lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 20 Mar 2014 15:09:25 +0530
From:	Janani Venkataraman <jananive@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	amwang@...hat.com, procps@...elists.org, rdunlap@...otime.net,
	james.hogan@...tec.com, aravinda@...ux.vnet.ibm.com, hch@....de,
	mhiramat@...hat.com, jeremy.fitzhardinge@...rix.com,
	xemul@...allels.com, d.hatayama@...fujitsu.com, coreutils@....org,
	kosaki.motohiro@...fujitsu.com, adobriyan@...il.com,
	util-linux@...r.kernel.org, tarundsk@...ux.vnet.ibm.com,
	vapier@...too.org, roland@...k.frob.com, ananth@...ux.vnet.ibm.com,
	gorcunov@...nvz.org, avagin@...nvz.org, oleg@...hat.com,
	eparis@...hat.com, suzuki@...ux.vnet.ibm.com, andi@...stfloor.org,
	tj@...nel.org, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org
Subject: [PATCH 03/33] Process Status

Fetch the process status from /proc/pid/stat as it will be required for the dump.

Signed-off-by: Suzuki K. Poulose <suzuki@...ibm.com>
Signed-off-by: Janani Venkataraman <jananive@...ux.vnet.ibm.com>
---
 src/Makefile.am |    2 +
 src/coredump.c  |    4 +++
 src/coredump.h  |   13 ++++++++
 src/proc.c      |   86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 104 insertions(+), 1 deletion(-)
 create mode 100644 src/coredump.h
 create mode 100644 src/proc.c

diff --git a/src/Makefile.am b/src/Makefile.am
index f7b25fa..9e5d3c0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,5 +3,5 @@ HAVE_SYSTEMD_SOCKET_SUPPORT = 0
 CFLAGS += -I. -DHAVE_SYSTEMD_SOCKET_SUPPORT='$(HAVE_SYSTEMD_SOCKET_SUPPORT)'
 
 bin_PROGRAMS = gencore
-gencore_SOURCES = coredump.c
+gencore_SOURCES = coredump.c proc.c
 
diff --git a/src/coredump.c b/src/coredump.c
index 7a7fe11..ad9ee7d 100644
--- a/src/coredump.c
+++ b/src/coredump.c
@@ -26,10 +26,14 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <coredump.h>
 
 /* For logging all the messages */
 FILE *fp_log;
 
+/* Status of the dump */
+int status;
+
 /* Logging messages */
 void gencore_log(char *fmt, ...)
 {
diff --git a/src/coredump.h b/src/coredump.h
new file mode 100644
index 0000000..cc77197
--- /dev/null
+++ b/src/coredump.h
@@ -0,0 +1,13 @@
+#define COMM_LEN 17            /* Maximum length of command line */
+#define NUM_STAT_FEILDS 30     /* Number of fields read from /proc/pid/stat */
+
+/* Status of the dump */
+extern int status;
+
+/* Structure for Status of process */
+struct pid_stat {
+	int ps_pid;
+	char ps_comm[COMM_LEN];
+	char ps_state;
+	unsigned long long ps_num[NUM_STAT_FEILDS];
+};
diff --git a/src/proc.c b/src/proc.c
new file mode 100644
index 0000000..6c9e804
--- /dev/null
+++ b/src/proc.c
@@ -0,0 +1,86 @@
+/*
+ * /proc/ helper routines for gencore
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2013
+ *
+ * Authors:
+ *      Janani Venkataraman <jananve@...ibm.com>
+ *      Suzuki K. Poulose <suzuki@...ibm.com>
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <coredump.h>
+
+/* Get Process Stats */
+int get_pid_stat(int pid, struct pid_stat *ps)
+{
+	int ret = -1, i;
+	char junk;
+	char filename[40];
+	FILE *fin;
+
+	snprintf(filename, 40, "/proc/%d/stat", pid);
+	fin = fopen(filename, "r");
+	if (fin == NULL) {
+		status = errno;
+		gencore_log("Failure while fetching thread status from %s.\n",
+								filename);
+		return -1;
+	}
+
+	/* Read pid */
+	fscanf(fin, "%d", &ps->ps_pid);
+
+	/* Skip till '(' */
+	while (fscanf(fin, "%c", &junk) != EOF && junk != '(');
+	if (junk != '(')  {
+		status = errno;
+		gencore_log("Failure while fetching thread status from %s.\n",
+								filename);
+		goto err;
+	}
+
+	/* Read Command Line */
+	fscanf(fin, "%[^)]", ps->ps_comm);
+
+	/* Skip the ')' */
+	while (fscanf(fin, "%c", &junk) != EOF && junk != ')');
+	if (junk != ')')  {
+		status = errno;
+		gencore_log("Failure while fetching thread status from %s.\n",
+								filename);
+		goto err;
+	}
+
+	/* Reading the space */
+	fscanf(fin, "%c", &junk);
+
+	/* State */
+	fscanf(fin, "%c", &ps->ps_state);
+
+	/* Read the rest of the fields */
+	for (i = 0; i < NUM_STAT_FEILDS &&
+			(fscanf(fin, "%lld", &ps->ps_num[i]) != EOF); i++);
+
+	if (i == NUM_STAT_FEILDS)
+		ret = 0;
+
+err:
+	fclose(fin);
+	return ret;
+}

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists