1 files changed, 43 insertions, 42 deletions
diff --git a/content/notes/2024-06-17-sending-signals-to-c-programs.md b/content/notes/2024-06-17-sending-signals-to-c-programs.md
index 94f0b94..bd4a895 100644
--- a/content/notes/2024-06-17-sending-signals-to-c-programs.md
+++ b/content/notes/2024-06-17-sending-signals-to-c-programs.md
@@ -9,8 +9,8 @@ draft: false
 For simple and easy IPC to the C program we can use signals.
 https://www.man7.org/linux/man-pages/man7/signal.7.html
-Only two user defined signals are available but you can hijack other ones even
+Only two user defined signals are available (`SIGUSR1` and `SIGUSR2`) but you
-though this is really not advisable.
+can hijack other ones even though this is really not advisable.
 ```c
 // signal.c
@@ -39,43 +39,44 @@ Compile with `gcc -o signal signal.c` and run the program with `./signal` and
 then from another terminal send the signal to the program with `kill -10
 $(pidof signal)` which should print out `Signal received: 10`.
-| Signal    | x86/ARM | Alpha/ | MIPS | PARISC | Notes         |
+| Signal      | x86/ARM | Alpha/ | MIPS   | PARISC | Notes         |
-|-----------|---------|--------|------|--------|---------------|
+|-------------|---------|--------|--------|--------|---------------|
-| SIGHUP    | 1       | 1      | 1    | 1      |               |
+| SIGHUP      | 1       | 1      | 1      | 1      |               |
-| SIGINT    | 2       | 2      | 2    | 2      |               |
+| SIGINT      | 2       | 2      | 2      | 2      |               |
-| SIGQUIT   | 3       | 3      | 3    | 3      |               |
+| SIGQUIT     | 3       | 3      | 3      | 3      |               |
-| SIGILL    | 4       | 4      | 4    | 4      |               |
+| SIGILL      | 4       | 4      | 4      | 4      |               |
-| SIGTRAP   | 5       | 5      | 5    | 5      |               |
+| SIGTRAP     | 5       | 5      | 5      | 5      |               |
-| SIGABRT   | 6       | 6      | 6    | 6      |               |
+| SIGABRT     | 6       | 6      | 6      | 6      |               |
-| SIGIOT    | 6       | 6      | 6    | 6      |               |
+| SIGIOT      | 6       | 6      | 6      | 6      |               |
-| SIGBUS    | 7       | 10     | 10   | 10     |               |
+| SIGBUS      | 7       | 10     | 10     | 10     |               |
-| SIGEMT    | -       | 7      | 7    | -      |               |
+| SIGEMT      | -       | 7      | 7      | -      |               |
-| SIGFPE    | 8       | 8      | 8    | 8      |               |
+| SIGFPE      | 8       | 8      | 8      | 8      |               |
-| SIGKILL   | 9       | 9      | 9    | 9      |               |
+| SIGKILL     | 9       | 9      | 9      | 9      |               |
-| SIGUSR1   | 10      | 30     | 16   | 16     |               |
+| **SIGUSR1** | **10**  | **30** | **16** | **16** |               |
-| SIGSEGV   | 11      | 11     | 11   | 11     |               |
+| SIGSEGV     | 11      | 11     | 11     | 11     |               |
-| SIGUSR2   | 12      | 31     | 17   | 17     |               |
+| **SIGUSR2** | **12**  | **31** | **17** | **17** |               |
-| SIGPIPE   | 13      | 13     | 13   | 13     |               |
+| SIGPIPE     | 13      | 13     | 13     | 13     |               |
-| SIGALRM   | 14      | 14     | 14   | 14     |               |
+| SIGALRM     | 14      | 14     | 14     | 14     |               |
-| SIGTERM   | 15      | 15     | 15   | 15     |               |
+| SIGTERM     | 15      | 15     | 15     | 15     |               |
-| SIGSTKFLT | 16      | -      | -    | 7      |               |
+| SIGSTKFLT   | 16      | -      | -      | 7      |               |
-| SIGCHLD   | 17      | 20     | 18   | 18     |               |
+| SIGCHLD     | 17      | 20     | 18     | 18     |               |
-| SIGCLD    | -       | -      | 18   | -      |               |
+| SIGCLD      | -       | -      | 18     | -      |               |
-| SIGCONT   | 18      | 19     | 25   | 26     |               |
+| SIGCONT     | 18      | 19     | 25     | 26     |               |
-| SIGSTOP   | 19      | 17     | 23   | 24     |               |
+| SIGSTOP     | 19      | 17     | 23     | 24     |               |
-| SIGTSTP   | 20      | 18     | 24   | 25     |               |
+| SIGTSTP     | 20      | 18     | 24     | 25     |               |
-| SIGTTIN   | 21      | 21     | 26   | 27     |               |
+| SIGTTIN     | 21      | 21     | 26     | 27     |               |
-| SIGTTOU   | 22      | 22     | 27   | 28     |               |
+| SIGTTOU     | 22      | 22     | 27     | 28     |               |
-| SIGURG    | 23      | 16     | 21   | 29     |               |
+| SIGURG      | 23      | 16     | 21     | 29     |               |
-| SIGXCPU   | 24      | 24     | 30   | 12     |               |
+| SIGXCPU     | 24      | 24     | 30     | 12     |               |
-| SIGXFSZ   | 25      | 25     | 31   | 30     |               |
+| SIGXFSZ     | 25      | 25     | 31     | 30     |               |
-| SIGVTALRM | 26      | 26     | 28   | 20     |               |
+| SIGVTALRM   | 26      | 26     | 28     | 20     |               |
-| SIGPROF   | 27      | 27     | 29   | 21     |               |
+| SIGPROF     | 27      | 27     | 29     | 21     |               |
-| SIGWINCH  | 28      | 28     | 20   | 23     |               |
+| SIGWINCH    | 28      | 28     | 20     | 23     |               |
-| SIGIO     | 29      | 23     | 22   | 22     |               |
+| SIGIO       | 29      | 23     | 22     | 22     |               |
-| SIGPOLL   |         |        |      |        | Same as SIGIO |
+| SIGPOLL     |         |        |        |        | Same as SIGIO |
-| SIGPWR    | 30      | 29/-   | 19   | 19     |               |
+| SIGPWR      | 30      | 29/-   | 19     | 19     |               |
-| SIGINFO   | -       | 29/-   | -    | -      |               |
+| SIGINFO     | -       | 29/-   | -      | -      |               |
-| SIGLOST   | -       | -/29   | -    | -      |               |
+| SIGLOST     | -       | -/29   | -      | -      |               |
-| SIGSYS    | 31      | 12     | 12   | 31     |               |
+| SIGSYS      | 31      | 12     | 12     | 31     |               |
-| SIGUNUSED | 31      | -      | -    | 31     |               |
+| SIGUNUSED   | 31      | -      | -      | 31     |               |

diff --git a/content/notes/2024-06-17-sending-signals-to-c-programs.md b/content/notes/2024-06-17-sending-signals-to-c-programs.md index 94f0b94..bd4a895 100644 --- a/content/notes/2024-06-17-sending-signals-to-c-programs.md +++ b/content/notes/2024-06-17-sending-signals-to-c-programs.md
@@ -9,8 +9,8 @@ draft: false
9	For simple and easy IPC to the C program we can use signals.	9	For simple and easy IPC to the C program we can use signals.
10	https://www.man7.org/linux/man-pages/man7/signal.7.html	10	https://www.man7.org/linux/man-pages/man7/signal.7.html
11		11
12	Only two user defined signals are available but you can hijack other ones even	12	Only two user defined signals are available (`SIGUSR1` and `SIGUSR2`) but you
13	though this is really not advisable.	13	can hijack other ones even though this is really not advisable.
14		14
15	```c	15	```c
16	// signal.c	16	// signal.c
@@ -39,43 +39,44 @@ Compile with `gcc -o signal signal.c` and run the program with `./signal` and
39	then from another terminal send the signal to the program with `kill -10	39	then from another terminal send the signal to the program with `kill -10
40	$(pidof signal)` which should print out `Signal received: 10`.	40	$(pidof signal)` which should print out `Signal received: 10`.
41		41
42	\| Signal \| x86/ARM \| Alpha/ \| MIPS \| PARISC \| Notes \|	42	\| Signal \| x86/ARM \| Alpha/ \| MIPS \| PARISC \| Notes \|
43	\|-----------\|---------\|--------\|------\|--------\|---------------\|	43	\|-------------\|---------\|--------\|--------\|--------\|---------------\|
44	\| SIGHUP \| 1 \| 1 \| 1 \| 1 \| \|	44	\| SIGHUP \| 1 \| 1 \| 1 \| 1 \| \|
45	\| SIGINT \| 2 \| 2 \| 2 \| 2 \| \|	45	\| SIGINT \| 2 \| 2 \| 2 \| 2 \| \|
46	\| SIGQUIT \| 3 \| 3 \| 3 \| 3 \| \|	46	\| SIGQUIT \| 3 \| 3 \| 3 \| 3 \| \|
47	\| SIGILL \| 4 \| 4 \| 4 \| 4 \| \|	47	\| SIGILL \| 4 \| 4 \| 4 \| 4 \| \|
48	\| SIGTRAP \| 5 \| 5 \| 5 \| 5 \| \|	48	\| SIGTRAP \| 5 \| 5 \| 5 \| 5 \| \|
49	\| SIGABRT \| 6 \| 6 \| 6 \| 6 \| \|	49	\| SIGABRT \| 6 \| 6 \| 6 \| 6 \| \|
50	\| SIGIOT \| 6 \| 6 \| 6 \| 6 \| \|	50	\| SIGIOT \| 6 \| 6 \| 6 \| 6 \| \|
51	\| SIGBUS \| 7 \| 10 \| 10 \| 10 \| \|	51	\| SIGBUS \| 7 \| 10 \| 10 \| 10 \| \|
52	\| SIGEMT \| - \| 7 \| 7 \| - \| \|	52	\| SIGEMT \| - \| 7 \| 7 \| - \| \|
53	\| SIGFPE \| 8 \| 8 \| 8 \| 8 \| \|	53	\| SIGFPE \| 8 \| 8 \| 8 \| 8 \| \|
54	\| SIGKILL \| 9 \| 9 \| 9 \| 9 \| \|	54	\| SIGKILL \| 9 \| 9 \| 9 \| 9 \| \|
55	\| SIGUSR1 \| 10 \| 30 \| 16 \| 16 \| \|	55	\| SIGUSR1 \| 10 \| 30 \| 16 \| 16 \| \|
56	\| SIGSEGV \| 11 \| 11 \| 11 \| 11 \| \|	56	\| SIGSEGV \| 11 \| 11 \| 11 \| 11 \| \|
57	\| SIGUSR2 \| 12 \| 31 \| 17 \| 17 \| \|	57	\| SIGUSR2 \| 12 \| 31 \| 17 \| 17 \| \|
58	\| SIGPIPE \| 13 \| 13 \| 13 \| 13 \| \|	58	\| SIGPIPE \| 13 \| 13 \| 13 \| 13 \| \|
59	\| SIGALRM \| 14 \| 14 \| 14 \| 14 \| \|	59	\| SIGALRM \| 14 \| 14 \| 14 \| 14 \| \|
60	\| SIGTERM \| 15 \| 15 \| 15 \| 15 \| \|	60	\| SIGTERM \| 15 \| 15 \| 15 \| 15 \| \|
61	\| SIGSTKFLT \| 16 \| - \| - \| 7 \| \|	61	\| SIGSTKFLT \| 16 \| - \| - \| 7 \| \|
62	\| SIGCHLD \| 17 \| 20 \| 18 \| 18 \| \|	62	\| SIGCHLD \| 17 \| 20 \| 18 \| 18 \| \|
63	\| SIGCLD \| - \| - \| 18 \| - \| \|	63	\| SIGCLD \| - \| - \| 18 \| - \| \|
64	\| SIGCONT \| 18 \| 19 \| 25 \| 26 \| \|	64	\| SIGCONT \| 18 \| 19 \| 25 \| 26 \| \|
65	\| SIGSTOP \| 19 \| 17 \| 23 \| 24 \| \|	65	\| SIGSTOP \| 19 \| 17 \| 23 \| 24 \| \|
66	\| SIGTSTP \| 20 \| 18 \| 24 \| 25 \| \|	66	\| SIGTSTP \| 20 \| 18 \| 24 \| 25 \| \|
67	\| SIGTTIN \| 21 \| 21 \| 26 \| 27 \| \|	67	\| SIGTTIN \| 21 \| 21 \| 26 \| 27 \| \|
68	\| SIGTTOU \| 22 \| 22 \| 27 \| 28 \| \|	68	\| SIGTTOU \| 22 \| 22 \| 27 \| 28 \| \|
69	\| SIGURG \| 23 \| 16 \| 21 \| 29 \| \|	69	\| SIGURG \| 23 \| 16 \| 21 \| 29 \| \|
70	\| SIGXCPU \| 24 \| 24 \| 30 \| 12 \| \|	70	\| SIGXCPU \| 24 \| 24 \| 30 \| 12 \| \|
71	\| SIGXFSZ \| 25 \| 25 \| 31 \| 30 \| \|	71	\| SIGXFSZ \| 25 \| 25 \| 31 \| 30 \| \|
72	\| SIGVTALRM \| 26 \| 26 \| 28 \| 20 \| \|	72	\| SIGVTALRM \| 26 \| 26 \| 28 \| 20 \| \|
73	\| SIGPROF \| 27 \| 27 \| 29 \| 21 \| \|	73	\| SIGPROF \| 27 \| 27 \| 29 \| 21 \| \|
74	\| SIGWINCH \| 28 \| 28 \| 20 \| 23 \| \|	74	\| SIGWINCH \| 28 \| 28 \| 20 \| 23 \| \|
75	\| SIGIO \| 29 \| 23 \| 22 \| 22 \| \|	75	\| SIGIO \| 29 \| 23 \| 22 \| 22 \| \|
76	\| SIGPOLL \| \| \| \| \| Same as SIGIO \|	76	\| SIGPOLL \| \| \| \| \| Same as SIGIO \|
77	\| SIGPWR \| 30 \| 29/- \| 19 \| 19 \| \|	77	\| SIGPWR \| 30 \| 29/- \| 19 \| 19 \| \|
78	\| SIGINFO \| - \| 29/- \| - \| - \| \|	78	\| SIGINFO \| - \| 29/- \| - \| - \| \|
79	\| SIGLOST \| - \| -/29 \| - \| - \| \|	79	\| SIGLOST \| - \| -/29 \| - \| - \| \|
80	\| SIGSYS \| 31 \| 12 \| 12 \| 31 \| \|	80	\| SIGSYS \| 31 \| 12 \| 12 \| 31 \| \|
81	\| SIGUNUSED \| 31 \| - \| - \| 31 \| \|	81	\| SIGUNUSED \| 31 \| - \| - \| 31 \| \|
		82