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IDS Forum

basename C function on HPUX IDS misbehaving

Date: Monday, 17 December 2007, at 1:20 p.m.


I am having a problem with migrating some esql code from Informix 10 to Informix 11.10FC1. The OS is HPUX 11i.
The code does a lot of file handling tasks & uses the basename function which is in the libgen library. However when rebuilt on 11, this function is behaving strangely. The function takes a string which is the full pathname of a file, & removes the leading directories to leave you with just the file name.
When I rebuild programs containing basename under Informix 11, the function does what it is supposed to - returns the filename - but it also actually removes the leading directories from parameter too.

I enclose a test program I made which hopefully explains it.

#include <stdio.h>
#include <libgen.h>
$include sqlca;
$include sqltypes;

int main(argc,argv)

int argc;
char *argv[];


char buff1[100];

char buff2[100];

strcpy(buff1, "/full/path/filename");

printf("Before basename Buff1:%s\n", buff1);

printf("Before basename Buff2:%s\n", buff2);

strcpy(buff2, basename(buff1));

printf("After basename buff1:%s\n", buff1);

printf("After basename buff2:%s\n", buff2);


When I build this under Informix 11 it gets built with the following arguments:

/usr/informix11/bin/esql -e - -g -DTRACEON -DAUDITON -Ae +DA2.0W +z -I/usr/informix11/incl/esql -I/syssoft/dev/CORE/Include -I/syssoft/dev/BOS/Include -I/usr/xdposm/xdpos/incl -I/GEMSLIVE/ISV/bose/test/src/include -c

/bin/cc - -g -DTRACEON -DAUDITON -Ae +DA2.0W +z -I/usr/informix11/incl/esql -I/syssoft/dev/CORE/Include -I/syssoft/dev/BOS/Include -I/usr/xdposm/xdpos/incl -I/GEMSLIVE/ISV/bose/test/src/include -c bntest.c

/usr/informix11/bin/esql -o bntest bntest.o +DA2.0W -Wl,+s -L /usr/informix11/lib/esql -L /dev/Lib -L /syssoft/dev/Lib -L /usr/xdposm/xdpos/lib -limage -ltrace -lranda -lgemscommutil -leSQLisv

The output of the program when I run it is:

Before basename Buff1:/full/path/filename
Before basename Buff2:
After basename buff1:filename
After basename buff2:filename

N.B Buff1 has also lost the leading directories which is wrong!!

If I export my INFORMIXDIR to be /usr/informix10 & rebuild with:

/usr/informix10/bin/esql -e - -g -DTRACEON -DAUDITON -Ae +DA2.0W +z -I/usr/informix10/incl/esql -I/syssoft/dev/CORE/Include -I/syssoft/dev/BOS/Include -I/usr/xdposm/xdpos/incl -I/GEMSLIVE/ISV/bose/test/src/include -c

/bin/cc - -g -DTRACEON -DAUDITON -Ae +DA2.0W +z -I/usr/informix10/incl/esql -I/syssoft/dev/CORE/Include -I/syssoft/dev/BOS/Include -I/usr/xdposm/xdpos/incl -I/GEMSLIVE/ISV/bose/test/src/include -c bntest.c

/usr/informix10/bin/esql -o bntest bntest.o +DA2.0W -Wl,+s -L /usr/informix10/lib/esql -L /dev/Lib -L /syssoft/dev/Lib -L /usr/xdposm/xdpos/lib -limage -ltrace -lranda -lgemscommutil -leSQLisv

and then run it again I get:
Before basename Buff1:/full/path/filename
Before basename Buff2:
After basename buff1:/full/path/filename
After basename buff2:filename

N.B that buff1 never changed under the informix10 build - correct behaviour.
Does any one have any ideas?



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