Change process/command name? - comp.unix.solaris

Folks, How can I change the process/command name (argv[0]) in Solaris 9 so that ps command displays a different name? On AIX I can change argv[0] on HP I can use pstat. -- Hemant Shah /"\ ASCII ribbon campaign E-mail: NoJunkMailshah@xnet.com \ / --------------------- X against HTML mail TO REPLY, REMOVE NoJunkMail / \ and postings FROM MY E-MAIL ADDRESS. -----------------[DO NOT SEND UNSOLICITED BULK E-MAIL]------------------ I haven't lost my mind, Above opinions are mine only. it's backed up on tape somewhere. Others can have their own.

In article <bj2gae$cud$1@flood.xnet.com>, Hemant Shah <shah@typhoon.xnet.com> writes: > > Folks, > > How can I change the process/command name (argv[0]) in Solaris 9 > so that ps command displays a different name? > > On AIX I can change argv[0] on HP I can use pstat. You can't, so that /usr/bin/ps can see it - /usr/bin/ps looks at a saved copy of the first 80 characters of the args as they were when the program was exec'd. That's so that the process can't hide as something else, and because it's easier and more reliable to fetch that than to dig the args out of the process's address space. However, /usr/ucb/ps looks into the process to see the args as it sees them; for instance, if you have sendmail running, compare how it looks with /usr/bin/ps -fpSENDMAIL_PID and /usr/ucb/ps auxwww SENDMAIL_PID You could get the code for sendmail and find out how it does that. I think you'd want initsetproctitle() and setproctitle() in sendmail-VERSION/sendmail/conf.c (in the above, substitute for SENDMAIL_PID and VERSION as appropriate) -- mailto:rlhamil@mindwarp.smart.net http://www.smart.net/~rlhamil

While stranded on information super highway Richard L. Hamilton wrote: :)In article <bj2gae$cud$1@flood.xnet.com>, :) Hemant Shah <shah@typhoon.xnet.com> writes: :)> :)> Folks, :)> :)> How can I change the process/command name (argv[0]) in Solaris 9 :)> so that ps command displays a different name? :)> :)> On AIX I can change argv[0] on HP I can use pstat. :) :)You can't, so that /usr/bin/ps can see it - /usr/bin/ps looks at a saved :)copy of the first 80 characters of the args as they were when the :)program was exec'd. That's so that the process can't hide as something :)else, and because it's easier and more reliable to fetch that than to :)dig the args out of the process's address space. :) :)However, /usr/ucb/ps looks into the process to see the args as it sees :)them; for instance, if you have sendmail running, compare how it looks :)with :)/usr/bin/ps -fpSENDMAIL_PID :) :)and :) :)/usr/ucb/ps auxwww SENDMAIL_PID :) :)You could get the code for sendmail and find out how it does that. :)I think you'd want initsetproctitle() and setproctitle() in :)sendmail-VERSION/sendmail/conf.c :) :)(in the above, substitute for SENDMAIL_PID and VERSION :)as appropriate) Thank you. As long as Sun supports /usr/ucb/ps it will work for us. Our application runs several transactions and we change the command/process name so they are easy to identify. On sun I changed argv[0] and /usr/ucb/ps displays the new value where as /bin/ps displays the original values. :) :)-- :)mailto:rlhamil@mindwarp.smart.net http://www.smart.net/~rlhamil -- Hemant Shah /"\ ASCII ribbon campaign E-mail: NoJunkMailshah@xnet.com \ / --------------------- X against HTML mail TO REPLY, REMOVE NoJunkMail / \ and postings FROM MY E-MAIL ADDRESS. -----------------[DO NOT SEND UNSOLICITED BULK E-MAIL]------------------ I haven't lost my mind, Above opinions are mine only. it's backed up on tape somewhere. Others can have their own.

In article <bj2pj1$g8i$1@flood.xnet.com>, shah@typhoon.xnet.com says... > While stranded on information super highway Richard L. Hamilton wrote: > :)In article <bj2gae$cud$1@flood.xnet.com>, > :) Hemant Shah <shah@typhoon.xnet.com> writes: > :)> > :)> Folks, > :)> > :)> How can I change the process/command name (argv[0]) in Solaris 9 > :)> so that ps command displays a different name? > :)> > :)> On AIX I can change argv[0] on HP I can use pstat. > :) > :)You can't, so that /usr/bin/ps can see it - /usr/bin/ps looks at a saved > :)copy of the first 80 characters of the args as they were when the > :)program was exec'd. That's so that the process can't hide as something > :)else, and because it's easier and more reliable to fetch that than to > :)dig the args out of the process's address space. > :) > :)However, /usr/ucb/ps looks into the process to see the args as it sees > :)them; for instance, if you have sendmail running, compare how it looks > :)with > :)/usr/bin/ps -fpSENDMAIL_PID > :) > :)and > :) > :)/usr/ucb/ps auxwww SENDMAIL_PID > :) > :)You could get the code for sendmail and find out how it does that. > :)I think you'd want initsetproctitle() and setproctitle() in > :)sendmail-VERSION/sendmail/conf.c > :) > :)(in the above, substitute for SENDMAIL_PID and VERSION > :)as appropriate) > > > Thank you. As long as Sun supports /usr/ucb/ps it will work for us. > > Our application runs several transactions and we change the command/process > name so they are easy to identify. On sun I changed argv[0] and > /usr/ucb/ps displays the new value where as /bin/ps displays the original > values. > > > :) > :)-- > :)mailto:rlhamil@mindwarp.smart.net http://www.smart.net/~rlhamil > > If you're good at programming, you can actually change it (because no applications will write at that area, so there is no memory lock problems). Here is how you do this by hand: First, lets choose one process, with its Process info Address: # ps -efo pid,addr,comm PID ADDR COMMAND 0 104239f8 sched 1 30000b374f8 /etc/init 879 300013c0af0 mibiisa <----- THIS IS OUR PROCESS 992 300013d0ae8 /usr/lib/saf/ttymon .... .... First, you must see address of our ARGS string from process U-area, and then you replace it (all nonimportant output is deleted) # adb -kw /dev/ksyms /dev/kmem physmem f258 300013c0af0$<proc2u .... .... 300013c0fb0: psargs mibiisa -r -p 32793 ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@ 300013c1000: comm mibiisa^@^@^@^@^@^@^@^@^@^@ .... .... 300013c0fb0/30s 300013c0fb0: mibiisa -r -p 32793 300013c0fb0/W65 300013c0fb0: 0x6d696269 = 0x65 $q # ps -efo pid,addr,comm PID ADDR COMMAND 0 104239f8 sched 1 30000b374f8 /etc/init 879 300013c0af0 992 300013d0ae8 /usr/lib/saf/ttymon Hope it helps (I hope you will first test it on non-production system :) Alex

While stranded on information super highway ales.romaniuk@mobitel.si wrote: :)In article <bj2pj1$g8i$1@flood.xnet.com>, shah@typhoon.xnet.com says... :)> While stranded on information super highway Richard L. Hamilton wrote: :)> :)In article <bj2gae$cud$1@flood.xnet.com>, :)> :) Hemant Shah <shah@typhoon.xnet.com> writes: :)> :)> :)> :)> Folks, :)> :)> :)> :)> How can I change the process/command name (argv[0]) in Solaris 9 :)> :)> so that ps command displays a different name? :)> :)> :)> :)> On AIX I can change argv[0] on HP I can use pstat. :)> :) :)> :)You can't, so that /usr/bin/ps can see it - /usr/bin/ps looks at a saved :)> :)copy of the first 80 characters of the args as they were when the :)> :)program was exec'd. That's so that the process can't hide as something :)> :)else, and because it's easier and more reliable to fetch that than to :)> :)dig the args out of the process's address space. :)> :) :)> :)However, /usr/ucb/ps looks into the process to see the args as it sees :)> :)them; for instance, if you have sendmail running, compare how it looks :)> :)with :)> :)/usr/bin/ps -fpSENDMAIL_PID :)> :) :)> :)and :)> :) :)> :)/usr/ucb/ps auxwww SENDMAIL_PID :)> :) :)> :)You could get the code for sendmail and find out how it does that. :)> :)I think you'd want initsetproctitle() and setproctitle() in :)> :)sendmail-VERSION/sendmail/conf.c :)> :) :)> :)(in the above, substitute for SENDMAIL_PID and VERSION :)> :)as appropriate) :)> :)> :)> Thank you. As long as Sun supports /usr/ucb/ps it will work for us. :)> :)> Our application runs several transactions and we change the command/process :)> name so they are easy to identify. On sun I changed argv[0] and :)> /usr/ucb/ps displays the new value where as /bin/ps displays the original :)> values. :)> :)> :)> :) :)> :)-- :)> :)mailto:rlhamil@mindwarp.smart.net http://www.smart.net/~rlhamil :)> :)> :)If you're good at programming, you can actually change it (because no :)applications will write at that area, so there is no memory lock :)problems). :)Here is how you do this by hand: :) :)First, lets choose one process, with its Process info Address: :)# ps -efo pid,addr,comm :) PID ADDR COMMAND :) 0 104239f8 sched :) 1 30000b374f8 /etc/init :) 879 300013c0af0 mibiisa <----- THIS IS OUR PROCESS :) 992 300013d0ae8 /usr/lib/saf/ttymon :)... :)... :) :)First, you must see address of our ARGS string from process U-area, and :)then you replace it (all nonimportant output is deleted) :)# adb -kw /dev/ksyms /dev/kmem :)physmem f258 :)300013c0af0$<proc2u :)... :)... :)300013c0fb0: psargs mibiisa -r -p 32793 :)^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ :) :)^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ :) ^@^@^@^@^@^@^@^@^@^@ :)300013c1000: comm mibiisa^@^@^@^@^@^@^@^@^@^@ :)... :)... :)300013c0fb0/30s :)300013c0fb0: mibiisa -r -p 32793 :)300013c0fb0/W65 :)300013c0fb0: 0x6d696269 = 0x65 :)$q :)# ps -efo pid,addr,comm :) PID ADDR COMMAND :) 0 104239f8 sched :) 1 30000b374f8 /etc/init :) 879 300013c0af0 :) 992 300013d0ae8 /usr/lib/saf/ttymon :) :) :) :) :) :) :) :)Hope it helps (I hope you will first test it on non-production system :) :)Alex This won't work for us because we need to do this dynamically while the process it running. Example: When we start the server it runs a process (ServerProc.ServerName), The name of the executable is server. When the user connects to the ServerProc it forks a process (we call it UserProc.UserName). When user runs a transaction UserProc forks another process (we call it TransProc.UserName.TranName). We need to change the name after the process is created. We change argv[0] after the processes is created. If we use /usr/bin/ps or /bin/ps we get server server server server server If we use /usr/ucb/ps we get ServerProc.H105 UserProc.shah TransProc.shah.ADM1 UserProc.potter TransProc.potter.ADM1 -- Hemant Shah /"\ ASCII ribbon campaign E-mail: NoJunkMailshah@xnet.com \ / --------------------- X against HTML mail TO REPLY, REMOVE NoJunkMail / \ and postings FROM MY E-MAIL ADDRESS. -----------------[DO NOT SEND UNSOLICITED BULK E-MAIL]------------------ I haven't lost my mind, Above opinions are mine only. it's backed up on tape somewhere. Others can have their own.

In article <bj566k$h6q$1@flood.xnet.com>, shah@typhoon.xnet.com says... > his won't work for us because we need to do this dynamically while the > process it running. > But I didn't mean you would do this via adb. I wanted to show you structures and the way to do it manually. If you know PID (you know it as a result from fork()), and you're root (hope you are), then you can use library calls (see man kvm_getproc()) to get information about process. # more sys/proc.h typedef struct proc { /* * Fields requiring no explicit locking */ struct vnode *p_exec; /* pointer to a.out vnode */ struct as *p_as; /* process address space pointer */ .... .... struct user p_user; /* (see sys/user.h) */ .... .... # more sys/user.h .... .... char u_psargs[PSARGSZ]; /* arguments from exec */ char u_comm[MAXCOMLEN + 1]; .... .... Well, I never made a program for doing this, I had just searched for you right now. Perhaps is only a science fiction :) to do this, but you can try it. Regards

In article <MPG.19c0587b150c5b79989723@news.siol.net>, Glodalec <glodalec@yahoo.com> writes: > In article <bj566k$h6q$1@flood.xnet.com>, shah@typhoon.xnet.com says... >> his won't work for us because we need to do this dynamically while the >> process it running. >> > But I didn't mean you would do this via adb. I wanted to show you > structures and the way to do it manually. If you know PID (you know it > as a result from fork()), and you're root (hope you are), then you can > use library calls (see man kvm_getproc()) to get information about > process. > > # more sys/proc.h > typedef struct proc { > /* > * Fields requiring no explicit locking > */ > struct vnode *p_exec; /* pointer to a.out vnode */ > struct as *p_as; /* process address space pointer > */ > ... > ... > struct user p_user; /* (see sys/user.h) */ > ... > ... > > # more sys/user.h > ... > ... > char u_psargs[PSARGSZ]; /* arguments from exec */ > char u_comm[MAXCOMLEN + 1]; > ... > ... > > Well, I never made a program for doing this, I had just searched for you > right now. Perhaps is only a science fiction :) to do this, but you can > try it. Of course you can do this - either as a new library routine or as a loadable system call (notwithstanding that the interface for those is undocumented). But it subverts the _intentional_ difference between /usr/bin/ps and /usr/ucb/ps in that regard, and I don't think that's a good thing (and of course writing into kernel storage isn't a real good idea anyway; some kernel patch could come along and break it big time, at which point you'd be wondering why you were crashing, corrupting files, etc.) There's no question that it's theoretically possible, but that doesn't necessarily make it sensible. -- mailto:rlhamil@mindwarp.smart.net http://www.smart.net/~rlhamil

While stranded on information super highway Glodalec wrote: :)In article <bj566k$h6q$1@flood.xnet.com>, shah@typhoon.xnet.com says... :)> his won't work for us because we need to do this dynamically while the :)> process it running. :)> :)But I didn't mean you would do this via adb. I wanted to show you :)structures and the way to do it manually. If you know PID (you know it :)as a result from fork()), and you're root (hope you are), then you can :)use library calls (see man kvm_getproc()) to get information about :)process. Thanks. I will take a look at the man page and try it out. :) :)# more sys/proc.h :)typedef struct proc { :) /* :) * Fields requiring no explicit locking :) */ :) struct vnode *p_exec; /* pointer to a.out vnode */ :) struct as *p_as; /* process address space pointer :)*/ :)... :)... :)struct user p_user; /* (see sys/user.h) */ :)... :)... :) :)# more sys/user.h :)... :)... :) char u_psargs[PSARGSZ]; /* arguments from exec */ :) char u_comm[MAXCOMLEN + 1]; :)... :)... :) :)Well, I never made a program for doing this, I had just searched for you :)right now. Perhaps is only a science fiction :) to do this, but you can :)try it. :) :)Regards -- Hemant Shah /"\ ASCII ribbon campaign E-mail: NoJunkMailshah@xnet.com \ / --------------------- X against HTML mail TO REPLY, REMOVE NoJunkMail / \ and postings FROM MY E-MAIL ADDRESS. -----------------[DO NOT SEND UNSOLICITED BULK E-MAIL]------------------ I haven't lost my mind, Above opinions are mine only. it's backed up on tape somewhere. Others can have their own.

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