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
|
/* ISC license. */
#include <sys/types.h>
#include <limits.h>
#include <skalibs/uint.h>
#include <skalibs/gidstuff.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#include <s6/config.h>
#define USAGE "s6-ipcserver [ -q | -Q | -v ] [ -d | -D ] [ -P | -p ] [ -1 ] [ -c maxconn ] [ -C localmaxconn ] [ -b backlog ] [ -G gid,gid,... ] [ -g gid ] [ -u uid ] [ -U ] path prog..."
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv, char const *const *envp)
{
unsigned int verbosity = 1 ;
int flag1 = 0 ;
int flagU = 0 ;
int flaglookup = 1 ;
int flagreuse = 1 ;
unsigned int uid = 0, gid = 0 ;
gid_t gids[NGROUPS_MAX] ;
unsigned int gidn = (unsigned int)-1 ;
unsigned int maxconn = 0 ;
unsigned int localmaxconn = 0 ;
unsigned int backlog = (unsigned int)-1 ;
PROG = "s6-ipcserver" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "qQvDd1UPpc:C:b:u:g:G:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'q' : verbosity = 0 ; break ;
case 'Q' : verbosity = 1 ; break ;
case 'v' : verbosity = 2 ; break ;
case 'D' : flagreuse = 0 ; break ;
case 'd' : flagreuse = 1 ; break ;
case 'P' : flaglookup = 0 ; break ;
case 'p' : flaglookup = 1 ; 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 (!uint0_scan(l.arg, &uid)) dieusage() ; break ;
case 'g' : if (!uint0_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 = (unsigned int)-1 ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
if (argc < 2) dieusage() ;
}
{
size_t pos = 0 ;
unsigned int m = 0 ;
char fmt[UINT_FMT * 5 + GID_FMT * NGROUPS_MAX] ;
char const *newargv[24 + argc] ;
newargv[m++] = S6_BINPREFIX "s6-ipcserver-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++ ;
if (flagU || uid || gid || gidn != (unsigned int)-1)
{
newargv[m++] = S6_BINPREFIX "s6-applyuidgid" ;
if (flagU) newargv[m++] = "-Uz" ;
if (uid)
{
newargv[m++] = "-u" ;
newargv[m++] = fmt + pos ;
pos += uint_fmt(fmt + pos, uid) ;
fmt[pos++] = 0 ;
}
if (gid)
{
newargv[m++] = "-g" ;
newargv[m++] = fmt + pos ;
pos += uint_fmt(fmt + pos, gid) ;
fmt[pos++] = 0 ;
}
if (gidn != (unsigned int)-1)
{
newargv[m++] = "-G" ;
newargv[m++] = fmt + pos ;
pos += gid_fmtlist(fmt + pos, gids, gidn) ;
fmt[pos++] = 0 ;
}
newargv[m++] = "--" ;
}
newargv[m++] = S6_BINPREFIX "s6-ipcserverd" ;
if (!verbosity) newargv[m++] = "-v0" ;
else if (verbosity == 2) newargv[m++] = "-v2" ;
if (flag1) newargv[m++] = "-1" ;
if (!flaglookup) newargv[m++] = "-P" ;
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 ;
pathexec_run(newargv[0], newargv, envp) ;
strerr_dieexec(111, newargv[0]) ;
}
}
|
