1 files changed, 100 insertions, 0 deletions
diff --git a/applied/19.diff b/applied/19.diff
new file mode 100644
index 0000000..2ece3fb
--- /dev/null
+++ b/applied/19.diff
@@ -0,0 +1,100 @@
+diff --git a/herbe.c b/herbe.c
+index 51d3990..8bfdbc1 100644
+--- a/herbe.c
++++ b/herbe.c
+@@ -7,7 +7,8 @@
+ #include <string.h>
+ #include <stdarg.h>
+ #include <fcntl.h>
+-#include <semaphore.h>
++#include <sys/ipc.h>
++#include <sys/shm.h>
+ 
+ #include "config.h"
+ 
+@@ -79,13 +80,23 @@ void expire(int sig)
+ 	XFlush(display);
+ }
+ 
++void read_y_offset(unsigned int **offset, int *id) {
++    int shm_id = shmget(8432, sizeof(unsigned int), IPC_CREAT | 0660);
++    if (shm_id == -1) die("shmget failed");
++
++    *offset = (unsigned int *)shmat(shm_id, 0, 0);
++    if (*offset == (unsigned int *)-1) die("shmat failed\n");
++    *id = shm_id;
++}
++
++void free_y_offset(int id) {
++    shmctl(id, IPC_RMID, NULL);
++}
++
+ int main(int argc, char *argv[])
+ {
+ 	if (argc == 1)
+-	{
+-		sem_unlink("/herbe");
+-		die("Usage: %s body", argv[0]);
+-	}
++        die("Usage: %s body", argv[0]);
+ 
+ 	struct sigaction act_expire, act_ignore;
+ 
+@@ -151,16 +162,22 @@ int main(int argc, char *argv[])
+ 		}
+ 	}
+ 
+-	unsigned int x = pos_x;
+-	unsigned int y = pos_y;
++    int y_offset_id;
++    unsigned int *y_offset;
++    read_y_offset(&y_offset, &y_offset_id);
++
+ 	unsigned int text_height = font->ascent - font->descent;
+ 	unsigned int height = (num_of_lines - 1) * line_spacing + num_of_lines * text_height + 2 * padding;
++	unsigned int x = pos_x;
++	unsigned int y = pos_y + *y_offset;
++
++    unsigned int used_y_offset = (*y_offset) += height + padding;
+ 
+ 	if (corner == TOP_RIGHT || corner == BOTTOM_RIGHT)
+-		x = screen_width - width - border_size * 2 - pos_x;
++		x = screen_width - width - border_size * 2 - x;
+ 
+ 	if (corner == BOTTOM_LEFT || corner == BOTTOM_RIGHT)
+-		y = screen_height - height - border_size * 2 - pos_y;
++		y = screen_height - height - border_size * 2 - y;
+ 
+ 	window = XCreateWindow(display, RootWindow(display, screen), x, y, width, height, border_size, DefaultDepth(display, screen),
+ 						   CopyFromParent, visual, CWOverrideRedirect | CWBackPixel | CWBorderPixel, &attributes);
+@@ -171,9 +188,6 @@ int main(int argc, char *argv[])
+ 	XSelectInput(display, window, ExposureMask | ButtonPress);
+ 	XMapWindow(display, window);
+ 
+-	sem_t *mutex = sem_open("/herbe", O_CREAT, 0644, 1);
+-	sem_wait(mutex);
+-
+ 	sigaction(SIGUSR1, &act_expire, 0);
+ 	sigaction(SIGUSR2, &act_expire, 0);
+ 
+@@ -204,12 +218,11 @@ int main(int argc, char *argv[])
+ 		}
+ 	}
+ 
+-	sem_post(mutex);
+-	sem_close(mutex);
+ 
+ 	for (int i = 0; i < num_of_lines; i++)
+ 		free(lines[i]);
+ 
++    if (used_y_offset == *y_offset) free_y_offset(y_offset_id);
+ 	free(lines);
+ 	XftDrawDestroy(draw);
+ 	XftColorFree(display, visual, colormap, &color);
+@@ -217,4 +230,4 @@ int main(int argc, char *argv[])
+ 	XCloseDisplay(display);
+ 
+ 	return exit_code;
+-}
+\ No newline at end of file
++}