OpenBSD-4.6/usr.sbin/edquota/edquota.c
/*
* 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. 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
static char copyright[] =
"@(#) Copyright (c) 1980, 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)edquota.c 8.1 (Berkeley) 6/6/93";*/
static char *rcsid = "$Id: edquota.c,v 1.48 2007/10/17 20:02:33 deraadt Exp $";
#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>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
char *qfname = QUOTAFILENAME;
char *qfextension[] = INITQFNAMES;
char *quotagroup = QUOTAGROUP;
char tmpfil[] = _PATH_TMPFILE;
struct quotause {
struct quotause *next;
long flags;
struct dqblk dqblk;
char fsname[MAXPATHLEN];
char qfname[1]; /* actually longer */
} *getprivs(u_int, int);
#define FOUND 0x01
void usage(void);
int getentry(char *, int, u_int *);
struct quotause *
getprivs(u_int, int);
void putprivs(long, int, struct quotause *);
int editit(const char *);
int writeprivs(struct quotause *, int, char *, int);
int readprivs(struct quotause *, int);
int writetimes(struct quotause *, int, int);
int readtimes(struct quotause *, int);
char * cvtstoa(time_t);
int cvtatos(time_t, char *, time_t *);
void freeprivs(struct quotause *);
int alldigits(char *s);
int hasquota(struct fstab *, int, char **);
void
usage(void)
{
(void)fprintf(stderr, "%s%s%s%s",
"usage: edquota [-u] [-p proto-username] username | uid ...\n",
" edquota -g [-p proto-groupname] groupname | gid ...\n",
" edquota -t [-u]\n",
" edquota -g -t\n");
exit(1);
}
int
main(int argc, char *argv[])
{
struct quotause *qup, *protoprivs, *curprivs;
u_int id, protoid;
int quotatype, tmpfd;
char *protoname = NULL;
int ch;
int tflag = 0, pflag = 0;
if (argc < 2)
usage();
if (getuid())
errx(1, "%s", strerror(EPERM));
quotatype = USRQUOTA;
while ((ch = getopt(argc, argv, "ugtp:")) != -1) {
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 (getentry(protoname, quotatype, &protoid) == -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 (getentry(*argv++, quotatype, &id) == -1)
continue;
putprivs(id, quotatype, protoprivs);
}
exit(0);
}
if ((tmpfd = mkstemp(tmpfil)) == -1)
errx(1, "%s", tmpfil);
if (tflag) {
protoprivs = getprivs(0, quotatype);
if (writetimes(protoprivs, tmpfd, quotatype) == 0) {
unlink(tmpfil);
exit(1);
}
if (editit(tmpfil) == -1) {
unlink(tmpfil);
err(1, "error starting editor");
}
if (readtimes(protoprivs, tmpfd))
putprivs(0, quotatype, protoprivs);
freeprivs(protoprivs);
unlink(tmpfil);
exit(0);
}
for ( ; argc > 0; argc--, argv++) {
if (getentry(*argv, quotatype, &id) == -1)
continue;
curprivs = getprivs(id, quotatype);
if (writeprivs(curprivs, tmpfd, *argv, quotatype) == 0)
continue;
if (editit(tmpfil) == -1) {
warn("error starting editor");
continue;
}
if (readprivs(curprivs, tmpfd))
putprivs(id, quotatype, curprivs);
freeprivs(curprivs);
}
close(tmpfd);
unlink(tmpfil);
exit(0);
}
/*
* 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.
*/
int
getentry(char *name, int quotatype, u_int *idp)
{
struct passwd *pw;
struct group *gr;
u_int id;
switch(quotatype) {
case USRQUOTA:
if ((pw = getpwnam(name))) {
*idp = pw->pw_uid;
return 0;
} else if (alldigits(name)) {
if ((id = strtoul(name, NULL, 10)) <= UID_MAX) {
*idp = id;
return 0;
}
}
warnx("%s: no such user", name);
break;
case GRPQUOTA:
if ((gr = getgrnam(name))) {
*idp = gr->gr_gid;
return 0;
} else if (alldigits(name)) {
if ((id = strtoul(name, NULL, 10)) <= GID_MAX) {
*idp = id;
return (0);
}
}
warnx("%s: no such group", name);
break;
default:
warnx("%d: unknown quota type", quotatype);
break;
}
sleep(1);
return(-1);
}
/*
* Collect the requested quota information.
*/
struct quotause *
getprivs(u_int id, int quotatype)
{
struct fstab *fs;
struct quotause *qup, *quptail;
struct quotause *quphead;
int qcmd, qupsize, fd;
u_int mid;
char *qfpathname;
static int warned = 0;
size_t qfpathnamelen;
setfsent();
quphead = (struct quotause *)0;
qcmd = QCMD(Q_GETQUOTA, quotatype);
while ((fs = getfsent())) {
if (strcmp(fs->fs_vfstype, "ffs") &&
strcmp(fs->fs_vfstype, "ufs") &&
strcmp(fs->fs_vfstype, "mfs"))
continue;
if (!hasquota(fs, quotatype, &qfpathname))
continue;
qfpathnamelen = strlen(qfpathname);
qupsize = sizeof(*qup) + qfpathnamelen;
if ((qup = (struct quotause *)malloc(qupsize)) == NULL)
errx(2, "out of memory");
if (quotactl(fs->fs_file, qcmd, id, (char *)&qup->dqblk) != 0) {
if (errno == EOPNOTSUPP && !warned) {
warned++;
(void)fprintf(stderr, "Warning: %s\n",
"Quotas are not compiled into this kernel");
sleep(3);
}
if (getentry(quotagroup, GRPQUOTA, &mid) == -1) {
warned++;
(void)fprintf(stderr, "Warning: "
"group %s not known, skipping %s\n",
quotagroup, fs->fs_file);
}
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;
}
(void)fprintf(stderr, "Creating quota file %s\n",
qfpathname);
sleep(3);
(void)fchown(fd, getuid(), mid);
(void)fchmod(fd, 0640);
}
lseek(fd, (off_t)(id * sizeof(struct dqblk)), SEEK_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 */
warn("read error in %s", qfpathname);
close(fd);
free(qup);
continue;
}
close(fd);
}
strlcpy(qup->qfname, qfpathname, qfpathnamelen + 1);
strlcpy(qup->fsname, fs->fs_file, sizeof qup->fsname);
if (quphead == NULL)
quphead = qup;
else
quptail->next = qup;
quptail = qup;
qup->next = 0;
}
endfsent();
return(quphead);
}
/*
* Store the requested quota information.
*/
void
putprivs(long id, int quotatype, struct quotause *quplist)
{
struct quotause *qup;
int qcmd, fd;
qcmd = QCMD(Q_SETQUOTA, quotatype);
for (qup = quplist; qup; qup = qup->next) {
if (quotactl(qup->fsname, qcmd, id, (char *)&qup->dqblk) == 0)
continue;
if ((fd = open(qup->qfname, O_WRONLY)) < 0) {
perror(qup->qfname);
} else {
lseek(fd, (off_t)(id * sizeof (struct dqblk)), SEEK_SET);
if (write(fd, &qup->dqblk, sizeof (struct dqblk)) !=
sizeof (struct dqblk))
warn("%s", qup->qfname);
close(fd);
}
}
}
/*
* Execute an editor on the specified pathname, which is interpreted
* from the shell. This means flags may be included.
*
* Returns -1 on error, or the exit value on success.
*/
int
editit(const char *pathname)
{
char *argp[] = {"sh", "-c", NULL, NULL}, *ed, *p;
sig_t sighup, sigint, sigquit, sigchld;
pid_t pid;
int saved_errno, st, ret = -1;
ed = getenv("VISUAL");
if (ed == NULL || ed[0] == '\0')
ed = getenv("EDITOR");
if (ed == NULL || ed[0] == '\0')
ed = _PATH_VI;
if (asprintf(&p, "%s %s", ed, pathname) == -1)
return (-1);
argp[2] = p;
sighup = signal(SIGHUP, SIG_IGN);
sigint = signal(SIGINT, SIG_IGN);
sigquit = signal(SIGQUIT, SIG_IGN);
sigchld = signal(SIGCHLD, SIG_DFL);
if ((pid = fork()) == -1)
goto fail;
if (pid == 0) {
execv(_PATH_BSHELL, argp);
_exit(127);
}
while (waitpid(pid, &st, 0) == -1)
if (errno != EINTR)
goto fail;
if (!WIFEXITED(st))
errno = EINTR;
else
ret = WEXITSTATUS(st);
fail:
saved_errno = errno;
(void)signal(SIGHUP, sighup);
(void)signal(SIGINT, sigint);
(void)signal(SIGQUIT, sigquit);
(void)signal(SIGCHLD, sigchld);
free(p);
errno = saved_errno;
return (ret);
}
/*
* Convert a quotause list to an ASCII file.
*/
int
writeprivs(struct quotause *quplist, int outfd, char *name, int quotatype)
{
struct quotause *qup;
FILE *fp;
ftruncate(outfd, 0);
lseek(outfd, 0, SEEK_SET);
if ((fp = fdopen(dup(outfd), "w")) == NULL)
err(1, "%s", tmpfil);
(void)fprintf(fp, "Quotas for %s %s:\n", qfextension[quotatype], name);
for (qup = quplist; qup; qup = qup->next) {
(void)fprintf(fp, "%s: %s %d, limits (soft = %d, hard = %d)\n",
qup->fsname, "KBytes in use:",
(int)(dbtob((u_quad_t)qup->dqblk.dqb_curblocks) / 1024),
(int)(dbtob((u_quad_t)qup->dqblk.dqb_bsoftlimit) / 1024),
(int)(dbtob((u_quad_t)qup->dqblk.dqb_bhardlimit) / 1024));
(void)fprintf(fp, "%s %d, limits (soft = %d, hard = %d)\n",
"\tinodes in use:", qup->dqblk.dqb_curinodes,
qup->dqblk.dqb_isoftlimit, qup->dqblk.dqb_ihardlimit);
}
fclose(fp);
return(1);
}
/*
* Merge changes to an ASCII file into a quotause list.
*/
int
readprivs(struct quotause *quplist, int infd)
{
struct quotause *qup;
FILE *fp;
int cnt;
char *cp;
struct dqblk dqblk;
char *fsp, line1[BUFSIZ], line2[BUFSIZ];
lseek(infd, 0, SEEK_SET);
fp = fdopen(dup(infd), "r");
if (fp == NULL) {
warnx("can't re-read temp file!!");
return(0);
}
/*
* Discard title line, then read pairs of lines to process.
*/
(void)fgets(line1, sizeof (line1), fp);
while (fgets(line1, sizeof (line1), fp) != NULL &&
fgets(line2, sizeof (line2), fp) != NULL) {
if ((fsp = strtok(line1, " \t:")) == NULL) {
warnx("%s: bad format", line1);
return(0);
}
if ((cp = strtok((char *)0, "\n")) == NULL) {
warnx("%s: %s: bad format", fsp, &fsp[strlen(fsp) + 1]);
return(0);
}
cnt = sscanf(cp,
" KBytes in use: %d, limits (soft = %d, hard = %d)",
&dqblk.dqb_curblocks, &dqblk.dqb_bsoftlimit,
&dqblk.dqb_bhardlimit);
if (cnt != 3) {
warnx("%s:%s: bad format", fsp, cp);
return(0);
}
dqblk.dqb_curblocks = btodb((u_quad_t)
dqblk.dqb_curblocks * 1024);
dqblk.dqb_bsoftlimit = btodb((u_quad_t)
dqblk.dqb_bsoftlimit * 1024);
dqblk.dqb_bhardlimit = btodb((u_quad_t)
dqblk.dqb_bhardlimit * 1024);
if ((cp = strtok(line2, "\n")) == NULL) {
warnx("%s: %s: bad format", 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) {
warnx("%s: %s: bad format", 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;
warnx("%s: cannot change current allocation", fsp);
break;
}
}
fclose(fp);
/*
* 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.
*/
int
writetimes(struct quotause *quplist, int outfd, int quotatype)
{
struct quotause *qup;
FILE *fp;
ftruncate(outfd, 0);
lseek(outfd, 0, SEEK_SET);
if ((fp = fdopen(dup(outfd), "w")) == NULL)
err(1, "%s", tmpfil);
(void)fprintf(fp,
"Time units may be: days, hours, minutes, or seconds\n");
(void)fprintf(fp,
"Grace period before enforcing soft limits for %ss:\n",
qfextension[quotatype]);
for (qup = quplist; qup; qup = qup->next) {
(void)fprintf(fp, "%s: block grace period: %s, ",
qup->fsname, cvtstoa(qup->dqblk.dqb_btime));
(void)fprintf(fp, "file grace period: %s\n",
cvtstoa(qup->dqblk.dqb_itime));
}
fclose(fp);
return(1);
}
/*
* Merge changes of grace times in an ASCII file into a quotause list.
*/
int
readtimes(struct quotause *quplist, int infd)
{
struct quotause *qup;
FILE *fp;
int cnt;
char *cp;
time_t itime, btime, iseconds, bseconds;
char *fsp, bunits[10], iunits[10], line1[BUFSIZ];
lseek(infd, 0, SEEK_SET);
fp = fdopen(dup(infd), "r");
if (fp == NULL) {
warnx("can't re-read temp file!!");
return(0);
}
/*
* Discard two title lines, then read lines to process.
*/
(void)fgets(line1, sizeof (line1), fp);
(void)fgets(line1, sizeof (line1), fp);
while (fgets(line1, sizeof (line1), fp) != NULL) {
if ((fsp = strtok(line1, " \t:")) == NULL) {
warnx("%s: bad format", line1);
return(0);
}
if ((cp = strtok((char *)0, "\n")) == NULL) {
warnx("%s: %s: bad format", fsp,
&fsp[strlen(fsp) + 1]);
return(0);
}
cnt = sscanf(cp,
" block grace period: %d %9s file grace period: %d %9s",
(int *)&btime, bunits, (int *)&itime, iunits);
if (cnt != 4) {
warnx("%s:%s: bad format", 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(fp);
/*
* 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_t time)
{
static char buf[20];
if (time % (24 * 60 * 60) == 0) {
time /= 24 * 60 * 60;
(void)snprintf(buf, sizeof buf, "%d day%s", (int)time,
time == 1 ? "" : "s");
} else if (time % (60 * 60) == 0) {
time /= 60 * 60;
(void)snprintf(buf, sizeof buf, "%d hour%s", (int)time,
time == 1 ? "" : "s");
} else if (time % 60 == 0) {
time /= 60;
(void)snprintf(buf, sizeof buf, "%d minute%s", (int)time,
time == 1 ? "" : "s");
} else
(void)snprintf(buf, sizeof buf, "%d second%s", (int)time,
time == 1 ? "" : "s");
return(buf);
}
/*
* Convert ASCII input times to seconds.
*/
int
cvtatos(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 {
(void)printf("%s: bad units, specify %s\n", units,
"days, hours, minutes, or seconds");
return(0);
}
return(1);
}
/*
* Free a list of quotause structures.
*/
void
freeprivs(struct quotause *quplist)
{
struct quotause *qup, *nextqup;
for (qup = quplist; qup; qup = nextqup) {
nextqup = qup->next;
free(qup);
}
}
/*
* Check whether a string is completely composed of digits.
*/
int
alldigits(char *s)
{
int 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.
*/
int
hasquota(struct fstab *fs, int type, char **qfnamep)
{
char *opt;
char *cp;
static char initname, usrname[100], grpname[100];
static char buf[BUFSIZ];
if (!initname) {
(void)snprintf(usrname, sizeof usrname, "%s%s",
qfextension[USRQUOTA], qfname);
(void)snprintf(grpname, sizeof grpname, "%s%s",
qfextension[GRPQUOTA], qfname);
initname = 1;
}
strlcpy(buf, fs->fs_mntops, sizeof buf);
for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
if ((cp = strchr(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)snprintf(buf, sizeof buf, "%s/%s.%s",
fs->fs_file, qfname, qfextension[type]);
*qfnamep = buf;
return(1);
}