mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
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* zdev - Modify and display the persistent configuration of devices
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*
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* Copyright IBM Corp. 2016, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "devnode.h"
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#include "findmnt.h"
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#include "misc.h"
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#define FINDMNT_CMDLINE "findmnt -n -T %s -o SOURCE 2>/dev/null"
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static struct devnode *devnode_from_line(const char *line)
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{
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char *copy, *end;
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struct devnode *devnode;
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copy = misc_strdup(line);
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/* Could be /dev/sda[/subvolname] */
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end = strchr(copy, '[');
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if (end)
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*end = 0;
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devnode = devnode_from_node(copy, err_ignore);
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free(copy);
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return devnode;
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}
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/* Return a newly allocated ptrlist containing all devnodes that provide
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* the file system on which @path is located. Return %NULL if no devnodes
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* were found. We need this in addition to lsblk output because lsblk doesn't
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* work with btrfs subvolumes. */
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struct util_list *findmnt_get_devnodes_by_path(const char *path)
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{
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struct util_list *devnodes;
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char *quoted_path, *cmd, *output, *next, *curr;
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struct devnode *devnode;
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devnodes = ptrlist_new();
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quoted_path = quote_str(path, 1);
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cmd = misc_asprintf(FINDMNT_CMDLINE, quoted_path);
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output = misc_read_cmd_output(cmd, 0, err_ignore);
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if (!output)
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goto out;
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/* Iterate over each line. */
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next = output;
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while ((curr = strsep(&next, "\n"))) {
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devnode = devnode_from_line(curr);
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if (devnode)
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ptrlist_add(devnodes, devnode);
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}
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out:
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free(output);
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free(cmd);
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free(quoted_path);
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/* Make empty list detection easier for calling function. */
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if (util_list_is_empty(devnodes)) {
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ptrlist_free(devnodes, 1);
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devnodes = NULL;
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}
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return devnodes;
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}
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