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
|
/*
# xdg_vfs_forkexec.c
#
# Copyright 2006, Norbert Frese
#
# LICENSE:
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
#---------------------------------------------*/
#include <unistd.h>
#include <stdio.h>
#include "xdg_vfs_forkexec.h"
int xdg_vfs_forkexec(char * filename, char ** argv, pid_t * child_pid, int * childs_stdin, int * childs_stdout)
{
pid_t pid;
int child_stdin_pipe[2];
int child_stdout_pipe[2];
/* create pipes */
if (pipe (child_stdin_pipe))
{
fprintf (stderr, "Pipe child_stdin_pipe failed.\n");
return 1;
}
if (pipe (child_stdout_pipe))
{
fprintf (stderr, "Pipe child_stdout_pipe failed.\n");
return 1;
}
/* create the child process */
pid = fork ();
if (pid == (pid_t) 0)
{
int r;
/* this is the child process. close other ends of the pipes. */
close (child_stdin_pipe[1]);
close (child_stdout_pipe[0]);
dup2 (child_stdin_pipe[0], STDIN_FILENO);
dup2 (child_stdout_pipe[1], STDOUT_FILENO);
r = execvp(filename, argv);
if (r) {
close (child_stdin_pipe[0]);
close (child_stdout_pipe[1]);
fprintf(stderr, "after fork execvp(%s, argv) ", filename);
perror("failed");
exit(1);
}
exit(0);
}
else if (pid < (pid_t) 0)
{
/* the fork failed */
fprintf (stderr, "Fork failed.\n");
return 1;
}
else
{
/* this is the parent process. close other ends first. */
close (child_stdin_pipe[0]);
close (child_stdout_pipe[1]);
//write_to_pipe (mypipe[1]);
*childs_stdin = child_stdin_pipe[1];
*childs_stdout = child_stdout_pipe[0];
*child_pid = pid;
return 0;
}
}
|
