/usr/share/uim/process.scm is in libuim-data 1:1.8.6+gh20161003.0.d63dadd-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | ;;; process.scm: process operation functions for uim.
;;;
;;; Copyright (c) 2009-2013 uim Project https://github.com/uim/uim
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;; 3. Neither the name of authors nor the names of its contributors
;;; may be used to endorse or promote products derived from this software
;;; without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
;;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
;;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
;;; OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
;;; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
;;; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
;;; OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
;;; SUCH DAMAGE.
;;;;
(require-extension (srfi 2))
(require "i18n.scm")
(require "fileio.scm")
(require-dynlib "process")
(define process-waitpid-options-alist (process-waitpid-options?))
(define (process-execute file . args)
(let-optionals* args ((argv (list file))
(envp #f))
(if envp
(execve file argv envp)
(execvp file argv))))
(define process-exec-failed 1)
(define process-dup2-failed 2)
(define process-fork-failed 4)
(define (process-io file . args)
(let-optionals* args ((argv (list file)))
(and-let* ((pin (create-pipe))
(pout (create-pipe))
(pin-in (car pin))
(pin-out (cdr pin))
(pout-in (car pout))
(pout-out (cdr pout)))
(let ((pid (process-fork))
(ret 0))
(cond ((< pid 0)
(begin
(uim-notify-fatal (N_ "cannot fork"))
(file-close pin-in)
(file-close pin-out)
(file-close pout-in)
(file-close pout-out)
#f))
((= 0 pid) ;; child
(setsid)
(file-close pin-out)
(if (< (duplicate-fileno pin-in 0) 0)
(begin
(uim-notify-fatal (N_ "cannot duplicate stdin"))
(set! ret (bitwise-ior ret process-dup2-failed))))
(file-close pin-in)
(file-close pout-in)
(if (< (duplicate-fileno pout-out 1) 0)
(begin
(uim-notify-fatal (N_ "cannot duplicate stdout"))
(set! ret (bitwise-ior ret process-dup2-failed))))
(file-close pout-out)
(if (= (process-execute file argv) -1)
(uim-notify-fatal (format (_ "cannot execute ~a") file)))
(set! ret (bitwise-ior ret process-exec-failed))
(file-write-string 1 (number->string ret))
(_exit 1)
)
(else ;; parent
(file-close pin-in)
(file-close pout-out)
(if (and-let*
(((file-ready? (list pout-in) 100))
(lst (file-read pout-in 1))
((not (eof-object? lst)))
((> (string->number (list->string lst)) 0))))
(begin
(file-close pout-in)
(file-close pin-out)
#f)
(cons pout-in pin-out))))))))
(define (process-with-daemon file . args)
(let-optionals* args ((argv (list file)))
(let ((pid (process-fork)))
(cond ((< pid 0)
(begin
(uim-notify-fatal (N_ "cannot fork"))
#f))
((= 0 pid) ;; child
(daemon 0 1)
(if (= (process-execute file argv) -1)
(uim-notify-fatal (format (_ "cannot execute ~a") file)))
(_exit 1))
(else
pid)))))
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