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
|
#if !defined(lint) && !defined(DOS)
static char rcsid[] = "$Id: pipe.c 761 2007-10-23 22:35:18Z hubert@u.washington.edu $";
#endif
/*
* ========================================================================
* Copyright 2013-2021 Eduardo Chappa
* Copyright 2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
#include "../pith/headers.h"
#include "../pith/pipe.h"
#include "../pith/status.h"
/* Internal prototypes */
/*
* pipe_* functions introduced so out.f, in.f don't need to be used
* by whatever's setting up the pipe.
* Should be similar on unix and windows, but since we're faking piping
* in windows, closing the write pipe would signify that the child
* process can start running. This makes it possible for PIPE_WRITE
* and PIPE_READ flags to be simultaneously set across all platforms.
* Unix piping should eventually have NON_BLOCKING_IO stuff rolled up
* into it.
*/
int
pipe_putc(int c, PIPE_S *syspipe)
{
if(!syspipe || !syspipe->out.f)
return -1;
return(fputc(c, syspipe->out.f));
}
int
pipe_puts(char *str, PIPE_S *syspipe)
{
if(!syspipe || !syspipe->out.f)
return -1;
return(fputs(str, syspipe->out.f));
}
char *
pipe_gets(char *str, int size, PIPE_S *syspipe)
{
if(!syspipe || !syspipe->in.f)
return NULL;
return(fgets(str, size, syspipe->in.f));
}
int
pipe_readc(unsigned char *c, PIPE_S *syspipe)
{
int rv = 0;
if(!syspipe || !syspipe->in.f)
return -1;
do {
errno = 0;
clearerr(syspipe->in.f);
rv = fread(c, sizeof(unsigned char), (size_t)1, syspipe->in.f);
} while(!rv && ferror(syspipe->in.f) && errno == EINTR);
return(rv);
}
int
pipe_writec(int c, PIPE_S *syspipe)
{
unsigned char ch = (unsigned char)c;
int rv = 0;
if(!syspipe || !syspipe->out.f)
return -1;
do
rv = fwrite(&ch, sizeof(unsigned char), (size_t)1, syspipe->out.f);
while(!rv && ferror(syspipe->out.f) && errno == EINTR);
return(rv);
}
void
pipe_report_error(char *errormsg)
{
q_status_message(SM_ORDER, 3, 3, errormsg);
}
|
