PWRITE(3PROC) Process Control Library Functions PWRITE(3PROC)
Pwrite - write data to the address space of a process
Process Control Library (libproc, -lproc)
#include <libproc.h>
ssize_t
Pwrite(struct ps_prochandle *P, const void *buf, size_t nbyte,
uintptr_t address);
The Pwrite() function writes data from buf to the process handle P
starting at the address address. It writes at most nbyte of data. The
Pwrite() function is logically analogous to the pwrite(2) function.
For live processes, this function is equivalent to writing to the /proc
file system as file for the process. For core files, it writes to the
logical address space of what was once the process and not the
corresponding offset in the on-disk file. ELF objects grabbed through
Pgrab_file(3PROC) do not support being written to.
The Pwrite() function cannot be used to extend the size of a mapping;
writing to an unmapped region generates an error.
Upon successful completion, the Pwrite() function returns the number of
bytes successfully written to P. This number is never greater than
nbyte. Otherwise, it returns -1 and errno is set to indicate an error.
For the full list of errors see the DIAGNOSTICS section in proc(5) and
the ERRORS section in pwrite(2).
In addition, the Pwrite() function will fail if:
EIO P refers to an ELF object and not a core file or
active process.
Uncommitted
MT-LEVEL
See LOCKING in libproc(3LIB).
pwrite(2), libproc(3LIB), proc(5)
illumos May 11, 2016 illumos
NAME
Pwrite - write data to the address space of a process
LIBRARY
Process Control Library (libproc, -lproc)
SYNOPSIS
#include <libproc.h>
ssize_t
Pwrite(struct ps_prochandle *P, const void *buf, size_t nbyte,
uintptr_t address);
DESCRIPTION
The Pwrite() function writes data from buf to the process handle P
starting at the address address. It writes at most nbyte of data. The
Pwrite() function is logically analogous to the pwrite(2) function.
For live processes, this function is equivalent to writing to the /proc
file system as file for the process. For core files, it writes to the
logical address space of what was once the process and not the
corresponding offset in the on-disk file. ELF objects grabbed through
Pgrab_file(3PROC) do not support being written to.
The Pwrite() function cannot be used to extend the size of a mapping;
writing to an unmapped region generates an error.
RETURN VALUES
Upon successful completion, the Pwrite() function returns the number of
bytes successfully written to P. This number is never greater than
nbyte. Otherwise, it returns -1 and errno is set to indicate an error.
For the full list of errors see the DIAGNOSTICS section in proc(5) and
the ERRORS section in pwrite(2).
In addition, the Pwrite() function will fail if:
EIO P refers to an ELF object and not a core file or
active process.
INTERFACE STABILITY
Uncommitted
MT-LEVEL
See LOCKING in libproc(3LIB).
SEE ALSO
pwrite(2), libproc(3LIB), proc(5)
illumos May 11, 2016 illumos