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Handle block output excess properly

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This commit is contained in:
Utkarsh Verma 2022-01-03 10:34:20 +05:30
parent 978229b265
commit 7df6de59b5
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GPG Key ID: 817656CF818EFCCC
1 changed files with 18 additions and 9 deletions
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27
main.c
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@ -12,8 +12,9 @@
#define POLL_INTERVAL 50
#define LEN(arr) (sizeof(arr) / sizeof(arr[0]))
#define BLOCK(cmd, interval, signal) {"echo \"$(" cmd ")\"", interval, signal}
typedef struct {
#define BLOCK(cmd, interval, signal) \
{ "echo \"$(" cmd ")\"", interval, signal }
typedef const struct {
const char* command;
const unsigned int interval;
const unsigned int signal;
@ -24,16 +25,22 @@ typedef struct {
#undef CLICKABLE_BLOCKS
#define CLICKABLE_BLOCKS 1
#else
#undef CLICKABLE_BLOCKS
#define CLICKABLE_BLOCKS 0
#endif
#ifdef LEADING_DELIMITER
#undef LEADING_DELIMITER
#define LEADING_DELIMITER 1
#else
#define LEADING_DELIMITER 0
#endif
static Display* dpy;
static int screen;
static Window root;
static unsigned short int statusContinue = 1;
static char outputs[LEN(blocks)][CMDLENGTH + 1 + CLICKABLE_BLOCKS];
static char statusBar[2][LEN(blocks) * ((LEN(outputs[0]) - 1) + (LEN(DELIMITER) - 1)) + 1];
static char statusBar[2][LEN(blocks) * (LEN(outputs[0]) - 1) + (LEN(blocks) - 1 + LEADING_DELIMITER) * (LEN(DELIMITER) - 1) + 1];
static struct epoll_event event, events[LEN(blocks) + 2];
static int pipes[LEN(blocks)][2];
static int timerPipe[2];
@ -79,7 +86,7 @@ int getStatus(char* new, char* old) {
new[0] = '\0';
for (int i = 0; i < LEN(blocks); i++) {
#ifdef LEADING_DELIMITER
#if LEADING_DELIMITER
if (strlen(outputs[i]))
#else
if (strlen(new) && strlen(outputs[i]))
@ -92,9 +99,14 @@ int getStatus(char* new, char* old) {
void updateBlock(int i) {
char* output = outputs[i];
char buffer[LEN(outputs[0])];
char buffer[LEN(outputs[0]) - CLICKABLE_BLOCKS];
int bytesRead = read(pipes[i][0], buffer, LEN(buffer));
if (bytesRead == 1) {
output[0] = '\0';
return;
}
// Trim UTF-8 characters properly
int j = bytesRead - 1;
while ((buffer[j] & 0b11000000) == 0x80)
@ -111,9 +123,6 @@ void updateBlock(int i) {
char ch;
while (read(pipes[i][0], &ch, 1) == 1 && ch != '\n')
;
} else if (bytesRead == 1) {
output[0] = '\0';
return;
}
#if CLICKABLE_BLOCKS