outline

1 files changed, 321 insertions, 0 deletions

diff --git a/ipcs.c b/ipcs.c
new file mode 100644
index 0000000..73a2cc2
--- /dev/null
+++ b/ipcs.c
@@ -0,0 +1,321 @@
+/*
+ * UNG's Not GNU
+ *
+ * Copyright (c) 2020, Jakob Kaivo <jkk@ung.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define _XOPEN_SOURCE 700
+#include <errno.h>
+#include <locale.h>
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
+#include <sys/sem.h>
+#include <sys/shm.h>
+#include <time.h>
+#include <unistd.h>
+
+enum {
+	TYPE_WIDTH = 1,
+	ID_WIDTH = 10,
+	KEY_WIDTH = (sizeof(key_t) * 2),
+	MODE_WIDTH = 11,
+	OWNER_WIDTH = 8,
+	GROUP_WIDTH = 8,
+	CREATOR_WIDTH = OWNER_WIDTH,
+	CGROUP_WIDTH = GROUP_WIDTH,
+	CBYTES_WIDTH = 10,
+	QNUM_WIDTH = 5,
+	QBYTES_WIDTH = 10,
+	LSPID_WIDTH = 7,
+	LRPID_WIDTH = 7,
+	STIME_WIDTH = 9,
+	RTIME_WIDTH = 9,
+	NATTCH_WIDTH = 8,
+	SEGSZ_WIDTH = 6,
+	CPID_WIDTH = 7,
+	LPID_WIDTH = 7,
+	ATIME_WIDTH = 9,
+	DTIME_WIDTH = 9,
+	NSEMS_WIDTH = 6,
+	OTIME_WIDTH = 9,
+	CTIME_WIDTH = 9,
+};
+
+enum {
+	MSG = 'q',
+	SHM = 'm',
+	SEM = 's',
+};
+
+enum {
+	BYTES = (1<<0),
+	CREATOR = (1<<1),
+	OUTSTANDING = (1<<2),
+	PROCESS = (1<<3),
+	TIME = (1<<4),
+};
+
+struct ipc {
+	struct ipc *next;
+	struct ipc *prev;
+
+	/* always */
+	char type;
+	int id;
+	unsigned int key;
+	char mode[11];
+	uid_t owner;
+	gid_t group;
+
+	/* CREATOR */
+	uid_t creator;
+	gid_t cgroup;
+
+	/* OUTSTANDING */
+	int cbytes;	/* MSG */
+	int qnum;	/* MSG */
+	int natcch;	/* SHM */
+
+	/* BYTES */
+	int qbytes;	/* MSG */
+	int segsz;	/* SHM */
+	int nsems;	/* SEM */
+
+	/* PROCESS */
+	pid_t lspid;	/* MSG */
+	pid_t lrpid;	/* MSG */
+	pid_t cpid;	/* SHM */
+	pid_t lpid;	/* SHM */
+
+	/* TIME */
+	time_t stime;	/* MSG */
+	time_t rtime;	/* MSG */
+	time_t atime;	/* SHM */
+	time_t dtime;	/* SHM */
+	time_t otime;	/* SEM */
+	time_t ctime;
+};
+
+static void print_header(void)
+{
+	time_t t = time(NULL);
+	struct tm *tm = localtime(&t);
+	char date[128];
+	strftime(date, sizeof(date), "%a %b %e %H:%M:%S %Z %Y", tm);
+	printf("IPC status from %s as of %s\n", "<source>", date); /* FIXME */
+}
+
+static void print_user(int width, uid_t uid)
+{
+	printf(" %-*d", width, uid);
+}
+
+static void print_group(int width, gid_t gid)
+{
+	printf(" %-*d", width, gid);
+}
+
+static void print_record(char type, int opts, struct ipc *entry)
+{
+	printf("%-*c", TYPE_WIDTH, entry->type);
+	printf(" %-*d", ID_WIDTH, entry->id);
+	printf(" 0x%0*x", KEY_WIDTH - 2, entry->key);
+	printf(" %-*s", MODE_WIDTH, entry->mode);
+	print_user(OWNER_WIDTH, entry->owner);
+	print_group(GROUP_WIDTH, entry->group);
+
+	printf("\n");
+}
+
+static void print_report(char type, int opts, struct ipc *list)
+{
+	char *facility = NULL;
+	
+	if (type == MSG) {
+		facility = "Message Queues";
+	} else if (type == SHM) {
+		facility = "Shared Memory";
+	} else if (type == SEM) {
+		facility = "Semaphores";
+	}
+
+	if (list == NULL) {
+		printf("%s facility not in system.\n", facility);
+		return;
+	}
+
+	printf("%s:\n", facility);
+
+	printf("%-*c", TYPE_WIDTH, 'T');
+	printf(" %-*s", ID_WIDTH, "ID");
+	printf(" %-*s", KEY_WIDTH, "KEY");
+	printf(" %-*s", MODE_WIDTH, "MODE");
+	printf(" %-*s", OWNER_WIDTH, "OWNER");
+	printf(" %-*s", GROUP_WIDTH, "GROUP");
+
+	if (opts & CREATOR) {
+		printf(" %-*s", CREATOR_WIDTH, "CREATOR");
+		printf(" %-*s", CGROUP_WIDTH, "CGROUP");
+	}
+
+	if (opts & OUTSTANDING) {
+		if (type == MSG) {
+			printf(" %-*s", CBYTES_WIDTH, "CBYTES");
+			printf(" %-*s", QNUM_WIDTH, "QNUM");
+		} else if (type == SHM) {
+			printf(" %-*s", NATTCH_WIDTH, "NATTCH");
+		}
+	}
+
+	if (opts & BYTES) {
+		if (type == MSG) {
+			printf(" %-*s", QBYTES_WIDTH, "QBYTES");
+		} else if (type == SHM) {
+			printf(" %-*s", SEGSZ_WIDTH, "SEGSZ");
+		} else if (type == SEM) {
+			printf(" %-*s", NSEMS_WIDTH, "NSEMS");
+		}
+	}
+
+	if (opts & PROCESS) {
+		if (type == MSG) {
+			printf(" %-*s", LSPID_WIDTH, "LSPID");
+			printf(" %-*s", LRPID_WIDTH, "LRPID");
+		} else if (type == SHM) {
+			printf(" %-*s", CPID_WIDTH, "CPID");
+			printf(" %-*s", LPID_WIDTH, "LPID");
+		}
+	}
+
+	if (opts & TIME) {
+		if (type == MSG) {
+			printf(" %-*s", STIME_WIDTH, "STIME");
+			printf(" %-*s", RTIME_WIDTH, "RTIME");
+		} else if (type == SHM) {
+			printf(" %-*s", ATIME_WIDTH, "ATIME");
+			printf(" %-*s", DTIME_WIDTH, "DTIME");
+		} else if (type == SEM) {
+			printf(" %-*s", OTIME_WIDTH, "OTIME");
+		}
+
+		printf(" %-*s", CTIME_WIDTH, "CTIME");
+	}
+
+	printf("\n");
+
+	while (list) {
+		print_record(type, opts, list);
+		list = list->next;
+	}
+}
+
+static struct ipc *ipcs(char type)
+{
+	struct ipc *r = calloc(1, sizeof(*r));
+	r->type = type;
+	memset(r->mode, '-', sizeof(r->mode));
+
+	return r;
+}
+
+int main(int argc, char *argv[])
+{
+	setlocale(LC_ALL, "");
+
+	int c;
+	int msgs = 0;
+	int shms = 0;
+	int sems = 0;
+	unsigned int print = 0;
+
+	while ((c = getopt(argc, argv, "qmsabcopt")) != -1) {
+		switch(c) {
+		case 'q':
+			msgs = 1;
+			break;
+
+		case 'm':
+			shms = 1;
+			break;
+
+		case 's':
+			sems = 1;
+			break;
+
+		case 'a':
+			print = BYTES | CREATOR | OUTSTANDING | PROCESS | TIME;
+			break;
+
+		case 'b':
+			print |= BYTES;
+			break;
+
+		case 'c':
+			print |= CREATOR;
+			break;
+
+		case 'o':
+			print |= OUTSTANDING;
+			break;
+
+		case 'p':
+			print |= PROCESS;
+			break;
+
+		case 't':
+			print |= TIME;
+			break;
+
+		default:
+			return 1;
+		}
+	}
+
+	if (msgs == 0 && shms == 0 && sems == 0) {
+		msgs = 1;
+		shms = 1;
+		sems = 1;
+	}
+
+	struct ipc *msglist = msgs ? ipcs(MSG) : NULL;
+	struct ipc *shmlist = shms ? ipcs(SHM) : NULL;
+	struct ipc *semlist = sems ? ipcs(SEM) : NULL;
+
+	print_header();
+
+	if (msgs) {
+		print_report(MSG, print, msglist);
+	}
+
+	if (shms) {
+		print_report(SHM, print, shmlist);
+	}
+
+	if (sems) {
+		print_report(SEM, print, semlist);
+	}
+
+	return 0;
+}