List of Solaris commands for process management

原文地址：http://it.toolbox.com/wiki/index.php/List_of_Solaris_commands_for_process_management

List of Solaris commands for process management

Commands

apptrace – for tracing library calls
dtrace – debugger, new in version 10
pargs – get list of arguments and environment variables with which process was started
pfiles – list of file descriptors, associated with process
pgrep – get the PID's of processes by name i.e. Something like ps -efl|grep -v grep|grep process_name
pkill – send signal to process. For example pkill -9 init:-P
pldd – list dynamic libraries, associated with process, similar to ldd for executable
plockstat – see list of locked by process files. Lock can be mutex i.e. exclusive and reader/writer for shared access
pmap – get memory map (segments) of process
preap – try to kick-off zombie process
prstat – fullscreen view of processes sorted by different criteria, similar to Linux top command
prun – continue hold with pstop process
ps - print process information and status. In Solaris exist SYSV and BSD variants, respectively /usr/bin/ps and /usr/ucb/ps
psig – list signals that can be handled by process
pstack – get backtrace stack of process for debugging purposes
pstop – temporary hold process
ptree - print the tree of processes
pwait – wait till process finish
pwdx – list working directory for process, like pwd command
truss – for tracing user/library/system calls and signals

[ edit]

Examples

apptrace

# apptrace man
-> man      -> libc.so.1:int atexit(int (*)() = 0xd27d6bfc)
<- man      -> libc.so.1:atexit()
-> man      -> libc.so.1:int atexit(int (*)() = 0x8054e8c)
<- man      -> libc.so.1:atexit()
-> man      -> libc.so.1:void __fpstart(void)
<- man      -> libc.so.1:__fpstart() = 0xd251fc94
-> man      -> libc.so.1:access(0x8055984, 0x1, 0x8047e30) ** NR
-> man      -> libc.so.1:char * setlocale(int = 0x6, const char * = 0x8055980 "")
<- man      -> libc.so.1:setlocale() = 0xd25002ed
-> man      -> libc.so.1:char * setlocale(int = 0x5, const char * = 0x0 <NULL>)
<- man      -> libc.so.1:setlocale() = 0xd25002ed
-> man      -> libc.so.1:strcpy(0x80669e8, 0xd25002ed, 0x8047e30) ** NR
-> man      -> libc.so.1:int strcmp(const char * = 0x805597c "C", const char * = 0x80669e8 "C")
<- man      -> libc.so.1:strcmp()
-> man      -> libc.so.1:char * textdomain(const char * = 0x8055968 "SUNW_OST_OSCMD")
<- man      -> libc.so.1:textdomain() = 0x80683e0
-> man      -> libc.so.1:strcpy(0x80665e8, 0x8055960, 0x8047e30) ** NR
-> man      -> libc.so.1:char * getenv(const char * = 0x8054fc0 "MANPATH")
<- man      -> libc.so.1:getenv()
-> man      -> libc.so.1:strrchr(0x8047e98, 0x2f, 0x8047e30) ** NR
-> man      -> libc.so.1:int strcmp(const char * = 0x8047e98 "man", const char * = 0x8054fb8 "apropos")
<- man      -> libc.so.1:strcmp() = 0xc
-> man      -> libc.so.1:int strcmp(const char * = 0x8047e98 "man", const char * = 0x8055958 "whatis")
<- man      -> libc.so.1:strcmp() = 0xfffffff6
-> man      -> libc.so.1:int strcmp(const char * = 0x8047e98 "man", const char * = 0x8055944 "catman")
<- man      -> libc.so.1:strcmp() = 0xa
-> man      -> libc.so.1:int getopt(int = 0x1, char *const * = 0x8047de4, const char * = 0x8066420 "FfkrP:M:T:ts:lad")
<- man      -> libc.so.1:getopt() = 0xffffffff
-> man      -> libc.so.1:char * gettext(const char * = 0x8055838 "usage:        man [-] [-adFlrt] [-M path] [-T macro-package ] [ -s  section ] name ...
        man [-M path] -k keyword ...
        man [-M path] -f file ...")
<- man      -> libc.so.1:gettext() = 0x8055838
-> man      -> libc.so.1:int fprintf(FILE * = 0x8067610, const char * = 0x8054f7c "%s
", void * = 0x8055838, ...)
usage:  man [-] [-adFlrt] [-M path] [-T macro-package ] [ -s section ] name ...
        man [-M path] -k keyword ...
        man [-M path] -f file ...
<- man      -> libc.so.1:fprintf() = 0x88
-> man      -> libc.so.1:exit(0x2, 0x8047e30, 0x8047da0) ** NR

in the above example you can clearly see library calls as fprintf(), strcmp(), getenv(), etc.

---

pargs

# pargs 558
558:    /usr/lib/sendmail -Ac -q15m
argv[0]: sendmail: Queue runner@00:15:00 for /var/spool/clientmqueue

argv[1]: <NULL>
argv[2]: @00:15:00 for /var/spool/clientmqueue

in above example you see the arguments for starting sendmail as a daemon

---

pfiles

# pfiles 558
558:    /usr/lib/sendmail -Ac -q15m
  Current rlimit: 1024 file descriptors
   0: S_IFCHR mode:0666 dev:270,0 ino:6815752 uid:0 gid:3 rdev:13,2
      O_RDONLY
      /devices/pseudo/mm@0:null
   1: S_IFCHR mode:0666 dev:270,0 ino:6815752 uid:0 gid:3 rdev:13,2
      O_WRONLY
      /devices/pseudo/mm@0:null
   2: S_IFCHR mode:0666 dev:270,0 ino:6815752 uid:0 gid:3 rdev:13,2
      O_WRONLY
      /devices/pseudo/mm@0:null
   3: S_IFDOOR mode:0444 dev:279,0 ino:53 uid:0 gid:0 size:0
      O_RDONLY|O_LARGEFILE FD_CLOEXEC  door to nscd[366]
      /var/run/name_service_door
   4: S_IFCHR mode:0666 dev:270,0 ino:11010052 uid:0 gid:3 rdev:21,0
      O_WRONLY FD_CLOEXEC
      /devices/pseudo/log@0:conslog
   5: S_IFREG mode:0600 dev:102,0 ino:189384 uid:25 gid:25 size:32
      O_WRONLY|O_CREAT|O_EXCL
      /var/spool/clientmqueue/sm-client.pid

Here you see a list of files as NULL, console log, some PID files. On the top you can see the maximum number of file handlers for this process, with info that can be helpful for troubleshooting of applications

---

pgrep

# pgrep named
586

Something like ps -efl|grep -v grep|grep process_name|awk '{print $1}'

# ps -e|grep -v grep|grep named|awk '{print $1}'
586

---

pkill

# pgrep named
628
# pkill named
# pgrep named
636
#

As you see, the named daemon was killed and respawned (with new PID)

---

pldd

# pldd 636
636:    /usr/sbin/named
/usr/lib/dns/liblwres.so.1.1.2
/usr/lib/dns/libdns.so.16.0.0
/usr/lib/dns/libisccfg.so.0.0.11
/usr/sfw/lib/libcrypto.so.0.9.7
/usr/lib/dns/libisccc.so.0.1.0
/usr/lib/dns/libisc.so.7.1.5
/lib/libnsl.so.1
/lib/libsocket.so.1
/lib/libscf.so.1
/lib/libpthread.so.1
/lib/libthread.so.1
/lib/libc.so.1
/lib/libdoor.so.1
/lib/libuutil.so.1
# ldd /usr/sbin/named
        liblwres.so.1 =>         /usr/lib/dns/liblwres.so.1
        libdns.so.16 =>  /usr/lib/dns/libdns.so.16
        libisccfg.so.0 =>        /usr/lib/dns/libisccfg.so.0
        libcrypto.so.0.9.7 =>    /usr/sfw/lib/libcrypto.so.0.9.7
        libisccc.so.0 =>         /usr/lib/dns/libisccc.so.0
        libisc.so.7 =>   /usr/lib/dns/libisc.so.7
        libnsl.so.1 =>   /lib/libnsl.so.1
        libsocket.so.1 =>        /lib/libsocket.so.1
        libscf.so.1 =>   /lib/libscf.so.1
        libpthread.so.1 =>       /lib/libpthread.so.1
        libthread.so.1 =>        /lib/libthread.so.1
        libc.so.1 =>     /lib/libc.so.1
        libmp.so.2 =>    /lib/libmp.so.2
        libmd5.so.1 =>   /lib/libmd5.so.1
        libdoor.so.1 =>  /lib/libdoor.so.1
        libuutil.so.1 =>         /lib/libuutil.so.1
        libm.so.2 =>     /lib/libm.so.2

Results from both commands are almost the same:-) Why? Ask SUN

---

pmap

# pmap 636
636:    /usr/sbin/named
08046000       8K rw----    [ stack ]
08050000     232K r-x--  /usr/sbin/named
08099000      16K rwx--  /usr/sbin/named
0809D000     544K rwx--    [ heap ]
D21ED000       4K rw--R    [ stack tid=4 ]
D21F0000      64K rwx--    [ anon ]
D2218000       4K rw--R    [ stack tid=3 ]
D221B000       4K rwxs-    [ anon ]
D2236000      16K rw--R    [ stack tid=2 ]
D223C000      64K rw----    [ anon ]
D224E000      64K rw----    [ anon ]
D2260000      24K rwx--    [ anon ]
D2270000       4K rwx--    [ anon ]
D2280000      24K r-x--  /lib/libuutil.so.1
D2296000       4K rw----  /lib/libuutil.so.1
D22A0000       4K r-x--  /lib/libdoor.so.1
D22B1000       4K rw----  /lib/libdoor.so.1
D22C0000       4K rwx--    [ anon ]
D22D0000     740K r-x--  /lib/libc.so.1
D2399000      24K rw----  /lib/libc.so.1
D239F000       8K rw----  /lib/libc.so.1
D23B0000      16K r-x--  /lib/libthread.so.1
D23C0000      12K r-x--  /lib/libpthread.so.1
D23D0000      88K r-x--  /lib/libscf.so.1
D23F6000       4K rw----  /lib/libscf.so.1
D2400000       4K rwx--    [ anon ]
D2410000      44K r-x--  /lib/libsocket.so.1
D242B000       4K rw----  /lib/libsocket.so.1
D2430000     512K r-x--  /lib/libnsl.so.1
D24B0000      20K rw----  /lib/libnsl.so.1
D24B5000      32K rw----  /lib/libnsl.so.1
D24C0000     228K r-x--  /usr/lib/dns/libisc.so.7.1.5
D2508000       8K rwx--  /usr/lib/dns/libisc.so.7.1.5
D2510000      24K r-x--  /usr/lib/dns/libisccc.so.0.1.0
D2525000       4K rwx--  /usr/lib/dns/libisccc.so.0.1.0
D2530000       4K rwx--    [ anon ]
D2540000     924K r-x--  /usr/sfw/lib/libcrypto.so.0.9.7
D2637000      84K rw----  /usr/sfw/lib/libcrypto.so.0.9.7
D264C000       8K rw----  /usr/sfw/lib/libcrypto.so.0.9.7
D2650000      48K r-x--  /usr/lib/dns/libisccfg.so.0.0.11
D266B000      12K rwx--  /usr/lib/dns/libisccfg.so.0.0.11
D2670000    1024K r-x--  /usr/lib/dns/libdns.so.16.0.0
D277F000      20K rwx--  /usr/lib/dns/libdns.so.16.0.0
D2790000       4K rwx--    [ anon ]
D27A0000      56K r-x--  /usr/lib/dns/liblwres.so.1.1.2
D27BD000       4K rwx--  /usr/lib/dns/liblwres.so.1.1.2
D27CA000     132K r-x--  /lib/ld.so.1
D27FB000       4K rwx--  /lib/ld.so.1
D27FC000       8K rwx--  /lib/ld.so.1
 total      5192K

This command helps in the process of fine-tuning large applications, especially for resolving emory leak issues

---

preap

# ps -efl|grep 551
 0 Z     root   551   550   0   0  -        -      0        -        -?           0:00 <defunct>
# preap 551
551: exited with status 0
# ps -efl|grep 551

In above example, this tool successfully removes zombie process. Otherwise the only way to kill them is to reboot

---

prstat

# prstat
   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP
   744 root     4376K 4080K cpu0    39    0   0:00:00 0.4% prstat/1
   560 root     6988K 1944K sleep   59    0   0:00:01 0.1% sshd/1
   468 root       31M   13M sleep   59    0   0:00:04 0.1% Xorg/1
   550 root     9576K 6856K sleep   59    0   0:00:01 0.0% dtgreet/1
   577 root     1160K  892K sleep   59    0   0:00:00 0.0% ksh/1
   366 root     3476K 2472K sleep   59    0   0:00:00 0.0% nscd/27
   699 root     6984K 1948K sleep   59    0   0:00:00 0.0% sshd/1
   506 root     6672K 4776K sleep   59    0   0:00:00 0.0% snmpd/1
   476 root     2724K 1552K sleep   59    0   0:00:00 0.0% dmispd/1
   481 root     3268K 1964K sleep   59    0   0:00:00 0.0% snmpXdmid/2
   532 root     2492K 1928K sleep   59    0   0:00:00 0.0% vold/5
   538 root     2352K 1564K sleep   59    0   0:00:00 0.0% devfsadm/6
   457 root     4448K 1668K sleep   59    0   0:00:00 0.0% dtlogin/1
   458 root     2040K 1240K sleep   59    0   0:00:00 0.0% snmpdx/1
   466 root     1468K  724K sleep   59    0   0:00:00 0.0% fbconsole/1
   413 root     1700K  700K sleep   59    0   0:00:00 0.0% smcboot/1
   562 root     1076K  824K sleep   59    0   0:00:00 0.0% sh/1
   412 root     1700K  700K sleep   59    0   0:00:00 0.0% smcboot/1
   356 root     3336K 1176K sleep   59    0   0:00:00 0.0% sshd/1
   533 root     7480K 2860K sleep   59    0   0:00:00 0.0% dtlogin/1
   411 root     1704K 1032K sleep   59    0   0:00:00 0.0% smcboot/1
   263 root     1064K  620K sleep   59    0   0:00:00 0.0% utmpd/1
   359 root     4400K 2212K sleep   59    0   0:00:00 0.0% syslogd/16
   261 root     3936K 3004K sleep   59    0   0:00:02 0.0% inetd/4
   264 root     1888K 1084K sleep   59    0   0:00:00 0.0% ttymon/1
   241 daemon   2340K 1520K sleep   59    0   0:00:00 0.0% statd/1
   122 root     1328K  904K sleep   59    0   0:00:00 0.0% powerd/3
   202 root     2228K  884K sleep   59    0   0:00:00 0.0% cron/1
    96 root     2128K 1288K sleep   59    0   0:00:00 0.0% syseventd/14
   554 root     7200K 3664K sleep   59    0   0:00:00 0.0% sshd/1
   361 root     9272K 5640K sleep   59    0   0:00:00 0.0% fmd/14
   244 daemon   2072K 1312K sleep   60  -20   0:00:00 0.0% lockd/2
    55 root     1952K  924K sleep   59    0   0:00:00 0.0% dhcpagent/1
   253 root     1700K  892K sleep   59    0   0:00:00 0.0% sac/1
   232 daemon   2288K 1012K sleep   59    0   0:00:00 0.0% rpcbind/1
   123 daemon   3908K 2016K sleep   59    0   0:00:00 0.0% kcfd/3
   117 root     2468K 1544K sleep   59    0   0:00:00 0.0% picld/4
   339 root     4252K 1592K sleep   59    0   0:00:00 0.0% automountd/3
   175 root     1852K  952K sleep   59    0   0:00:00 0.0% in.routed/1
     9 root     9000K 8068K sleep   59    0   0:00:11 0.0% svc.configd/18
     7 root     8888K 7940K sleep   59    0   0:00:05 0.0% svc.startd/13
   260 root     1948K 1168K sleep   59    0   0:00:00 0.0% ttymon/1

The program in default view is less informative that top, but can give you info for zones, projects and even for processes bind to specific processor. Use the -u option to limit display to specific users. Use the -p option to limit display to specific processes

---

prun- see example of pstop

---

ps

# /usr/bin/ps
   PID TTY         TIME CMD
   562 pts/2       0:00 sh
   577 pts/2       0:00 ksh
   757 pts/2       0:00 ps
# /usr/ucb/ps
   PID TT       S  TIME COMMAND
   260 console  S  0:00 /usr/lib/saf/ttymon -g -d /dev/console -l console -T sun-color -m ldterm,ttcompat -h -p unknown console lo
   562 pts/2    S  0:00 -sh
   577 pts/2    S  0:00 ksh -o ksh
   759 pts/2    O  0:00 /usr/ucb/ps
   701 pts/3    S  0:00 -sh

---

psig

# psig 636
636:    /usr/sbin/named
HUP     default
INT     default
QUIT    default
ILL     default
TRAP    default
ABRT    default
EMT     default
FPE     default
KILL    default
BUS     default
SEGV    default
SYS     default
PIPE    ignored
ALRM    default
TERM    default
USR1    default
USR2    default
CLD     default                 NOCLDSTOP
PWR     default
WINCH   default
URG     default
POLL    default
STOP    default
TSTP    ignored
CONT    default
TTIN    ignored
TTOU    ignored
VTALRM  default
PROF    default
XCPU    default
XFSZ    ignored
WAITING default
LWP     default
FREEZE  default
THAW    default
CANCEL  default
LOST    default
XRES    default
JVM1    default
JVM2    default
RTMIN   default
RTMIN+1 default
RTMIN+2 default
RTMIN+3 default
RTMAX-3 default
RTMAX-2 default
RTMAX-1 default
RTMAX   default

---

pstack

# pstack 636
636:    /usr/sbin/named
----------------------  lwp# 1 / thread# 1  --------------------------
 d23700a5 sigtimedwait (8047ce0, 8047cf0, 0)
 d23655a6 sigwait  (8047dc0) + 1c
 d235e206 __posix_sigwait (8047dc0, 8047e60) + 2e
 d24db3dd isc_app_run (8047ec8, 8047e60, d27fb840, 0, 8047e98, 805c33e) + 158
 08066da7 main     (1, 8047ea4, 8047eac) + fe
 0805c33e???????? (1, 8047f30, 0, 8047f40, 8047f47, 8047f5f)
----------------------  lwp# 2 / thread# 2  --------------------------
 d236fc99 lwp_park (0, 0, 0)
 d236a501 cond_wait_queue (80a2a7c, 80a2a48, 0, 0) + 3b
 d236a9fa _cond_wait (80a2a7c, 80a2a48) + 66
 d236aa3c cond_wait (80a2a7c, 80a2a48) + 21
 d236aa75 pthread_cond_wait (80a2a7c, 80a2a48) + 1b
 d24d871b dispatch (80a2a40, d2239fec, d236f93e, 80a2a40, 0, 0) + a0
 d24d8ba2 run      (80a2a40) + c
 d236f93e _thr_setup (d2262400) + 4e
 d236fc20 _lwp_start (d2262400, 0, 0, d2239ff8, d236fc20, d2262400)
----------------------  lwp# 3 / thread# 3  --------------------------
 d236fc99 lwp_park (0, d2218ec8, 0)
 d236a501 cond_wait_queue (80a2ae8, 80a2ab8, d2218ec8, 0) + 3b
 d236a8a1 cond_wait_common (80a2ae8, 80a2ab8, d2218ec8) + 1df
 d236aad5 _cond_timedwait (80a2ae8, 80a2ab8, d2218f28) + 51
 d236ab40 cond_timedwait (80a2ae8, 80a2ab8, d2218f28) + 24
 d236ab7c pthread_cond_timedwait (80a2ae8, 80a2ab8, d2218f28) + 1e
 d24e7601 isc_condition_waituntil (80a2ae8, 80a2ab8, 80a2ae0) + 81
 d24da800 run      (80a2ab0) + a2
 d236f93e _thr_setup (d21f0000) + 4e
 d236fc20 _lwp_start (d21f0000, 0, 0, d2218ff8, d236fc20, d21f0000)
----------------------  lwp# 4 / thread# 4  --------------------------
 d2370cd5 pollsys  (d21edce0, 6, 0, 0)
 d231ecca pselect  (1c, d21ede40, d21edec0, d239a868, 0, 0) + 18e
 d231efad select   (1c, d21ede40, d21edec0, 0, 0) + 6f
 d24e355c watcher  (80a5bd0) + bd
 d236f93e _thr_setup (d21f0400) + 4e
 d236fc20 _lwp_start (d21f0400, 0, 0, d21edff8, d236fc20, d21f0400)

This command can sometimes be very helpful for debugging daemons. You can see the function call stack by thread, in real-time

---

pstop

# ps -efl|grep ssh
 0 S     root   554   356   0  40 20 d419b870   1800 d4c87e72 21:03:52?           0:00 /usr/lib/ssh/sshd
 0 S     root   356     1   0  40 20 d4195320    834 d49f3432 21:02:46?           0:00 /usr/lib/ssh/sshd
 0 S     root   560   554   0  40 20 d41931a0   1747 d4c87ab2 21:05:03?           0:02 /usr/lib/ssh/sshd
 0 S     root   812   809   0  40 20 d418a270   1746 d50402f2 22:09:00?           0:00 /usr/lib/ssh/sshd
 0 S     root   809   356   0  40 20 d4189a10   1801 d4c874f2 22:08:47?           0:00 /usr/lib/ssh/sshd
# pstop 356
# ssh localhost
(here I stop with ctrl-C ssh client after 5 minutes of waiting)
# prun 356
# ssh localhost
The authenticity of host 'localhost (127.0.0.1)' can't be established.
RSA key fingerprint is da:14:db:bc:2f:e0:0f:ef:f6:3f:12:0e:f4:77:0c:00.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (RSA) to the list of known hosts.
Password:
Last login: Wed Jun 13 22:09:00 2007 from gateway
Sun Microsystems Inc.   SunOS 5.10      Generic January 2005
#

Command is interesting, but I don't see much benefit for daily tasks

---

ptree

# ptree
7     /lib/svc/bin/svc.startd
  253   /usr/lib/saf/sac -t 300
    264   /usr/lib/saf/ttymon
  260   /usr/lib/saf/ttymon -g -d /dev/console -l console -T sun-color -m ldterm,ttcomp
9     /lib/svc/bin/svc.configd
55    /sbin/dhcpagent
96    /usr/lib/sysevent/syseventd
117   /usr/lib/picl/picld
122   /usr/lib/power/powerd
123   /usr/lib/crypto/kcfd
175   /usr/sbin/in.routed
202   /usr/sbin/cron
232   /usr/sbin/rpcbind
241   /usr/lib/nfs/statd
244   /usr/lib/nfs/lockd
261   /usr/lib/inet/inetd start
263   /usr/lib/utmpd
339   /usr/lib/autofs/automountd
356   /usr/lib/ssh/sshd
  554   /usr/lib/ssh/sshd
    560   /usr/lib/ssh/sshd
      562   -sh
        577   ksh -o vi
          771   ptree
  696   /usr/lib/ssh/sshd
    699   /usr/lib/ssh/sshd
      701   -sh
359   /usr/sbin/syslogd
361   /usr/lib/fm/fmd/fmd
366   /usr/sbin/nscd
411   /usr/sadm/lib/smc/bin/smcboot
  412   /usr/sadm/lib/smc/bin/smcboot
  413   /usr/sadm/lib/smc/bin/smcboot
457   /usr/dt/bin/dtlogin -daemon
  466   /usr/openwin/bin/fbconsole -n -d:0
  468   /usr/X11/bin/Xorg:0 -depth 24 -nobanner -auth /var/dt/A:0-Zgai5a
  533   /usr/dt/bin/dtlogin -daemon
    550   dtgreet -display:0
458   /usr/lib/snmp/snmpdx -y -c /etc/snmp/conf
476   /usr/lib/dmi/dmispd
481   /usr/lib/dmi/snmpXdmid -s unknown
506   /usr/sfw/sbin/snmpd
532   /usr/sbin/vold -f /etc/vold.conf
538   devfsadmd
636   /usr/sbin/named

No need for comments:-)

---

pwait

# ps -efl|grep name
 0 S     root   875     1   0  45 20 d4188950   1298 d553ab16 22:17:58?           0:00 /usr/sbin/named
# pwait 875
(in this moment from another terminal I execute svcadm disable dns/server)
#

Maybe this command will be great in some specific scripts

---

pwdx

# pwdx 636
636:    /var/named

Can be helpful in case of strange errors when unmount some filesystem

---

truss

# truss ls
execve("/usr/bin/ls", 0x08047E40, 0x08047E48)  argc = 1
resolvepath("/usr/lib/ld.so.1", "/lib/ld.so.1", 1023) = 12
resolvepath("/usr/bin/ls", "/usr/bin/ls", 1023) = 11
sysconfig(_CONFIG_PAGESIZE)                     = 4096
xstat(2, "/usr/bin/ls", 0x08047C38)             = 0
open("/var/ld/ld.config", O_RDONLY)             Err#2 ENOENT
xstat(2, "/lib/libsec.so.1", 0x080474D0)        = 0
resolvepath("/lib/libsec.so.1", "/lib/libsec.so.1", 1023) = 16
open("/lib/libsec.so.1", O_RDONLY)              = 3
mmap(0x00010000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ALIGN, 3, 0) = 0xD27C0000
mmap(0x00010000, 139264, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON|MAP_ALIGN, -1, 0) = 0xD2790000
mmap(0xD2790000, 49071, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_TEXT, 3, 0) = 0xD2790000
mmap(0xD27AC000, 12169, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_INITDATA, 3, 49152) = 0xD27AC000
mmap(0xD27AF000, 8536, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANON, -1, 0) = 0xD27AF000
munmap(0xD279C000, 65536)                       = 0
memcntl(0xD2790000, 8776, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
close(3)                                        = 0

mmap(0x00000000, 4096, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xD2780000
xstat(2, "/lib/libc.so.1", 0x080474D0)          = 0
resolvepath("/lib/libc.so.1", "/lib/libc.so.1", 1023) = 14
open("/lib/libc.so.1", O_RDONLY)                = 3
mmap(0xD27C0000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xD27C0000
mmap(0x00010000, 856064, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON|MAP_ALIGN, -1, 0) = 0xD26A0000
mmap(0xD26A0000, 754581, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_TEXT, 3, 0) = 0xD26A0000
mmap(0xD2769000, 24239, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_INITDATA, 3, 757760) = 0xD2769000
mmap(0xD276F000, 5656, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANON, -1, 0) = 0xD276F000
munmap(0xD2759000, 65536)                       = 0
memcntl(0xD26A0000, 120300, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
close(3)                                        = 0
xstat(2, "/lib/libavl.so.1", 0x080474D0)        = 0
resolvepath("/lib/libavl.so.1", "/lib/libavl.so.1", 1023) = 16
open("/lib/libavl.so.1", O_RDONLY)              = 3
mmap(0xD27C0000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xD27C0000
mmap(0x00010000, 73728, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON|MAP_ALIGN, -1, 0) = 0xD2680000
mmap(0xD2680000, 2788, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_TEXT, 3, 0) = 0xD2680000
mmap(0xD2691000, 204, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_INITDATA, 3, 4096) = 0xD2691000
munmap(0xD2681000, 65536)                       = 0
memcntl(0xD2680000, 1056, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0
close(3)                                        = 0
munmap(0xD27C0000, 4096)                        = 0
mmap(0x00010000, 24576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON|MAP_ALIGN, -1, 0) = 0xD27C0000
getcontext(0x080479D0)
getrlimit(RLIMIT_STACK, 0x080479C8)             = 0
getpid()                                        = 786 [785]
lwp_private(0, 1, 0xD27C2000)                   = 0x000001C3
setustack(0xD27C2060)
sysi86(SI86FPSTART, 0xD276FCD8, 0x0000133F, 0x00001F80) = 0x00000001
brk(0x080651E8)                                 = 0
brk(0x080671E8)                                 = 0
time()                                          = 1181761288
ioctl(1, TCGETA, 0x08047B9C)                    = 0
ioctl(1, TIOCGWINSZ, 0x08064460)                = 0
brk(0x080671E8)                                 = 0
brk(0x080711E8)                                 = 0
lstat64(".", 0x08046A70)                        = 0
openat(-3041965, ".", O_RDONLY|O_NDELAY|O_LARGEFILE) = 3
fcntl(3, F_SETFD, 0x00000001)                   = 0
fstat64(3, 0x08047AC0)                          = 0
getdents64(3, 0xD27C4000, 8192)                 = 992
getdents64(3, 0xD27C4000, 8192)                 = 0
close(3)                                        = 0
ioctl(1, TCGETA, 0x08045E44)                    = 0
fstat64(1, 0x08045DB0)                          = 0
TT_DB       cdrom       etc         kernel      mnt         platform    system      var
write(1, " T T _ D B              ".., 88)      = 88
bin         dev         export      lib         net         proc        tmp         vol
write(1, " b i n                  ".., 88)      = 88
boot        devices     home        lost+found  opt         sbin        usr
write(1, " b o o t                ".., 76)      = 76
_exit(0)

Shows you system calls made by a process along with parameters of the function - very good for program execution traces. Use -u a.out to see user-level function calls. Note "a.out" is typed literally as "a.out" - not replaced with the name of the program