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
|
/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) many different people. If you wrote this, please
* acknowledge your work.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libbb.h"
FILE *
gz_open(FILE *compressed_file, int *pid)
{
int unzip_pipe[2];
if (pipe(unzip_pipe)!=0) {
perror_msg("pipe");
return(NULL);
}
/* If we don't flush, we end up with two copies of anything pending,
one from the parent, one from the child */
fflush(stdout);
fflush(stderr);
if ((*pid = fork()) == -1) {
perror_msg("fork");
return(NULL);
}
if (*pid==0) {
/* child process */
close(unzip_pipe[0]);
unzip(compressed_file, fdopen(unzip_pipe[1], "w"));
fflush(NULL);
fclose(compressed_file);
close(unzip_pipe[1]);
_exit(EXIT_SUCCESS);
}
close(unzip_pipe[1]);
return(fdopen(unzip_pipe[0], "r"));
}
int
gz_close(int gunzip_pid)
{
int status;
int ret;
if (waitpid(gunzip_pid, &status, 0) == -1) {
perror_msg("waitpid");
return -1;
}
if (WIFSIGNALED(status)) {
error_msg("Unzip process killed by signal %d.\n",
WTERMSIG(status));
return -1;
}
if (!WIFEXITED(status)) {
/* shouldn't happen */
error_msg("Your system is broken: got status %d from waitpid.\n",
status);
return -1;
}
if ((ret = WEXITSTATUS(status))) {
error_msg("Unzip process failed with return code %d.\n",
ret);
return -1;
}
return 0;
}
|
