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authorPatrick McCarty <patrick.mccarty@linux.intel.com>2013-02-08 13:26:27 -0800
committerPatrick McCarty <patrick.mccarty@linux.intel.com>2013-02-08 13:26:27 -0800
commit9bb81f8a90ecc8b70c955bff72ec59dd3d9e5ae7 (patch)
tree881eebfa461e4f8aa6b6f44b96ac0decd3bc887a /lib/rmnt.c
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Imported Upstream version 4.87upstream/4.87
Diffstat (limited to 'lib/rmnt.c')
-rw-r--r--lib/rmnt.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/lib/rmnt.c b/lib/rmnt.c
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+++ b/lib/rmnt.c
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+/*
+ * 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) */