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Operating Systems Linux How to call a proc file from *.c program? Post 98943 by cbkihong on Monday 13th of February 2006 08:05:25 AM
Old 02-13-2006
I'm pretty sure you just read() it.

One way to see how other programs does it.

Run strace on a program which is known to access /proc. The system calls involved will be logged. Inside you will find calls to read from the proc filesystem.
 

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tapset::nfs_proc(3stap) 												   tapset::nfs_proc(3stap)

NAME
tapset::nfs_proc - systemtap nfs_proc tapset DESCRIPTION
nfs.proc.lookup NFS client opens/searches a file on server See probe::nfs.proc.lookup(3stap) for details. nfs.proc.read NFS client synchronously reads file from server See probe::nfs.proc.read(3stap) for details. nfs.proc.write NFS client synchronously writes file to server See probe::nfs.proc.write(3stap) for details. nfs.proc.commit NFS client committing data on server See probe::nfs.proc.commit(3stap) for details. nfs.proc.read_setup NFS client setting up a read RPC task See probe::nfs.proc.read_setup(3stap) for details. nfs.proc.read_done NFS client response to a read RPC task See probe::nfs.proc.read_done(3stap) for details. nfs.proc.write_setup NFS client setting up a write RPC task See probe::nfs.proc.write_setup(3stap) for details. nfs.proc.write_done NFS client response to a write RPC task See probe::nfs.proc.write_done(3stap) for details. nfs.proc.commit_setup NFS client setting up a commit RPC task See probe::nfs.proc.commit_setup(3stap) for details. nfs.proc.commit_done NFS client response to a commit RPC task See probe::nfs.proc.commit_done(3stap) for details. nfs.proc.open NFS client allocates file read/write context information See probe::nfs.proc.open(3stap) for details. nfs.proc.release NFS client releases file read/write context information See probe::nfs.proc.release(3stap) for details. nfs.proc.handle_exception NFS client handling an NFSv4 exception See probe::nfs.proc.handle_exception(3stap) for details. nfs.proc.create NFS client creating file on server See probe::nfs.proc.create(3stap) for details. nfs.proc.remove NFS client removes a file on server See probe::nfs.proc.remove(3stap) for details. nfs.proc.rename NFS client renames a file on server See probe::nfs.proc.rename(3stap) for details. SEE ALSO
probe::nfs.proc.lookup(3stap), probe::nfs.proc.read(3stap), probe::nfs.proc.write(3stap), probe::nfs.proc.commit(3stap), probe::nfs.proc.read_setup(3stap), probe::nfs.proc.read_done(3stap), probe::nfs.proc.write_setup(3stap), probe::nfs.proc.write_done(3stap), probe::nfs.proc.commit_setup(3stap), probe::nfs.proc.commit_done(3stap), probe::nfs.proc.open(3stap), probe::nfs.proc.release(3stap), probe::nfs.proc.handle_exception(3stap), probe::nfs.proc.create(3stap), probe::nfs.proc.remove(3stap), probe::nfs.proc.rename(3stap), stap(1), stapprobes(3stap) IBM
--- tapset::nfs_proc(3stap)
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