                                        cvs_repository_lock(repo,
                                            (cmdp->cmd_flags & CVS_LOCK_REPO));
                                }
                        }

                        if (cr->fileproc != NULL)
                                cr->fileproc(cf);

                        if (l->flags & FILE_USER_SUPPLIED) {
                                if (cvsroot_is_local() &&
                                    (cmdp->cmd_flags & CVS_LOCK_REPO)) {
                                        cvs_repository_unlock(repo);
                                }
                                free(cvs_directory_tag);
                                cvs_directory_tag = NULL;
                        }
                }

                cvs_file_free(cf);

next:
                nxt = RB_NEXT(cvs_flisthead, fl, l);
        }
}

void
cvs_file_walkdir(struct cvs_file *cf, struct cvs_recursion *cr)
{
        int l, type;
        FILE *fp;
        int nbytes;
        size_t bufsize;
        struct stat st;
        struct dirent *dp;
        struct cvs_ent *ent;
        struct cvs_ignpat *ip;
        struct cvs_ent_line *line;
        struct cvs_flisthead fl, dl;
        CVSENTRIES *entlist;
        char *buf, *ebuf, *cp, repo[PATH_MAX], fpath[PATH_MAX];

        cvs_log(LP_TRACE, "cvs_file_walkdir(%s)", cf->file_path);

        if (cr->enterdir != NULL)
                cr->enterdir(cf);

        if (cr->fileproc != NULL)
                cr->fileproc(cf);

        if (cf->file_status == FILE_SKIP)
                return;

        /*
         * If this is a repository-only command, do not touch any
         * locally available directories or try to create them.
         */
        if (!(cmdp->cmd_flags & CVS_USE_WDIR)) {
                RB_INIT(&fl);
                RB_INIT(&dl);
                goto walkrepo;
        }

        /*
         * If we do not have an admin directory inside here, dont bother,
         * unless we are running export or import.
         */
        (void)xsnprintf(fpath, PATH_MAX, "%s/%s", cf->file_path,
            CVS_PATH_CVSDIR);

        l = stat(fpath, &st);
        if (cvs_cmdop != CVS_OP_EXPORT && cvs_cmdop != CVS_OP_IMPORT &&
            (l == -1 || (l == 0 && !S_ISDIR(st.st_mode)))) {
                return;
        }

        cvs_parse_tagfile(cf->file_path, &cvs_directory_tag, NULL, NULL);

        /*
         * check for a local .cvsignore file
         */
        (void)xsnprintf(fpath, PATH_MAX, "%s/.cvsignore", cf->file_path);

        if ((fp = fopen(fpath, "r")) != NULL) {
                while (fgets(fpath, PATH_MAX, fp) != NULL) {
                        fpath[strcspn(fpath, "\n")] = '\0';
                        if (fpath[0] == '\0')
                                continue;

                        cvs_file_ignore(fpath, &dir_ign_pats);
                }

                (void)fclose(fp);
        }

        if (fstat(cf->fd, &st) == -1)
                fatal("cvs_file_walkdir: %s %s", cf->file_path,
                    strerror(errno));

        if ((uintmax_t)st.st_size > SIZE_MAX)
                fatal("cvs_file_walkdir: %s: file size too big", cf->file_name);

        bufsize = (st.st_size > st.st_blksize) ? st.st_size : st.st_blksize;

        buf = xmalloc(bufsize);
        RB_INIT(&fl);
        RB_INIT(&dl);

        while ((nbytes = getdents(cf->fd, buf, bufsize)) > 0) {
                ebuf = buf + nbytes;
                cp = buf;

                while (cp < ebuf) {
                        dp = (struct dirent *)cp;
                        if (!strcmp(dp->d_name, ".") ||
                            !strcmp(dp->d_name, "..") ||
                            !strcmp(dp->d_name, CVS_PATH_CVSDIR) ||
                            dp->d_fileno == 0) {
                                cp += dp->d_reclen;
                                continue;
                        }

                        (void)xsnprintf(fpath, PATH_MAX, "%s/%s",
                            cf->file_path, dp->d_name);

                        if (cvs_file_chkign(dp->d_name) &&
                            cvs_cmdop != CVS_OP_RLOG &&
                            cvs_cmdop != CVS_OP_RTAG) {
                                if (cvs_cmdop == CVS_OP_IMPORT)
                                        cvs_import_ignored(fpath);
                                cp += dp->d_reclen;
                                continue;
                        }

                        /*
                         * nfs and afs will show d_type as DT_UNKNOWN
                         * for files and/or directories so when we encounter
                         * this we call lstat() on the path to be sure.
                         */
                        if (dp->d_type == DT_UNKNOWN) {
                                if (lstat(fpath, &st) == -1)
                                        fatal("'%s': %s", fpath,
                                            strerror(errno));

                                switch (st.st_mode & S_IFMT) {
                                case S_IFDIR:
                                        type = CVS_DIR;
                                        break;
                                case S_IFREG:
                                        type = CVS_FILE;
                                        break;
                                default:
                                        type = FILE_SKIP;
                                        break;
                                }
                        } else {
                                switch (dp->d_type) {
                                case DT_DIR:
                                        type = CVS_DIR;
                                        break;
                                case DT_REG:
                                        type = CVS_FILE;
                                        break;
                                default:
                                        type = FILE_SKIP;
                                        break;
                                }
                        }

                        if (type == FILE_SKIP) {
                                if (verbosity > 1) {
                                        cvs_log(LP_NOTICE, "ignoring `%s'",
                                            dp->d_name);
                                }
                                cp += dp->d_reclen;
                                continue;
                        }

                        switch (type) {
                        case CVS_DIR:
                                if (cr->flags & CR_RECURSE_DIRS)
                                        cvs_file_get(fpath, 0, &dl, CVS_DIR);
                                break;
                        case CVS_FILE:
                                cvs_file_get(fpath, 0, &fl, CVS_FILE);
                                break;
                        default:
                                fatal("type %d unknown, shouldn't happen",
                                    type);
                        }

                        cp += dp->d_reclen;
                }
        }

        if (nbytes == -1)
                fatal("cvs_file_walkdir: %s %s", cf->file_path,
                    strerror(errno));

        free(buf);

        while ((ip = TAILQ_FIRST(&dir_ign_pats)) != NULL) {
                TAILQ_REMOVE(&dir_ign_pats, ip, ip_list);
                free(ip);
        }

        entlist = cvs_ent_open(cf->file_path);
        TAILQ_FOREACH(line, &(entlist->cef_ent), entries_list) {
                ent = cvs_ent_parse(line->buf);

                (void)xsnprintf(fpath, PATH_MAX, "%s/%s", cf->file_path,
                    ent->ce_name);

                if (!(cr->flags & CR_RECURSE_DIRS) &&
                    ent->ce_type == CVS_ENT_DIR)
                        continue;
                if (ent->ce_type == CVS_ENT_DIR)
                        cvs_file_get(fpath, 0, &dl, CVS_DIR);
                else if (ent->ce_type == CVS_ENT_FILE)
                        cvs_file_get(fpath, 0, &fl, CVS_FILE);

                cvs_ent_free(ent);
        }

walkrepo:
        if (cvsroot_is_local()) {
                cvs_get_repository_path(cf->file_path, repo, PATH_MAX);
                cvs_repository_lock(repo, (cmdp->cmd_flags & CVS_LOCK_REPO));
        }

        if (cr->flags & CR_REPO) {
                xsnprintf(fpath, sizeof(fpath), "%s/%s", cf->file_path,
                    CVS_PATH_STATICENTRIES);

                if (!(cmdp->cmd_flags & CVS_USE_WDIR) ||
                    stat(fpath, &st) == -1 || build_dirs == 1)
                        cvs_repository_getdir(repo, cf->file_path, &fl, &dl,
                            (cr->flags & CR_RECURSE_DIRS) ?
                            REPOSITORY_DODIRS : 0);
        }

        cvs_file_walklist(&fl, cr);
        cvs_file_freelist(&fl);

        if (cvsroot_is_local() && (cmdp->cmd_flags & CVS_LOCK_REPO))
                cvs_repository_unlock(repo);

        if (cvs_directory_tag != NULL && cmdp->cmd_flags & CVS_USE_WDIR) {
                cvs_write_tagfile(cf->file_path, cvs_directory_tag, NULL);
                free(cvs_directory_tag);
                cvs_directory_tag = NULL;
        }

        cvs_file_walklist(&dl, cr);
        cvs_file_freelist(&dl);

        if (cr->leavedir != NULL)
                cr->leavedir(cf);
}

void
cvs_file_freelist(struct cvs_flisthead *fl)
{
        struct cvs_filelist *f, *nxt;

        for (f = RB_MIN(cvs_flisthead, fl); f != NULL; f = nxt) {
                nxt = RB_NEXT(cvs_flisthead, fl, f);
                RB_REMOVE(cvs_flisthead, fl, f);
                free(f->file_path);
                free(f);
        }
}

void
cvs_file_classify(struct cvs_file *cf, const char *tag)
{
        size_t len;
        struct stat st;
        BUF *b1, *b2;
        int server_has_file, notag;
        int rflags, ismodified, rcsdead;
        CVSENTRIES *entlist = NULL;
        const char *state;
        char repo[PATH_MAX], rcsfile[PATH_MAX];

        cvs_log(LP_TRACE, "cvs_file_classify(%s, %s)", cf->file_path,
            (tag != NULL) ? tag : "none");

        if (!strcmp(cf->file_path, ".")) {
                cf->file_status = FILE_UPTODATE;
                return;
        }

        cvs_get_repository_path(cf->file_wd, repo, PATH_MAX);
        (void)xsnprintf(rcsfile, PATH_MAX, "%s/%s",
            repo, cf->file_name);

        if (cf->file_type == CVS_FILE) {
                len = strlcat(rcsfile, RCS_FILE_EXT, PATH_MAX);
                if (len >= PATH_MAX)
                        fatal("cvs_file_classify: truncation");
        }

        cf->file_rpath = xstrdup(rcsfile);

        if (cmdp->cmd_flags & CVS_USE_WDIR) {
                entlist = cvs_ent_open(cf->file_wd);
                cf->file_ent = cvs_ent_get(entlist, cf->file_name);
        } else
                cf->file_ent = NULL;

        if (cf->file_ent != NULL) {
                if (cvs_specified_tag == NULL)
                        tag = cf->file_ent->ce_tag;

                if (cf->file_flags & FILE_ON_DISK &&
                    cf->file_ent->ce_type == CVS_ENT_FILE &&
                    cf->file_type == CVS_DIR && tag != NULL) {
                        cf->file_status = FILE_SKIP;
                        return;
                }

                if (cf->file_flags & FILE_ON_DISK &&
                    cf->file_ent->ce_type == CVS_ENT_DIR &&
                    cf->file_type == CVS_FILE && tag != NULL) {
                        cf->file_status = FILE_SKIP;
                        return;
                }

                if (cf->file_flags & FILE_INSIDE_ATTIC &&
                    cf->file_ent->ce_type == CVS_ENT_DIR &&
                    cf->file_type != CVS_DIR) {
                        cf->file_status = FILE_SKIP;
                        return;
                }

                if (cf->file_flags & FILE_ON_DISK &&
                    cf->file_ent->ce_type == CVS_ENT_DIR &&
                    cf->file_type != CVS_DIR)
                        fatal("%s is supposed to be a directory, but it is not",
                            cf->file_path);
                if (cf->file_flags & FILE_ON_DISK &&
                    cf->file_ent->ce_type == CVS_ENT_FILE &&
                    cf->file_type != CVS_FILE)
                        fatal("%s is supposed to be a file, but it is not",
                            cf->file_path);
        }

        if (cf->file_type == CVS_DIR) {
                if (!(cmdp->cmd_flags & CVS_USE_WDIR))
                        cf->file_status = FILE_UPTODATE;
                else if (cf->fd == -1 && stat(rcsfile, &st) != -1)
                        cf->file_status = DIR_CREATE;
                else if (cf->file_ent != NULL || cvs_cmdop == CVS_OP_RLOG ||
                    cvs_cmdop == CVS_OP_RTAG)
                        cf->file_status = FILE_UPTODATE;
                else
                        cf->file_status = FILE_UNKNOWN;

                return;
        }

        rflags = RCS_READ;
        switch (cvs_cmdop) {
        case CVS_OP_COMMIT:
        case CVS_OP_TAG:
        case CVS_OP_RTAG:
                rflags = RCS_WRITE;
                break;
        case CVS_OP_ADMIN:
        case CVS_OP_IMPORT:
        case CVS_OP_LOG:
        case CVS_OP_RLOG:
                rflags |= RCS_PARSE_FULLY;
                break;
        default:
                break;
        }

        cf->repo_fd = open(cf->file_rpath, O_RDONLY);
        if (cf->repo_fd != -1) {
                cf->file_rcs = rcs_open(cf->file_rpath, cf->repo_fd, rflags);
                if (cf->file_rcs == NULL)
                        fatal("cvs_file_classify: failed to parse RCS");
        } else {
                (void)xsnprintf(rcsfile, PATH_MAX, "%s/%s/%s%s",
                     repo, CVS_PATH_ATTIC, cf->file_name, RCS_FILE_EXT);

                cf->repo_fd = open(rcsfile, O_RDONLY);
                if (cf->repo_fd != -1) {
                        free(cf->file_rpath);
                        cf->file_rpath = xstrdup(rcsfile);
                        cf->file_rcs = rcs_open(cf->file_rpath,
                            cf->repo_fd, rflags);
                        if (cf->file_rcs == NULL)
                                fatal("cvs_file_classify: failed to parse RCS");
                        cf->in_attic = 1;
                } else {
                        cf->file_rcs = NULL;
                }
        }

        notag = 0;
        cf->file_flags |= FILE_HAS_TAG;
        if (tag != NULL && cf->file_rcs != NULL) {
                if ((cf->file_rcsrev = rcs_translate_tag(tag, cf->file_rcs))
                    == NULL) {
                        cf->file_rcsrev = rcs_translate_tag(NULL, cf->file_rcs);
                        if (cf->file_rcsrev != NULL) {
                                notag = 1;
                                cf->file_flags &= ~FILE_HAS_TAG;
                        }
                }
        } else if (cf->file_ent != NULL && cf->file_ent->ce_tag != NULL) {
                cf->file_rcsrev = rcsnum_alloc();
                rcsnum_cpy(cf->file_ent->ce_rev, cf->file_rcsrev, 0);
        } else if (cf->file_rcs != NULL) {
                cf->file_rcsrev = rcs_translate_tag(NULL, cf->file_rcs);
        } else {
                cf->file_rcsrev = NULL;
        }

        ismodified = rcsdead = 0;
        if ((cf->file_flags & FILE_ON_DISK) && cf->file_ent != NULL) {
                if (fstat(cf->fd, &st) == -1)
                        fatal("cvs_file_classify: %s", strerror(errno));

                if (st.st_mtime != cf->file_ent->ce_mtime)
                        ismodified = 1;
        }

        server_has_file = 0;
        if (cvs_server_active == 1 && cf->file_ent != NULL &&
            cf->file_ent->ce_mtime == CVS_SERVER_UPTODATE) {
                server_has_file = 1;
                ismodified = 0;
        }

        if ((server_has_file == 1) || (cf->fd != -1))
                cf->file_flags |= FILE_ON_DISK;

        if (ismodified == 1 &&
            (cf->file_flags & FILE_ON_DISK) && cf->file_rcs != NULL &&
            cf->file_ent != NULL && !RCSNUM_ISBRANCH(cf->file_ent->ce_rev) &&
            cf->file_ent->ce_status != CVS_ENT_ADDED) {
                b1 = rcs_rev_getbuf(cf->file_rcs, cf->file_ent->ce_rev, 0);
                b2 = buf_load_fd(cf->fd);

                if (buf_differ(b1, b2))
                        ismodified = 1;
                else
                        ismodified = 0;
                buf_free(b1);
                buf_free(b2);
        }

        if (cf->file_rcs != NULL && cf->file_rcsrev != NULL &&
            !RCSNUM_ISBRANCH(cf->file_rcsrev)) {
                state = rcs_state_get(cf->file_rcs, cf->file_rcsrev);
                if (state == NULL)
                        fatal("failed to get state for HEAD for %s",
                            cf->file_path);
                if (!strcmp(state, RCS_STATE_DEAD))
                        rcsdead = 1;

                if (cvs_specified_date == -1 && cvs_directory_date == -1 &&
                    tag == NULL && cf->in_attic &&
                    !RCSNUM_ISBRANCHREV(cf->file_rcsrev))
                        rcsdead = 1;

                cf->file_rcs->rf_dead = rcsdead;
        }

        /*
         * 10 Sin
         * 20 Goto hell
         * (I welcome you if-else hell)
         */
        if (cf->file_ent == NULL) {
                if (cf->file_rcs == NULL) {
                        if (!(cf->file_flags & FILE_ON_DISK)) {
                                cvs_log(LP_NOTICE,
                                    "nothing known about '%s'",
                                    cf->file_path);
                        }

                        cf->file_status = FILE_UNKNOWN;
                } else if (rcsdead == 1 || !(cf->file_flags & FILE_HAS_TAG)) {
                        if (!(cf->file_flags & FILE_ON_DISK)) {
                                cf->file_status = FILE_UPTODATE;
                        } else if (cvs_cmdop != CVS_OP_ADD) {
                                cf->file_status = FILE_UNKNOWN;
                        }
                } else if (notag == 0 && cf->file_rcsrev != NULL) {
                        cf->file_status = FILE_CHECKOUT;
                } else {
                        cf->file_status = FILE_UPTODATE;
                }

                return;
        }

        switch (cf->file_ent->ce_status) {
        case CVS_ENT_ADDED:
                if (!(cf->file_flags & FILE_ON_DISK)) {
                        if (cvs_cmdop != CVS_OP_REMOVE) {
                                cvs_log(LP_NOTICE,
                                    "warning: new-born %s has disappeared",
                                    cf->file_path);
                        }
                        cf->file_status = FILE_REMOVE_ENTRY;
                } else if (cf->file_rcs == NULL || rcsdead == 1 ||
                    !(cf->file_flags & FILE_HAS_TAG)) {
                        cf->file_status = FILE_ADDED;
                } else {
                        cvs_log(LP_NOTICE,
                            "conflict: %s already created by others",
                            cf->file_path);
                        cf->file_status = FILE_CONFLICT;
                }
                break;
        case CVS_ENT_REMOVED:
                if (cf->file_flags & FILE_ON_DISK) {
                        cvs_log(LP_NOTICE,
                            "%s should be removed but is still there",
                            cf->file_path);
                        cf->file_status = FILE_REMOVED;
                } else if (cf->file_rcs == NULL || rcsdead == 1) {
                        cf->file_status = FILE_REMOVE_ENTRY;
                } else {
                        if (rcsnum_differ(cf->file_ent->ce_rev,
                            cf->file_rcsrev) && cvs_cmdop != CVS_OP_ADD) {
                                cvs_log(LP_NOTICE,
                                    "conflict: removed %s was modified"
                                    " by a second party",
                                    cf->file_path);
                                cf->file_status = FILE_CONFLICT;
                        } else {
                                cf->file_status = FILE_REMOVED;
                        }
                }
                break;
        case CVS_ENT_REG:
                if (cf->file_rcs == NULL || cf->file_rcsrev == NULL ||
                    rcsdead == 1 || (reset_tag == 1 && cf->in_attic == 1) ||
                    (notag == 1 && tag != NULL)) {
                        if (!(cf->file_flags & FILE_ON_DISK)) {
                                cvs_log(LP_NOTICE,
                                    "warning: %s's entry exists but"
                                    " is no longer in the repository,"
                                    " removing entry",
                                     cf->file_path);
                                cf->file_status = FILE_REMOVE_ENTRY;
                        } else {
                                if (ismodified) {
                                        cvs_log(LP_NOTICE,
                                            "conflict: %s is no longer "
                                            "in the repository but is "
                                            "locally modified",
                                            cf->file_path);
                                        if (cvs_cmdop == CVS_OP_COMMIT)
                                                cf->file_status = FILE_UNLINK;
                                        else
                                                cf->file_status = FILE_CONFLICT;
                                } else if (cvs_cmdop != CVS_OP_IMPORT) {
                                        cvs_log(LP_NOTICE,
                                            "%s is no longer in the "
                                            "repository",
                                            cf->file_path);

                                        cf->file_status = FILE_UNLINK;
                                }
                        }
                } else if (cf->file_rcsrev == NULL) {
                        cf->file_status = FILE_UNLINK;
                } else {
                        if (!(cf->file_flags & FILE_ON_DISK)) {
                                if (cvs_cmdop != CVS_OP_REMOVE) {
                                        cvs_log(LP_NOTICE,
                                            "warning: %s was lost",
                                            cf->file_path);
                                }
                                cf->file_status = FILE_LOST;
                        } else {
                                if (ismodified == 1)
                                        cf->file_status = FILE_MODIFIED;
                                else
                                        cf->file_status = FILE_UPTODATE;
                                if (rcsnum_differ(cf->file_ent->ce_rev,
                                    cf->file_rcsrev)) {
                                        if (cf->file_status == FILE_MODIFIED)
                                                cf->file_status = FILE_MERGE;
                                        else
                                                cf->file_status = FILE_PATCH;
                                }
                        }
                }
                break;
        case CVS_ENT_UNKNOWN:
                if (cvs_server_active != 1)
                        fatal("server-side questionable in local mode?");
                cf->file_status = FILE_UNKNOWN;
                break;
        default:
                break;
        }
}

void
cvs_file_free(struct cvs_file *cf)
{
        free(cf->file_name);
        free(cf->file_wd);
        free(cf->file_path);
        free(cf->file_rcsrev);
        free(cf->file_rpath);
        if (cf->file_ent != NULL)
                cvs_ent_free(cf->file_ent);
        if (cf->file_rcs != NULL)
                rcs_close(cf->file_rcs);
        if (cf->fd != -1)
                (void)close(cf->fd);
        if (cf->repo_fd != -1)
                (void)close(cf->repo_fd);
        free(cf);
}

int
cvs_file_cmpname(const char *name1, const char *name2)
{
        return (cvs_nocase == 0) ? (strcmp(name1, name2)) :
            (strcasecmp(name1, name2));
}

int
cvs_file_cmp(const char *file1, const char *file2)
{
        struct stat stb1, stb2;
        int fd1, fd2, ret;

        ret = 0;

        if ((fd1 = open(file1, O_RDONLY|O_NOFOLLOW)) == -1)
                fatal("cvs_file_cmp: open: `%s': %s", file1, strerror(errno));
        if ((fd2 = open(file2, O_RDONLY|O_NOFOLLOW)) == -1)
                fatal("cvs_file_cmp: open: `%s': %s", file2, strerror(errno));

        if (fstat(fd1, &stb1) == -1)
                fatal("cvs_file_cmp: `%s': %s", file1, strerror(errno));
        if (fstat(fd2, &stb2) == -1)
                fatal("cvs_file_cmp: `%s': %s", file2, strerror(errno));

        if (stb1.st_size != stb2.st_size ||
            (stb1.st_mode & S_IFMT) != (stb2.st_mode & S_IFMT)) {
                ret = 1;
                goto out;
        }

        if (S_ISBLK(stb1.st_mode) || S_ISCHR(stb1.st_mode)) {
                if (stb1.st_rdev != stb2.st_rdev)
                        ret = 1;
                goto out;
        }

        if (S_ISREG(stb1.st_mode)) {
                void *p1, *p2;

                if ((uintmax_t)stb1.st_size > SIZE_MAX) {
                        ret = 1;
                        goto out;
                }

                if ((p1 = mmap(NULL, stb1.st_size, PROT_READ,
                    MAP_FILE, fd1, (off_t)0)) == MAP_FAILED)
                        fatal("cvs_file_cmp: mmap failed");

                if ((p2 = mmap(NULL, stb1.st_size, PROT_READ,
                    MAP_FILE, fd2, (off_t)0)) == MAP_FAILED)
                        fatal("cvs_file_cmp: mmap failed");

                madvise(p1, stb1.st_size, MADV_SEQUENTIAL);
                madvise(p2, stb1.st_size, MADV_SEQUENTIAL);

                ret = memcmp(p1, p2, stb1.st_size);

                (void)munmap(p1, stb1.st_size);
                (void)munmap(p2, stb1.st_size);
        }

out:
        (void)close(fd1);
        (void)close(fd2);

        return (ret);
}

int
cvs_file_copy(const char *from, const char *to)
{
        struct stat st;
        struct timespec ts[2];
        int src, dst, ret;

        ret = 0;

        cvs_log(LP_TRACE, "cvs_file_copy(%s,%s)", from, to);

        if (cvs_noexec == 1)
                return (0);

        if ((src = open(from, O_RDONLY)) == -1)
                fatal("cvs_file_copy: open: `%s': %s", from, strerror(errno));

        if (fstat(src, &st) == -1)
                fatal("cvs_file_copy: `%s': %s", from, strerror(errno));

        if (S_ISREG(st.st_mode)) {
                char *p;
                int saved_errno;

                if ((uintmax_t)st.st_size > SIZE_MAX) {
                        ret = -1;
                        goto out;
                }

                if ((dst = open(to, O_CREAT|O_TRUNC|O_WRONLY,
                    st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO))) == -1)
                        fatal("cvs_file_copy: open `%s': %s",
                            to, strerror(errno));

                if ((p = mmap(NULL, st.st_size, PROT_READ,
                    MAP_FILE, src, (off_t)0)) == MAP_FAILED) {
                        saved_errno = errno;
                        (void)unlink(to);
                        fatal("cvs_file_copy: mmap: %s", strerror(saved_errno));
                }

                madvise(p, st.st_size, MADV_SEQUENTIAL);

                if (atomicio(vwrite, dst, p, st.st_size) != (size_t)st.st_size) {
                        saved_errno = errno;
                        (void)unlink(to);
                        fatal("cvs_file_copy: `%s': %s", from,
                            strerror(saved_errno));
                }

                (void)munmap(p, st.st_size);

                ts[0] = st.st_atim;
                ts[1] = st.st_mtim;

                if (futimens(dst, ts) == -1) {
                        saved_errno = errno;
                        (void)unlink(to);
                        fatal("cvs_file_copy: futimes: %s",
                            strerror(saved_errno));
                }
                (void)close(dst);
        }
out:
        (void)close(src);

        return (ret);
}

int
cvs_filelist_cmp(struct cvs_filelist *f1, struct cvs_filelist *f2)
{
        return (strcmp(f1->file_path, f2->file_path));
}