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ps: fix -Z (by Yuichi Nakamura <ynakam@hitachisoft.jp>)

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This commit is contained in:
Denis Vlasenko 2007-06-06 07:40:16 +00:00
parent cd0df46d8c
commit 0696b8aae8
3 changed files with 59 additions and 29 deletions
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4
include/libbb.h
View File

@ -830,6 +830,9 @@ typedef struct {
DIR *dir;
/* Fields are set to 0/NULL if failed to determine (or not requested) */
char *cmd;
USE_SELINUX(char *context;)
/* Everything below must contain no ptrs to malloc'ed data:
* it is memset(0) for each process in procps_scan() */
unsigned vsz, rss; /* we round it to kbytes */
unsigned long stime, utime;
unsigned pid;
@ -859,6 +862,7 @@ enum {
PSSCAN_STIME = 1 << 10,
PSSCAN_UTIME = 1 << 11,
PSSCAN_TTY = 1 << 12,
USE_SELINUX(PSSCAN_CONTEXT = 1 << 13,)
/* These are all retrieved from proc/NN/stat in one go: */
PSSCAN_STAT = PSSCAN_PPID | PSSCAN_PGID | PSSCAN_SID
| PSSCAN_COMM | PSSCAN_STATE

11
libbb/procps.c
View File

@ -4,7 +4,8 @@
*
* Copyright 1998 by Albert Cahalan; all rights reserved.
* Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
*
* SELinux support: (c) 2007 by Yuichi Nakamura <ynakam@hitachisoft.jp>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
@ -95,6 +96,7 @@ void free_procps_scan(procps_status_t* sp)
{
closedir(sp->dir);
free(sp->cmd);
USE_SELINUX(free(sp->context);)
free(sp);
}
@ -132,6 +134,13 @@ procps_status_t* procps_scan(procps_status_t* sp, int flags)
sp->pid = pid;
if (!(flags & ~PSSCAN_PID)) break;
#if ENABLE_SELINUX
if (flags & PSSCAN_CONTEXT) {
if (getpidcon(sp->pid, &sp->context) < 0)
sp->context = NULL;
}
#endif
filename_tail = filename + sprintf(filename, "/proc/%d", pid);
if (flags & PSSCAN_UIDGID) {

73
procps/ps.c
View File

@ -3,6 +3,8 @@
* Mini ps implementation(s) for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Fix for SELinux Support:(c)2007 Hiroshi Shinji <shiroshi@my.email.ne.jp>
(c)2007 Yuichi Nakamura <ynakam@hitachisoft.jp>
*
* Licensed under the GPL version 2, see the file LICENSE in this tarball.
*/
@ -68,6 +70,14 @@ static void func_tty(char *buf, int size, const procps_status_t *ps)
{
safe_strncpy(buf, ps->tty_str, size+1);
}
#if ENABLE_SELINUX
static void func_label(char *buf, int size, const procps_status_t *ps)
{
safe_strncpy(buf, ps->context ? ps->context : "unknown", size+1);
}
#endif
/*
static void func_nice(char *buf, int size, const procps_status_t *ps)
{
@ -116,11 +126,19 @@ static const ps_out_t out_spec[] = {
{ 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },
// Not mandated by POSIX, but useful:
{ 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
#if ENABLE_SELINUX
{ 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
#endif
};
#define VEC_SIZE(v) ( sizeof(v) / sizeof((v)[0]) )
#define DEFAULT_O_STR "pid,user" /* TODO: ,vsz,stat */ ",args"
#if ENABLE_SELINUX
#define SELINIX_O_PREFIX "label,"
#define DEFAULT_O_STR SELINIX_O_PREFIX "pid,user" /* TODO: ,vsz,stat */ ",args"
#else
#define DEFAULT_O_STR "pid,user" /* TODO: ,vsz,stat */ ",args"
#endif
struct globals {
ps_out_t* out;
@ -207,6 +225,10 @@ static void post_process(void)
}
width += out[i].width + 1; /* "FIELD " */
}
#if ENABLE_SELINUX
if (!is_selinux_enabled())
need_flags &= ~PSSCAN_CONTEXT;
#endif
buffer = xmalloc(width + 1); /* for trailing \0 */
}
@ -261,9 +283,7 @@ int ps_main(int argc, char **argv)
{
procps_status_t *p;
llist_t* opt_o = NULL;
/* Cannot be const: parse_o() will choke */
strcpy(default_o, DEFAULT_O_STR);
USE_SELINUX(int opt;)
// POSIX:
// -a Write information for all processes associated with terminals
@ -277,14 +297,25 @@ int ps_main(int argc, char **argv)
// Select which columns to display
/* We allow (and ignore) most of the above. FIXME */
opt_complementary = "o::";
getopt32(argc, argv, "o:aAdefl", &opt_o);
USE_SELINUX(opt =) getopt32(argc, argv, "Zo:aAdefl", &opt_o);
if (opt_o) {
do {
parse_o(opt_o->data);
opt_o = opt_o->link;
} while (opt_o);
} else
} else {
/* Below: parse_o() needs char*, NOT const char*... */
#if ENABLE_SELINUX
if (!(opt & 1) || !is_selinux_enabled()) {
/* no -Z or no SELinux: do not show LABEL */
strcpy(default_o, DEFAULT_O_STR + sizeof(SELINIX_O_PREFIX)-1);
} else
#endif
{
strcpy(default_o, DEFAULT_O_STR);
}
parse_o(default_o);
}
post_process();
/* Was INT_MAX, but some libc's go belly up with printf("%.*s")
@ -314,7 +345,6 @@ int ps_main(int argc, char **argv)
procps_status_t *p = NULL;
int i, len;
SKIP_SELINUX(const) int use_selinux = 0;
USE_SELINUX(security_context_t sid = NULL;)
#if !ENABLE_FEATURE_PS_WIDE
enum { terminal_width = 79 };
#else
@ -341,7 +371,7 @@ int ps_main(int argc, char **argv)
#endif
#if ENABLE_SELINUX
if ((i & 1) && is_selinux_enabled())
use_selinux = 1;
use_selinux = PSSCAN_CONTEXT;
#endif
#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
@ -356,28 +386,15 @@ int ps_main(int argc, char **argv)
| PSSCAN_STATE
| PSSCAN_VSZ
| PSSCAN_CMD
| use_selinux
))) {
char *namecmd = p->cmd;
#if ENABLE_SELINUX
if (use_selinux) {
char sbuf[128];
len = sizeof(sbuf);
if (is_selinux_enabled()) {
if (getpidcon(p->pid, &sid) < 0)
sid = NULL;
}
if (sid) {
/* I assume sid initialized with NULL */
len = strlen(sid) + 1;
safe_strncpy(sbuf, sid, len);
freecon(sid);
sid = NULL;
} else {
safe_strncpy(sbuf, "unknown", 7);
}
len = printf("%5u %-32s %s ", p->pid, sbuf, p->state);
len = printf("%5u %-32s %s ",
p->pid,
p->context ? p->context : "unknown",
p->state);
} else
#endif
{
@ -396,14 +413,14 @@ int ps_main(int argc, char **argv)
if (i < 0)
i = 0;
if (strlen(namecmd) > (size_t)i)
namecmd[i] = 0;
namecmd[i] = '\0';
puts(namecmd);
} else {
namecmd = p->comm;
if (i < 2)
i = 2;
if (strlen(namecmd) > ((size_t)i-2))
namecmd[i-2] = 0;
namecmd[i-2] = '\0';
printf("[%s]\n", namecmd);
}
}