.\" .\" This file and its contents are supplied under the terms of the .\" Common Development and Distribution License ("CDDL"), version 1.0. .\" You may only use this file in accordance with the terms of version .\" 1.0 of the CDDL. .\" .\" A full copy of the text of the CDDL should have accompanied this .\" source. A copy of the CDDL is also available via the Internet at .\" http://www.illumos.org/license/CDDL. .\" .\" .\" Copyright 2015 Joyent, Inc. .\" .Dd May 11, 2016 .Dt PGRAB_CORE 3PROC .Os .Sh NAME .Nm Pgrab_core , .Nm Pfgrab_core .Nd grab a core file .Sh LIBRARY .Lb libproc .Sh SYNOPSIS .In libproc.h .Ft "struct ps_prochandle *" .Fo Pgrab_core .Fa "const char *core" .Fa "const char *aout" .Fa "int gflag" .Fa "int *perr" .Fc .Ft "struct ps_prochandle *" .Fo Pfgrab_core .Fa "int core_fd" .Fa "const char *aout" .Fa "int *perr" .Fc .Sh DESCRIPTION The .Fn Pgrab_core and .Fn Pfgrab_core functions open a core file for introspection. Unlike live processes, core files cannot have their state modified; however, all of the functions that iterate or query state will work. These functions work on all illumos core files and the core files of some other operating systems. See both .Xr core 4 and the .Em Core Files section of .Xr libproc 3LIB for more information. .Pp The .Fn Pgrab_core function attempts to open the core file specified by .Fa core . The system attempts to determine the path of the original executable. The argument .Fa aout may either be the path to that file, a path to a directory to search, or the .Dv NULL pointer, if neither is known. The system will search for it and will supplement information in the core file with that. .Pp The .Fa gflag argument to the .Fn Pgrab_core function controls how the file is opened. If the .Dv PGRAB_RDONLY flag is specified, then the core file will be opened with the .Xr open 2 flag .Dv O_RDONLY . Otherwise, it will be opened .Dv O_RDWR . .Pp The .Fa perr argument must be a .Pf non- Dv NULL pointer which will store a more detailed error in the event that the .Fn Pgrab_core function fails. A human-readable form of the error can be obtained through the routine .Xr Pgrab_error 3PROC . .Pp The .Fn Pfgrab_core is similar to the .Fn Pgrab_core function. Except, instead of operating on a path, it opens a handle to the core file referenced by .Fa core_fd . The .Fa aout and .Fa perr arguments are identical to those in the .Fn Pgrab_core function. .Pp The handle returned, from either function, is valid until it is closed with .Xr Prelease 3PROC or .Xr Pfree 3PROC . .Sh RETURN VALUES Upon successful completion, the .Fn Pgrab_core and .Fn Pfgrab_core functions return a .Sy libproc handle to the core file. Otherwise, .Dv NULL is returned and .Fa perr is filled in with a more detailed error message. .Sh ERRORS The .Fn Pgrab_core function will fail if: .Bl -tag -width Er .It Er G_NOCORE The file .Fa core does not exist. .It Er G_STRANGE An unexpected system error occurred while trying to open .Fa core . The value of .Sy errno indicates the system failure. .El .Pp The .Fn Pgrab_core and .Fn Pfgrab_core functions will fail if: .Bl -tag -width Er .It Dv G_ELF An unexpected .Xr libelf 3LIB failure occurred. .It Dv G_FORMAT The core file referred to by either .Fa core or .Fa core_fd is not a valid ELF core file. .It Dv G_ISAINVAL The architecture of the core file referred to by either .Fa core or .Fa core_fd does not match the current running system. .It Dv G_LP64 The calling process is a 32-bit process and the core file referenced by either .Fa core or .Fa core_fd refers to a 64-bit process. .It Dv G_NOTE The ELF notes present in the core file referred to by either .Fa core or .Fa core_fd are corrupt or missing required data. .It Dv G_STRANGE An unanticipated system error occurred while trying to open the core file and create the handle. The value of .Sy errno indicates the system failure. .El .Sh INTERFACE STABILITY .Sy Uncommitted .Sh MT-LEVEL .Sy MT-Safe .Sh SEE ALSO .Xr gcore 1 , .Xr open 2 , .Xr errno 3C , .Xr libproc 3LIB , .Xr Pfree 3PROC , .Xr Pgrab_error 3PROC , .Xr Prelease 3PROC , .Xr core 4