How to work around this compiler bug
Hi,
the following piece of code compiles fine using g++ 4.2.4, but
fails using g++ 3.3.5 in the base system:
error: operands to ?: have different types
It is part of ptlib, which is the base library for opal, which in
turn is needed for ekiga, which I'm trying to port.
What is your suggestion? Can anyone think of a workaround for
this or should I just compile it using eg++ 4.2.4 ?
Christopher
#includeerr.h
#define WarnIfNULL(x) ((x) ? (x) : (warn(blub),(x)))
class A
{
protected:
int a;
};
class B : A
{
public:
void blub()
{
WarnIfNULL(A::a);
}
};
Re: How to work around this compiler bug
On Sat, May 1, 2010 at 11:39 AM, Christopher Zimmermann madro...@zakweb.de wrote: Hi, the following piece of code compiles fine using g++ 4.2.4, but fails using g++ 3.3.5 in the base system: error: operands to ?: have different types It is part of ptlib, which is the base library for opal, which in turn is needed for ekiga, which I'm trying to port. Save yourself time, pkg_add ekiga.
Re: How to work around this compiler bug
On Sat, May 01, 2010 at 11:39:00AM +0200, Christopher Zimmermann wrote:
Hi,
the following piece of code compiles fine using g++ 4.2.4, but
fails using g++ 3.3.5 in the base system:
error: operands to ?: have different types
It is part of ptlib, which is the base library for opal, which in
turn is needed for ekiga, which I'm trying to port.
What is your suggestion? Can anyone think of a workaround for
this or should I just compile it using eg++ 4.2.4 ?
Christopher
#includeerr.h
#define WarnIfNULL(x) ((x) ? (x) : (warn(blub),(x)))
class A
{
protected:
int a;
};
class B : A
{
public:
void blub()
{
WarnIfNULL(A::a);
}
};
Why do some C++ programmer still use macros where they're not needed ?
bunch of idiots, let them stay with C.
#includeerr.h
templatetypename T
inline T WarnIfNULL(T x)
{
if (!x)
warn(blub);
return x;
}
class A
{
protected:
int a;
};
class B : A
{
public:
void blub()
{
WarnIfNULL(A::a);
}
};
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Re: How to work around this compiler bug
Christopher Zimmermann madro...@zakweb.de writes:
Hi,
the following piece of code compiles fine using g++ 4.2.4, but
fails using g++ 3.3.5 in the base system:
error: operands to ?: have different types
How about something like this...
#includeerr.h
// #define WarnIfNULL(x) ((x) ? (x) : (warn(blub),(x)))
templateclass T
inline T WarnIfNULL(T x)
{
if (!x)
warnx(blub);
return x;
}
class A
{
protected:
A() : a(0) {}
//A() : a(1) {}
int a;
};
class B : A
{
public:
void blub()
{
WarnIfNULL(A::a);
}
};
int
main()
{
B b;
b.blub();
return 0;
}
--
Mike Small
sma...@panix.com
Forking and catching SIGCHLD, si_pid always contains 0.
Hi, using 4.6 release.
I'm doing some code on process forking and catching signals on
OpenBSD. My interest here is to catch the SIGCHLD signal and do things
with the pid which sended the signal on the function called to treat it.
As said in Advanced Programming in the Unix Environment book, when
calling a sigaction function there is a siginfo_t * with data about the
process sending the signal. On this struct, the member int si_pid
contains the PID of the process sending the signal. I tried in a very
simple code to obtain the PID of the child process but si_pid member
always contains 0 when I print it, and don't know what's wrong with it.
I included a very simple source code to try this with the mail, what
I'm missing?
Google didn't helped at all.
Thanks for your time.
-J
#include signal.h
#include stdio.h
#include stdlib.h
#include sys/types.h
#include sys/wait.h
#include unistd.h
/* this func is called when SIGCHLD is received */
void mysigaction(int nsig, siginfo_t * info , void *nothing){
/* print some info values */
printf(info-si_pid: %d info-si_code: %d info-si_status: %d --\n,
info-si_pid , (*info). si_code, (*info).si_status);
printf(nsig: %d\n,nsig);
return ;
}
int main(){
struct sigaction myaction;
myaction.sa_sigaction=mysigaction;
myaction.sa_flags=SA_SIGINFO ;
/* use sa_sigaction instead sa_handler to
* have siginfo_t * values */
sigaction(SIGCHLD,myaction,(void*)NULL);
int pid=fork();
if (pid 0 ) { // father
printf(father, child pid is: %d\n,pid);
wait(NULL);
}
if (pid == 0){ // son
printf(son, getpid() returns: %d\n,getpid());
exit(0);
}
return 0;
}
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Re: How to work around this compiler bug
Use a less retarded language.
On Sat, May 01, 2010 at 11:39:00AM +0200, Christopher Zimmermann wrote:
Hi,
the following piece of code compiles fine using g++ 4.2.4, but
fails using g++ 3.3.5 in the base system:
error: operands to ?: have different types
It is part of ptlib, which is the base library for opal, which in
turn is needed for ekiga, which I'm trying to port.
What is your suggestion? Can anyone think of a workaround for
this or should I just compile it using eg++ 4.2.4 ?
Christopher
#includeerr.h
#define WarnIfNULL(x) ((x) ? (x) : (warn(blub),(x)))
class A
{
protected:
int a;
};
class B : A
{
public:
void blub()
{
WarnIfNULL(A::a);
}
};
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Re: Forking and catching SIGCHLD, si_pid always contains 0.
On Sat, May 01, 2010 at 03:59:07PM +0200, Jesus Sanchez wrote:
Hi, using 4.6 release.
I'm doing some code on process forking and catching signals on
OpenBSD. My interest here is to catch the SIGCHLD signal and do things
with the pid which sended the signal on the function called to treat it.
As said in Advanced Programming in the Unix Environment book, when
calling a sigaction function there is a siginfo_t * with data about the
process sending the signal. On this struct, the member int si_pid
contains the PID of the process sending the signal. I tried in a very
simple code to obtain the PID of the child process but si_pid member
always contains 0 when I print it, and don't know what's wrong with it.
I included a very simple source code to try this with the mail, what
I'm missing?
On OpenBSD, only a few fields are filled for a few signals. Use any of
the wait(2) functions to get your info.
-Otto
Google didn't helped at all.
Thanks for your time.
-J
#include signal.h
#include stdio.h
#include stdlib.h
#include sys/types.h
#include sys/wait.h
#include unistd.h
/* this func is called when SIGCHLD is received */
void mysigaction(int nsig, siginfo_t * info , void *nothing){
/* print some info values */
printf(info-si_pid: %d info-si_code: %d info-si_status: %d --\n,
info-si_pid , (*info). si_code, (*info).si_status);
printf(nsig: %d\n,nsig);
return ;
}
int main(){
struct sigaction myaction;
myaction.sa_sigaction=mysigaction;
myaction.sa_flags=SA_SIGINFO ;
/* use sa_sigaction instead sa_handler to
* have siginfo_t * values */
sigaction(SIGCHLD,myaction,(void*)NULL);
int pid=fork();
if (pid 0 ) { // father
printf(father, child pid is: %d\n,pid);
wait(NULL);
}
if (pid == 0){ // son
printf(son, getpid() returns: %d\n,getpid());
exit(0);
}
return 0;
}
Re: couldn't map interrupt
** Reply to message from Dave Anderson d...@daveanderson.com on Sun,
4 Apr 2010 20:30:15 -0400 (EDT)
On Thu, 1 Apr 2010, Dave Anderson wrote:
On Thu, 1 Apr 2010, Dave Anderson wrote:
I've inherited an old notebook (Sony Vaio PCG-FX120) whose CardBus slots
are (presumably) unusable because their interrupts aren't mapped:
cbb0 at pci1 dev 2 function 0 Ricoh 5C476 CardBus rev 0x80: couldn't \
map interrupt
cbb1 at pci1 dev 2 function 1 Ricoh 5C476 CardBus rev 0x80: couldn't \
map interrupt
I've updated the BIOS to the latest version I can find, and am running
current (as of March 30th). This happens both with APM and with ACPI
(APM disabled); I've included both full dmesgs below.
With ACPI there's one additional couldn't map interrupt for a device
which is configured properly with APM:
uhci0 at pci0 dev 31 function 2 Intel 82801BA USB rev 0x03: couldn't \
map interrupt
One more thing I should have mentioned: this system has a very simple
BIOS with only a few tweakable settings; I've tried them all without
changing this behavior.
I'd really like to get this working properly, since I can't afford to
buy a new system right now. If anyone is interested in looking into
this, I'd be happy to run any tests, patches or whatever; the system
isn't in use yet, so even complete reinstalls are fine.
Thanks for any help,
I bit of searching turned up 'UKCchange pcibios' and setting the flags
to 0x30; this 'verbose' dmesg plus pcidump -v ( both included below)
produce a bunch of interesting-looking information which, unfortunately,
I do not (yet) know enough to make sense of.
I also found a truly gross hack used by someone in similar circumstances
(http://www.gratisoft.us/ftp/pub/todd/OpenBSD/srx77/cardbus.diff), which
I'll try to adapt if I don't find anything better.
This is primarily for the record, though it may help someone with
similar problems.
After spending some time crawling through the code and reading PCI
specs, I determined that the underlying problem is that the BIOS is
reporting an incorrect PCI bus attachment for the Cardbus devices --
resulting in the 'how to attach interrupts' lookup failing. Since in
my case all of the device numbers in the table from the BIOS are
unique, a simple patch to match on only the device number (if there's
only one entry with that device number, and if there's no match on both
bus and device) corrects the problem and allows the interrupts to be
properly connected.
There's still a problem (which I haven't yet dug in to) where it
appears that interrupts still don't work properly if the Cardbus device
is in place when the system boots, but since it works if I hotplug it
later this is something I can live with (at least for a while).
Here's the patch (against -current as of a week or two ago):
Index: sys/arch/i386/pci/pci_intr_fixup.c
===
RCS file: /cvs/src/sys/arch/i386/pci/pci_intr_fixup.c,v
retrieving revision 1.62
diff -u sys/arch/i386/pci/pci_intr_fixup.c
--- sys/arch/i386/pci/pci_intr_fixup.c 7 Dec 2008 14:33:26 - 1.62
+++ sys/arch/i386/pci/pci_intr_fixup.c 1 May 2010 17:02:28 -
@@ -336,15 +336,29 @@
{
struct pcibios_intr_routing *pir;
int entry;
+ int dev_entry = -1;
if (pcibios_pir_table == NULL)
return (NULL);
for (entry = 0; entry pcibios_pir_table_nentries; entry++) {
pir = pcibios_pir_table[entry];
- if (pir-bus == bus
- PIR_DEVFUNC_DEVICE(pir-device) == device)
- return (pir);
+ if (PIR_DEVFUNC_DEVICE(pir-device) == device) {
+ if (pir-bus == bus)
+ return (pir);
+ else if (dev_entry == -1)
+ dev_entry = entry;
+ else
+ dev_entry = -2;
+ }
+ }
+
+ if (dev_entry = 0) {
+ pir = pcibios_pir_table[dev_entry];
+ if (pcibios_flags PCIBIOS_INTRDEBUG)
+ printf(pciintr_pir_lookup(%i,%i): matching bus %i\n,
+ bus, device, pir-bus);
+ return (pir);
}
return (NULL);
=
Dave
OpenBSD 4.7-current (GENERIC) #560: Wed Mar 24 00:26:42 MDT 2010
dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel Pentium III (GenuineIntel 686-class) 696 MHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE
real mem = 534798336 (510MB)
avail mem = 508944384 (485MB)
User Kernel Config
UKC chn\^H \^Hange pcibios
361 pcibios0 at bios0 flags 0x0
change (y/n) ?
flags [0] ? 0x30
361 pcibios0 changed
361 pcibios0 at bios0 flags 0x30
UKC quit
Continuing...
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 03/06/02, BIOS32 rev. 0 @
0xfd878, SMBIOS rev. 2.31 @ 0xd8010 (15 entries)
bios0: vendor Phoenix
Serial port programming problems
I run OpenBSD 4.6 (i386) on a PCEngines ALIX2c3, as a low power
file/web/DHCP server. I would like to have this machine regularly
retrieve data from an instrument which communicates over RS-232.
I'm using a Prolific USB-RS232 converter (full dmesg for the ALIX
below).
I have no protocol documentation but have been able to reverse engineer
a subset of the instrument's protocol. I have written a code to
extract data from the instrument which compiles cleanly on OpenBSD,
Linux (gcc) and Solaris x86 (Sun Studio). On Linux and Solaris,
the resulting binary always reads the data that I want. On OpenBSD,
the code appears to hang on every second execution, its entry in the
output of top looking similar to:
0 204K 496K idle ttyin 0:00 0.00% reader
I've come up with a minimal example to demonstrate where the problem
begins, and have pasted it below. The code sends an initialisation
string to the instrument and should get an ACK (ASCII decimal 6) back.
On Linux it works; on OpenBSD, it works the first time after insertion
of the USB-RS232 converter but not subsequently.
I don't believe this is likely to be a hardware problem with the
USB-RS232 converter, since I successfully used the same one in Linux
and Solaris. I also think it unlikely to be the USB host controller,
since I have identical behaviour on another OpenBSD box, with a
different USB controller, see lines from its dmesg:
uhci0 at pci0 dev 7 function 2 Intel 82371AB USB rev 0x01: irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0 Intel UHCI root hub rev 1.00/1.00 addr 1
uplcom0 at uhub0 port 2 Prolific Technology Inc. USB-Serial Controller
D rev 1.10/4.00 addr 2
ucom0 at uplcom0
Running on OpenBSD, either on the ALIX or on my other box, the
behaviour I see is:
# cc -Wall -o ex_obsd ex_obsd.c
# ./ex_obsd; sleep 5; ./ex_obsd; sleep 5; ./ex_obsd; sleep 5; ./ex_obsd
1 bytes available, read: 6
1 bytes available, read: 10
Expecting ACK, got 10
1 bytes available, read: 10
Expecting ACK, got 10
1 bytes available, read: 10
Expecting ACK, got 10
Running identical code (save for a change of device name) on Linux
(on another different machine), I get:
$ ./ex_lin; sleep 5; ./ex_lin; sleep 5; ./ex_lin; sleep 5; ./ex_lin
1 bytes available, read: 6
1 bytes available, read: 6
1 bytes available, read: 6
1 bytes available, read: 6
On OpenBSD, I can get the desired behaviour if I manually unplug and
re-plug the USB to serial converter during each sleep.
I'd be very grateful if anyone has any advice on what I should change
to get the desired behaviour from this code on OpenBSD.
Many thanks in advance.
Neil
My code:
#include stdio.h
#include string.h
#include unistd.h
#include fcntl.h
#include errno.h
#include termios.h
#include err.h
int open_port(void);/* Opens port, returns file descriptor */
void set_port(int fd); /* Sets port options on file descriptor fd */
int main(void)
{
int n,fd;
char resp;
char initString[] = {0x0D, 0x01, 0x39, 0x31, 0x38};
char ack = 0x06;
char eot = 0x03;
fd = open_port();
set_port(fd);
if(DEBUG != 0) printf(Port has been opened and set up\n);
// send CRSOH918
n = write(fd,initString,5);
if (n != 5) {printf(Failed to write init string.\n); return(-1);}
// See if it replies - want ACK
n = read(fd,resp,1);
printf(%i bytes available, read: %i\n,n,resp);
if (resp != ack) printf(Expecting ACK, got %i\n,resp);
// Send EOT
n = write(fd,eot,1);
if (n != 1) {printf(Failed to write EOT.\n); return(-1);}
// Close the port
n = close(fd);
if (n != 0)
{
printf(failed to close port: close returned %d\n,n);
return(-1);
}
return 0;
}
void set_port(int fd)
{
struct termios options;
int status;
// Get current settings for the port
tcgetattr(fd, options);
// Set baud rate = 1200
cfsetispeed(options, B1200);
cfsetospeed(options, B1200);
// Set 7 bits, even parity
options.c_cflag |= PARENB;
options.c_cflag = ~PARODD;
options.c_cflag = ~CSTOPB;
options.c_cflag = ~CSIZE;
options.c_cflag |= CS7;
// Raw input
options.c_lflag = ~(ICANON | ECHO | ECHOE | ISIG);
// Check and strip parity bit.
options.c_iflag |= (INPCK | ISTRIP);
// Disable software flow control
options.c_iflag = ~(IXON | IXOFF | IXANY);
// Output to be raw
options.c_oflag = ~(OPOST | OLCUC | ONLCR | OCRNL );
// Set new options for port
status = tcsetattr(fd, TCSANOW, options);
if (status 0)
{
errx(1,set_port(): failed.);
}
}
int open_port(void)
{
int fd;
fd = open(/dev/ttyU0, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd 0)
{
errx(1,open_port: Unable to open /dev/ttyS0.);
}
else
{
fcntl(fd, F_SETFL, 0);
}
return (fd);
}
dmesg from ALIX:
OpenBSD 4.6 (GENERIC) #0: Thu Apr 8 14:17:46 BST 2010
r...@alix:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Geode(TM) Integrated Processor by AMD PCS (AuthenticAMD
586-class) 499 MHz
cpu0: FPU,DE,PSE,TSC,MSR,CX8,SEP,PGE,CMOV,CFLUSH,MMX
real mem =
Re: Forking and catching SIGCHLD, si_pid always contains 0.
El 01/05/2010 18:14, Otto Moerbeek escribis:
On Sat, May 01, 2010 at 03:59:07PM +0200, Jesus Sanchez wrote:
Hi, using 4.6 release.
I'm doing some code on process forking and catching signals on
OpenBSD. My interest here is to catch the SIGCHLD signal and do things
with the pid which sended the signal on the function called to treat it.
As said in Advanced Programming in the Unix Environment book, when
calling a sigaction function there is a siginfo_t * with data about the
process sending the signal. On this struct, the member int si_pid
contains the PID of the process sending the signal. I tried in a very
simple code to obtain the PID of the child process but si_pid member
always contains 0 when I print it, and don't know what's wrong with it.
I included a very simple source code to try this with the mail, what
I'm missing?
On OpenBSD, only a few fields are filled for a few signals. Use any of
the wait(2) functions to get your info.
well thats a relief, i thought that I was screwing up something.
It's in some kind of TODO list or the OpenBSD project isn't
interested in implement such a things.
Thanks a lot for your answer
-J
-Otto
Google didn't helped at all.
Thanks for your time.
-J
#includesignal.h
#includestdio.h
#includestdlib.h
#includesys/types.h
#includesys/wait.h
#includeunistd.h
/* this func is called when SIGCHLD is received */
void mysigaction(int nsig, siginfo_t * info , void *nothing){
/* print some info values */
printf(info-si_pid: %d info-si_code: %d info-si_status: %d --\n,
info-si_pid , (*info). si_code, (*info).si_status);
printf(nsig: %d\n,nsig);
return ;
}
int main(){
struct sigaction myaction;
myaction.sa_sigaction=mysigaction;
myaction.sa_flags=SA_SIGINFO ;
/* use sa_sigaction instead sa_handler to
* have siginfo_t * values */
sigaction(SIGCHLD,myaction,(void*)NULL);
int pid=fork();
if (pid 0 ) { // father
printf(father, child pid is: %d\n,pid);
wait(NULL);
}
if (pid == 0){ // son
printf(son, getpid() returns: %d\n,getpid());
exit(0);
}
return 0;
}
/usr directory: a system or user place?
Hi list, Not no off-topic, but a little unix history oriented question. In hier(7) OpenBSD describe /usr as Contains the majority of user utilities and applications. In http://www.usna.edu/Users/cs/delooze/teaching/IC221/Lectures/LN02/class02.html they say that /usr Stands for Unix System Resources. Contains system utilities. In wikipedia they say /usr is *Secondary hierarchy* for read-only user data; contains the majority of (multi-http://en.wikipedia.org/wiki/Multi-user)user utilities and applications http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard So my doubt is: Is usr an abbreviation of user? If that is so (as as hier(7) can be understood), why /usr contains mainly system resources and not user resources? In fact only root has w permission inside /usr, so it seems more a system directory. I know that a system directory contains resources for the user, but, just for curiosity, what is the origin of this directory name? A user place o a unix system place? Thanks. Harrell
Re: Forking and catching SIGCHLD, si_pid always contains 0.
On Sat, May 1, 2010 at 9:59 AM, Jesus Sanchez zexe...@gmail.com wrote: As said in Advanced Programming in the Unix Environment book, when calling a sigaction function there is a siginfo_t * with data about the process sending the signal. On this struct, the member int si_pid contains the PID of the process sending the signal. I tried in a very simple code to obtain the PID of the child process but si_pid member always contains 0 when I print it, and don't know what's wrong with it. The si_pid is not generally reliable, so it's a good idea not to use it. What happens if two processes send the same signal before you receive it?
Re: Forking and catching SIGCHLD, si_pid always contains 0.
On Sat, May 1, 2010 at 2:01 PM, Ted Unangst ted.unan...@gmail.com wrote: On Sat, May 1, 2010 at 9:59 AM, Jesus Sanchez zexe...@gmail.com wrote: As said in Advanced Programming in the Unix Environment book, when calling a sigaction function there is a siginfo_t * with data about the process sending the signal. On this struct, the member int si_pid contains the PID of the process sending the signal. I tried in a very simple code to obtain the PID of the child process but si_pid member always contains 0 when I print it, and don't know what's wrong with it. The si_pid is not generally reliable, so it's a good idea not to use it. What happens if two processes send the same signal before you receive it? Sure, but it can be reliable for the SIGCHLD generated when a process exits, as the kernel has to keep track of the zombies anyway. This is on my todo list, but it seems to keep getting pushed down by other things... Philip Guenther
Re: /usr directory: a system or user place?
On 05/01/10 15:52, Harrell wrote: Hi list, Not no off-topic, but a little unix history oriented question. In hier(7) OpenBSD describe /usr as Contains the majority of user utilities and applications. In http://www.usna.edu/Users/cs/delooze/teaching/IC221/Lectures/LN02/class02.html they say that /usr Stands for Unix System Resources. Contains system utilities. In wikipedia they say /usr is *Secondary hierarchy* for read-only user data; contains the majority of (multi-http://en.wikipedia.org/wiki/Multi-user)user utilities and applications http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard So my doubt is: Is usr an abbreviation of user? If that is so (as as hier(7) can be understood), why /usr contains mainly system resources and not user resources? In fact only root has w permission inside /usr, so it seems more a system directory. I know that a system directory contains resources for the user, but, just for curiosity, what is the origin of this directory name? A user place o a unix system place? Thanks. Harrell When you boot into single user mode, what is available? / which includes /bin /sbin /etc /dev This includes all the basic system utilities. If you want fancier stuff, you need to mount /usr /home /var etc
Re: /usr directory: a system or user place?
On Sat, 1 May 2010 22:52:54 +0200 Harrell elbibliotecarioci...@gmail.com wrote: Hi list, Not no off-topic, but a little unix history oriented question. In hier(7) OpenBSD describe /usr as Contains the majority of user utilities and applications. In http://www.usna.edu/Users/cs/delooze/teaching/IC221/Lectures/LN02/class02.html they say that /usr Stands for Unix System Resources. Contains system utilities. In wikipedia they say /usr is *Secondary hierarchy* for read-only user data; contains the majority of (multi-http://en.wikipedia.org/wiki/Multi-user)user utilities and applications http://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard So my doubt is: Is usr an abbreviation of user? If that is so (as as hier(7) can be understood), why /usr contains mainly system resources and not user resources? In fact only root has w permission inside /usr, so it seems more a system directory. I know that a system directory contains resources for the user, but, just for curiosity, what is the origin of this directory name? A user place o a unix system place? Thanks. Harrell In many situations knowing where a name comes from is really helpful, but in other situations, knowing where a name came from is completely misleading since over time, definitions change. The name of the /usr directory is the latter. At one point in time in the ancient past, the /usr directory is where user directories were once stored, but over time the usage of this directory changed. The claim of 'usr' being an abbreviation for Unix System Resources is a backronym, (i.e. an abbreviation created after the fact). jcr -- The OpenBSD Journal - http://www.undeadly.org
Re: /usr directory: a system or user place?
On Sat, May 01, 2010 at 10:52:54PM +0200, Harrell wrote: So my doubt is: Is usr an abbreviation of user? If that is so (as as Chapter 4 of Greg Lehey's Porting Unix Software http://www.lemis.com/grog/Documentation/PUS/ has the following to say about the /usr directory: This directory used to be the other file system on a UNIX machine. In the System V ABI it has lost most of its importance. The ABI states uses only for /usr/bin and /usr/share, and the name /usr has lost its original meaning: the ABI specifies /usr only as a location for system files that users may wish to access.
Re: /usr directory: a system or user place?
On Sat, May 01, 2010 at 10:52:54PM +0200, Harrell wrote: Is usr an abbreviation of user? ... just for curiosity, what is the origin of this directory name? Your question has already been answered, but in case you are looking for documentation, here's Dennis Ritchie (as in KR C)in the 1978 (July-August) Bell System Technical Journal, pp. 1953-4: It is common for the totality of user files to be too voluminous for a given device. It is then impossible for the directories of all users to be members of the same directory, say /usr. Instead they must be split into groups, say /usr1 and /usr2; And Steve Bourne (as in Bourne shell), same issue, p. 1981, referring to user fred setting the $PATH environment variable: PATH=:/usr/fred/bin:/bin:/usr/bin Finally, looking at our old 1984 SVR2 source distribution, it is evident that the Bell Labs guys preferred abbreviations to acronyms. The distributed root filesystem consisted of: bck bin etc dev lib stand tmp The /usr filesystem contained (in cpio format!): adm bin catman games include lib lost+found mail news preserve pub spool tmp Not until the top level of the source tape do we hit an acronym: cmd games head lib stand uts where uts=Unix Time-sharing System, which I guess is hard to abbreviate;) Yes, I know this is somewhat off-topic, but I think it's fascinating, like, Why'd they call it 'awk'? Now there's an acronym for you. Today, hier(7) rules. -- Barry
Re: /usr directory: a system or user place?
On Sat, 1 May 2010 20:23:50 -0400, Barry Miller wrote: Yes, I know this is somewhat off-topic, but I think it's fascinating, like, Why'd they call it 'awk'? Now there's an acronym for you. Did you leave that as an exercise for the reader ? It's too easy and, although I'm not spoiling the exercise, I'll bet somebody jumps in very soon! *** NOTE *** Please DO NOT CC me. I am subscribed to the list. Mail to the sender address that does not originate at the list server is tarpitted. The reply-to: address is provided for those who feel compelled to reply off list. Thankyou. Rod/ --- This life is not the real thing. It is not even in Beta. If it was, then OpenBSD would already have a man page for it.
Re: /usr directory: a system or user place?
On Sun, May 02, 2010 at 11:18:01AM +1000, Rod Whitworth spoke thusly: On Sat, 1 May 2010 20:23:50 -0400, Barry Miller wrote: Yes, I know this is somewhat off-topic, but I think it's fascinating, like, Why'd they call it 'awk'? Now there's an acronym for you. Did you leave that as an exercise for the reader ? It's too easy and, although I'm not spoiling the exercise, I'll bet somebody jumps in very soon! Kersplash! I'm in. ;) [A]ho + [W]einberger + [K]ernighan = AWK Possible alternative definitions: Awesome Word Kinesis Awfully Weird Kool-Aid *** NOTE *** Please DO NOT CC me. I am subscribed to the list. Mail to the sender address that does not originate at the list server is tarpitted. The reply-to: address is provided for those who feel compelled to reply off list. Thankyou. Rod/ --- This life is not the real thing. It is not even in Beta. If it was, then OpenBSD would already have a man page for it. -- \\\ /// ( @ @ ) +-oOOo-(_)-oOOo-+ === Denny White - denny...@cableone.net GnuPG key : 0x1644E79A | http://wwwkeys.de.pgp.net Fingerprint: D0A9 AD44 1F10 E09E 0E67 EC25 CB44 F2E5 1644 E79A === () ASCII ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments ===
Escenas Temidas del Terapeuta Familiar
Responder a: i...@escuelasistemica.com.ar [IMAGE] Taller Vivencial ESCENAS TEMIDAS DEL TERAPEUTA FAMILIAR El objetivo fundamental es poder ampliar el sentido de la escena, cristalizado en la historia del terapeuta Coordinador: Dr. Horacio SEREBRINSKY [IMAGE] Dirigido a:Trabajadores de la salud mental Propuesta: Se trabajara con el genograma de cada terapeuta, desde una sptica gestaltica y psicodramatica haciendo un recorrido sobre la historia del terapeuta en funcisn del trabajo clmnico con familias. Se trabajara sobre miedos, secretos inconfesables, duelos y vmnculos traumaticos, entre otros y la escena familiar. Objetivo: Este trabajo facilitara el poder despegarse de clisis personales y lograr un mejor rol profesional. Fecha y horario: Sabado 8 de mayo de 09 a 16hs CUPOS LIMITADOS - INSCRIPCISN PREVIA Informes e Inscripcisn: Fray J. S. M. de Oro 1843 (1414) - Te.Fax: 4774-2875/6112 4899-1053 i...@escuelasistemica.com.ar / www.escuelasistemica.com.ar [demime 1.01d removed an attachment of type image/jpeg which had a name of flia2.jpg]
