A quick script to wait for a certain pid, then once that quits, execute a command.
\nYou may ask, why not just do command1 && command2 ? Well, if command1 exits with a non-zero exit status value, command2 will not get executed. Hence, I’ve brewed a quick script for this purpose.<\/p>\n
File: \/usr\/local\/bin\/waitpid<\/p>\n
\r\n#!\/bin\/sh\r\n# Find the pid of the required process either by using psaux | grep -i command\r\n# or by pidof command\r\n#set -x\r\nif [ $# -ne 3 ]; then\r\n\techo \"Usage: waitpid [pid to wait for] [app name] [command]\"\r\n\techo \" [command] should be command to execute after pid is dead\"\r\n\texit 1\r\nfi\r\npidr=$1\r\napp=$2\r\nwhile true; do\r\n\tpid=`pidof $app | grep -o $pidr`\r\n\tif [ \"$pid\" = \"$pidr\" ]; then\r\n\t\t# do nothing\r\n\t\techo \"pid does exist,\"\r\n\t\techo \"waiting for 5 seconds before next check\"\r\n\t\tsleep 5\r\n\t\tcontinue\r\n\tfi\r\n\tbreak\r\ndone\r\n# if we've reached here it means that the PID is dead\r\necho \"specified pid does NOT exist,\"\r\necho \"running command provided in 10 seconds\"\r\necho \"\"\r\necho \"Press Ctrl + c to stop\"\r\nsleep 10\r\n$3\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"A quick script to wait for a certain pid, then once that quits, execute a command. You may ask, why not just do command1 && command2 ? Well, if command1 exits with a non-zero exit status value, command2 will not get executed. Hence, I’ve brewed a quick script for this purpose. File: \/usr\/local\/bin\/waitpid #!\/bin\/sh # […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[52,10],"tags":[185,187,186,184,189,188,183],"class_list":["post-903","post","type-post","status-publish","format-standard","hentry","category-code","category-linux","tag-command-execute","tag-detect-pid-end","tag-detect-pid-life","tag-execute-command-after-pid","tag-pid-exit","tag-pid-quit","tag-wait-for-pid"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t