On 04/25/2016 09:30 PM, Andi Kleen wrote:
> Does that really work? When the executable is found in $PATH
> av[0] does not contain the full path name. But you seem to assume
> it does?
>
> -Andi
Hi.
Well, it should be resolved by lrealpath. There's usage from my machine:
marxin@marxinbox:~> which nm
/home/marxin/bin/gcc2/bin/nm
marxin@marxinbox:~> strace -f -s512 nm /tmp/a.o 2>&1 | grep exec
execve("/home/marxin/bin/gcc2/bin/nm", ["nm", "/tmp/a.o"], [/* 97 vars */]) = 0
[pid 5288] execve("/home/marxin/bin/gcc2/bin/nm",
["/home/marxin/bin/gcc2/bin/nm", "--plugin",
"/home/marxin/bin/gcc2/lib/gcc/x86_64-pc-linux-gnu/7.0.0/liblto_plugin.so",
"/tmp/a.o"], [/* 97 vars */] <unfinished ...>
[pid 5288] <... execve resumed> ) = 0
[pid 5289] execve("/usr/bin/nm", ["/usr/bin/nm", "--plugin",
"/home/marxin/bin/gcc2/lib/gcc/x86_64-pc-linux-gnu/7.0.0/liblto_plugin.so",
"--plugin",
"/home/marxin/bin/gcc2/lib/gcc/x86_64-pc-linux-gnu/7.0.0/liblto_plugin.so",
"/tmp/a.o"], [/* 97 vars */] <unfinished ...>
[pid 5289] <... execve resumed> ) = 0
marxin@marxinbox:~> l /home/marxin/bin/gcc2/bin/ | grep nm
-rwxr-xr-x 2 marxin users 141880 Apr 26 09:53 gcc-nm*
lrwxrwxrwx 1 marxin users 6 Apr 26 09:31 nm -> gcc-nm*
Martin
