 |
Handle errors in fscanf and fread. - energy - measure energy usage |
 |
git clone git://bitreich.org/energy git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws… |
 |
Log |
|
Files |
|
Refs |
|
Tags |
|
README |
|
LICENSE |
|
--- |
|
commit 3b9da8cb1c2fcacd4570f25d02194124e526caa2 |
|
parent 94c96ddd16d2012cdaaef649903e8fcc663a9296 |
|
Author: Christoph Lohmann <[email protected]> |
|
Date: Thu, 24 Aug 2023 15:24:43 +0200 |
|
|
|
Handle errors in fscanf and fread. |
|
|
|
Diffstat: |
|
M energy.c | 10 ++++++++-- |
|
|
|
1 file changed, 8 insertions(+), 2 deletions(-) |
|
--- |
|
diff --git a/energy.c b/energy.c |
|
@@ -55,7 +55,10 @@ long long_from_file(const char *fname) { |
|
return -1; |
|
} else { |
|
long x; |
|
- fscanf(f, "%ld", &x); |
|
+ if (fscanf(f, "%ld", &x) < 0) { |
|
+ fprintf(stderr, "%s: %s\n", fname, strerror(errno)); |
|
+ return -1; |
|
+ } |
|
fclose(f); |
|
return x; |
|
} |
|
@@ -118,7 +121,10 @@ void sensor_battery(void) { |
|
} |
|
} else { |
|
char buf[128]; |
|
- fread(buf, 1, sizeof(buf), f); |
|
+ if (fread(buf, 1, sizeof(buf), f) < 1) { |
|
+ fprintf(stderr, "%s: %s\n", battery_status, strerror(errno)); |
|
+ return; |
|
+ } |
|
const char discharging[] = "Discharging"; |
|
// Measurement of battery discharge is only meaningful if the |
|
// battery is actually discharging. |
