Merge: feat-request-all

avdd

@@ -43,8 +43,10 @@ DEFAULT_PRE=' '
 DEFAULT_SEP_L='| '
 DEFAULT_SEP_R=' '
 DEFAULT_SUF=' '
-MOD_DIR="$(dirname "$0")"/mod
+DIR="$(dirname "$0")"
-FIFO=/tmp/avdd-fifo-"$("$(dirname "$0")"/rpid)"
+MOD_DIR="${DIR}/mod"
+DAEMON="$(basename "$0")"
+FIFO="/tmp/${DAEMON}-fifo-$("${DIR}/rpid" $$)"
 
 mod_list="${1-${DEFAULT_MOD_LIST}}"
 

avds

@@ -5,7 +5,8 @@ USAGE: avds <mod_list|-h|-[-]help> [<when>] [<repeat>]
 
         mod_list
                 A comma or space separated list of modules to request that
-                the daemon execute.
+                the daemon execute. If mod_list begins this '>>* ', then
+                requests are sent to all running daemons.
 
         when    The integer number of milliseconds to wait before sending the
                 request, or one of the following values:
@@ -31,6 +32,10 @@ EXAMPLES:
 
                 avds 'vol,bl'
 
+        Send the previous requests to all running daemons.
+
+                avds '>>* vol,bl'
+
         If there are cpu and memory usage modules named 'cpu' and 'mem'
         that update the cpu and memory usage statuses, send a requst to
         update both of those statuses every 5 seconds.
@@ -44,7 +49,6 @@ EXAMPLES:
                 avds 'bat,dt' m true
 "
 DAEMON=avdd
-FIFO=/tmp/"${DAEMON}"-fifo-"$("$(dirname "$0")"/rpid)"
 
 # Convert integer milliseconds to floating point seconds
 ms_to_s() {
@@ -65,6 +69,15 @@ if [[ "${mod_list}" =~ ^(-h|-(-)?help)$ ]]; then
   exit 0
 fi
 
+# Check if we will be sending requests to all daemons, or set the named pipe
+# for this login session
+if [[ "${mod_list}" =~ ^\>\>\*\  ]]; then
+  mod_list="${mod_list:4}"
+  is_request_all=1
+else
+  fifo="/tmp/${DAEMON}-fifo-$("$(dirname "$0")/rpid" $$)"
+fi
+
 when="${2:-0}"
 
 # Validate when
@@ -103,11 +116,24 @@ while [[ "${first_run}" -eq 1 || -n "${repeat}" ]]; do
     fi
   fi
 
-  # Write each command to the pipe
+  # Write each command to the named pipe for this login session
-  if [[ ! -p "${FIFO}" ]]; then
+  if [[ ! -v is_request_all ]]; then
+    if [[ ! -p "${fifo}" ]]; then
       printf 'The daemon %s is not running\n' "${DAEMON}" 1>&2
       exit 1
     fi
-  printf '%s\n' "${mod_list}" >> "${FIFO}"
+    printf '%s\n' "${mod_list}" >> "${fifo}"
+  # Write each command to all the daemon named pipes
+  else
+    readarray -d '' fifos \
+      < <(find /tmp -maxdepth 1 -type p -name "${DAEMON}-fifo-*" -print0)
+    if [[ "${#fifos[@]}" -eq 0 ]]; then
+      printf 'There are no daemons running\n' 1>&2
+      exit 1
+    fi
+    for fifo in "${fifos[@]}"; do
+      printf '%s\n' "${mod_list}" >> "${fifo}"
+    done
+  fi
 done
 

rpid

@@ -22,6 +22,16 @@ EXAMPLES:
         process.
 
                 rpid
+
+        Get the PID of the first ancestor of the current process, if there
+        is no ancestor named "not_a_process."
+
+                rpid $$ not_a_process
+
+        Get the PID of the current process itself, if it is named
+        "current_process."
+
+                rpid $$ current_process
 '
 
 # Validate the arguments
@@ -40,25 +50,19 @@ fi
 
 root_name="${2:-login}"
 
-get_info() {
+prev_pid="${pid}"
-  local -ri current_pid="$1"
+current_pid="${pid}"
-  if [[ ! -r "/proc/${current_pid}/status" ]]; then exit 1; fi
+while [[ "${name}" != "${root_name}" && -r "/proc/${current_pid}/status" ]]; do
   mapfile info < \
     <(grep --null -E -m 2 '^(Name|PPid):' "/proc/${current_pid}/status" \
       | sort | cut -f 2)
   name="${info[0]##[[:space:]]}"
   name="${name%%[[:space:]]}"
-  ppid="${info[1]##[[:space:]]}"
+  prev_pid="${current_pid}"
-  ppid="${ppid%%[[:space:]]}"
+  current_pid="${info[1]##[[:space:]]}"
-}
+  current_pid="${current_pid%%[[:space:]]}"
-
-next_pid="${pid}"
-while [[ "${name}" != "${root_name}" && "${ppid}" -ne 1 ]]; do
-  get_info "${next_pid}";
-  name_pid="${next_pid}"
-  next_pid="${ppid}"
 done
 
+printf '%s\n' "${prev_pid}"
 if [[ "${name}" != "${root_name}" ]]; then exit 1; fi
-printf '%s\n' "${name_pid}"