Add a new options: -m enables searching for memory-mapped files.
It is not default because it's an expensive option by nature, making the search take 2-3 times as long. PR: 17555 Submitted by: Ian Dowse <iedowse@maths.tcd.ie>
This commit is contained in:
Brian Feldman
parent
2d773b269e
commit
d0482be885
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=59029
@ -40,7 +40,7 @@
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.Nd file status
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.Sh SYNOPSIS
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.Nm fstat
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.Op Fl fnv
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.Op Fl fmnv
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.Op Fl M Ar core
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.Op Fl N Ar system
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.Op Fl p Ar pid
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@ -74,6 +74,9 @@ instead of the default
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.It Fl N
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Extract the name list from the specified system instead of the default
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.Pa /kernel .
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.It Fl m
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Include memory-mapped files in the listing; normally these are excluded
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due to the extra processing required.
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.It Fl n
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Numerical format. Print the device number (maj,min) of the filesystem
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the file resides in rather than the mount point name; for special
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@ -117,6 +120,7 @@ text - executable text inode
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wd - current working directory
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root - root inode
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tr - kernel trace file
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mmap - memory-mapped file
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.Ed
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.Pp
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If the file number is followed by an asterisk (``*''), the file is
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@ -74,6 +74,10 @@ static const char rcsid[] =
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#include <nfs/nfsnode.h>
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#include <vm/vm.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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@ -100,6 +104,7 @@ static const char rcsid[] =
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#define CDIR -2
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#define RDIR -3
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#define TRACE -4
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#define MMAP -5
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DEVS *devs;
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@ -115,6 +120,7 @@ int fsflg, /* show files on same filesystem as file(s) argument */
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int checkfile; /* true if restricting to particular files or filesystems */
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int nflg; /* (numerical) display f.s. and rdev as dev_t */
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int vflg; /* display errors in locating kernel data objects etc... */
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int mflg; /* include memory-mapped files */
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struct file **ofiles; /* buffer of pointers to file structures */
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@ -132,6 +138,7 @@ int maxfiles;
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kvm_t *kd;
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void dofiles __P((struct kinfo_proc *kp));
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void dommap __P((struct kinfo_proc *kp));
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void vtrans __P((struct vnode *vp, int i, int flag));
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int ufs_filestat __P((struct vnode *vp, struct filestat *fsp));
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int nfs_filestat __P((struct vnode *vp, struct filestat *fsp));
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@ -158,7 +165,7 @@ main(argc, argv)
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arg = 0;
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what = KERN_PROC_ALL;
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nlistf = memf = NULL;
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while ((ch = getopt(argc, argv, "fnp:u:vN:M:")) != -1)
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while ((ch = getopt(argc, argv, "fmnp:u:vN:M:")) != -1)
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switch((char)ch) {
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case 'f':
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fsflg = 1;
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@ -169,6 +176,9 @@ main(argc, argv)
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case 'N':
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nlistf = optarg;
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break;
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case 'm':
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mflg = 1;
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break;
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case 'n':
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nflg = 1;
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break;
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@ -246,6 +256,8 @@ main(argc, argv)
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if (p->kp_proc.p_stat == SZOMB)
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continue;
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dofiles(p);
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if (mflg)
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dommap(p);
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}
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exit(0);
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}
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@ -267,6 +279,9 @@ int Pid;
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case TRACE: \
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printf(" tr"); \
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break; \
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case MMAP: \
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printf(" mmap"); \
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break; \
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default: \
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printf(" %4d", i); \
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break; \
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@ -360,6 +375,65 @@ dofiles(kp)
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}
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}
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void
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dommap(kp)
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struct kinfo_proc *kp;
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{
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struct proc *p = &kp->kp_proc;
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struct vmspace vmspace;
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vm_map_t map;
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struct vm_map_entry entry;
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vm_map_entry_t entryp;
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struct vm_object object;
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vm_object_t objp;
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int prot, fflags;
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if (!KVM_READ(p->p_vmspace, &vmspace, sizeof(vmspace))) {
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dprintf(stderr, "can't read vmspace at %p for pid %d\n",
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(void *)p->p_vmspace, Pid);
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return;
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}
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map = &vmspace.vm_map;
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for (entryp = map->header.next; entryp != &p->p_vmspace->vm_map.header;
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entryp = entry.next) {
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if (!KVM_READ(entryp, &entry, sizeof(entry))) {
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dprintf(stderr,
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"can't read vm_map_entry at %p for pid %d\n",
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(void *)entryp, Pid);
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return;
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}
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if (entry.eflags & MAP_ENTRY_IS_SUB_MAP)
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continue;
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if ((objp = entry.object.vm_object) == NULL)
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continue;
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for (; objp; objp = object.backing_object) {
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if (!KVM_READ(objp, &object, sizeof(object))) {
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dprintf(stderr,
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"can't read vm_object at %p for pid %d\n",
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(void *)objp, Pid);
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return;
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}
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}
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prot = entry.protection;
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fflags = (prot & VM_PROT_READ ? FREAD : 0) |
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(prot & VM_PROT_WRITE ? FWRITE : 0);
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switch (object.type) {
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case OBJT_VNODE:
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vtrans((struct vnode *)object.handle, MMAP, fflags);
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break;
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default:
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break;
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}
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}
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}
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void
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vtrans(vp, i, flag)
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struct vnode *vp;
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@ -794,6 +868,6 @@ void
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usage()
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{
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(void)fprintf(stderr,
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"usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n");
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"usage: fstat [-fmnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n");
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exit(1);
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}
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