Fetch the process status from /proc/pid/stat as it will be required for the dump.
Signed-off-by: Suzuki K. Poulose <[email protected]> Signed-off-by: Janani Venkataraman <[email protected]> --- 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 <[email protected]> + * Suzuki K. Poulose <[email protected]> + */ + +#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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
