/*      $OpenBSD: quot.c,v 1.33 2024/04/23 13:34:51 jsg Exp $   */

/*
 * Copyright (C) 1991, 1994 Wolfgang Solfrank.
 * Copyright (C) 1991, 1994 TooLs GmbH.
 * 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. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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/param.h>  /* DEV_BSIZE MAXBSIZE */
#include <sys/mount.h>
#include <sys/time.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <pwd.h>
#include <unistd.h>

/* some flags of what to do: */
static char estimate;
static char count;
static char unused;
static void (*func)(int, struct fs *, char *);
static int cmpusers(const void *, const void *);
void    quot(char *, char *);
static long blocksize;
static char *header;
static int headerlen;

#define SIZE(n) (howmany(((off_t)(n)) * DEV_BSIZE, blocksize))

#define INOCNT(fs)      ((fs)->fs_ipg)
#define INOSZ(fs)       (((fs)->fs_magic == FS_UFS1_MAGIC ? \
                            sizeof(struct ufs1_dinode) : \
                            sizeof(struct ufs2_dinode)) * INOCNT(fs))

union dinode {
        struct ufs1_dinode dp1;
        struct ufs2_dinode dp2;
};
#define DIP(fs, dp, field) \
        (((fs)->fs_magic == FS_UFS1_MAGIC) ? \
        (dp)->dp1.field : (dp)->dp2.field)

static union dinode *
get_inode(int fd, struct fs *super, ino_t ino)
{
        static caddr_t ipbuf;
        static struct cg *cgp;
        static ino_t last;
        static int cg;
        struct ufs2_dinode *di2;

        if (fd < 0) {           /* flush cache */
                if (ipbuf) {
                        free(ipbuf);
                        ipbuf = NULL;
                        if (super != NULL && super->fs_magic == FS_UFS2_MAGIC) {
                                free(cgp);
                                cgp = NULL;
                        }
                }
                return 0;
        }

        if (!ipbuf || ino < last || ino >= last + INOCNT(super)) {
                if (super->fs_magic == FS_UFS2_MAGIC &&
                    (!cgp || cg != ino_to_cg(super, ino))) {
                        cg = ino_to_cg(super, ino);
                        if (!cgp && !(cgp = malloc(super->fs_cgsize)))
                                errx(1, "allocate cg");
                        if (pread(fd, cgp, super->fs_cgsize,
                            (off_t)cgtod(super, cg) << super->fs_fshift)
                            != super->fs_cgsize)
                                if (read(fd, cgp, super->fs_cgsize) !=
                                    super->fs_cgsize)
                                        err(1, "read cg");
                        if (!cg_chkmagic(cgp))
                                errx(1, "cg has bad magic");
                }
                if (!ipbuf && !(ipbuf = malloc(INOSZ(super))))
                        err(1, "allocate inodes");
                last = (ino / INOCNT(super)) * INOCNT(super);
                if (lseek(fd, (off_t)ino_to_fsba(super, last)
                    << super->fs_fshift, SEEK_SET) < 0 ||
                    read(fd, ipbuf, INOSZ(super)) != INOSZ(super)) {
                        err(1, "read inodes");
                }
        }

        if (super->fs_magic == FS_UFS1_MAGIC)
                return ((union dinode *)
                    &((struct ufs1_dinode *)ipbuf)[ino % INOCNT(super)]);
        di2 = &((struct ufs2_dinode *)ipbuf)[ino % INOCNT(super)];
        /* If the inode is unused, it might be unallocated too, so zero it. */
        if (isclr(cg_inosused(cgp), ino % super->fs_ipg))
                memset(di2, 0, sizeof(*di2));
        return ((union dinode *)di2);
}

#define actualblocks(fs, ip)    DIP(fs, dp, di_blocks)

static int
virtualblocks(struct fs *super, union dinode *dp)
{
        off_t nblk, sz;

        sz = DIP(super, dp, di_size);

        if (lblkno(super, sz) >= NDADDR) {
                nblk = blkroundup(super, sz);
                sz = lblkno(super, nblk);
                sz = howmany(sz - NDADDR, NINDIR(super));
                while (sz > 0) {
                        nblk += sz * super->fs_bsize;
                        /* One block on this level is in the inode itself */
                        sz = howmany(sz - 1, NINDIR(super));
                }
        } else
                nblk = fragroundup(super, sz);

        return nblk / DEV_BSIZE;
}

static int
isfree(struct fs *super, union dinode *dp)
{
        switch (DIP(super, dp, di_mode) & IFMT) {
        case IFIFO:
        case IFLNK:             /* should check FASTSYMLINK? */
        case IFDIR:
        case IFREG:
                return 0;
        case IFCHR:
        case IFBLK:
        case IFSOCK:
        case 0:
                return 1;
        default:
                errx(1, "unknown IFMT 0%o", DIP(super, dp, di_mode) & IFMT);
        }
}

static struct user {
        uid_t uid;
        char *name;
        daddr_t space;
        long count;
        daddr_t spc30;
        daddr_t spc60;
        daddr_t spc90;
} *users;
static int nusers;

static void
inituser(void)
{
        int i;
        struct user *usr;

        if (!nusers) {
                nusers = 8;
                if (!(users = calloc(nusers, sizeof(struct user)))) {
                        err(1, "allocate users");
                }
        } else {
                for (usr = users, i = nusers; --i >= 0; usr++) {
                        usr->space = usr->spc30 = usr->spc60 = usr->spc90 = 0;
                        usr->count = 0;
                }
        }
}

static void
usrrehash(void)
{
        int i;
        struct user *usr, *usrn;
        struct user *svusr;

        svusr = users;
        nusers <<= 1;
        if (!(users = calloc(nusers, sizeof(struct user))))
                err(1, "allocate users");
        for (usr = svusr, i = nusers >> 1; --i >= 0; usr++) {
                for (usrn = users + (usr->uid&(nusers - 1));
                     usrn->name;
                    usrn--) {
                        if (usrn <= users)
                                usrn = users + nusers;
                }
                *usrn = *usr;
        }
}

static struct user *
user(uid_t uid)
{
        int i;
        struct user *usr;
        const char *name;

        while (1) {
                for (usr = users + (uid&(nusers - 1)), i = nusers;
                     --i >= 0;
                    usr--) {
                        if (!usr->name) {
                                usr->uid = uid;

                                if ((name = user_from_uid(uid, 1)) == NULL)
                                        asprintf(&usr->name, "#%u", uid);
                                else
                                        usr->name = strdup(name);
                                if (!usr->name)
                                        err(1, "allocate users");
                                return usr;
                        } else if (usr->uid == uid)
                                return usr;

                        if (usr <= users)
                                usr = users + nusers;
                }
                usrrehash();
        }
}

static int
cmpusers(const void *v1, const void *v2)
{
        const struct user *u1 = v1, *u2 = v2;

        return u2->space - u1->space;
}

#define sortusers(users)        (qsort((users), nusers, sizeof(struct user), \
                                    cmpusers))

static void
uses(uid_t uid, daddr_t blks, time_t act)
{
        static time_t today;
        struct user *usr;

        if (!today)
                time(&today);

        usr = user(uid);
        usr->count++;
        usr->space += blks;

        if (today - act > 90L * 24L * 60L * 60L)
                usr->spc90 += blks;
        if (today - act > 60L * 24L * 60L * 60L)
                usr->spc60 += blks;
        if (today - act > 30L * 24L * 60L * 60L)
                usr->spc30 += blks;
}

#define FSZCNT  512
struct fsizes {
        struct fsizes *fsz_next;
        daddr_t fsz_first, fsz_last;
        ino_t fsz_count[FSZCNT];
        daddr_t fsz_sz[FSZCNT];
} *fsizes;

static void
initfsizes(void)
{
        struct fsizes *fp;
        int i;

        for (fp = fsizes; fp; fp = fp->fsz_next) {
                for (i = FSZCNT; --i >= 0;) {
                        fp->fsz_count[i] = 0;
                        fp->fsz_sz[i] = 0;
                }
        }
}

static void
dofsizes(int fd, struct fs *super, char *name)
{
        ino_t inode, maxino;
        union dinode *dp;
        daddr_t sz, ksz;
        struct fsizes *fp, **fsp;
        int i;

        maxino = super->fs_ncg * super->fs_ipg - 1;
        for (inode = 0; inode < maxino; inode++) {
                errno = 0;
                if ((dp = get_inode(fd, super, inode))
                    && !isfree(super, dp)
                    ) {
                        sz = estimate ? virtualblocks(super, dp) :
                            actualblocks(super, dp);
                        ksz = SIZE(sz);
                        for (fsp = &fsizes; (fp = *fsp); fsp = &fp->fsz_next) {
                                if (ksz < fp->fsz_last)
                                        break;
                        }
                        if (!fp || ksz < fp->fsz_first) {
                                if (!(fp = (struct fsizes *)
                                    malloc(sizeof(struct fsizes)))) {
                                        err(1, "alloc fsize structure");
                                }
                                fp->fsz_next = *fsp;
                                *fsp = fp;
                                fp->fsz_first = (ksz / FSZCNT) * FSZCNT;
                                fp->fsz_last = fp->fsz_first + FSZCNT;
                                for (i = FSZCNT; --i >= 0;) {
                                        fp->fsz_count[i] = 0;
                                        fp->fsz_sz[i] = 0;
                                }
                        }
                        fp->fsz_count[ksz % FSZCNT]++;
                        fp->fsz_sz[ksz % FSZCNT] += sz;
                } else if (errno)
                        err(1, "%s", name);
        }
        sz = 0;
        for (fp = fsizes; fp; fp = fp->fsz_next) {
                for (i = 0; i < FSZCNT; i++) {
                        if (fp->fsz_count[i])
                                printf("%lld\t%llu\t%lld\n",
                                    (long long)fp->fsz_first + i,
                                    (unsigned long long)fp->fsz_count[i],
                                    SIZE(sz += fp->fsz_sz[i]));
                }
        }
}

static void
douser(int fd, struct fs *super, char *name)
{
        ino_t inode, maxino;
        struct user *usr, *usrs;
        union dinode *dp;
        int n;

        setpassent(1);

        maxino = super->fs_ncg * super->fs_ipg - 1;
        for (inode = 0; inode < maxino; inode++) {
                errno = 0;
                if ((dp = get_inode(fd,super,inode))
                    && !isfree(super, dp))
                        uses(DIP(super, dp, di_uid),
                            estimate ? virtualblocks(super, dp) :
                                actualblocks(super, dp),
                            DIP(super, dp, di_atime));
                else if (errno)
                        err(1, "%s", name);
        }
        if (!(usrs = calloc(nusers, sizeof(struct user))))
                err(1, "allocate users");
        memcpy(usrs, users, nusers * sizeof(struct user));
        sortusers(usrs);
        for (usr = usrs, n = nusers; --n >= 0 && usr->count; usr++) {
                printf("%14lld", SIZE(usr->space));
                if (count)
                        printf("\t%5ld", usr->count);
                printf("\t%-8s", usr->name);
                if (unused)
                        printf("\t%14lld\t%14lld\t%14lld",
                               SIZE(usr->spc30),
                               SIZE(usr->spc60),
                               SIZE(usr->spc90));
                printf("\n");
        }
        free(usrs);
}

static void
donames(int fd, struct fs *super, char *name)
{
        int c;
        unsigned long long inode;
        ino_t inode1;
        ino_t maxino;
        union dinode *dp;

        maxino = super->fs_ncg * super->fs_ipg - 1;
        /* first skip the name of the filesystem */
        while ((c = getchar()) != EOF && (c < '0' || c > '9'))
                while ((c = getchar()) != EOF && c != '\n');
        ungetc(c, stdin);
        inode1 = -1;
        while (scanf("%llu", &inode) == 1) {
                if (inode > maxino) {
                        fprintf(stderr, "invalid inode %llu\n",
                            (unsigned long long)inode);
                        return;
                }
                errno = 0;
                if ((dp = get_inode(fd, super, inode)) && !isfree(super, dp)) {
                        printf("%s\t", user(DIP(super, dp, di_uid))->name);
                        /* now skip whitespace */
                        while ((c = getchar()) == ' ' || c == '\t');
                        /* and print out the remainder of the input line */
                        while (c != EOF && c != '\n') {
                                putchar(c);
                                c = getchar();
                        }
                        putchar('\n');
                        inode1 = inode;
                } else {
                        if (errno)
                                err(1, "%s", name);
                        /* skip this line */
                        while ((c = getchar()) != EOF && c != '\n')
                                ;
                }
                if (c == EOF)
                        break;
        }
}

static void
usage(void)
{
        fprintf(stderr, "usage: quot [-acfhknv] [filesystem ...]\n");
        exit(1);
}

/*
 * Possible superblock locations ordered from most to least likely.
 */
static int sblock_try[] = SBLOCKSEARCH;
static char superblock[SBLOCKSIZE];

#define max(a,b)        MAX((a),(b))
/*
 * Sanity checks for old file systems.
 * Stolen from <sys/lib/libsa/ufs.c>
 */
static void
ffs_oldfscompat(struct fs *fs)
{
        int i;

        fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect);       /* XXX */
        fs->fs_interleave = max(fs->fs_interleave, 1);          /* XXX */
        if (fs->fs_postblformat == FS_42POSTBLFMT)              /* XXX */
                fs->fs_nrpos = 8;                               /* XXX */
        if (fs->fs_inodefmt < FS_44INODEFMT) {                  /* XXX */
                quad_t sizepb = fs->fs_bsize;                   /* XXX */
                                                                /* XXX */
                fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
                for (i = 0; i < NIADDR; i++) {                  /* XXX */
                        sizepb *= NINDIR(fs);                   /* XXX */
                        fs->fs_maxfilesize += sizepb;           /* XXX */
                }                                               /* XXX */
                fs->fs_qbmask = ~fs->fs_bmask;                  /* XXX */
                fs->fs_qfmask = ~fs->fs_fmask;                  /* XXX */
        }                                                       /* XXX */
}

void
quot(char *name, char *mp)
{
        int i, fd;
        struct fs *fs;

        get_inode(-1, NULL, 0);         /* flush cache */
        inituser();
        initfsizes();
        /*
         * XXX this is completely broken.  Of course you can't read a
         * directory, well, not anymore.  How to fix this, though...
         */
        if ((fd = open(name, O_RDONLY)) < 0) {
                warn("%s", name);
                return;
        }
        for (i = 0; sblock_try[i] != -1; i++) {
                if (lseek(fd, sblock_try[i], 0) != sblock_try[i]) {
                        close(fd);
                        return;
                }
                if (read(fd, superblock, SBLOCKSIZE) != SBLOCKSIZE) {
                        close(fd);
                        return;
                }
                fs = (struct fs *)superblock;
                if ((fs->fs_magic == FS_UFS1_MAGIC ||
                    (fs->fs_magic == FS_UFS2_MAGIC &&
                    fs->fs_sblockloc == sblock_try[i])) &&
                    fs->fs_bsize <= MAXBSIZE &&
                    fs->fs_bsize >= sizeof(struct fs))
                        break;
        }
        if (sblock_try[i] == -1) {
                warnx("%s: not a BSD filesystem", name);
                close(fd);
                return;
        }
        ffs_oldfscompat(fs);
        printf("%s:", name);
        if (mp)
                printf(" (%s)", mp);
        putchar('\n');
        (*func)(fd, fs, name);
        close(fd);
}

int
main(int argc, char *argv[])
{
        int cnt, all, i;
        char dev[MNAMELEN], *nm, *mountpoint, *cp;
        struct statfs *mp;

        all = 0;
        func = douser;
        header = getbsize(&headerlen, &blocksize);
        while (--argc > 0 && **++argv == '-') {
                while (*++*argv) {
                        switch (**argv) {
                        case 'n':
                                func = donames;
                                break;
                        case 'c':
                                func = dofsizes;
                                break;
                        case 'a':
                                all = 1;
                                break;
                        case 'f':
                                count = 1;
                                break;
                        case 'h':
                                estimate = 1;
                                break;
                        case 'k':
                                blocksize = 1024;
                                break;
                        case 'v':
                                unused = 1;
                                break;
                        default:
                                usage();
                        }
                }
        }

        if (pledge("stdio rpath getpw", NULL) == -1)
                err(1, "pledge");

        cnt = getmntinfo(&mp, MNT_NOWAIT);
        if (all) {
                for (; --cnt >= 0; mp++) {
                        if (strcmp(mp->f_fstypename, MOUNT_FFS) == 0 ||
                            strcmp(mp->f_fstypename, "ufs") == 0) {
                                if ((nm = strrchr(mp->f_mntfromname, '/'))) {
                                        snprintf(dev, sizeof(dev), "%sr%s",
                                            _PATH_DEV, nm + 1);
                                        nm = dev;
                                } else
                                        nm = mp->f_mntfromname;
                                quot(nm, mp->f_mntonname);
                        }
                }
        }
        for (; --argc >= 0; argv++) {
                mountpoint = NULL;
                nm = *argv;

                /* Remove trailing slashes from name. */
                cp = nm + strlen(nm);
                while (*(--cp) == '/' && cp != nm)
                        *cp = '\0';

                /* Look up the name in the mount table. */
                for (i = 0; i < cnt; i++) {
                        /* Remove trailing slashes from name. */
                        cp = mp[i].f_mntonname + strlen(mp[i].f_mntonname);
                        while (*(--cp) == '/' && cp != mp[i].f_mntonname)
                                *cp = '\0';

                        if ((!strcmp(mp->f_fstypename, MOUNT_FFS) ||
                             !strcmp(mp->f_fstypename, MOUNT_MFS) ||
                             !strcmp(mp->f_fstypename, "ufs")) &&
                            strcmp(nm, mp[i].f_mntonname) == 0) {
                                nm = mp[i].f_mntfromname;
                                mountpoint = mp[i].f_mntonname;
                                break;
                        }
                }

                /* Make sure we have the raw device... */
                if (strncmp(nm, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0 &&
                    nm[sizeof(_PATH_DEV) - 1] != 'r') {
                        snprintf(dev, sizeof(dev), "%sr%s", _PATH_DEV,
                            nm + sizeof(_PATH_DEV) - 1);
                        nm = dev;
                }
                quot(nm, mountpoint);
        }
        exit(0);
}