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@ -27,12 +27,12 @@ typedef struct {
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static void buttonhandler(int sig, siginfo_t *info, void *ucontext);
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static void cleanup();
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static void getcmd(Block *block, int sigval);
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static void setroot();
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static void setupsignals();
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static void sighandler(int sig, siginfo_t *si, void *ucontext);
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static void statusloop();
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static void termhandler(int sig);
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static void updateblock(Block *block, int sigval);
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static int updatestatus();
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static void writepid();
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@ -74,60 +74,6 @@ cleanup()
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XCloseDisplay(dpy);
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}
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void
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getcmd(Block *block, int sigval)
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{
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int fd[2];
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if (pipe(fd) == -1) {
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perror("getcmd - pipe");
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exit(1);
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}
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switch (fork()) {
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case -1:
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perror("getcmd - fork");
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exit(1);
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case 0:
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close(ConnectionNumber(dpy));
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close(fd[0]);
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if (fd[1] != STDOUT_FILENO) {
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if (dup2(fd[1], STDOUT_FILENO) != STDOUT_FILENO) {
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perror("getcmd - child - dup2");
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exit(1);
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}
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close(fd[1]);
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}
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if (sigval == NILL) {
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char *arg[] = { block->pathu, NULL };
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execv(arg[0], arg);
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} else {
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char buf[12];
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char *arg[] = { block->pathu, buf, NULL };
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snprintf(buf, sizeof buf, "%d", sigval);
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execv(arg[0], arg);
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}
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perror("getcmd - child - execv");
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_exit(127);
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default:
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{
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size_t trd = 0;
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ssize_t rd;
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close(fd[1]);
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do
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rd = read(fd[0], block->cmdoutcur + trd, CMDLENGTH - trd);
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while (rd > 0 && (trd += rd) < CMDLENGTH);
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if (rd == -1) {
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perror("getcmd - read");
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exit(1);
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}
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close(fd[0]);
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}
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}
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}
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void
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setroot()
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{
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@ -194,7 +140,7 @@ sighandler(int sig, siginfo_t *info, void *ucontext)
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sig -= SIGRTMIN;
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for (Block *block = blocks; block->pathu; block++)
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if (block->signal == sig)
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getcmd(block, info->si_value.sival_int);
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updateblock(block, info->si_value.sival_int);
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setroot();
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}
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@ -208,7 +154,7 @@ statusloop()
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sigprocmask(SIG_BLOCK, &blocksigmask, NULL);
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for (Block *block = blocks; block->pathu; block++)
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if (block->interval >= 0)
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getcmd(block, NILL);
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updateblock(block, NILL);
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setroot();
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sigprocmask(SIG_UNBLOCK, &blocksigmask, NULL);
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t.tv_sec = INTERVALs, t.tv_nsec = INTERVALn;
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@ -223,7 +169,7 @@ statusloop()
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sigprocmask(SIG_BLOCK, &blocksigmask, NULL);
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for (Block *block = blocks; block->pathu; block++)
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if (block->interval > 0 && i % block->interval == 0)
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getcmd(block, NILL);
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updateblock(block, NILL);
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setroot();
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sigprocmask(SIG_UNBLOCK, &blocksigmask, NULL);
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t.tv_sec = INTERVALs, t.tv_nsec = INTERVALn;
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@ -238,6 +184,60 @@ termhandler(int sig)
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exit(0);
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}
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void
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updateblock(Block *block, int sigval)
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{
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int fd[2];
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if (pipe(fd) == -1) {
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perror("updateblock - pipe");
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exit(1);
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}
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switch (fork()) {
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case -1:
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perror("updateblock - fork");
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exit(1);
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case 0:
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close(ConnectionNumber(dpy));
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close(fd[0]);
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if (fd[1] != STDOUT_FILENO) {
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if (dup2(fd[1], STDOUT_FILENO) != STDOUT_FILENO) {
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perror("updateblock - child - dup2");
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exit(1);
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}
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close(fd[1]);
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}
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if (sigval == NILL) {
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char *arg[] = { block->pathu, NULL };
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execv(arg[0], arg);
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} else {
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char buf[12];
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char *arg[] = { block->pathu, buf, NULL };
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snprintf(buf, sizeof buf, "%d", sigval);
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execv(arg[0], arg);
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}
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perror("updateblock - child - execv");
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_exit(127);
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default:
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{
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size_t trd = 0;
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ssize_t rd;
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close(fd[1]);
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do
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rd = read(fd[0], block->cmdoutcur + trd, CMDLENGTH - trd);
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while (rd > 0 && (trd += rd) < CMDLENGTH);
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if (rd == -1) {
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perror("updateblock - read");
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exit(1);
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}
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close(fd[0]);
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}
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}
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}
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/* returns whether block outputs have changed and updates statustext if they have */
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int
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updatestatus()
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