freebsd-dev/usr.sbin/edquota/edquota.c

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/*
* Copyright (c) 1980, 1990, 1993
* The 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
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
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#if 0
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static char sccsid[] = "@(#)edquota.c 8.1 (Berkeley) 6/6/93";
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#endif
static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
/*
* Disk quota editor.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/wait.h>
#include <ufs/ufs/quota.h>
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#include <ctype.h>
#include <err.h>
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#include <errno.h>
#include <fstab.h>
#include <grp.h>
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#include <pwd.h>
#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
#include <unistd.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 */
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};
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#define FOUND 0x01
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int alldigits __P((char *s));
int cvtatos __P((time_t, char *, time_t *));
char *cvtstoa __P((time_t));
int editit __P((char *));
void freeprivs __P((struct quotause *));
int getentry __P((char *, int));
struct quotause *getprivs __P((long, int));
int hasquota __P((struct fstab *, int, char **));
void putprivs __P((long, int, struct quotause *));
int readprivs __P((struct quotause *, char *));
int readtimes __P((struct quotause *, char *));
static void usage __P((void));
int writetimes __P((struct quotause *, int, int));
int writeprivs __P((struct quotause *, int, char *, int));
int
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main(argc, argv)
register char **argv;
int argc;
{
register struct quotause *qup, *protoprivs, *curprivs;
register long id, protoid;
register int quotatype, tmpfd;
register uid_t startuid, enduid;
char *protoname, *cp, ch;
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int tflag = 0, pflag = 0;
char buf[30];
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if (argc < 2)
usage();
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if (getuid())
errx(1, "permission denied");
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quotatype = USRQUOTA;
while ((ch = getopt(argc, argv, "ugtp:")) != -1) {
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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 (isdigit(*argv[0]) &&
(cp = strchr(*argv, '-')) != NULL) {
*cp++ = '\0';
startuid = atoi(*argv);
enduid = atoi(cp);
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if (enduid < startuid)
errx(1,
"ending uid (%d) must be >= starting uid (%d) when using uid ranges",
enduid, startuid);
for ( ; startuid <= enduid; startuid++) {
snprintf(buf, sizeof(buf), "%d",
startuid);
if ((id = getentry(buf, quotatype)) < 0)
continue;
putprivs(id, quotatype, protoprivs);
}
continue;
}
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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, tmpfil))
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putprivs(0, quotatype, protoprivs);
freeprivs(protoprivs);
close(tmpfd);
unlink(tmpfil);
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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, tmpfil))
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putprivs(id, quotatype, curprivs);
freeprivs(curprivs);
}
close(tmpfd);
unlink(tmpfil);
exit(0);
}
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static void
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usage()
{
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fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: edquota [-u] [-p username] username ...",
" edquota -g [-p groupname] groupname ...",
" edquota [-u] -t",
" edquota -g -t");
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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.
*/
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int
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getentry(name, quotatype)
char *name;
int quotatype;
{
struct passwd *pw;
struct group *gr;
if (alldigits(name))
return (atoi(name));
switch(quotatype) {
case USRQUOTA:
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if ((pw = getpwnam(name)))
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return (pw->pw_uid);
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warnx("%s: no such user", name);
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break;
case GRPQUOTA:
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if ((gr = getgrnam(name)))
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return (gr->gr_gid);
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warnx("%s: no such group", name);
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break;
default:
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warnx("%d: unknown quota type", quotatype);
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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;
setfsent();
quphead = (struct quotause *)0;
qcmd = QCMD(Q_GETQUOTA, quotatype);
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while ((fs = getfsent())) {
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if (strcmp(fs->fs_vfstype, "ufs"))
continue;
if (!hasquota(fs, quotatype, &qfpathname))
continue;
qupsize = sizeof(*qup) + strlen(qfpathname);
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if ((qup = (struct quotause *)malloc(qupsize)) == NULL)
errx(2, "out of memory");
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if (quotactl(fs->fs_file, qcmd, id, &qup->dqblk) != 0) {
if (errno == EOPNOTSUPP && !warned) {
warned++;
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warnx("warning: quotas are not compiled into this kernel");
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sleep(3);
}
if ((fd = open(qfpathname, O_RDONLY)) < 0) {
fd = open(qfpathname, O_RDWR|O_CREAT, 0640);
if (fd < 0 && errno != ENOENT) {
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warn("%s", qfpathname);
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free(qup);
continue;
}
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warnx("creating quota file %s", qfpathname);
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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 */
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warn("read error in %s", qfpathname);
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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.
*/
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void
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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) {
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warn("%s", qup->qfname);
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} else {
lseek(fd, (long)id * (long)sizeof (struct dqblk), 0);
if (write(fd, &qup->dqblk, sizeof (struct dqblk)) !=
sizeof (struct dqblk)) {
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warn("%s", qup->qfname);
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}
close(fd);
}
}
}
/*
* Take a list of priviledges and get it edited.
*/
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int
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editit(tmpfile)
char *tmpfile;
{
long omask;
int pid, stat;
omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
top:
if ((pid = fork()) < 0) {
if (errno == EPROCLIM) {
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warnx("you have too many processes");
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return(0);
}
if (errno == EAGAIN) {
sleep(1);
goto top;
}
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warn("fork");
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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);
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err(1, "%s", ed);
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}
waitpid(pid, &stat, 0);
sigsetmask(omask);
if (!WIFEXITED(stat) || WEXITSTATUS(stat) != 0)
return (0);
return (1);
}
/*
* Convert a quotause list to an ASCII file.
*/
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int
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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);
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if ((fd = fdopen(dup(outfd), "w")) == NULL)
err(1, "%s", tmpfil);
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fprintf(fd, "Quotas for %s %s:\n", qfextension[quotatype], name);
for (qup = quplist; qup; qup = qup->next) {
fprintf(fd, "%s: %s %lu, limits (soft = %lu, hard = %lu)\n",
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qup->fsname, "blocks in use:",
(unsigned long)(dbtob(qup->dqblk.dqb_curblocks) / 1024),
(unsigned long)(dbtob(qup->dqblk.dqb_bsoftlimit) / 1024),
(unsigned long)(dbtob(qup->dqblk.dqb_bhardlimit) / 1024));
fprintf(fd, "%s %lu, limits (soft = %lu, hard = %lu)\n",
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"\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.
*/
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int
readprivs(quplist, inname)
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struct quotause *quplist;
char *inname;
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{
register struct quotause *qup;
FILE *fd;
int cnt;
register char *cp;
struct dqblk dqblk;
char *fsp, line1[BUFSIZ], line2[BUFSIZ];
fd = fopen(inname, "r");
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if (fd == NULL) {
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warnx("can't re-read temp file!!");
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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) {
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warnx("%s: bad format", line1);
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return (0);
}
if ((cp = strtok((char *)0, "\n")) == NULL) {
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warnx("%s: %s: bad format", fsp, &fsp[strlen(fsp) + 1]);
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return (0);
}
cnt = sscanf(cp,
" blocks in use: %lu, limits (soft = %lu, hard = %lu)",
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&dqblk.dqb_curblocks, &dqblk.dqb_bsoftlimit,
&dqblk.dqb_bhardlimit);
if (cnt != 3) {
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warnx("%s:%s: bad format", fsp, cp);
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return (0);
}
dqblk.dqb_curblocks = btodb((off_t)dqblk.dqb_curblocks * 1024);
dqblk.dqb_bsoftlimit = btodb((off_t)dqblk.dqb_bsoftlimit
* 1024);
dqblk.dqb_bhardlimit = btodb((off_t)dqblk.dqb_bhardlimit
* 1024);
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if ((cp = strtok(line2, "\n")) == NULL) {
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warnx("%s: %s: bad format", fsp, line2);
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return (0);
}
cnt = sscanf(cp,
"\tinodes in use: %lu, limits (soft = %lu, hard = %lu)",
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&dqblk.dqb_curinodes, &dqblk.dqb_isoftlimit,
&dqblk.dqb_ihardlimit);
if (cnt != 3) {
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warnx("%s: %s: bad format", fsp, line2);
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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;
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warnx("%s: cannot change current allocation", fsp);
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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.
*/
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int
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writetimes(quplist, outfd, quotatype)
struct quotause *quplist;
int outfd;
int quotatype;
{
register struct quotause *qup;
FILE *fd;
ftruncate(outfd, 0);
lseek(outfd, 0, L_SET);
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if ((fd = fdopen(dup(outfd), "w")) == NULL)
err(1, "%s", tmpfil);
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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.
*/
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int
readtimes(quplist, inname)
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struct quotause *quplist;
char *inname;
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{
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];
fd = fopen(inname, "r");
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if (fd == NULL) {
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warnx("can't re-read temp file!!");
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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) {
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warnx("%s: bad format", line1);
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return (0);
}
if ((cp = strtok((char *)0, "\n")) == NULL) {
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warnx("%s: %s: bad format", fsp, &fsp[strlen(fsp) + 1]);
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return (0);
}
cnt = sscanf(cp,
" block grace period: %ld %s file grace period: %ld %s",
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&btime, bunits, &itime, iunits);
if (cnt != 4) {
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warnx("%s:%s: bad format", fsp, cp);
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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, "%ld day%s", time, time == 1 ? "" : "s");
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} else if (time % (60 * 60) == 0) {
time /= 60 * 60;
sprintf(buf, "%ld hour%s", time, time == 1 ? "" : "s");
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} else if (time % 60 == 0) {
time /= 60;
sprintf(buf, "%ld minute%s", time, time == 1 ? "" : "s");
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} else
sprintf(buf, "%ld second%s", time, time == 1 ? "" : "s");
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return (buf);
}
/*
* Convert ASCII input times to seconds.
*/
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int
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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.
*/
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void
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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.
*/
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int
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alldigits(s)
register char *s;
{
register c;
c = *s++;
do {
if (!isdigit(c))
return (0);
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} while ((c = *s++));
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return (1);
}
/*
* Check to see if a particular quota is to be enabled.
*/
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int
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hasquota(fs, type, qfnamep)
register struct fstab *fs;
int type;
char **qfnamep;
{
register char *opt;
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char *cp;
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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, ",")) {
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if ((cp = index(opt, '=')))
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*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);
}