#ifdef QUOTAS /* Unix SMB/Netbios implementation. Version 1.9. support for quotas Copyright (C) Andrew Tridgell 1992-1998 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * This is one of the most system dependent parts of Samba, and its * done a litle differently. Each system has its own way of doing * things :-( */ #include "includes.h" extern int DEBUGLEVEL; #ifdef LINUX #include <sys/types.h> #include <asm/types.h> #include <sys/quota.h> #include <mntent.h> #include <linux/unistd.h> _syscall4(int, quotactl, int, cmd, const char *, special, int, id, caddr_t, addr); /**************************************************************************** try to get the disk space from disk quotas (LINUX version) ****************************************************************************/ BOOL disk_quotas(char *path, int *bsize, int *dfree, int *dsize) { uid_t euser_id; int r; struct dqblk D; struct stat S; FILE *fp; struct mntent *mnt; int devno; int found; /* find the block device file */ if ( stat(path, &S) == -1 ) { return(False) ; } devno = S.st_dev ; fp = setmntent(MOUNTED,"r"); found = False ; while ((mnt = getmntent(fp))) { if ( stat(mnt->mnt_dir,&S) == -1 ) continue ; if (S.st_dev == devno) { found = True ; break ; } } endmntent(fp) ; if (!found) { return(False); } euser_id=geteuid(); seteuid(0); r=quotactl(QCMD(Q_GETQUOTA,USRQUOTA), mnt->mnt_fsname, euser_id, (caddr_t)&D); seteuid(euser_id); /* Use softlimit to determine disk space, except when it has been exceeded */ *bsize = 1024; if (r) { if (errno == EDQUOT) { *dfree =0; *dsize =D.dqb_curblocks; return (True); } else return(False); } /* Use softlimit to determine disk space, except when it has been exceeded */ if ( (D.dqb_bsoftlimit && D.dqb_curblocks>=D.dqb_bsoftlimit) || (D.dqb_bhardlimit && D.dqb_curblocks>=D.dqb_bhardlimit) || (D.dqb_isoftlimit && D.dqb_curinodes>=D.dqb_isoftlimit) || (D.dqb_ihardlimit && D.dqb_curinodes>=D.dqb_ihardlimit) ) { *dfree = 0; *dsize = D.dqb_curblocks; } else if (D.dqb_bsoftlimit==0 && D.dqb_bhardlimit==0) { return(False); } else { if (D.dqb_bsoftlimit == 0) D.dqb_bsoftlimit = D.dqb_bhardlimit; *dfree = D.dqb_bsoftlimit - D.dqb_curblocks; *dsize = D.dqb_bsoftlimit; } return (True); } #elif defined(CRAY) #include <sys/quota.h> #include <mntent.h> /**************************************************************************** try to get the disk space from disk quotas (CRAY VERSION) ****************************************************************************/ BOOL disk_quotas(char *path, int *bsize, int *dfree, int *dsize) { struct mntent *mnt; FILE *fd; struct stat sbuf; dev_t devno ; static dev_t devno_cached = 0 ; static pstring name; struct q_request request ; struct qf_header header ; static int quota_default = 0 ; int found ; if ( stat(path,&sbuf) == -1 ) return(False) ; devno = sbuf.st_dev ; if ( devno != devno_cached ) { devno_cached = devno ; if ((fd = setmntent(KMTAB)) == NULL) return(False) ; found = False ; while ((mnt = getmntent(fd)) != NULL) { if ( stat(mnt->mnt_dir,&sbuf) == -1 ) continue ; if (sbuf.st_dev == devno) { found = True ; break ; } } pstrcpy(name,mnt->mnt_dir) ; endmntent(fd) ; if ( ! found ) return(False) ; } request.qf_magic = QF_MAGIC ; request.qf_entry.id = geteuid() ; if (quotactl(name, Q_GETQUOTA, &request) == -1) return(False) ; if ( ! request.user ) return(False) ; if ( request.qf_entry.user_q.f_quota == QFV_DEFAULT ) { if ( ! quota_default ) { if ( quotactl(name, Q_GETHEADER, &header) == -1 ) return(False) ; else quota_default = header.user_h.def_fq ; } *dfree = quota_default ; }else if ( request.qf_entry.user_q.f_quota == QFV_PREVENT ) { *dfree = 0 ; }else{ *dfree = request.qf_entry.user_q.f_quota ; } *dsize = request.qf_entry.user_q.f_use ; if ( *dfree ) *dfree -= *dsize ; if ( *dfree < 0 ) *dfree = 0 ; *bsize = 4096 ; /* Cray blocksize */ return(True) ; } #elif defined(SUNOS5) || defined(SUNOS4) #include <fcntl.h> #if defined(SUNOS5) #include <sys/fs/ufs_quota.h> #include <sys/mnttab.h> #else /* defined(SUNOS4) */ #include <ufs/quota.h> #include <mntent.h> #endif /**************************************************************************** try to get the disk space from disk quotas (solaris 2 version) ****************************************************************************/ /* Quota code by Peter Urbanec (amiga@cse.unsw.edu.au) */ BOOL disk_quotas(char *path, int *bsize, int *dfree, int *dsize) { uid_t user_id, euser_id; int ret; struct dqblk D; #if defined(SUNOS5) struct quotctl command; int file; struct mnttab mnt; static pstring name; #else struct mntent *mnt; static pstring name; #endif FILE *fd; struct stat sbuf; dev_t devno ; static dev_t devno_cached = 0 ; int found ; if ( stat(path,&sbuf) == -1 ) return(False) ; devno = sbuf.st_dev ; DEBUG(5,("disk_quotas: looking for path \"%s\" devno=%o\n", path,devno)); if ( devno != devno_cached ) { devno_cached = devno ; #if defined(SUNOS5) if ((fd = fopen(MNTTAB, "r")) == NULL) return(False) ; found = False ; while (getmntent(fd, &mnt) == 0) { if ( stat(mnt.mnt_mountp,&sbuf) == -1 ) continue ; DEBUG(5,("disk_quotas: testing \"%s\" devno=%o\n", mnt.mnt_mountp,sbuf.st_dev)); if (sbuf.st_dev == devno) { found = True ; break ; } } pstrcpy(name,mnt.mnt_mountp) ; pstrcat(name,"/quotas") ; fclose(fd) ; #else if ((fd = setmntent(MOUNTED, "r")) == NULL) return(False) ; found = False ; while ((mnt = getmntent(fd)) != NULL) { if ( stat(mnt->mnt_dir,&sbuf) == -1 ) continue ; DEBUG(5,("disk_quotas: testing \"%s\" devno=%o\n", mnt->mnt_dir,sbuf.st_dev)); if (sbuf.st_dev == devno) { found = True ; break ; } } pstrcpy(name,mnt->mnt_fsname) ; endmntent(fd) ; #endif if ( ! found ) return(False) ; } euser_id = geteuid(); user_id = getuid(); setuid(0); /* Solaris seems to want to give info only to super-user */ seteuid(0); #if defined(SUNOS5) DEBUG(5,("disk_quotas: looking for quotas file \"%s\"\n", name)); if((file=open(name, O_RDONLY))<0) { setuid(user_id); /* Restore the original UID status */ seteuid(euser_id); return(False); } command.op = Q_GETQUOTA; command.uid = euser_id; command.addr = (caddr_t) &D; ret = ioctl(file, Q_QUOTACTL, &command); close(file); #else DEBUG(5,("disk_quotas: trying quotactl on device \"%s\"\n", name)); ret = quotactl(Q_GETQUOTA, name, euser_id, &D); #endif setuid(user_id); /* Restore the original uid status. */ seteuid(euser_id); if (ret < 0) { DEBUG(2,("disk_quotas ioctl (Solaris) failed\n")); return(False); } /* Use softlimit to determine disk space. A user exceeding the quota is told * that there's no space left. Writes might actually work for a bit if the * hardlimit is set higher than softlimit. Effectively the disk becomes * made of rubber latex and begins to expand to accommodate the user :-) */ if (D.dqb_bsoftlimit==0) return(False); *bsize = 512; *dfree = D.dqb_bsoftlimit - D.dqb_curblocks; *dsize = D.dqb_bsoftlimit; if(*dfree < 0) { *dfree = 0; *dsize = D.dqb_curblocks; } DEBUG(5,("disk_quotas for path \"%s\" returning bsize %d, dfree %d, dsize %d\n", path,*bsize,*dfree,*dsize)); return(True); } #elif defined(OSF1) #include <ufs/quota.h> /**************************************************************************** try to get the disk space from disk quotas - OFS1 version ****************************************************************************/ BOOL disk_quotas(char *path, int *bsize, int *dfree, int *dsize) { uid_t user_id, euser_id; int r, save_errno; struct dqblk D; struct stat S; euser_id = geteuid(); user_id = getuid(); setreuid(euser_id, -1); r= quotactl(path,QCMD(Q_GETQUOTA, USRQUOTA),euser_id,(char *) &D); if (r) save_errno = errno; if (setreuid(user_id, -1) == -1) DEBUG(5,("Unable to reset uid to %d\n", user_id)); *bsize = DEV_BSIZE; if (r) { if (save_errno == EDQUOT) // disk quota exceeded { *dfree = 0; *dsize = D.dqb_curblocks; return (True); } else return (False); } /* Use softlimit to determine disk space, except when it has been exceeded */ if (D.dqb_bsoftlimit==0) return(False); if ((D.dqb_curblocks>D.dqb_bsoftlimit)) { *dfree = 0; *dsize = D.dqb_curblocks; } else { *dfree = D.dqb_bsoftlimit - D.dqb_curblocks; *dsize = D.dqb_bsoftlimit; } return (True); } #elif defined (SGI6) /**************************************************************************** try to get the disk space from disk quotas (IRIX 6.2 version) ****************************************************************************/ #include <sys/quota.h> #include <mntent.h> BOOL disk_quotas(char *path, int *bsize, int *dfree, int *dsize) { uid_t euser_id; int r; struct dqblk D; struct fs_disk_quota F; struct stat S; FILE *fp; struct mntent *mnt; int devno; int found; /* find the block device file */ if ( stat(path, &S) == -1 ) { return(False) ; } devno = S.st_dev ; fp = setmntent(MOUNTED,"r"); found = False ; while ((mnt = getmntent(fp))) { if ( stat(mnt->mnt_dir,&S) == -1 ) continue ; if (S.st_dev == devno) { found = True ; break ; } } endmntent(fp) ; if (!found) { return(False); } euser_id=geteuid(); seteuid(0); /* Use softlimit to determine disk space, except when it has been exceeded */ *bsize = 512; if ( 0 == strcmp ( mnt->mnt_type, "efs" )) { r=quotactl (Q_GETQUOTA, mnt->mnt_fsname, euser_id, (caddr_t) &D); seteuid(euser_id); /* Restore the original uid status. */ if (r==-1) return(False); /* Use softlimit to determine disk space, except when it has been exceeded */ if ( (D.dqb_bsoftlimit && D.dqb_curblocks>=D.dqb_bsoftlimit) || (D.dqb_bhardlimit && D.dqb_curblocks>=D.dqb_bhardlimit) || (D.dqb_fsoftlimit && D.dqb_curfiles>=D.dqb_fsoftlimit) || (D.dqb_fhardlimit && D.dqb_curfiles>=D.dqb_fhardlimit) ) { *dfree = 0; *dsize = D.dqb_curblocks; } else if (D.dqb_bsoftlimit==0 && D.dqb_bhardlimit==0) { return(False); } else { *dfree = D.dqb_bsoftlimit - D.dqb_curblocks; *dsize = D.dqb_bsoftlimit; } } else if ( 0 == strcmp ( mnt->mnt_type, "xfs" )) { r=quotactl (Q_XGETQUOTA, mnt->mnt_fsname, euser_id, (caddr_t) &F); seteuid(euser_id); /* Restore the original uid status. */ if (r==-1) return(False); /* Use softlimit to determine disk space, except when it has been exceeded */ if ( (F.d_blk_softlimit && F.d_bcount>=F.d_blk_softlimit) || (F.d_blk_hardlimit && F.d_bcount>=F.d_blk_hardlimit) || (F.d_ino_softlimit && F.d_icount>=F.d_ino_softlimit) || (F.d_ino_hardlimit && F.d_icount>=F.d_ino_hardlimit) ) { /* * Fixme!: these are __uint64_t, this may truncate values */ *dfree = 0; *dsize = (int) F.d_bcount; } else if (F.d_blk_softlimit==0 && F.d_blk_hardlimit==0) { return(False); } else { *dfree = (int)(F.d_blk_softlimit - F.d_bcount); *dsize = (int)F.d_blk_softlimit; } } else { seteuid(euser_id); /* Restore the original uid status. */ return(False); } return (True); } #else #if defined(__FreeBSD__) || defined(__OpenBSD__) #include <ufs/ufs/quota.h> #include <machine/param.h> #elif AIX /* AIX quota patch from Ole Holm Nielsen <ohnielse@fysik.dtu.dk> */ #include <jfs/quota.h> /* AIX 4.X: Rename members of the dqblk structure (ohnielse@fysik.dtu.dk) */ #define dqb_curfiles dqb_curinodes #define dqb_fhardlimit dqb_ihardlimit #define dqb_fsoftlimit dqb_isoftlimit #else /* !__FreeBSD__ && !AIX && !__OpenBSD__ */ #include <sys/quota.h> #include <devnm.h> #endif /**************************************************************************** try to get the disk space from disk quotas - default version ****************************************************************************/ BOOL disk_quotas(char *path, int *bsize, int *dfree, int *dsize) { uid_t euser_id; int r; struct dqblk D; #if !defined(__FreeBSD__) && !defined(AIX) && !defined(__OpenBSD__) char dev_disk[256]; struct stat S; /* find the block device file */ if ((stat(path, &S)<0) || (devnm(S_IFBLK, S.st_dev, dev_disk, 256, 0)<0)) return (False); #endif euser_id = geteuid(); #ifdef USE_SETRES { uid_t user_id; /* for HPUX, real uid must be same as euid to execute quotactl for euid */ user_id = getuid(); setresuid(euser_id,-1,-1); r=quotactl(Q_GETQUOTA, dev_disk, euser_id, &D); if (setresuid(user_id,-1,-1)) DEBUG(5,("Unable to reset uid to %d\n", user_id)); } #else /* USE_SETRES */ #if defined(__FreeBSD__) || defined(__OpenBSD__) { /* FreeBSD patches from Marty Moll <martym@arbor.edu> */ uid_t user_id; gid_t egrp_id; /* Need to be root to get quotas in FreeBSD */ user_id = getuid(); egrp_id = getegid(); setuid(0); seteuid(0); r= quotactl(path,QCMD(Q_GETQUOTA,USRQUOTA),euser_id,(char *) &D); /* As FreeBSD has group quotas, if getting the user quota fails, try getting the group instead. */ if (r) r= quotactl(path,QCMD(Q_GETQUOTA,GRPQUOTA),egrp_id,(char *) &D); setuid(user_id); seteuid(euser_id); } #elif defined(AIX) /* AIX has both USER and GROUP quotas: Get the USER quota (ohnielse@fysik.dtu.dk) */ r= quotactl(path,QCMD(Q_GETQUOTA,USRQUOTA),euser_id,(char *) &D); #else /* !__FreeBSD__ && !AIX && !__OpenBSD__ */ r=quotactl(Q_GETQUOTA, dev_disk, euser_id, &D); #endif /* !__FreeBSD__ && !AIX && !__OpenBSD__ */ #endif /* USE_SETRES */ /* Use softlimit to determine disk space, except when it has been exceeded */ #if defined(__FreeBSD__) || defined(__OpenBSD__) *bsize = DEV_BSIZE; #else /* !__FreeBSD__ && !__OpenBSD__ */ *bsize = 1024; #endif /*!__FreeBSD__ && !__OpenBSD__ */ if (r) { if (errno == EDQUOT) { *dfree =0; *dsize =D.dqb_curblocks; return (True); } else return(False); } if (D.dqb_bsoftlimit==0) return(False); /* Use softlimit to determine disk space, except when it has been exceeded */ if ((D.dqb_curblocks>D.dqb_bsoftlimit) #if !defined(__FreeBSD__) && !defined(__OpenBSD__) ||((D.dqb_curfiles>D.dqb_fsoftlimit) && (D.dqb_fsoftlimit != 0)) #endif ) { *dfree = 0; *dsize = D.dqb_curblocks; } else { *dfree = D.dqb_bsoftlimit - D.dqb_curblocks; *dsize = D.dqb_bsoftlimit; } return (True); } #endif #else /* this keeps fussy compilers happy */ void quotas_dummy(void) {} #endif /* QUOTAS */