qugalet/dwmblocks
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Fixed exit bugs; check signals getting out of range

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This commit is contained in:
Ashish Kumar Yadav 2021-04-04 20:36:29 +05:30
parent 839261d66b
commit a99b2b13e3
1 changed files with 17 additions and 5 deletions
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22
dwmblocks.c
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@ -73,14 +73,22 @@ setupsignals()
{ {
struct sigaction sa; struct sigaction sa;
/* populate blocksigmask */ /* populate blocksigmask and check validity of signals */
sigemptyset(&blocksigmask); sigemptyset(&blocksigmask);
sigaddset(&blocksigmask, SIGHUP); sigaddset(&blocksigmask, SIGHUP);
sigaddset(&blocksigmask, SIGINT); sigaddset(&blocksigmask, SIGINT);
sigaddset(&blocksigmask, SIGTERM); sigaddset(&blocksigmask, SIGTERM);
for (Block *block = blocks; block->pathu; block++) for (Block *block = blocks; block->pathu; block++) {
if (block->signal > 0) if (block->signal <= 0)
sigaddset(&blocksigmask, SIGRTMIN + block->signal); continue;
if (block->signal > SIGRTMAX - SIGRTMIN) {
fprintf(stderr, "Error: SIGRTMIN + %d exceeds SIGRTMAX.\n", block->signal);
unlink(LOCKFILE);
XCloseDisplay(dpy);
exit(2);
}
sigaddset(&blocksigmask, SIGRTMIN + block->signal);
}
/* setup signal handlers */ /* setup signal handlers */
/* to handle HUP, INT and TERM */ /* to handle HUP, INT and TERM */
@ -165,11 +173,13 @@ updateblock(Block *block, int sigval)
if (pipe(fd) == -1) { if (pipe(fd) == -1) {
perror("updateblock - pipe"); perror("updateblock - pipe");
cleanup();
exit(1); exit(1);
} }
switch (fork()) { switch (fork()) {
case -1: case -1:
perror("updateblock - fork"); perror("updateblock - fork");
cleanup();
exit(1); exit(1);
case 0: case 0:
close(ConnectionNumber(dpy)); close(ConnectionNumber(dpy));
@ -205,6 +215,7 @@ updateblock(Block *block, int sigval)
while (rd > 0 && (trd += rd) < CMDOUTLENGTH); while (rd > 0 && (trd += rd) < CMDOUTLENGTH);
if (rd == -1) { if (rd == -1) {
perror("updateblock - read"); perror("updateblock - read");
cleanup();
exit(1); exit(1);
} }
close(fd[0]); close(fd[0]);
@ -286,11 +297,12 @@ writepid()
int int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
writepid();
if (!(dpy = XOpenDisplay(NULL))) { if (!(dpy = XOpenDisplay(NULL))) {
fputs("Error: could not open display.\n", stderr); fputs("Error: could not open display.\n", stderr);
unlink(LOCKFILE);
return 1; return 1;
} }
writepid();
setupsignals(); setupsignals();
statusloop(); statusloop();
cleanup(); cleanup();