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dproc.c
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dproc.c
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/*
* dproc.c - Linux process access functions for /proc-based lsof
*/
/*
* 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright 1997 Purdue Research Foundation.\nAll rights reserved.\n";
#endif
#include "lsof.h"
/*
* Local definitions
*/
#define FDINFO_FLAGS 0x1 /* fdinfo flags available */
#define FDINFO_POS 0x2 /* fdinfo position available */
#if defined(HASEPTOPTS)
#define FDINFO_EVENTFD_ID 0x4 /* fdinfo eventfd-id available */
#if defined(HASPTYEPT)
#define FDINFO_TTY_INDEX 0x8 /* fdinfo tty-index available */
#endif /* defined(HASPTYEPT) */
#endif /* defined(HASEPTOPTS) */
#define FDINFO_PID 0x10 /* pidfd pid available */
#define FDINFO_TFD 0x20 /* fd monitored by eventpoll fd */
#define FDINFO_BASE (FDINFO_FLAGS | FDINFO_POS)
#if defined(HASEPTOPTS)
#if defined(HASPTYEPT)
#define FDINFO_ALL (FDINFO_BASE | FDINFO_TTY_INDEX | FDINFO_EVENTFD_ID | FDINFO_PID | FDINFO_TFD)
#else /* !defined(HASPTYEPT) */
#define FDINFO_ALL (FDINFO_BASE | FDINFO_EVENTFD_ID | FDINFO_PID | FDINFO_TFD)
#endif /* defined(HASPTYEPT) */
#define FDINFO_OPTIONAL (FDINFO_ALL & ~FDINFO_BASE)
#else /* !defined(HASEPTOPTS) */
#define FDINFO_ALL (FDINFO_BASE | FDINFO_PID | FDINFO_TFD)
#endif /* defined(HASEPTOPTS) */
#define LSTAT_TEST_FILE "/"
#define LSTAT_TEST_SEEK 1
#if !defined(ULLONG_MAX)
#define ULLONG_MAX 18446744073709551615ULL
#endif /* !defined(ULLONG_MAX) */
/*
* Local structures
*/
struct l_fdinfo {
int flags; /* flags: line value */
off_t pos; /* pos: line value */
#if defined(HASEPTOPTS)
int eventfd_id;
#if defined(HASPTYEPT)
int tty_index; /* pty line index */
#endif /* defined(HASPTYEPT) */
#endif /* defined(HASEPTOPTS) */
int pid; /* for pidfd */
#define EPOLL_MAX_TFDS 32
int tfds [ EPOLL_MAX_TFDS ];
size_t tfd_count;
};
/*
* Local variables
*/
static short Cckreg; /* conditional status of regular file
* checking:
* 0 = unconditionally check
* 1 = conditionally check */
static short Ckscko; /* socket file only checking status:
* 0 = none
* 1 = check only socket files */
/*
* Local function prototypes
*/
_PROTOTYPE(static MALLOC_S alloc_cbf,(MALLOC_S len, char **cbf, MALLOC_S cbfa));
_PROTOTYPE(static int get_fdinfo,(char *p, int msk, struct l_fdinfo *fi));
_PROTOTYPE(static int getlinksrc,(char *ln, char *src, int srcl, char **rest));
_PROTOTYPE(static int isefsys,(char *path, char *type, int l,
efsys_list_t **rep, struct lfile **lfr));
_PROTOTYPE(static int nm2id,(char *nm, int *id, int *idl));
_PROTOTYPE(static int read_id_stat,(char *p, int id, char **cmd, int *ppid,
int *pgid));
_PROTOTYPE(static void process_proc_map,(char *p, struct stat *s, int ss));
_PROTOTYPE(static int process_id,(char *idp, int idpl, char *cmd, UID_ARG uid,
int pid, int ppid, int pgid, int tid,
char *tcmd));
_PROTOTYPE(static int statEx,(char *p, struct stat *s, int *ss));
_PROTOTYPE(static void snp_eventpoll, (char *p, int len, int *tfds, int tfd_count));
#if defined(HASSELINUX)
_PROTOTYPE(static int cmp_cntx_eq,(char *pcntx, char *ucntx));
#include <fnmatch.h>
/*
* cmp_cntx_eq -- compare program and user security contexts
*/
static int
cmp_cntx_eq(pcntx, ucntx)
char *pcntx; /* program context */
char *ucntx; /* user supplied context */
{
return !fnmatch(ucntx, pcntx, 0);
}
/*
* enter_cntx_arg() - enter name ecurity context argument
*/
int
enter_cntx_arg(cntx)
char *cntx; /* context */
{
cntxlist_t *cntxp;
/*
* Search the argument list for a duplicate.
*/
for (cntxp = CntxArg; cntxp; cntxp = cntxp->next) {
if (!strcmp(cntxp->cntx, cntx)) {
if (!Fwarn) {
(void) fprintf(stderr, "%s: duplicate context: %s\n",
Pn, cntx);
}
return(1);
}
}
/*
* Create and link a new context argument list entry.
*/
if (!(cntxp = (cntxlist_t *)malloc((MALLOC_S)sizeof(cntxlist_t)))) {
(void) fprintf(stderr, "%s: no space for context: %s\n", Pn, cntx);
Exit(1);
}
cntxp->f = 0;
cntxp->cntx = cntx;
cntxp->next = CntxArg;
CntxArg = cntxp;
return(0);
}
#endif /* defined(HASSELINUX) */
/*
* alloc_cbf() -- allocate a command buffer
*/
static MALLOC_S
alloc_cbf(len, cbf, cbfa)
MALLOC_S len; /* required length */
char **cbf; /* current buffer */
MALLOC_S cbfa; /* current buffer allocation */
{
if (*cbf)
*cbf = (char *)realloc((MALLOC_P *)*cbf, len);
else
*cbf = (char *)malloc(len);
if (!*cbf) {
(void) fprintf(stderr,
"%s: can't allocate command %d bytes\n", Pn, (int)len);
Exit(1);
}
return(len);
}
/*
* gather_proc_info() -- gather process information
*/
void
gather_proc_info()
{
char *cmd, *tcmd;
char cmdbuf[MAXPATHLEN];
struct dirent *dp;
unsigned char ht, pidts;
int n, nl, pgid, pid, ppid, prv, rv, tid, tpgid, tppid, tx;
static char *path = (char *)NULL;
static int pathl = 0;
static char *pidpath = (char *)NULL;
static MALLOC_S pidpathl = 0;
static MALLOC_S pidx = 0;
static DIR *ps = (DIR *)NULL;
struct stat sb;
static char *taskpath = (char *)NULL;
static int taskpathl = 0;
static char *tidpath = (char *)NULL;
static int tidpathl = 0;
DIR *ts;
UID_ARG uid;
/*
* Do one-time setup.
*/
if (!pidpath) {
pidx = strlen(PROCFS) + 1;
pidpathl = pidx + 64 + 1; /* 64 is growth room */
if (!(pidpath = (char *)malloc(pidpathl))) {
(void) fprintf(stderr,
"%s: can't allocate %d bytes for \"%s/\"<pid>\n",
Pn, (int)pidpathl, PROCFS);
Exit(1);
}
(void) snpf(pidpath, pidpathl, "%s/", PROCFS);
}
/*
* Get lock and net information.
*/
(void) make_proc_path(pidpath, pidx, &path, &pathl, "locks");
(void) get_locks(path);
(void) make_proc_path(pidpath, pidx, &path, &pathl, "net/");
(void) set_net_paths(path, strlen(path));
/*
* If only socket files have been selected, or socket files have been selected
* ANDed with other selection options, enable the skipping of regular files.
*
* If socket files and some process options have been selected, enable
* conditional skipping of regular file; i.e., regular files will be skipped
* unless they belong to a process selected by one of the specified options.
*/
if (Selflags & SELNW) {
/*
* Some network files selection options have been specified.
*/
if (Fand || !(Selflags & ~SELNW)) {
/*
* Selection ANDing or only network file options have been
* specified, so set unconditional skipping of regular files
* and socket file only checking.
*/
Cckreg = 0;
Ckscko = 1;
} else {
/*
* If ORed file selection options have been specified, or no ORed
* process selection options have been specified, enable
* unconditional file checking and clear socket file only checking.
*
* If only ORed process selection options have been specified,
* enable conditional file skipping and socket file only checking.
*/
if ((Selflags & SELFILE) || !(Selflags & SelProc))
Cckreg = Ckscko = 0;
else
Cckreg = Ckscko = 1;
}
} else {
/*
* No network file selection options were specified. Enable
* unconditional file checking and clear socket file only checking.
*/
Cckreg = Ckscko = 0;
}
/*
* Read /proc, looking for PID directories. Open each one and
* gather its process and file information.
*/
if (!ps) {
if (!(ps = opendir(PROCFS))) {
(void) fprintf(stderr, "%s: can't open %s\n", Pn, PROCFS);
Exit(1);
}
} else
(void) rewinddir(ps);
while ((dp = readdir(ps))) {
if (nm2id(dp->d_name, &pid, &n))
continue;
/*
* Build path to PID's directory.
*/
if ((pidx + n + 1 + 1) > pidpathl) {
pidpathl = pidx + n + 1 + 1 + 64;
if (!(pidpath = (char *)realloc((MALLOC_P *)pidpath, pidpathl)))
{
(void) fprintf(stderr,
"%s: can't allocate %d bytes for \"%s/%s/\"\n",
Pn, (int)pidpathl, PROCFS, dp->d_name);
Exit(1);
}
}
(void) snpf(pidpath + pidx, pidpathl - pidx, "%s/", dp->d_name);
n += (pidx + 1);
/*
* Process the PID's stat info.
*/
if (stat(pidpath, &sb))
continue;
uid = (UID_ARG)sb.st_uid;
ht = pidts = 0;
/*
* Get the PID's command name.
*/
(void) make_proc_path(pidpath, n, &path, &pathl, "stat");
if ((prv = read_id_stat(path, pid, &cmd, &ppid, &pgid)) < 0)
cmd = "(unknown)";
#if defined(HASTASKS)
/*
* Task reporting has been selected, so save the process' command
* string, so that task processing won't change it in the buffer of
* read_id_stat().
*
* Check the tasks of the process first, so that the "-p<PID> -aK"
* options work properly.
*/
else if (!IgnTasks && (Selflags & SELTASK)) {
strncpy(cmdbuf, cmd, sizeof(cmdbuf) - 1);
cmdbuf[sizeof(cmdbuf) - 1] = '\0';
cmd = cmdbuf;
(void) make_proc_path(pidpath, n, &taskpath, &taskpathl,
"task");
tx = n + 4;
if ((ts = opendir(taskpath))) {
/*
* Process the PID's tasks. Record the open files of those
* whose TIDs do not match the PID and which are themselves
* not zombies.
*/
while ((dp = readdir(ts))) {
/*
* Get the task ID. Skip the task if its ID matches the
* process PID.
*/
if (nm2id(dp->d_name, &tid, &nl))
continue;
if (tid == pid) {
pidts = 1;
continue;
}
/*
* Form the path for the TID.
*/
if ((tx + 1 + nl + 1 + 4) > tidpathl) {
tidpathl = tx + 1 + n + 1 + 4 + 64;
if (tidpath)
tidpath = (char *)realloc((MALLOC_P *)tidpath,
tidpathl);
else
tidpath = (char *)malloc((MALLOC_S)tidpathl);
if (!tidpath) {
(void) fprintf(stderr,
"%s: can't allocate %d task bytes", Pn,
tidpathl);
(void) fprintf(stderr, " for \"%s/%s/stat\"\n",
taskpath, dp->d_name);
Exit(1);
}
}
(void) snpf(tidpath, tidpathl, "%s/%s/stat", taskpath,
dp->d_name);
/*
* Check the task state.
*/
rv = read_id_stat(tidpath, tid, &tcmd, &tppid,
&tpgid);
if ((rv < 0) || (rv == 1))
continue;
/*
* Attempt to record the task.
*/
if (!process_id(tidpath, (tx + 1 + nl+ 1), cmd, uid,
pid, tppid, tpgid, tid, tcmd))
{
ht = 1;
}
}
(void) closedir(ts);
}
}
#endif /* defined(HASTASKS) */
/*
* If the main process is a task and task selection has been specified
* along with option ANDing, enter the main process temporarily as a
* task, so that the "-aK" option set lists the main process along
* with its tasks.
*/
if ((prv >= 0) && (prv != 1)) {
tid = (Fand && ht && pidts && !IgnTasks && (Selflags & SELTASK))
? pid : 0;
if ((!process_id(pidpath, n, cmd, uid, pid, ppid, pgid, tid,
(char *)NULL))
&& tid)
{
Lp->tid = 0;
}
}
}
}
/*
* get_fdinfo() - get values from /proc/<PID>fdinfo/FD
*/
static int
get_fdinfo(p, msk, fi)
char *p; /* path to fdinfo file */
int msk; /* mask for information type: e.g.,
* the FDINFO_* definition */
struct l_fdinfo *fi; /* pointer to local fdinfo values
* return structure */
{
char buf[MAXPATHLEN + 1], *ep, **fp;
FILE *fs;
int rv = 0;
unsigned long ul;
unsigned long long ull;
/*
* Signal no values returned (0) if no fdinfo pointer was provided or if the
* fdinfo path can't be opened.
*/
if (!fi)
return(0);
#if defined(HASEPTOPTS)
fi->eventfd_id = -1;
#if defined(HASPTYEPT)
fi->tty_index = -1;
#endif /* defined(HASPTYEPT) */
#endif /* defined(HASEPTOPTS) */
fi->pid = -1;
fi->tfd_count = 0;
if (!p || !*p || !(fs = fopen(p, "r")))
return(0);
/*
* Read the fdinfo file.
*/
while (fgets(buf, sizeof(buf), fs)) {
int opt_flg = 0;
if (get_fields(buf, (char *)NULL, &fp, (int *)NULL, 0) < 2)
continue;
if (!fp[0] || !*fp[0] || !fp[1] || !*fp[1])
continue;
if ((msk & FDINFO_FLAGS) && !strcmp(fp[0], "flags:")) {
/*
* Process a "flags:" line.
*/
ep = (char *)NULL;
if ((ul = strtoul(fp[1], &ep, 0)) == ULONG_MAX
|| !ep || *ep)
continue;
fi->flags = (unsigned int)ul;
if ((rv |= FDINFO_FLAGS) == msk)
break;
} else if ((msk & FDINFO_POS) && !strcmp(fp[0], "pos:")) {
/*
* Process a "pos:" line.
*/
ep = (char *)NULL;
if ((ull = strtoull(fp[1], &ep, 0)) == ULLONG_MAX
|| !ep || *ep)
continue;
fi->pos = (off_t)ull;
if ((rv |= FDINFO_POS) == msk)
break;
} else if (
((msk & FDINFO_PID) && !strcmp(fp[0], "Pid:")
&& ((opt_flg = FDINFO_PID)))
|| ((msk & FDINFO_TFD) && !strcmp(fp[0], "tfd:")
&& ((opt_flg = FDINFO_TFD)))
#if defined(HASEPTOPTS)
|| ((msk & FDINFO_EVENTFD_ID) && !strcmp(fp[0], "eventfd-id:")
&& ((opt_flg = FDINFO_EVENTFD_ID)))
#if defined(HASPTYEPT)
|| ((msk & FDINFO_TTY_INDEX) && !strcmp(fp[0], "tty-index:")
&& ((opt_flg = FDINFO_TTY_INDEX)))
#endif /* defined(HASPTYEPT) */
#endif /* defined(HASEPTOPTS) */
) {
int val;
/*
* Process a "tty-index:", "eventfd-id:", "Pid:", or "tfid:" line.
*/
ep = (char *)NULL;
if ((ul = strtoul(fp[1], &ep, 0)) == ULONG_MAX
|| !ep || *ep)
continue;
val = (int)ul;
if (val < 0) {
/*
* Oops! If integer overflow occurred, reset the field.
*/
val = -1;
}
rv |= opt_flg;
switch (opt_flg) {
#if defined(HASEPTOPTS)
case FDINFO_EVENTFD_ID:
fi->eventfd_id = val;
break;
#if defined(HASPTYEPT)
case FDINFO_TTY_INDEX:
fi->tty_index = val;
break;
#endif /* defined(HASPTYEPT) */
#endif /* defined(HASEPTOPTS) */
case FDINFO_PID:
fi->pid = val;
break;
case FDINFO_TFD:
if (fi->tfd_count < EPOLL_MAX_TFDS) {
fi->tfds [fi->tfd_count] = val;
fi->tfd_count++;
}
break;
}
if ((
/* There can be more than one tfd: lines.
So even if we found one, we can not exit the loop.
However, we can assume tfd lines are continuous. */
opt_flg != FDINFO_TFD
&& (rv == msk || (rv & FDINFO_TFD))
)
|| (
/* Too many tfds. */
opt_flg == FDINFO_TFD
&& rv == msk && fi->tfd_count == EPOLL_MAX_TFDS
))
break;
}
}
fclose(fs);
/*
* Signal via the return value what information was obtained. (0 == none)
*/
return(rv);
}
/*
* getlinksrc() - get the source path name for the /proc/<PID>/fd/<FD> link
*/
static int
getlinksrc(ln, src, srcl, rest)
char *ln; /* link path */
char *src; /* link source path return address */
int srcl; /* length of src[] */
char **rest; /* pointer to what follows the ':' in
* the link source path (NULL if no
* return requested) */
{
char *cp;
int ll;
if (rest)
*rest = (char *)NULL;
if ((ll = readlink(ln, src, srcl - 1)) < 1
|| ll >= srcl)
return(-1);
src[ll] = '\0';
if (*src == '/')
return(ll);
if ((cp = strchr(src, ':'))) {
*cp = '\0';
ll = strlen(src);
if (rest)
*rest = cp + 1;
}
return(ll);
}
/*
* initialize() - perform all initialization
*/
void
initialize()
{
int fd;
struct l_fdinfo fi;
char path[MAXPATHLEN];
struct stat sb;
/*
* Test for -i and -X option conflict.
*/
if (Fxopt && (Fnet || Nwad)) {
(void) fprintf(stderr, "%s: -i is useless when -X is specified.\n",
Pn);
usage(1, 0, 0);
}
/*
* Open LSTAT_TEST_FILE and seek to byte LSTAT_TEST_SEEK, then lstat the
* /proc/<PID>/fd/<FD> for LSTAT_TEST_FILE to see what position is reported.
* If the result is LSTAT_TEST_SEEK, enable offset reporting.
*
* If the result isn't LSTAT_TEST_SEEK, next check the fdinfo file for the
* open LSTAT_TEST_FILE file descriptor. If it exists and contains a "pos:"
* value, and if the value is LSTAT_TEST_SEEK, enable offset reporting.
*/
if ((fd = open(LSTAT_TEST_FILE, O_RDONLY)) >= 0) {
if (lseek(fd, (off_t)LSTAT_TEST_SEEK, SEEK_SET)
== (off_t)LSTAT_TEST_SEEK) {
(void) snpf(path, sizeof(path), "%s/%d/fd/%d", PROCFS, Mypid,
fd);
if (!lstat(path, &sb)) {
if (sb.st_size == (off_t)LSTAT_TEST_SEEK)
OffType = 1;
}
}
if (!OffType) {
(void) snpf(path, sizeof(path), "%s/%d/fdinfo/%d", PROCFS,
Mypid, fd);
if (get_fdinfo(path, FDINFO_POS, &fi) & FDINFO_POS) {
if (fi.pos == (off_t)LSTAT_TEST_SEEK)
OffType = 2;
}
}
(void) close(fd);
}
if (!OffType) {
if (Foffset && !Fwarn)
(void) fprintf(stderr,
"%s: WARNING: can't report offset; disregarding -o.\n",
Pn);
Foffset = 0;
Fsize = 1;
}
if (Fsv && (OffType != 2)) {
if (!Fwarn && FsvByf)
(void) fprintf(stderr,
"%s: WARNING: can't report file flags; disregarding +f.\n",
Pn);
Fsv = 0;
}
/*
* Make sure the local mount info table is loaded if doing anything other
* than just Internet lookups. (HasNFS is defined during the loading of the
* local mount table.)
*/
if (Selinet == 0)
(void) readmnt();
}
/*
* make_proc_path() - make a path in a /proc directory
*
* entry:
* pp = pointer to /proc prefix
* lp = length of prefix
* np = pointer to malloc'd buffer to receive new file's path
* nl = length of new file path buffer
* sf = new path's suffix
*
* return: length of new path
* np = updated with new path
* nl = updated with new path length
*/
int
make_proc_path(pp, pl, np, nl, sf)
char *pp; /* path prefix -- e.g., /proc/<pid>/ */
int pl; /* strlen(pp) */
char **np; /* malloc'd receiving buffer */
int *nl; /* strlen(*np) */
char *sf; /* suffix of new path */
{
char *cp;
MALLOC_S rl, sl;
sl = strlen(sf);
if ((rl = pl + sl + 1) > *nl) {
if ((cp = *np))
cp = (char *)realloc((MALLOC_P *)cp, rl);
else
cp = (char *)malloc(rl);
if (!cp) {
(void) fprintf(stderr,
"%s: can't allocate %d bytes for %s%s\n",
Pn, (int)rl, pp, sf);
Exit(1);
}
*nl = rl;
*np = cp;
}
(void) snpf(*np, *nl, "%s", pp);
(void) snpf(*np + pl, *nl - pl, "%s", sf);
return(rl - 1);
}
/*
* isefsys() -- is path on a file system exempted with -e
*
* Note: alloc_lfile() must have been called in advance.
*/
static int
isefsys(path, type, l, rep, lfr)
char *path; /* path to file */
char *type; /* unknown file type */
int l; /* link request: 0 = report
* 1 = link */
efsys_list_t **rep; /* returned Efsysl pointer, if not
* NULL */
struct lfile **lfr; /* allocated struct lfile pointer */
{
efsys_list_t *ep;
int ds, len;
struct mounts *mp;
char nmabuf[MAXPATHLEN + 1];
len = (int) strlen(path);
for (ep = Efsysl; ep; ep = ep->next) {
/*
* Look for a matching exempt file system path at the beginning of
* the file path.
*/
if (ep->pathl > len)
continue;
if (strncmp(ep->path, path, ep->pathl))
continue;
/*
* If only reporting, return information as requested.
*/
if (!l) {
if (rep)
*rep = ep;
return(0);
}
/*
* Process an exempt file.
*/
ds = 0;
if ((mp = ep->mp)) {
if (mp->ds & SB_DEV) {
Lf->dev = mp->dev;
ds = Lf->dev_def = 1;
}
if (mp->ds & SB_RDEV) {
Lf->rdev = mp->rdev;
ds = Lf->rdev_def = 1;
}
}
if (!ds)
(void) enter_dev_ch("UNKNOWN");
Lf->ntype = N_UNKN;
(void) snpf(Lf->type, sizeof(Lf->type), "%s",
(type ? type : "UNKN"));
(void) enter_nm(path);
(void) snpf(nmabuf, sizeof(nmabuf), "(%ce %s)",
ep->rdlnk ? '+' : '-', ep->path);
nmabuf[sizeof(nmabuf) - 1] = '\0';
(void) add_nma(nmabuf, strlen(nmabuf));
if (Lf->sf) {
if (lfr)
*lfr = Lf;
link_lfile();
} else if (lfr)
*lfr = (struct lfile *)NULL;
return(0);
}
return(1);
}
/*
* nm2id() - convert a name to an integer ID
*/
static int
nm2id(nm, id, idl)
char *nm; /* pointer to name */
int *id; /* pointer to ID receiver */
int *idl; /* pointer to ID length receiver */
{
register int tid, tidl;
for (*id = *idl = tid = tidl = 0; *nm; nm++) {
#if defined(__STDC__) /* { */
if (!isdigit((unsigned char)*nm))
#else /* !defined(__STDC__) } { */
if (!isascii(*nm) || !isdigit((unsigned char)*cp))
#endif /* defined(__STDC__) } */
{
return(1);
}
tid = tid * 10 + (int)(*nm - '0');
tidl++;
}
*id = tid;
*idl = tidl;
return(0);
}
/*
* open_proc_stream() -- open a /proc stream
*/
FILE *
open_proc_stream(p, m, buf, sz, act)
char *p; /* pointer to path to open */
char *m; /* pointer to mode -- e.g., "r" */
char **buf; /* pointer tp setvbuf() address
* (NULL if none) */
size_t *sz; /* setvbuf() size (0 if none or if
* getpagesize() desired */
int act; /* fopen() failure action:
* 0 : return (FILE *)NULL
* <>0 : fprintf() an error message
* and Exit(1)
*/
{
FILE *fs; /* opened stream */
static size_t psz = (size_t)0; /* page size */
size_t tsz; /* temporary size */
/*
* Open the stream.
*/
if (!(fs = fopen(p, m))) {
if (!act)
return((FILE *)NULL);
(void) fprintf(stderr, "%s: can't fopen(%s, \"%s\"): %s\n",
Pn, p, m, strerror(errno));
Exit(1);
}
/*
* Return the stream if no buffer change is required.
*/
if (!buf)
return(fs);
/*
* Determine the buffer size required.
*/
if (!(tsz = *sz)) {
if (!psz)
psz = getpagesize();
tsz = psz;
}
/*
* Allocate a buffer for the stream, as required.
*/
if (!*buf) {
if (!(*buf = (char *)malloc((MALLOC_S)tsz))) {
(void) fprintf(stderr,
"%s: can't allocate %d bytes for %s stream buffer\n",
Pn, (int)tsz, p);
Exit(1);
}
*sz = tsz;
}
/*
* Assign the buffer to the stream.
*/
if (setvbuf(fs, *buf, _IOFBF, tsz)) {
(void) fprintf(stderr, "%s: setvbuf(%s)=%d failure: %s\n",
Pn, p, (int)tsz, strerror(errno));
Exit(1);
}
return(fs);
}
/*
* process_id - process ID: PID or LWP
*
* return: 0 == ID processed
* 1 == ID not processed
*/
static int
process_id(idp, idpl, cmd, uid, pid, ppid, pgid, tid, tcmd)
char *idp; /* pointer to ID's path */
int idpl; /* pointer to ID's path length */
char *cmd; /* pointer to ID's command */
UID_ARG uid; /* ID's UID */
int pid; /* ID's PID */
int ppid; /* parent PID */
int pgid; /* parent GID */
int tid; /* task ID, if non-zero */
char *tcmd; /* task command, if non-NULL) */
{
int av = 0;
static char *dpath = (char *)NULL;
static int dpathl = 0;
short efs, enls, enss, lnk, oty, pn, pss, sf;
int fd, i, ls, n, ss, sv;
struct l_fdinfo fi;
DIR *fdp;
struct dirent *fp;
static char *ipath = (char *)NULL;
static int ipathl = 0;
int j = 0;
struct lfile *lfr;
struct stat lsb, sb;
char nmabuf[MAXPATHLEN + 1], pbuf[MAXPATHLEN + 1];
static char *path = (char *)NULL;
static int pathl = 0;
static char *pathi = (char *)NULL;
static int pathil = 0;
char *rest;
int txts = 0;
#if defined(HASSELINUX)
cntxlist_t *cntxp;
#endif /* defined(HASSELINUX) */
/*
* See if process is excluded.
*/
if (is_proc_excl(pid, pgid, uid, &pss, &sf, tid)
|| is_cmd_excl(cmd, &pss, &sf))
{
#if defined(HASEPTOPTS)
if (!FeptE)
return(1);
#else /* !defined(HASEPTOPTS) */
return(1);
#endif /* defined(HASEPTOPTS) */
}
if (Cckreg && !FeptE) {
/*
* If conditional checking of regular files is enabled, enable
* socket file only checking, based on the process' selection
* status.
*/
Ckscko = (sf & SelProc) ? 0 : 1;
}
alloc_lproc(pid, pgid, ppid, uid, cmd, (int)pss, (int)sf);
Plf = (struct lfile *)NULL;
#if defined(HASTASKS)
/*
* Enter task information.
*/
Lp->tid = tid;
if (tid && tcmd) {
if (!(Lp->tcmd = mkstrcpy(tcmd, (MALLOC_S *)NULL))) {