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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/* ISC license. */
#include <sys/types.h>
#include <limits.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr.h>
#include <skalibs/exec.h>
#include <s6/config.h>
#include <s6-networking/config.h>
#define USAGE "s6-tcpserver6 [ -v verbosity ] [ -d | -D ] [ -1 ] [ -c maxconn ] [ -C localmaxconn ] [ -b backlog ] [ -G gid,gid,... ] [ -g gid ] [ -u uid ] [ -U ] ip port prog..."
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
unsigned int verbosity = 1 ;
int flag1 = 0 ;
int flagU = 0 ;
int flagreuse = 1 ;
uid_t uid = 0 ;
gid_t gid = 0 ;
gid_t gids[NGROUPS_MAX] ;
size_t gidn = (size_t)-1 ;
unsigned int maxconn = 0 ;
unsigned int localmaxconn = 0 ;
unsigned int backlog = (unsigned int)-1 ;
PROG = "s6-tcpserver6" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "Dd1Uv:c:C:b:u:g:G:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'D' : flagreuse = 0 ; break ;
case 'd' : flagreuse = 1 ; break ;
case 'v' : if (!uint0_scan(l.arg, &verbosity)) dieusage() ; break ;
case 'c' : if (!uint0_scan(l.arg, &maxconn)) dieusage() ; if (!maxconn) maxconn = 1 ; break ;
case 'C' : if (!uint0_scan(l.arg, &localmaxconn)) dieusage() ; if (!localmaxconn) localmaxconn = 1 ; break ;
case 'b' : if (!uint0_scan(l.arg, &backlog)) dieusage() ; break ;
case 'u' : if (!uid0_scan(l.arg, &uid)) dieusage() ; break ;
case 'g' : if (!gid0_scan(l.arg, &gid)) dieusage() ; break ;
case 'G' : if (!gid_scanlist(gids, NGROUPS_MAX, l.arg, &gidn) && *l.arg) dieusage() ; break ;
case '1' : flag1 = 1 ; break ;
case 'U' : flagU = 1 ; uid = 0 ; gid = 0 ; gidn = (size_t)-1 ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
if (argc < 3) dieusage() ;
}
{
size_t pos = 0 ;
unsigned int m = 0 ;
char fmt[UINT_FMT * 4 + UID_FMT + GID_FMT * (NGROUPS_MAX + 1)] ;
char const *newargv[24 + argc] ;
newargv[m++] = S6_NETWORKING_BINPREFIX "s6-tcpserver6-socketbinder" ;
if (!flagreuse) newargv[m++] = "-D" ;
if (backlog != (unsigned int)-1)
{
if (!backlog) backlog = 1 ;
newargv[m++] = "-b" ;
newargv[m++] = fmt + pos ;
pos += uint_fmt(fmt + pos, backlog) ;
fmt[pos++] = 0 ;
}
newargv[m++] = "--" ;
newargv[m++] = *argv++ ;
newargv[m++] = *argv++ ;
if (flagU || uid || gid || gidn != (size_t)-1)
{
newargv[m++] = S6_EXTBINPREFIX "s6-applyuidgid" ;
if (flagU) newargv[m++] = "-Uz" ;
if (uid)
{
newargv[m++] = "-u" ;
newargv[m++] = fmt + pos ;
pos += uid_fmt(fmt + pos, uid) ;
fmt[pos++] = 0 ;
}
if (gid)
{
newargv[m++] = "-g" ;
newargv[m++] = fmt + pos ;
pos += gid_fmt(fmt + pos, gid) ;
fmt[pos++] = 0 ;
}
if (gidn != (size_t)-1)
{
newargv[m++] = "-G" ;
newargv[m++] = fmt + pos ;
pos += gid_fmtlist(fmt + pos, gids, gidn) ;
fmt[pos++] = 0 ;
}
newargv[m++] = "--" ;
}
newargv[m++] = S6_NETWORKING_BINPREFIX "s6-tcpserver6d" ;
if (verbosity != 1)
{
newargv[m++] = "-v" ;
newargv[m++] = fmt + pos ;
pos += uint_fmt(fmt + pos, verbosity) ;
fmt[pos++] = 0 ;
}
if (flag1) newargv[m++] = "-1" ;
if (maxconn)
{
newargv[m++] = "-c" ;
newargv[m++] = fmt + pos ;
pos += uint_fmt(fmt + pos, maxconn) ;
fmt[pos++] = 0 ;
}
if (localmaxconn)
{
newargv[m++] = "-C" ;
newargv[m++] = fmt + pos ;
pos += uint_fmt(fmt + pos, localmaxconn) ;
fmt[pos++] = 0 ;
}
newargv[m++] = "--" ;
while (*argv) newargv[m++] = *argv++ ;
newargv[m++] = 0 ;
xexec(newargv) ;
}
}
|
