BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.sbin / edquota / edquota.c

/*
* Copyright (c) 1980, 1990 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Robert Elz at The University of Melbourne.
*
* 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 the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1990 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)edquota.c   5.15 (Berkeley) 9/27/90";
#endif /* not lint */

/*
* Disk quota editor.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/wait.h>
#include <ufs/quota.h>
#include <errno.h>
#include <fstab.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include "pathnames.h"

char *qfname = QUOTAFILENAME;
char *qfextension[] = INITQFNAMES;
char *quotagroup = QUOTAGROUP;
char tmpfil[] = _PATH_TMP;

struct quotause {
       struct  quotause *next;
       long    flags;
       struct  dqblk dqblk;
       char    fsname[MAXPATHLEN + 1];
       char    qfname[1];      /* actually longer */
} *getprivs();
#define FOUND   0x01

main(argc, argv)
       register char **argv;
       int argc;
{
       register struct quotause *qup, *protoprivs, *curprivs;
       extern char *optarg;
       extern int optind;
       register long id, protoid;
       register int quotatype, tmpfd;
       char *protoname, ch;
       int tflag = 0, pflag = 0;

       if (argc < 2)
               usage();
       if (getuid()) {
               fprintf(stderr, "edquota: permission denied\n");
               exit(1);
       }
       quotatype = USRQUOTA;
       while ((ch = getopt(argc, argv, "ugtp:")) != EOF) {
               switch(ch) {
               case 'p':
                       protoname = optarg;
                       pflag++;
                       break;
               case 'g':
                       quotatype = GRPQUOTA;
                       break;
               case 'u':
                       quotatype = USRQUOTA;
                       break;
               case 't':
                       tflag++;
                       break;
               default:
                       usage();
               }
       }
       argc -= optind;
       argv += optind;
       if (pflag) {
               if ((protoid = getentry(protoname, quotatype)) == -1)
                       exit(1);
               protoprivs = getprivs(protoid, quotatype);
               for (qup = protoprivs; qup; qup = qup->next) {
                       qup->dqblk.dqb_btime = 0;
                       qup->dqblk.dqb_itime = 0;
               }
               while (argc-- > 0) {
                       if ((id = getentry(*argv++, quotatype)) < 0)
                               continue;
                       putprivs(id, quotatype, protoprivs);
               }
               exit(0);
       }
       tmpfd = mkstemp(tmpfil);
       fchown(tmpfd, getuid(), getgid());
       if (tflag) {
               protoprivs = getprivs(0, quotatype);
               if (writetimes(protoprivs, tmpfd, quotatype) == 0)
                       exit(1);
               if (editit(tmpfil) && readtimes(protoprivs, tmpfd))
                       putprivs(0, quotatype, protoprivs);
               freeprivs(protoprivs);
               exit(0);
       }
       for ( ; argc > 0; argc--, argv++) {
               if ((id = getentry(*argv, quotatype)) == -1)
                       continue;
               curprivs = getprivs(id, quotatype);
               if (writeprivs(curprivs, tmpfd, *argv, quotatype) == 0)
                       continue;
               if (editit(tmpfil) && readprivs(curprivs, tmpfd))
                       putprivs(id, quotatype, curprivs);
               freeprivs(curprivs);
       }
       close(tmpfd);
       unlink(tmpfil);
       exit(0);
}

usage()
{
       fprintf(stderr, "%s%s%s%s",
               "Usage: edquota [-u] [-p username] username ...\n",
               "\tedquota -g [-p groupname] groupname ...\n",
               "\tedquota [-u] -t\n", "\tedquota -g -t\n");
       exit(1);
}

/*
* This routine converts a name for a particular quota type to
* an identifier. This routine must agree with the kernel routine
* getinoquota as to the interpretation of quota types.
*/
getentry(name, quotatype)
       char *name;
       int quotatype;
{
       struct passwd *pw;
       struct group *gr;

       if (alldigits(name))
               return (atoi(name));
       switch(quotatype) {
       case USRQUOTA:
               if (pw = getpwnam(name))
                       return (pw->pw_uid);
               fprintf(stderr, "%s: no such user\n", name);
               break;
       case GRPQUOTA:
               if (gr = getgrnam(name))
                       return (gr->gr_gid);
               fprintf(stderr, "%s: no such group\n", name);
               break;
       default:
               fprintf(stderr, "%d: unknown quota type\n", quotatype);
               break;
       }
       sleep(1);
       return (-1);
}

/*
* Collect the requested quota information.
*/
struct quotause *
getprivs(id, quotatype)
       register long id;
       int quotatype;
{
       register struct fstab *fs;
       register struct quotause *qup, *quptail;
       struct quotause *quphead;
       int qcmd, qupsize, fd;
       char *qfpathname;
       static int warned = 0;
       extern int errno;

       setfsent();
       quphead = (struct quotause *)0;
       qcmd = QCMD(Q_GETQUOTA, quotatype);
       while (fs = getfsent()) {
               if (strcmp(fs->fs_vfstype, "ufs"))
                       continue;
               if (!hasquota(fs, quotatype, &qfpathname))
                       continue;
               qupsize = sizeof(*qup) + strlen(qfpathname);
               if ((qup = (struct quotause *)malloc(qupsize)) == NULL) {
                       fprintf(stderr, "edquota: out of memory\n");
                       exit(2);
               }
               if (quotactl(fs->fs_file, qcmd, id, &qup->dqblk) != 0) {
                       if (errno == EOPNOTSUPP && !warned) {
                               warned++;
                               fprintf(stderr, "Warning: %s\n",
                                   "Quotas are not compiled into this kernel");
                               sleep(3);
                       }
                       if ((fd = open(qfpathname, O_RDONLY)) < 0) {
                               fd = open(qfpathname, O_RDWR|O_CREAT, 0640);
                               if (fd < 0 && errno != ENOENT) {
                                       perror(qfpathname);
                                       free(qup);
                                       continue;
                               }
                               fprintf(stderr, "Creating quota file %s\n",
                                   qfpathname);
                               sleep(3);
                               (void) fchown(fd, getuid(),
                                   getentry(quotagroup, GRPQUOTA));
                               (void) fchmod(fd, 0640);
                       }
                       lseek(fd, (long)(id * sizeof(struct dqblk)), L_SET);
                       switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
                       case 0:                 /* EOF */
                               /*
                                * Convert implicit 0 quota (EOF)
                                * into an explicit one (zero'ed dqblk)
                                */
                               bzero((caddr_t)&qup->dqblk,
                                   sizeof(struct dqblk));
                               break;

                       case sizeof(struct dqblk):      /* OK */
                               break;

                       default:                /* ERROR */
                               fprintf(stderr, "edquota: read error in ");
                               perror(qfpathname);
                               close(fd);
                               free(qup);
                               continue;
                       }
                       close(fd);
               }
               strcpy(qup->qfname, qfpathname);
               strcpy(qup->fsname, fs->fs_file);
               if (quphead == NULL)
                       quphead = qup;
               else
                       quptail->next = qup;
               quptail = qup;
               qup->next = 0;
       }
       endfsent();
       return (quphead);
}

/*
* Store the requested quota information.
*/
putprivs(id, quotatype, quplist)
       long id;
       int quotatype;
       struct quotause *quplist;
{
       register struct quotause *qup;
       int qcmd, fd;

       qcmd = QCMD(Q_SETQUOTA, quotatype);
       for (qup = quplist; qup; qup = qup->next) {
               if (quotactl(qup->fsname, qcmd, id, &qup->dqblk) == 0)
                       continue;
               if ((fd = open(qup->qfname, O_WRONLY)) < 0) {
                       perror(qup->qfname);
               } else {
                       lseek(fd, (long)id * (long)sizeof (struct dqblk), 0);
                       if (write(fd, &qup->dqblk, sizeof (struct dqblk)) !=
                           sizeof (struct dqblk)) {
                               fprintf(stderr, "edquota: ");
                               perror(qup->qfname);
                       }
                       close(fd);
               }
       }
}

/*
* Take a list of priviledges and get it edited.
*/
editit(tmpfile)
       char *tmpfile;
{
       long omask;
       int pid, stat;
       extern char *getenv();

       omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
top:
       if ((pid = fork()) < 0) {
               extern errno;

               if (errno == EPROCLIM) {
                       fprintf(stderr, "You have too many processes\n");
                       return(0);
               }
               if (errno == EAGAIN) {
                       sleep(1);
                       goto top;
               }
               perror("fork");
               return (0);
       }
       if (pid == 0) {
               register char *ed;

               sigsetmask(omask);
               setgid(getgid());
               setuid(getuid());
               if ((ed = getenv("EDITOR")) == (char *)0)
                       ed = _PATH_VI;
               execlp(ed, ed, tmpfile, 0);
               perror(ed);
               exit(1);
       }
       waitpid(pid, &stat, 0);
       sigsetmask(omask);
       if (!WIFEXITED(stat) || WEXITSTATUS(stat) != 0)
               return (0);
       return (1);
}

/*
* Convert a quotause list to an ASCII file.
*/
writeprivs(quplist, outfd, name, quotatype)
       struct quotause *quplist;
       int outfd;
       char *name;
       int quotatype;
{
       register struct quotause *qup;
       FILE *fd;

       ftruncate(outfd, 0);
       lseek(outfd, 0, L_SET);
       if ((fd = fdopen(dup(outfd), "w")) == NULL) {
               fprintf(stderr, "edquota: ");
               perror(tmpfil);
               exit(1);
       }
       fprintf(fd, "Quotas for %s %s:\n", qfextension[quotatype], name);
       for (qup = quplist; qup; qup = qup->next) {
               fprintf(fd, "%s: %s %d, limits (soft = %d, hard = %d)\n",
                   qup->fsname, "blocks in use:",
                   dbtob(qup->dqblk.dqb_curblocks) / 1024,
                   dbtob(qup->dqblk.dqb_bsoftlimit) / 1024,
                   dbtob(qup->dqblk.dqb_bhardlimit) / 1024);
               fprintf(fd, "%s %d, limits (soft = %d, hard = %d)\n",
                   "\tinodes in use:", qup->dqblk.dqb_curinodes,
                   qup->dqblk.dqb_isoftlimit, qup->dqblk.dqb_ihardlimit);
       }
       fclose(fd);
       return (1);
}

/*
* Merge changes to an ASCII file into a quotause list.
*/
readprivs(quplist, infd)
       struct quotause *quplist;
       int infd;
{
       register struct quotause *qup;
       FILE *fd;
       int cnt;
       register char *cp;
       struct dqblk dqblk;
       char *fsp, line1[BUFSIZ], line2[BUFSIZ];

       lseek(infd, 0, L_SET);
       fd = fdopen(dup(infd), "r");
       if (fd == NULL) {
               fprintf(stderr, "Can't re-read temp file!!\n");
               return (0);
       }
       /*
        * Discard title line, then read pairs of lines to process.
        */
       (void) fgets(line1, sizeof (line1), fd);
       while (fgets(line1, sizeof (line1), fd) != NULL &&
              fgets(line2, sizeof (line2), fd) != NULL) {
               if ((fsp = strtok(line1, " \t:")) == NULL) {
                       fprintf(stderr, "%s: bad format\n", line1);
                       return (0);
               }
               if ((cp = strtok((char *)0, "\n")) == NULL) {
                       fprintf(stderr, "%s: %s: bad format\n", fsp,
                           &fsp[strlen(fsp) + 1]);
                       return (0);
               }
               cnt = sscanf(cp,
                   " blocks in use: %d, limits (soft = %d, hard = %d)",
                   &dqblk.dqb_curblocks, &dqblk.dqb_bsoftlimit,
                   &dqblk.dqb_bhardlimit);
               if (cnt != 3) {
                       fprintf(stderr, "%s:%s: bad format\n", fsp, cp);
                       return (0);
               }
               dqblk.dqb_curblocks = btodb(dqblk.dqb_curblocks * 1024);
               dqblk.dqb_bsoftlimit = btodb(dqblk.dqb_bsoftlimit * 1024);
               dqblk.dqb_bhardlimit = btodb(dqblk.dqb_bhardlimit * 1024);
               if ((cp = strtok(line2, "\n")) == NULL) {
                       fprintf(stderr, "%s: %s: bad format\n", fsp, line2);
                       return (0);
               }
               cnt = sscanf(cp,
                   "\tinodes in use: %d, limits (soft = %d, hard = %d)",
                   &dqblk.dqb_curinodes, &dqblk.dqb_isoftlimit,
                   &dqblk.dqb_ihardlimit);
               if (cnt != 3) {
                       fprintf(stderr, "%s: %s: bad format\n", fsp, line2);
                       return (0);
               }
               for (qup = quplist; qup; qup = qup->next) {
                       if (strcmp(fsp, qup->fsname))
                               continue;
                       /*
                        * Cause time limit to be reset when the quota
                        * is next used if previously had no soft limit
                        * or were under it, but now have a soft limit
                        * and are over it.
                        */
                       if (dqblk.dqb_bsoftlimit &&
                           qup->dqblk.dqb_curblocks >= dqblk.dqb_bsoftlimit &&
                           (qup->dqblk.dqb_bsoftlimit == 0 ||
                            qup->dqblk.dqb_curblocks <
                            qup->dqblk.dqb_bsoftlimit))
                               qup->dqblk.dqb_btime = 0;
                       if (dqblk.dqb_isoftlimit &&
                           qup->dqblk.dqb_curinodes >= dqblk.dqb_isoftlimit &&
                           (qup->dqblk.dqb_isoftlimit == 0 ||
                            qup->dqblk.dqb_curinodes <
                            qup->dqblk.dqb_isoftlimit))
                               qup->dqblk.dqb_itime = 0;
                       qup->dqblk.dqb_bsoftlimit = dqblk.dqb_bsoftlimit;
                       qup->dqblk.dqb_bhardlimit = dqblk.dqb_bhardlimit;
                       qup->dqblk.dqb_isoftlimit = dqblk.dqb_isoftlimit;
                       qup->dqblk.dqb_ihardlimit = dqblk.dqb_ihardlimit;
                       qup->flags |= FOUND;
                       if (dqblk.dqb_curblocks == qup->dqblk.dqb_curblocks &&
                           dqblk.dqb_curinodes == qup->dqblk.dqb_curinodes)
                               break;
                       fprintf(stderr,
                           "%s: cannot change current allocation\n", fsp);
                       break;
               }
       }
       fclose(fd);
       /*
        * Disable quotas for any filesystems that have not been found.
        */
       for (qup = quplist; qup; qup = qup->next) {
               if (qup->flags & FOUND) {
                       qup->flags &= ~FOUND;
                       continue;
               }
               qup->dqblk.dqb_bsoftlimit = 0;
               qup->dqblk.dqb_bhardlimit = 0;
               qup->dqblk.dqb_isoftlimit = 0;
               qup->dqblk.dqb_ihardlimit = 0;
       }
       return (1);
}

/*
* Convert a quotause list to an ASCII file of grace times.
*/
writetimes(quplist, outfd, quotatype)
       struct quotause *quplist;
       int outfd;
       int quotatype;
{
       register struct quotause *qup;
       char *cvtstoa();
       FILE *fd;

       ftruncate(outfd, 0);
       lseek(outfd, 0, L_SET);
       if ((fd = fdopen(dup(outfd), "w")) == NULL) {
               fprintf(stderr, "edquota: ");
               perror(tmpfil);
               exit(1);
       }
       fprintf(fd, "Time units may be: days, hours, minutes, or seconds\n");
       fprintf(fd, "Grace period before enforcing soft limits for %ss:\n",
           qfextension[quotatype]);
       for (qup = quplist; qup; qup = qup->next) {
               fprintf(fd, "%s: block grace period: %s, ",
                   qup->fsname, cvtstoa(qup->dqblk.dqb_btime));
               fprintf(fd, "file grace period: %s\n",
                   cvtstoa(qup->dqblk.dqb_itime));
       }
       fclose(fd);
       return (1);
}

/*
* Merge changes of grace times in an ASCII file into a quotause list.
*/
readtimes(quplist, infd)
       struct quotause *quplist;
       int infd;
{
       register struct quotause *qup;
       FILE *fd;
       int cnt;
       register char *cp;
       time_t itime, btime, iseconds, bseconds;
       char *fsp, bunits[10], iunits[10], line1[BUFSIZ];

       lseek(infd, 0, L_SET);
       fd = fdopen(dup(infd), "r");
       if (fd == NULL) {
               fprintf(stderr, "Can't re-read temp file!!\n");
               return (0);
       }
       /*
        * Discard two title lines, then read lines to process.
        */
       (void) fgets(line1, sizeof (line1), fd);
       (void) fgets(line1, sizeof (line1), fd);
       while (fgets(line1, sizeof (line1), fd) != NULL) {
               if ((fsp = strtok(line1, " \t:")) == NULL) {
                       fprintf(stderr, "%s: bad format\n", line1);
                       return (0);
               }
               if ((cp = strtok((char *)0, "\n")) == NULL) {
                       fprintf(stderr, "%s: %s: bad format\n", fsp,
                           &fsp[strlen(fsp) + 1]);
                       return (0);
               }
               cnt = sscanf(cp,
                   " block grace period: %d %s file grace period: %d %s",
                   &btime, bunits, &itime, iunits);
               if (cnt != 4) {
                       fprintf(stderr, "%s:%s: bad format\n", fsp, cp);
                       return (0);
               }
               if (cvtatos(btime, bunits, &bseconds) == 0)
                       return (0);
               if (cvtatos(itime, iunits, &iseconds) == 0)
                       return (0);
               for (qup = quplist; qup; qup = qup->next) {
                       if (strcmp(fsp, qup->fsname))
                               continue;
                       qup->dqblk.dqb_btime = bseconds;
                       qup->dqblk.dqb_itime = iseconds;
                       qup->flags |= FOUND;
                       break;
               }
       }
       fclose(fd);
       /*
        * reset default grace periods for any filesystems
        * that have not been found.
        */
       for (qup = quplist; qup; qup = qup->next) {
               if (qup->flags & FOUND) {
                       qup->flags &= ~FOUND;
                       continue;
               }
               qup->dqblk.dqb_btime = 0;
               qup->dqblk.dqb_itime = 0;
       }
       return (1);
}

/*
* Convert seconds to ASCII times.
*/
char *
cvtstoa(time)
       time_t time;
{
       static char buf[20];

       if (time % (24 * 60 * 60) == 0) {
               time /= 24 * 60 * 60;
               sprintf(buf, "%d day%s", time, time == 1 ? "" : "s");
       } else if (time % (60 * 60) == 0) {
               time /= 60 * 60;
               sprintf(buf, "%d hour%s", time, time == 1 ? "" : "s");
       } else if (time % 60 == 0) {
               time /= 60;
               sprintf(buf, "%d minute%s", time, time == 1 ? "" : "s");
       } else
               sprintf(buf, "%d second%s", time, time == 1 ? "" : "s");
       return (buf);
}

/*
* Convert ASCII input times to seconds.
*/
cvtatos(time, units, seconds)
       time_t time;
       char *units;
       time_t *seconds;
{

       if (bcmp(units, "second", 6) == 0)
               *seconds = time;
       else if (bcmp(units, "minute", 6) == 0)
               *seconds = time * 60;
       else if (bcmp(units, "hour", 4) == 0)
               *seconds = time * 60 * 60;
       else if (bcmp(units, "day", 3) == 0)
               *seconds = time * 24 * 60 * 60;
       else {
               printf("%s: bad units, specify %s\n", units,
                   "days, hours, minutes, or seconds");
               return (0);
       }
       return (1);
}

/*
* Free a list of quotause structures.
*/
freeprivs(quplist)
       struct quotause *quplist;
{
       register struct quotause *qup, *nextqup;

       for (qup = quplist; qup; qup = nextqup) {
               nextqup = qup->next;
               free(qup);
       }
}

/*
* Check whether a string is completely composed of digits.
*/
alldigits(s)
       register char *s;
{
       register c;

       c = *s++;
       do {
               if (!isdigit(c))
                       return (0);
       } while (c = *s++);
       return (1);
}

/*
* Check to see if a particular quota is to be enabled.
*/
hasquota(fs, type, qfnamep)
       register struct fstab *fs;
       int type;
       char **qfnamep;
{
       register char *opt;
       char *cp, *index(), *strtok();
       static char initname, usrname[100], grpname[100];
       static char buf[BUFSIZ];

       if (!initname) {
               sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
               sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
               initname = 1;
       }
       strcpy(buf, fs->fs_mntops);
       for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
               if (cp = index(opt, '='))
                       *cp++ = '\0';
               if (type == USRQUOTA && strcmp(opt, usrname) == 0)
                       break;
               if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
                       break;
       }
       if (!opt)
               return (0);
       if (cp) {
               *qfnamep = cp;
               return (1);
       }
       (void) sprintf(buf, "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
       *qfnamep = buf;
       return (1);
}