1520ee7083
1998-12-09 Martin Baulig <martin@home-of-linux.org> * include/glibtop/procargs.h (glibtop_get_proc_args): Make the return value a `char *' instead of a `const char *'.
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/xmalloc.h>
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#include <glibtop/procargs.h>
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static const unsigned long _glibtop_sysdeps_proc_args =
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(1 << GLIBTOP_PROC_ARGS_SIZE);
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/* Init function. */
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void
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glibtop_init_proc_args_s (glibtop *server)
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{
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server->sysdeps.proc_args = _glibtop_sysdeps_proc_args;
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}
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/* Provides detailed information about a process. */
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char *
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glibtop_get_proc_args_s (glibtop *server, glibtop_proc_args *buf,
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pid_t pid, unsigned max_len)
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{
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char fn [BUFSIZ], buffer [BUFSIZ];
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int cmdline, len, total = 0;
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char *retval = NULL;
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glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_ARGS, 0);
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memset (buf, 0, sizeof (glibtop_proc_args));
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sprintf (fn, "/proc/%d/cmdline", pid);
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cmdline = open (fn, O_RDONLY);
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if (cmdline < 0) return NULL;
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if (max_len) {
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retval = glibtop_malloc_r (server, max_len+1);
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len = read (cmdline, retval, max_len);
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if (len < 0) {
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glibtop_free_r (server, retval);
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return NULL;
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}
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return retval;
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}
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while (1) {
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len = read (cmdline, buffer, BUFSIZ-1);
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if (len < 0) {
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glibtop_free_r (server, retval);
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return NULL;
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}
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if (len == 0)
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break;
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retval = glibtop_realloc_r (server, retval, total+len+1);
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memcpy (retval+total, buffer, len);
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*(retval+total+len) = 0;
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total += len;
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}
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close (cmdline);
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buf->size = total;
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buf->flags = _glibtop_sysdeps_proc_args;
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return retval;
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}
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