| /* |
| * rmnt.c -- readmnt() function for lsof library |
| */ |
| |
| |
| /* |
| * Copyright 1997 Purdue Research Foundation, West Lafayette, Indiana |
| * 47907. All rights reserved. |
| * |
| * Written by Victor A. Abell |
| * |
| * This software is not subject to any license of the American Telephone |
| * and Telegraph Company or the Regents of the University of California. |
| * |
| * Permission is granted to anyone to use this software for any purpose on |
| * any computer system, and to alter it and redistribute it freely, subject |
| * to the following restrictions: |
| * |
| * 1. Neither the authors nor Purdue University are responsible for any |
| * consequences of the use of this software. |
| * |
| * 2. The origin of this software must not be misrepresented, either by |
| * explicit claim or by omission. Credit to the authors and Purdue |
| * University must appear in documentation and sources. |
| * |
| * 3. Altered versions must be plainly marked as such, and must not be |
| * misrepresented as being the original software. |
| * |
| * 4. This notice may not be removed or altered. |
| */ |
| |
| |
| #include "../machine.h" |
| |
| #if defined(USE_LIB_READMNT) |
| |
| # if !defined(lint) |
| static char copyright[] = |
| "@(#) Copyright 1997 Purdue Research Foundation.\nAll rights reserved.\n"; |
| static char *rcsid = "$Id: rmnt.c,v 1.12 2008/10/21 16:13:23 abe Exp $"; |
| # endif /* !defined(lint) */ |
| |
| #include "../lsof.h" |
| |
| |
| |
| /* |
| * The caller may define: |
| * |
| * 1. An RMNT_EXPDEV macro to expand (ala EP/IX) device numbers; |
| * |
| * EP/IX, for example, uses: |
| * |
| * #define RMNT_EXPDEV(n) expdev(n) |
| * |
| * 2. A custom macro, MNTSKIP, for making decisions to skip entries |
| * -- e.g., ones whose mnt_type is MNTTYPE_IGNORE. |
| * |
| * 3. RMNT_FSTYPE to specify the member name of the character string of the |
| * mntent structure containing the file system type, and MOUNTS_FSTYPE to |
| * specify the member name of the character string pointer of the local |
| * mounts structure where RMNT_FSTYPE is to be copied. |
| * |
| * 4. RMNT_STAT_FSTYPE to specify the member name of the stat structure |
| * containing an integer file system type, and MOUNTS_STAT_FSTYPE to |
| * specify the member name of the integer in the local mounts structure |
| * where RMNT_STAT_FSTYPE is to be copied. |
| * |
| */ |
| |
| #if !defined(RMNT_EXPDEV) |
| #define RMNT_EXPDEV(n) n |
| #endif /* !defined(RMNT_EXPDEV) */ |
| |
| |
| /* |
| * Local static definitions |
| */ |
| |
| static struct mounts *Lmi = (struct mounts *)NULL; /* local mount info */ |
| static int Lmist = 0; /* Lmi status */ |
| |
| |
| /* |
| * readmnt() - read mount table |
| */ |
| |
| struct mounts * |
| readmnt() |
| { |
| char *dn = (char *)NULL; |
| char *ln; |
| FILE *mfp; |
| struct mntent *mp; |
| struct mounts *mtp; |
| char *opt, *opte; |
| struct stat sb; |
| |
| if (Lmi || Lmist) |
| return(Lmi); |
| /* |
| * Open access to the mount table. |
| */ |
| if (!(mfp = setmntent(MOUNTED, "r"))) { |
| (void) fprintf(stderr, "%s: can't access %s\n", Pn, MOUNTED); |
| Exit(1); |
| } |
| /* |
| * Read mount table entries. |
| */ |
| while ((mp = getmntent(mfp))) { |
| |
| #if defined(MNTSKIP) |
| /* |
| * Specfy in the MNTSKIP macro the decisions needed to determine |
| * that this entry should be skipped. |
| * |
| * Typically entries whose mnt_type is MNTTYPE_IGNORE are skipped. |
| * |
| * The MNTSKIP macro allows the caller to use other tests. |
| */ |
| MNTSKIP |
| #endif /* MNTSKIP */ |
| |
| /* |
| * Interpolate a possible symbolic directory link. |
| */ |
| if (dn) |
| (void) free((FREE_P *)dn); |
| if (!(dn = mkstrcpy(mp->mnt_dir, (MALLOC_S *)NULL))) |
| goto no_space_for_mount; |
| if (!(ln = Readlink(dn))) { |
| if (!Fwarn) |
| (void) fprintf(stderr, |
| " Output information may be incomplete.\n"); |
| continue; |
| } |
| if (ln != dn) { |
| (void) free((FREE_P *)dn); |
| dn = ln; |
| } |
| if (*dn != '/') |
| continue; |
| /* |
| * Stat() the directory. |
| */ |
| if (statsafely(dn, &sb)) { |
| if (!Fwarn) { |
| (void) fprintf(stderr, "%s: WARNING: can't stat() ", Pn); |
| safestrprt(mp->mnt_type, stderr, 0); |
| (void) fprintf(stderr, " file system "); |
| safestrprt(mp->mnt_dir, stderr, 1); |
| (void) fprintf(stderr, |
| " Output information may be incomplete.\n"); |
| } |
| if ((opt = strstr(mp->mnt_opts, "dev="))) { |
| (void) zeromem(&sb, sizeof(sb)); |
| if ((opte = x2dev(opt + 4, (dev_t *)&sb.st_dev))) { |
| sb.st_mode = S_IFDIR | 0777; |
| if (!Fwarn) |
| (void) fprintf(stderr, |
| " assuming \"%.*s\" from %s\n", |
| (int)(opte - opt), opt, MOUNTED); |
| } else |
| opt = (char *)NULL; |
| } |
| if (!opt) |
| continue; |
| } |
| /* |
| * Allocate and fill a local mounts structure with the directory |
| * (mounted) information. |
| */ |
| if (!(mtp = (struct mounts *)malloc(sizeof(struct mounts)))) { |
| |
| no_space_for_mount: |
| |
| (void) fprintf(stderr, "%s: no space for mount at ", Pn); |
| safestrprt(mp->mnt_fsname, stderr, 0); |
| (void) fprintf(stderr, " ("); |
| safestrprt(mp->mnt_dir, stderr, 0); |
| (void) fprintf(stderr, ")\n"); |
| Exit(1); |
| } |
| mtp->dir = dn; |
| dn = (char *)NULL; |
| mtp->next = Lmi; |
| mtp->dev = RMNT_EXPDEV(sb.st_dev); |
| mtp->rdev = RMNT_EXPDEV(sb.st_rdev); |
| mtp->inode = (INODETYPE)sb.st_ino; |
| mtp->mode = sb.st_mode; |
| |
| # if defined(RMNT_FSTYPE) && defined(MOUNTS_FSTYPE) |
| /* |
| * Make a copy of RMNT_FSTYPE in MOUNTS_FSTYPE. |
| */ |
| if (!(mtp->MOUNTS_FSTYPE = mkstrcpy(mp->RMNT_FSTYPE, |
| (MALLOC_S *)NULL))) |
| { |
| (void) fprintf(stderr, "%s: no space for fstype (%s): %s\n", |
| Pn, mtp->dir, mp->RMNT_FSTYPE); |
| Exit(1); |
| } |
| (void) strcpy(mtp->MOUNTS_FSTYPE, mp->RMNT_FSTYPE); |
| # endif /* defined(RMNT_FSTYP) && defined(MOUNTS_FSTYP) */ |
| |
| # if defined(RMNT_STAT_FSTYPE) && defined(MOUNTS_STAT_FSTYPE) |
| /* |
| * Make a copy of RMNT_STAT_FSTYPE in MOUNTS_STAT_FSTYPE. |
| */ |
| mtp->MOUNTS_STAT_FSTYPE = (int)sb.RMNT_STAT_FSTYPE; |
| # endif /* defined(RMNT_STAT_FSTYP) && defined(MOUNTS_STAT_FSTYP) */ |
| |
| /* |
| * Interpolate a possible file system (mounted-on device) name link. |
| */ |
| if (!(dn = mkstrcpy(mp->mnt_fsname, (MALLOC_S *)NULL))) |
| goto no_space_for_mount; |
| mtp->fsname = dn; |
| ln = Readlink(dn); |
| dn = (char *)NULL; |
| /* |
| * Stat() the file system (mounted-on) name and add file system |
| * information to the local mounts structure. |
| */ |
| if (!ln || statsafely(ln, &sb)) |
| sb.st_mode = 0; |
| mtp->fsnmres = ln; |
| mtp->fs_mode = sb.st_mode; |
| Lmi = mtp; |
| } |
| (void) endmntent(mfp); |
| /* |
| * Clean up and return the local nount info table address. |
| */ |
| if (dn) |
| (void) free((FREE_P *)dn); |
| Lmist = 1; |
| return(Lmi); |
| } |
| #else /* !defined(USE_LIB_READMNT) */ |
| char rmnt_d1[] = "d"; char *rmnt_d2 = rmnt_d1; |
| #endif /* defined(USE_LIB_READMNT) */ |