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arg.c
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2491 lines (2318 loc) · 53.6 KB
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/*
* arg.c - common argument processing support 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: arg.c,v 1.50 2011/09/07 19:13:49 abe Exp $";
#endif
#include "lsof.h"
/*
* Local definitions
*/
#define CMDRXINCR 32 /* CmdRx[] allocation increment */
/*
* Local static variables
*/
static int NCmdRxA = 0; /* space allocated to CmdRx[] */
/*
* Local function prototypes
*/
_PROTOTYPE(static int ckfd_range,(char *first, char *dash, char *last, int *lo, int *hi));
_PROTOTYPE(static int enter_fd_lst,(char *nm, int lo, int hi, int excl));
_PROTOTYPE(static int enter_nwad,(struct nwad *n, int sp, int ep, char *s, struct hostent *he));
_PROTOTYPE(static struct hostent *lkup_hostnm,(char *hn, struct nwad *n));
_PROTOTYPE(static char *isIPv4addr,(char *hn, unsigned char *a, int al));
/*
* ckfd_range() - check fd range
*/
static int
ckfd_range(first, dash, last, lo, hi)
char *first; /* starting character */
char *dash; /* '-' location */
char *last; /* '\0' location */
int *lo; /* returned low value */
int *hi; /* returned high value */
{
char *cp;
/*
* See if the range character pointers make sense.
*/
if (first >= dash || dash >= last) {
(void) fprintf(stderr, "%s: illegal FD range for -d: ", Pn);
safestrprt(first, stderr, 1);
return(1);
}
/*
* Assemble and check the high and low values.
*/
for (cp = first, *lo = 0; *cp && cp < dash; cp++) {
if (!isdigit((unsigned char)*cp)) {
FD_range_nondigit:
(void) fprintf(stderr, "%s: non-digit in -d FD range: ", Pn);
safestrprt(first, stderr, 1);
return(1);
}
*lo = (*lo * 10) + (int)(*cp - '0');
}
for (cp = dash+1, *hi = 0; *cp && cp < last; cp++) {
if (!isdigit((unsigned char)*cp))
goto FD_range_nondigit;
*hi = (*hi * 10) + (int)(*cp - '0');
}
if (*lo >= *hi) {
(void) fprintf(stderr, "%s: -d FD range's low >= its high: ", Pn);
safestrprt(first, stderr, 1);
return(1);
}
return(0);
}
/*
* ck_file_arg() - check file arguments
*/
int
ck_file_arg(i, ac, av, fv, rs, sbp)
int i; /* first file argument index */
int ac; /* argument count */
char *av[]; /* argument vector */
int fv; /* Ffilesys value (real or temporary) */
int rs; /* Readlink() status if argument count == 1:
* 0 = undone; 1 = done */
struct stat *sbp; /* if non-NULL, pointer to stat(2) buffer
* when argument count == 1 */
{
char *ap, *fnm, *fsnm, *path;
short err = 0;
int fsm, ftype, j, k;
MALLOC_S l;
struct mounts *mp;
static struct mounts **mmp = (struct mounts **)NULL;
int mx, nm;
static int nma = 0;
struct stat sb;
struct sfile *sfp;
short ss = 0;
#if defined(CKFA_EXPDEV)
dev_t dev, rdev;
#endif /* defined(CKFA_EXPDEV) */
#if defined(HASPROCFS)
unsigned char ad, an;
int pfsnl = -1;
pid_t pid;
struct procfsid *pfi;
#endif /* defined(HASPROCFS) */
/*
* Loop through arguments.
*/
for (; i < ac; i++) {
if (rs && (ac == 1) && (i == 0))
path = av[i];
else {
if (!(path = Readlink(av[i]))) {
ErrStat = 1;
continue;
}
}
/*
* Remove terminating `/' characters from paths longer than one.
*/
j = k = strlen(path);
while ((k > 1) && (path[k-1] == '/')) {
k--;
}
if (k < j) {
if (path != av[i])
path[k] = '\0';
else {
if (!(ap = (char *)malloc((MALLOC_S)(k + 1)))) {
(void) fprintf(stderr, "%s: no space for copy of %s\n",
Pn, path);
Exit(1);
}
(void) strncpy(ap, path, k);
ap[k] = '\0';
path = ap;
}
}
/*
* Check for file system argument.
*/
for (ftype = 1, mp = readmnt(), nm = 0;
(fv != 1) && mp;
mp = mp->next)
{
fsm = 0;
if (strcmp(mp->dir, path) == 0)
fsm++;
else if (fv == 2 || (mp->fs_mode & S_IFMT) == S_IFBLK) {
if (mp->fsnmres && strcmp(mp->fsnmres, path) == 0)
fsm++;
}
if (!fsm)
continue;
ftype = 0;
/*
* Skip duplicates.
*/
for (mx = 0; mx < nm; mx++) {
if (strcmp(mp->dir, mmp[mx]->dir) == 0
&& mp->dev == mmp[mx]->dev
&& mp->rdev == mmp[mx]->rdev
&& mp->inode == mmp[mx]->inode)
break;
}
if (mx < nm)
continue;
/*
* Allocate space for and save another mount point match and
* the type of match -- directory name (mounted) or file system
* name (mounted-on).
*/
if (nm >= nma) {
nma += 5;
l = (MALLOC_S)(nma * sizeof(struct mounts *));
if (mmp)
mmp = (struct mounts **)realloc((MALLOC_P *)mmp, l);
else
mmp = (struct mounts **)malloc(l);
if (!mmp) {
(void) fprintf(stderr,
"%s: no space for mount pointers\n", Pn);
Exit(1);
}
}
mmp[nm++] = mp;
}
if (fv == 2 && nm == 0) {
(void) fprintf(stderr, "%s: not a file system: ", Pn);
safestrprt(av[i], stderr, 1);
ErrStat = 1;
continue;
}
/*
* Loop through the file system matches. If there were none, make one
* pass through the loop, using simply the path name.
*/
mx = 0;
do {
/*
* Allocate an sfile structure and fill in the type and link.
*/
if (!(sfp = (struct sfile *)malloc(sizeof(struct sfile)))) {
(void) fprintf(stderr, "%s: no space for files\n", Pn);
Exit(1);
}
sfp->next = Sfile;
Sfile = sfp;
sfp->f = 0;
if ((sfp->type = ftype)) {
/*
* For a non-file system path, use the path as the file name
* and set a NULL file system name.
*/
fnm = path;
fsnm = (char *)NULL;
/*
* Stat the path to obtain its characteristics.
*/
if (sbp && (ac == 1))
sb = *sbp;
else {
if (statsafely(fnm, &sb) != 0) {
int en = errno;
(void) fprintf(stderr, "%s: status error on ", Pn);
safestrprt(fnm, stderr, 0);
(void) fprintf(stderr, ": %s\n", strerror(en));
Sfile = sfp->next;
(void) free((FREE_P *)sfp);
ErrStat = 1;
continue;
}
#if defined(HASSPECDEVD)
(void) HASSPECDEVD(fnm, &sb);
#endif /* defined(HASSPECDEVD) */
}
sfp->i = (INODETYPE)sb.st_ino;
sfp->mode = sb.st_mode & S_IFMT;
#if defined(CKFA_EXPDEV)
/*
* Expand device numbers before saving, so that they match the
* already-expanded local mount info table device numbers.
* (This is an EP/IX 2.1.1 and above artifact.)
*/
sfp->dev = expdev(sb.st_dev);
sfp->rdev = expdev(sb.st_rdev);
#else /* !defined(CKFA_EXPDEV) */
sfp->dev = sb.st_dev;
sfp->rdev = sb.st_rdev;
#endif /* defined(CKFA_EXPDEV) */
#if defined(CKFA_MPXCHAN)
/*
* Save a (possible) multiplexed channel number. (This is an
* AIX artifact.)
*/
sfp->ch = getchan(path);
#endif /* defined(CKFA_MPXCHAN) */
} else {
mp = mmp[mx++];
ss++;
#if defined(HASPROCFS)
/*
* If this is a /proc file system, set the search flag and
* abandon the sfile entry.
*/
if (mp == Mtprocfs) {
Sfile = sfp->next;
(void) free((FREE_P *)sfp);
Procsrch = 1;
continue;
}
#endif /* defined(HASPROCFS) */
/*
* Derive file name and file system name for a mount point.
*
* Save the device numbers, inode number, and modes.
*/
fnm = mp->dir;
fsnm = mp->fsname;
sfp->dev = mp->dev;
sfp->rdev = mp->rdev;
sfp->i = mp->inode;
sfp->mode = mp->mode & S_IFMT;
}
ss = 1; /* indicate a "safe" stat() */
/*
* Store the file name and file system name pointers in the sfile
* structure, allocating space as necessary.
*/
if (!fnm || fnm == path) {
sfp->name = fnm;
#if defined(HASPROCFS)
an = 0;
#endif /* defined(HASPROCFS) */
} else {
if (!(sfp->name = mkstrcpy(fnm, (MALLOC_S *)NULL))) {
(void) fprintf(stderr,
"%s: no space for file name: ", Pn);
safestrprt(fnm, stderr, 1);
Exit(1);
}
#if defined(HASPROCFS)
an = 1;
#endif /* defined(HASPROCFS) */
}
if (!fsnm || fsnm == path) {
sfp->devnm = fsnm;
#if defined(HASPROCFS)
ad = 0;
#endif /* defined(HASPROCFS) */
} else {
if (!(sfp->devnm = mkstrcpy(fsnm, (MALLOC_S *)NULL))) {
(void) fprintf(stderr,
"%s: no space for file system name: ", Pn);
safestrprt(fsnm, stderr, 1);
Exit(1);
}
#if defined(HASPROCFS)
ad = 1;
#endif /* defined(HASPROCFS) */
}
if (!(sfp->aname = mkstrcpy(av[i], (MALLOC_S *)NULL))) {
(void) fprintf(stderr,
"%s: no space for argument file name: ", Pn);
safestrprt(av[i], stderr, 1);
Exit(1);
}
#if defined(HASPROCFS)
/*
* See if this is an individual member of a proc file system.
*/
if (!Mtprocfs || Procsrch)
continue;
# if defined(HASFSTYPE) && HASFSTYPE==1
if (strcmp(sb.st_fstype, HASPROCFS) != 0)
continue;
# endif /* defined(HASFSTYPE) && HASFSTYPE==1 */
if (pfsnl == -1)
pfsnl = strlen(Mtprocfs->dir);
if (!pfsnl)
continue;
if (strncmp(Mtprocfs->dir, path, pfsnl) != 0)
continue;
if (path[pfsnl] != '/')
# if defined(HASPINODEN)
pid = 0;
# else /* !defined(HASPINODEN) */
continue;
# endif /* defined(HASPINODEN) */
else {
for (j = pfsnl+1; path[j]; j++) {
if (!isdigit((unsigned char)path[j]))
break;
}
if (path[j] || (j - pfsnl - 1) < 1
|| (sfp->mode & S_IFMT) != S_IFREG)
# if defined(HASPINODEN)
pid = 0;
# else /* !defined(HASPINODEN) */
continue;
# endif /* defined(HASPINODEN) */
else
pid = atoi(&path[pfsnl+1]);
}
if (!(pfi = (struct procfsid *)malloc((MALLOC_S)
sizeof(struct procfsid))))
{
(void) fprintf(stderr, "%s: no space for %s ID: ",
Pn, Mtprocfs->dir);
safestrprt(path, stderr, 1);
Exit(1);
}
pfi->pid = pid;
pfi->f = 0;
pfi->nm = sfp->aname;
pfi->next = Procfsid;
Procfsid = pfi;
# if defined(HASPINODEN)
pfi->inode = (INODETYPE)sfp->i;
# endif /* defined(HASPINODEN) */
/*
* Abandon the Sfile entry, lest it be used in is_file_named().
*/
Sfile = sfp->next;
if (ad)
(void) free((FREE_P *)sfp->devnm);
if (an)
(void) free((FREE_P *)sfp->name);
(void) free((FREE_P *)sfp);
#endif /* defined(HASPROCFS) */
} while (mx < nm);
}
if (!ss)
err = 1;
return((int)err);
}
#if defined(HASDCACHE)
/*
* ctrl_dcache() - enter device cache control
*/
int
ctrl_dcache(c)
char *c; /* control string */
{
int rc = 0;
if (!c) {
(void) fprintf(stderr,
"%s: no device cache option control string\n", Pn);
return(1);
}
/*
* Decode argument function character.
*/
switch (*c) {
case '?':
if (*(c+1) != '\0') {
(void) fprintf(stderr, "%s: nothing should follow -D?\n", Pn);
return(1);
}
DChelp = 1;
return(0);
case 'b':
case 'B':
if (Setuidroot
#if !defined(WILLDROPGID)
|| Myuid
#endif /* !defined(WILLDROPGID) */
)
rc = 1;
else
DCstate = 1;
break;
case 'r':
case 'R':
if (Setuidroot && *(c+1))
rc = 1;
else
DCstate = 2;
break;
case 'u':
case 'U':
if (Setuidroot
#if !defined(WILLDROPGID)
|| Myuid
#endif /* !defined(WILLDROPGID) */
)
rc = 1;
else
DCstate = 3;
break;
case 'i':
case 'I':
if (*(c+1) == '\0') {
DCstate = 0;
return(0);
}
/* fall through */
default:
(void) fprintf(stderr, "%s: unknown -D option: ", Pn);
safestrprt(c, stderr, 1);
return(1);
}
if (rc) {
(void) fprintf(stderr, "%s: -D option restricted to root: ", Pn);
safestrprt(c, stderr, 1);
return(1);
}
/*
* Skip to optional path name and save it.
*/
for (c++; *c && (*c == ' ' || *c == '\t'); c++)
;
if (strlen(c)) {
if (!(DCpathArg = mkstrcpy(c, (MALLOC_S *)NULL))) {
(void) fprintf(stderr, "%s: no space for -D path: ", Pn);
safestrprt(c, stderr, 1);
Exit(1);
}
}
return(0);
}
#endif /* defined(HASDCACHE) */
/*
* enter_cmd_rx() - enter command regular expression
*/
int
enter_cmd_rx(x)
char *x; /* regular expression */
{
int bmod = 0;
int bxmod = 0;
int i, re;
int imod = 0;
int xmod = 0;
int co = REG_NOSUB|REG_EXTENDED;
char reb[256], *xb, *xe, *xm;
MALLOC_S xl;
char *xp = (char *)NULL;
/*
* Make sure the supplied string starts a regular expression.
*/
if (!*x || (*x != '/')) {
(void) fprintf(stderr, "%s: regexp doesn't begin with '/': ", Pn);
if (x)
safestrprt(x, stderr, 1);
return(1);
}
/*
* Skip to the end ('/') of the regular expression.
*/
xb = x + 1;
for (xe = xb; *xe; xe++) {
if (*xe == '/')
break;
}
if (*xe != '/') {
(void) fprintf(stderr, "%s: regexp doesn't end with '/': ", Pn);
safestrprt(x, stderr, 1);
return(1);
}
/*
* Decode any regular expression modifiers.
*/
for (i = 0, xm = xe + 1; *xm; xm++) {
switch(*xm) {
case 'b': /* This is a basic expression. */
if (++bmod > 1) {
if (bmod == 2) {
(void) fprintf(stderr,
"%s: b regexp modifier already used: ", Pn);
safestrprt(x, stderr, 1);
}
i = 1;
} else if (xmod) {
if (++bxmod == 1) {
(void) fprintf(stderr,
"%s: b and x regexp modifiers conflict: ", Pn);
safestrprt(x, stderr, 1);
}
i = 1;
} else
co &= ~REG_EXTENDED;
break;
case 'i': /* Ignore case. */
if (++imod > 1) {
if (imod == 2) {
(void) fprintf(stderr,
"%s: i regexp modifier already used: ", Pn);
safestrprt(x, stderr, 1);
}
i = 1;
} else
co |= REG_ICASE;
break;
case 'x': /* This is an extended expression. */
if (++xmod > 1) {
if (xmod == 2) {
(void) fprintf(stderr,
"%s: x regexp modifier already used: ", Pn);
safestrprt(x, stderr, 1);
}
i = 1;
} else if (bmod) {
if (++bxmod == 1) {
(void) fprintf(stderr,
"%s: b and x regexp modifiers conflict: ", Pn);
safestrprt(x, stderr, 1);
}
i = 1;
} else
co |= REG_EXTENDED;
break;
default:
(void) fprintf(stderr, "%s: invalid regexp modifier: %c\n",
Pn, (int)*xm);
i = 1;
}
}
if (i)
return(1);
/*
* Allocate space to hold expression and copy it there.
*/
xl = (MALLOC_S)(xe - xb);
if (!(xp = (char *)malloc(xl + 1))) {
(void) fprintf(stderr, "%s: no regexp space for: ", Pn);
safestrprt(x, stderr, 1);
Exit(1);
}
(void) strncpy(xp, xb, xl);
xp[(int)xl] = '\0';
/*
* Assign a new CmdRx[] slot for this expression.
*/
if (NCmdRxA >= NCmdRxU) {
/*
* More CmdRx[] space must be assigned.
*/
NCmdRxA += CMDRXINCR;
xl = (MALLOC_S)(NCmdRxA * sizeof(lsof_rx_t));
if (CmdRx)
CmdRx = (lsof_rx_t *)realloc((MALLOC_P *)CmdRx, xl);
else
CmdRx = (lsof_rx_t *)malloc(xl);
if (!CmdRx) {
(void) fprintf(stderr, "%s: no space for regexp: ", Pn);
safestrprt(x, stderr, 1);
Exit(1);
}
}
i = NCmdRxU;
CmdRx[i].exp = xp;
/*
* Compile the expression.
*/
if ((re = regcomp(&CmdRx[i].cx, xp, co))) {
(void) fprintf(stderr, "%s: regexp error: ", Pn);
safestrprt(x, stderr, 0);
(void) regerror(re, &CmdRx[i].cx, &reb[0], sizeof(reb));
(void) fprintf(stderr, ": %s\n", reb);
if (xp) {
(void) free((FREE_P *)xp);
xp = (char *)NULL;
}
return(1);
}
/*
* Complete the CmdRx[] table entry.
*/
CmdRx[i].mc = 0;
CmdRx[i].exp = xp;
NCmdRxU++;
return(0);
}
#if defined(HASEOPT)
/*
* enter_efsys() -- enter path of file system whose kernel blocks are to be
* eliminated
*/
int
enter_efsys(e, rdlnk)
char *e; /* file system path */
int rdlnk; /* avoid readlink(2) if non-zero */
{
char *ec; /* pointer to copy of path */
efsys_list_t *ep; /* file system path list pointer */
int i; /* temporary index */
char *path; /* Readlink() of file system path */
if (!e || (*e != '/')) {
if (!Fwarn)
(void) fprintf(stderr,
"%s: -e not followed by a file system path: \"%s\"\n",
Pn, e);
return(1);
}
if (!(ec = mkstrcpy(e, (MALLOC_S *)NULL))) {
(void) fprintf(stderr, "%s: no space for -e string: ", Pn);
safestrprt(e, stderr, 1);
Exit(1);
}
if (rdlnk)
path = ec;
else {
if (!(path = Readlink(ec)))
return(1);
}
/*
* Remove terminating `/' characters from paths longer than one.
*/
for (i = (int)strlen(path); (i > 1) && (path[i - 1] == '/'); i--) {
path[i - 1] = '\0';
}
/*
* Enter file system path on list, avoiding duplicates.
*/
for (ep = Efsysl; ep; ep = ep->next) {
if (!strcmp(ep->path, path))
return(0);
}
if (!(ep = (efsys_list_t *)malloc((MALLOC_S)(sizeof(efsys_list_t))))) {
(void) fprintf(stderr, "%s: no space for \"-e %s\" entry\n",
Pn, e);
Exit(1);
}
ep->path = path;
ep->pathl = i;
ep->rdlnk = rdlnk;
ep->mp = (struct mounts *)NULL;
if (!(ep->next = Efsysl))
Efsysl = ep;
return(0);
}
#endif /* defined(HASEOPT) */
/*
* enter_fd() - enter file descriptor list for searching
*/
int
enter_fd(f)
char *f; /* file descriptor list pointer */
{
char c, *cp1, *cp2, *dash;
int err, excl, hi, lo;
char *fc;
/*
* Check for non-empty list and make a copy.
*/
if (!f || (strlen(f) + 1) < 2) {
(void) fprintf(stderr, "%s: no file descriptor specified\n", Pn);
return(1);
}
if (!(fc = mkstrcpy(f, (MALLOC_S *)NULL))) {
(void) fprintf(stderr, "%s: no space for fd string: ", Pn);
safestrprt(f, stderr, 1);
Exit(1);
}
/*
* Isolate each file descriptor in the comma-separated list, then enter it
* in the file descriptor string list. If a descriptor has the form:
*
* [0-9]+-[0-9]+
*
* treat it as an ascending range of file descriptor numbers.
*
* Accept a leading '^' as an excusion on match.
*/
for (cp1 = fc, err = 0; *cp1;) {
if (*cp1 == '^') {
excl = 1;
cp1++;
} else
excl = 0;
for (cp2 = cp1, dash = (char *)NULL; *cp2 && *cp2 != ','; cp2++) {
if (*cp2 == '-')
dash = cp2;
}
if ((c = *cp2) != '\0')
*cp2 = '\0';
if (cp2 > cp1) {
if (dash) {
if (ckfd_range(cp1, dash, cp2, &lo, &hi))
err = 1;
else {
if (enter_fd_lst((char *)NULL, lo, hi, excl))
err = 1;
}
} else {
if (enter_fd_lst(cp1, 0, 0, excl))
err = 1;
}
}
if (c == '\0')
break;
cp1 = cp2 + 1;
}
(void) free((FREE_P *)fc);
return(err);
}
/*
* enter_fd_lst() - make an entry in the FD list, Fdl
*/
static int
enter_fd_lst(nm, lo, hi, excl)
char *nm; /* FD name (none if NULL) */
int lo; /* FD low boundary (if nm NULL) */
int hi; /* FD high boundary (if nm NULL) */
int excl; /* exclusion on match */
{
char buf[256], *cp;
int n;
struct fd_lst *f, *ft;
/*
* Don't allow a mixture of exclusions and inclusions.
*/
if (FdlTy >= 0) {
if (FdlTy != excl) {
if (!Fwarn) {
/*
* If warnings are enabled, report a mixture.
*/
if (nm) {
(void) snpf(buf, sizeof(buf) - 1, "%s%s",
excl ? "^" : "", nm);
} else {
if (lo != hi) {
(void) snpf(buf, sizeof(buf) - 1, "%s%d-%d",
excl ? "^" : "", lo, hi);
} else {
(void) snpf(buf, sizeof(buf) - 1, "%s%d",
excl ? "^" : "", lo);
}
}
buf[sizeof(buf) - 1] = '\0';
(void) fprintf(stderr,
"%s: %s in an %s -d list: %s\n", Pn,
excl ? "exclude" : "include",
FdlTy ? "exclude" : "include",
buf);
}
return(1);
}
}
/*
* Allocate an fd_lst entry.
*/
if (!(f = (struct fd_lst *)malloc((MALLOC_S)sizeof(struct fd_lst)))) {
(void) fprintf(stderr, "%s: no space for FD list entry\n", Pn);
Exit(1);
}
if (nm) {
/*
* Process an FD name. First see if it contains only digits; if it
* does, convert them to an integer and set the low and high
* boundaries to the result.
*
* If the name has a non-digit, store it as a string, and set the
* boundaries to impossible values (i.e., low > high).
*/
for (cp = nm, n = 0; *cp; cp++) {
if (!isdigit((unsigned char)*cp))
break;
n = (n * 10) + (int)(*cp - '0');
}
if (*cp) {
if (!(f->nm = mkstrcpy(nm, (MALLOC_S *)NULL))) {
(void) fprintf(stderr,
"%s: no space for copy of: %s\n", Pn, nm);
Exit(1);
}
lo = 1;
hi = 0;
} else {
f->nm = (char *)NULL;
lo = hi = n;
}
} else
f->nm = (char *)NULL;
/*
* Skip duplicates.
*/
for (ft = Fdl; ft; ft = ft->next) {
if (f->nm) {
if (!ft->nm || strcmp(f->nm, ft->nm))
continue;
} else if ((lo != ft->lo) || (hi != ft->hi))
continue;
(void) free((FREE_P *)f);
return(0);
}
/*
* Complete the fd_lst entry and link it to the head of the chain.
*/
f->hi = hi;
f->lo = lo;
f->next = Fdl;
Fdl = f;
FdlTy = excl;
return(0);
}
/*
* enter_dir() - enter the files of a directory for searching
*/
#define EDDEFFNL 128 /* default file name length */
int
enter_dir(d, descend)
char *d; /* directory path name pointer */
int descend; /* subdirectory descend flag:
* 0 = don't descend
* 1 = descend */
{
char *av[2];
dev_t ddev;
DIR *dfp;
char *dn = (char *)NULL;
MALLOC_S dnl, dnamlen;
struct DIRTYPE *dp;
int en, sl;
int fct = 0;
char *fp = (char *)NULL;
MALLOC_S fpl = (MALLOC_S)0;
MALLOC_S fpli = (MALLOC_S)0;
struct stat sb;
/*
* Check the directory path; reduce symbolic links; stat(2) it; make sure it's
* really a directory.
*/
if (!d || !*d || *d == '+' || *d == '-') {
if (!Fwarn)
(void) fprintf(stderr,
"%s: +d not followed by a directory path\n", Pn);
return(1);
}
if (!(dn = Readlink(d)))
return(1);
if (statsafely(dn, &sb)) {
if (!Fwarn) {
en = errno;