alema/ambientd
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This commit is contained in:
Alessandro Mauri 2024-10-11 11:45:21 +02:00
parent 2c1e78f723
commit 439ed71e6e
2 changed files with 12 additions and 5 deletions
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6
Makefile
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@ -1,4 +1,8 @@
CC = gcc CC = gcc
CFLAGS = -Wall -Wextra -pedantic -std=c99 CFLAGS = -Wall -Wextra -pedantic -std=c99 -O2
PREFIX = /usr/local
ambientd: ambientd.c ambientd: ambientd.c
install:
cp ambientd ${PREFIX}/bin/

11
ambientd.c
View file

@ -29,20 +29,21 @@ float min_brightness_percent = 0.05;
// returns the luminance value in percentage between 0 and 1 // returns the luminance value in percentage between 0 and 1
int get_luminance_raw (void) int get_luminance_raw (void)
{ {
freopen(NULL, "r", luminance_fp);
const char *x = fgets(STR_BUFFER, sizeof(STR_BUFFER), luminance_fp); const char *x = fgets(STR_BUFFER, sizeof(STR_BUFFER), luminance_fp);
if (x == NULL) { if (x == NULL) {
fprintf(stderr, "Could not read luminance value: %s\n", strerror(errno));
return -1; return -1;
} }
int luminance = strtol(STR_BUFFER, NULL, 10); int luminance = strtol(STR_BUFFER, NULL, 10);
rewind(luminance_fp);
return luminance; return luminance;
} }
// read a string from a file and convert it to int, should only be used for
// positive numbers since negative numbers mean an error
int read_int(FILE *fp) int read_int(FILE *fp)
{ {
fflush(fp); freopen(NULL, "r", fp);
const char *p = fgets(STR_BUFFER, sizeof(STR_BUFFER), fp); const char *p = fgets(STR_BUFFER, sizeof(STR_BUFFER), fp);
if (p == NULL) { if (p == NULL) {
return -1; return -1;
@ -51,7 +52,6 @@ int read_int(FILE *fp)
if (r == LONG_MIN || r == LONG_MAX) { if (r == LONG_MIN || r == LONG_MAX) {
return -1; return -1;
} }
rewind(fp);
return r; return r;
} }
@ -101,6 +101,9 @@ int main (void)
} }
int x = get_luminance_raw(); int x = get_luminance_raw();
if (x < 0) {
fprintf(stderr, "Could not read luminance value: %s\n", strerror(errno));
}
int luminance_samples[MEDIAN_SAMPLES] = {x, x, x, x}; int luminance_samples[MEDIAN_SAMPLES] = {x, x, x, x};
int idx = 0; int idx = 0;
int user_offset = 0; int user_offset = 0;