/*
 * dfile.c - NetBSD file processing functions for lsof
 */


/*
 * Copyright 1994 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright 1994 Purdue Research Foundation.\nAll rights reserved.\n";
static char *rcsid = "$Id: dfile.c,v 1.1 95/03/03 09:36:31 abe Exp $";
#endif


#include "lsof.h"


/*
 * ck_file_arg() - check file arguments
 */

int
ck_file_arg(i, ac, av)
	int i;			/* first file argument index */
	int ac;			/* argument count */
	char *av[];		/* argument vector */
{
	unsigned char ad, an;
	short err = 0;
	char *fnm, *fsnm, *path;
	int ftype, j;
	struct mounts *mp;
	struct stat sb;
	struct sfile *sfp;

#if	defined(HASPROCFS)
	struct procfsid *pfi;
	short pfsnl = -1;
	pid_t pid;
	char *pr;
#endif	/* defined(HASPROCFS) */

	for (; i < ac; i++) {
		if ((path = Readlink(av[i])) == NULL) {
			err = 1;
			continue;
		}
	/*
	 * Remove extra terminating `/'.
	 *
	 * Check for file system argument.
	 */
		if ((j = strlen(path)) > 1 && path[j-1] == '/')
			path[j-1] = '\0';
		for (ftype = 1, mp = Mtab; mp; mp = mp->next) {
			if (strcmp(mp->dir, path) == 0) {
				ftype = 0;
				fnm = path;
				fsnm = mp->fsname;
				break;
			}
			if (strcmp(mp->fsname, path) == 0) {
				ftype = 0;
				fnm = mp->dir;
				fsnm = path;
				break;
			}
		}
		if (ftype) {
			fnm = path;
			fsnm = NULL;
		} else {

#if	defined(HASPROCFS)
			if (mp == Mtprocfs) {
				Procsrch = 1;
				continue;
			}
#endif	/* defined(HASPROCFS) */

			sb.st_dev = mp->dev;
			sb.st_rdev = mp->rdev;
			sb.st_ino = mp->inode;
			sb.st_mode = mp->mode;
		}
	/*
	 * Stat the argument to obtain its mode and device.
	 */
		if (ftype && statsafely(fnm, &sb) != 0) {
			(void) fprintf(stderr, "%s: status error on %s: %s\n",
				Pn, fnm, strerror(errno));
			err = 1;
			continue;
		}
	/*
	 * Allocate an sfile structure and fill in the type, inode,
	 * find-flag and linkages.
	 */
		if ((sfp = (struct sfile *)malloc(sizeof(struct sfile)))
		== NULL) {
			(void) fprintf(stderr, "%s: no space for files\n", Pn);
			exit(1);
		}
		sfp->next = Sfile;
		Sfile = sfp;
		sfp->type = ftype;
		sfp->i = sb.st_ino;
		sfp->f = 0;
	/*
	 * Store the file name and file system name pointers in the sfile
	 * structure, allocating space as necessary.
	 */
		if (fnm == NULL || fnm == path) {
			sfp->name = fnm;
			an = 0;
		} else {
		    if ((sfp->name = (char *)malloc((MALLOC_S)(strlen(fnm)+1)))
		    == NULL) {
			(void) fprintf(stderr,
			    "%s: no space for file name %s\n", Pn, fnm);
			exit(1);
		    }
		    (void) strcpy(sfp->name, fnm);
		    an = 1;
		}
		if (fsnm == NULL || fsnm == path) {
			sfp->devnm = fsnm;
			ad = 0;
		} else {
		    if ((sfp->devnm=(char *)malloc((MALLOC_S)(strlen(fsnm)+1)))
		    == NULL) {
			(void) fprintf(stderr,
			    "%s: no space for file system name %s\n", Pn, fsnm);
			exit(1);
		    }
		    (void) strcpy(sfp->devnm, fsnm);
		    ad = 1;
		}
		if ((sfp->aname = (char *)malloc((MALLOC_S)(strlen(av[i]) + 1)))
		== NULL) {
			(void) fprintf(stderr,
			    "%s: no space for argument file name %s\n",
			    Pn, av[i]);
			exit(1);
		}
		(void) strcpy(sfp->aname, av[i]);
	/*
	 * Save the stat() buffer mode value in the sfile structure.
	 * Use st_rdev if the mode value is S_IFBLK or S_IFCHR; otherwise
	 * use st_dev.
	 */
		sfp->mode = sb.st_mode & S_IFMT;
		if (sfp->mode == S_IFBLK || sfp->mode == S_IFCHR)
			sfp->dev = sb.st_rdev;
		else
			sfp->dev = sb.st_dev;

#if	defined(HASPROCFS)
	/*
	 * See if this is an individual member of a proc file system.
	 */
		if (Mtprocfs == NULL || Procsrch)
			continue;
		if (pfsnl == -1)
			pfsnl = strlen(Mtprocfs->dir);
		if (! pfsnl)
			continue;
		if (strncmp(Mtprocfs->dir, path, pfsnl) != 0)
			continue;
		if (path[pfsnl] != '/')
			continue;
		if ((pfi = (struct procfsid *)malloc((MALLOC_S)
			    sizeof(struct procfsid)))
		== NULL) {
			(void) fprintf(stderr,
				"%s: no space for %s ID: %s\n",
				Pn, Mtprocfs->dir,path);
			exit(1);
		}
		pfi->pid = 0;

# if	defined(HASPINODEN)
		pfi->inode = (unsigned long)sb.st_ino;
# endif	/* defined(HASPINODEN) */

		pfi->next = Procfsid;
		Procfsid = pfi;
	/*
	 * Abandon the Sfile entry, lest it be used in is_file_named().
	 */
		Sfile = sfp->next;
		(void) free((FREE_P *)sfp->aname);
		if (ad)
			(void) free((FREE_P *)sfp->devnm);
		if (an)
			(void) free((FREE_P *)sfp->name);
		(void) free((FREE_P *)sfp);
#endif	/* HASPROCFS */

	}
	return((int)err);
}


/*
 * The is_file_named() function is obtained from ../common/isfn.frag.
 * The print_file() function is obtained from ../common/prtf.frag.
 * The process_file() function is obtained from ../common/prfp.frag.
 */