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setresgid fails for GID > 65535


On a local s390 (32-bit) system with glibc-2.2.5-233 and 2.4.21-266
kernel, setresgid() fails for users with gid > 65535. Replacing the
glibc-2.2 with glibc-2.3 helps.  Looking through the glibc code, it
seemed like glibc is supporting a 16-bit setresgid(). The problem does
not occur on x86.  man page of setresgid() mentions that the prototype
of setresgid() is not available in glibc-2.2 but is available in higher
versions (2.3).  Can anybody suggest on how we can make setresgid() work
for large gid's ( gid > 65535 ) on glibc-2.2.5-233, or how the changes
in glibc-2.3 can be backported to glibc-2.2 for setresgid() call. 

Thank you,   




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