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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
commitcfe5e3905201349e9cf3f95d52ff4bd100bde37d (patch)
treed0baf160cbee3195249d095f85e52d20c21acf02 /misc-utils/lsfd-fifo.c
parentInitial commit. (diff)
downloadutil-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.tar.xz
util-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.zip
Adding upstream version 2.39.3.upstream/2.39.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'misc-utils/lsfd-fifo.c')
-rw-r--r--misc-utils/lsfd-fifo.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/misc-utils/lsfd-fifo.c b/misc-utils/lsfd-fifo.c
new file mode 100644
index 0000000..f736192
--- /dev/null
+++ b/misc-utils/lsfd-fifo.c
@@ -0,0 +1,148 @@
+/*
+ * lsfd-fifo.c - handle associations opening fifo objects
+ *
+ * Copyright (C) 2021 Red Hat, Inc. All rights reserved.
+ * Written by Masatake YAMATO <yamato@redhat.com>
+ *
+ * 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 would 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
+ */
+
+#include "xalloc.h"
+#include "nls.h"
+#include "libsmartcols.h"
+
+#include "lsfd.h"
+
+struct fifo {
+ struct file file;
+ struct ipc_endpoint endpoint;
+};
+
+struct fifo_ipc {
+ struct ipc ipc;
+ ino_t ino;
+};
+
+static inline char *fifo_xstrendpoint(struct file *file)
+{
+ char *str = NULL;
+ xasprintf(&str, "%d,%s,%d%c%c",
+ file->proc->pid, file->proc->command, file->association,
+ (file->mode & S_IRUSR)? 'r': '-',
+ (file->mode & S_IWUSR)? 'w': '-');
+ return str;
+}
+
+static bool fifo_fill_column(struct proc *proc __attribute__((__unused__)),
+ struct file *file,
+ struct libscols_line *ln,
+ int column_id,
+ size_t column_index)
+{
+ char *str = NULL;
+
+ switch(column_id) {
+ case COL_TYPE:
+ if (scols_line_set_data(ln, column_index, "FIFO"))
+ err(EXIT_FAILURE, _("failed to add output data"));
+ return true;
+ case COL_SOURCE:
+ if (major(file->stat.st_dev) == 0
+ && strncmp(file->name, "pipe:", 5) == 0) {
+ str = xstrdup("pipefs");
+ break;
+ }
+ return false;
+ case COL_ENDPOINTS: {
+ struct fifo *this = (struct fifo *)file;
+ struct list_head *e;
+ char *estr;
+ list_for_each_backwardly(e, &this->endpoint.ipc->endpoints) {
+ struct fifo *other = list_entry(e, struct fifo, endpoint.endpoints);
+ if (this == other)
+ continue;
+ if (str)
+ xstrputc(&str, '\n');
+ estr = fifo_xstrendpoint(&other->file);
+ xstrappend(&str, estr);
+ free(estr);
+ }
+ if (!str)
+ return false;
+ break;
+ }
+ default:
+ return false;
+ }
+
+ if (!str)
+ err(EXIT_FAILURE, _("failed to add output data"));
+ if (scols_line_refer_data(ln, column_index, str))
+ err(EXIT_FAILURE, _("failed to add output data"));
+ return true;
+}
+
+static unsigned int fifo_get_hash(struct file *file)
+{
+ return (unsigned int)(file->stat.st_ino % UINT_MAX);
+}
+
+static bool fifo_is_suitable_ipc(struct ipc *ipc, struct file *file)
+{
+ return ((struct fifo_ipc *)ipc)->ino == file->stat.st_ino;
+}
+
+static const struct ipc_class *fifo_get_ipc_class(struct file *file __attribute__((__unused__)))
+{
+ static const struct ipc_class fifo_ipc_class = {
+ .get_hash = fifo_get_hash,
+ .is_suitable_ipc = fifo_is_suitable_ipc,
+ .free = NULL,
+ };
+ return &fifo_ipc_class;
+}
+
+static void fifo_initialize_content(struct file *file)
+{
+ struct fifo *fifo = (struct fifo *)file;
+ struct ipc *ipc;
+ unsigned int hash;
+
+ INIT_LIST_HEAD(&fifo->endpoint.endpoints);
+ ipc = get_ipc(file);
+ if (ipc)
+ goto link;
+
+ ipc = xmalloc(sizeof(struct fifo_ipc));
+ ipc->class = fifo_get_ipc_class(file);
+ INIT_LIST_HEAD(&ipc->endpoints);
+ INIT_LIST_HEAD(&ipc->ipcs);
+ ((struct fifo_ipc *)ipc)->ino = file->stat.st_ino;
+
+ hash = fifo_get_hash(file);
+ add_ipc(ipc, hash);
+ link:
+ fifo->endpoint.ipc = ipc;
+ list_add(&fifo->endpoint.endpoints, &ipc->endpoints);
+}
+
+const struct file_class fifo_class = {
+ .super = &file_class,
+ .size = sizeof(struct fifo),
+ .fill_column = fifo_fill_column,
+ .initialize_content = fifo_initialize_content,
+ .free_content = NULL,
+ .get_ipc_class = fifo_get_ipc_class,
+};