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UNIX for Beginners Questions & Answers
Search a multi-line shell command output and execute logic based on result
Post 303042194 by yogi on Wednesday 18th of December 2019 03:54:11 PM
12-18-2019
Thanks, this works! 
--- Post updated at 09:54 PM ---
A bit of an unrelated question, the snippet mentioned by Scrutinizer works when calling cargo build. If I use a hot-reload tool such as cargo-watch as my initial command, it does not work. I was reading the documents for cargo-watch and it seems to be built on top of watchexec, not sure if that blocks I/O somehow? Does anyone know how I can get the grep command to work with cargo watch? What is stopping it from functioning as intended?
--- Post updated at 09:54 PM ---
A bit of an unrelated question, the snippet mentioned by Scrutinizer works when calling cargo build. If I use a hot-reload tool such as cargo-watch as my initial command, it does not work. I was reading the documents for cargo-watch and it seems to be built on top of watchexec, not sure if that blocks I/O somehow? Does anyone know how I can get the grep command to work with cargo watch? What is stopping it from functioning as intended?
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LEARN ABOUT POSIX
inotify_rm_watch
INOTIFY_RM_WATCH(2) Linux Programmer's Manual INOTIFY_RM_WATCH(2) NAME
inotify_rm_watch - remove an existing watch from an inotify instance SYNOPSIS
#include <sys/inotify.h> int inotify_rm_watch(int fd, int wd); DESCRIPTION
inotify_rm_watch() removes the watch associated with the watch descriptor wd from the inotify instance associated with the file descriptor fd. Removing a watch causes an IN_IGNORED event to be generated for this watch descriptor. (See inotify(7).) RETURN VALUE
On success, inotify_rm_watch() returns zero. On error, -1 is returned and errno is set to indicate the cause of the error. ERRORS
EBADF fd is not a valid file descriptor. EINVAL The watch descriptor wd is not valid; or fd is not an inotify file descriptor. VERSIONS
Inotify was merged into the 2.6.13 Linux kernel. CONFORMING TO
This system call is Linux-specific. SEE ALSO
inotify_add_watch(2), inotify_init(2), inotify(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. Linux 2017-09-15 INOTIFY_RM_WATCH(2)