1 // SPDX-License-Identifier: GPL-2.0-only
2 ///
3 /// From Documentation/filesystems/sysfs.rst:
4 /// show() should only use sysfs_emit() or sysfs_emit_at() when formatting
5 /// the value to be returned to user space.
6 ///
7 // Confidence: High
8 // Copyright: (C) 2020 Denis Efremov ISPRAS
9 // Options: --no-includes --include-headers
10 //
11
12 virtual report
13 virtual org
14 virtual context
15 virtual patch
16
17 @r depends on !patch@
18 identifier show, dev, attr, buf;
19 position p;
20 @@
21
22 ssize_t show(struct device *dev, struct device_attribute *attr, char *buf)
23 {
24 <...
25 * return snprintf@p(...);
26 ...>
27 }
28
29 @rp depends on patch@
30 identifier show, dev, attr, buf;
31 expression BUF, SZ, FORMAT;
32 @@
33
34 ssize_t show(struct device *dev, struct device_attribute *attr, char *buf)
35 {
36 <...
37 return
38 - snprintf(BUF, SZ, FORMAT
39 + sysfs_emit(BUF, FORMAT
40 ,...);
41 ...>
42 }
43
44 @script: python depends on report@
45 p << r.p;
46 @@
47
48 coccilib.report.print_report(p[0], "WARNING: please use sysfs_emit or sysfs_emit_at")
49
50 @script: python depends on org@
51 p << r.p;
52 @@
53
54 coccilib.org.print_todo(p[0], "WARNING: please use sysfs_emit or sysfs_emit_at")
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