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Add curl example (#42)

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make -j8 o//examples/curl.com
    o//examples/curl.com http://justine.lol/ape.html
This commit is contained in:
Justine Tunney 2021-02-18 19:20:41 -08:00
parent 667ab245fe
commit 2c15efc249
29 changed files with 208 additions and 153 deletions
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107
examples/curl.c Normal file
View file

@ -0,0 +1,107 @@
#if 0
/*─────────────────────────────────────────────────────────────────╗
│ To the extent possible under law, Justine Tunney has waived │
│ all copyright and related or neighboring rights to this file, │
│ as it is written in the following disclaimers: │
│ • http://unlicense.org/ │
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "libc/bits/safemacros.h"
#include "libc/dns/dns.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/fmt.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.h"
#include "libc/runtime/gc.h"
#include "libc/runtime/runtime.h"
#include "libc/sock/sock.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/af.h"
#include "libc/sysv/consts/ai.h"
#include "libc/sysv/consts/ipproto.h"
#include "libc/sysv/consts/shut.h"
#include "libc/sysv/consts/sock.h"
#include "libc/x/x.h"
#include "net/http/uri.h"
/**
* @fileoverview Downloads HTTP URL to stdout.
*
* make -j8 o//examples/curl.com
* o//examples/curl.com http://justine.lol/ape.html
*/
int main(int argc, char *argv[]) {
int sock;
ssize_t rc;
unsigned long need;
struct UriSlice path;
size_t i, got, toto, msglen;
char buf[1500], host[256], port[7];
const char *url, *msg, *pathstr, *crlfcrlf, *contentlength;
struct UriSlice us[16];
struct Uri u = {.segs.p = us, .segs.n = ARRAYLEN(us)};
struct addrinfo *addr, *addrs;
struct addrinfo hints = {.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM,
.ai_protocol = IPPROTO_TCP,
.ai_flags = AI_NUMERICSERV};
if (argc != 2) {
fprintf(stderr, "USAGE: %s URL\n", argv[0]);
exit(1);
}
url = argv[1];
CHECK_NE(-1, uriparse(&u, url, strlen(url)), "BAD URL: %`'s", url);
CHECK_EQ(kUriSchemeHttp, urischeme(u.scheme, url));
urislice2cstr(host, sizeof(host), u.host, url, "127.0.0.1");
urislice2cstr(port, sizeof(port), u.port, url, "80");
path = uripath(&u);
pathstr = path.n ? url + path.i : "/";
msg = gc(xstrcat("GET ", pathstr,
" HTTP/1.1\r\n"
"Host: ",
host,
"\r\n"
"Connection: close\r\n"
"Content-Length: 0\r\n"
"Accept: text/plain; */*\r\n"
"Accept-Encoding: identity\r\n"
"User-Agent: github.com/jart/cosmopolitan\r\n"
"\r\n"));
msglen = strlen(msg);
CHECK_EQ(EAI_SUCCESS, getaddrinfo(host, port, &hints, &addrs));
for (addr = addrs; addr; addr = addr->ai_next) {
CHECK_NE(-1, (sock = socket(addr->ai_family, addr->ai_socktype,
addr->ai_protocol)));
CHECK_NE(-1, connect(sock, addr->ai_addr, addr->ai_addrlen));
CHECK_EQ(msglen, write(sock, msg, msglen));
shutdown(sock, SHUT_WR);
buf[0] = '\0';
CHECK_NE(-1, (rc = read(sock, buf, sizeof(buf))));
got = rc;
CHECK(startswith(buf, "HTTP/1.1 200"), "%`'.*s", got, buf);
CHECK_NOTNULL((crlfcrlf = memmem(buf, got, "\r\n\r\n", 4)));
need =
strtol((char *)firstnonnull(
firstnonnull(
memmem(buf, crlfcrlf - buf, "\r\nContent-Length: ", 18),
memmem(buf, crlfcrlf - buf, "\r\ncontent-length: ", 18)),
"\r\nContent-Length: -1") +
18,
NULL, 10);
got = MIN(got - (crlfcrlf + 4 - buf), need);
CHECK_EQ(got, write(1, crlfcrlf + 4, got));
for (toto = got; toto < need; toto += got) {
CHECK_NE(-1, (rc = read(sock, buf, sizeof(buf))));
if (!(got = rc)) exit(18);
got = MIN(got, need - toto);
CHECK_EQ(got, write(1, buf, got));
}
LOGIFNEG1(close(sock));
break;
}
return 0;
}

2
examples/examples.mk
View file

@ -40,6 +40,7 @@ EXAMPLES_DIRECTDEPS = \
LIBC_ALG \ LIBC_ALG \
LIBC_BITS \ LIBC_BITS \
LIBC_CALLS \ LIBC_CALLS \
LIBC_DNS \
LIBC_FMT \ LIBC_FMT \
LIBC_INTRIN \ LIBC_INTRIN \
LIBC_LOG \ LIBC_LOG \
@ -64,6 +65,7 @@ EXAMPLES_DIRECTDEPS = \
LIBC_UNICODE \ LIBC_UNICODE \
LIBC_X \ LIBC_X \
LIBC_ZIPOS \ LIBC_ZIPOS \
NET_HTTP \
THIRD_PARTY_COMPILER_RT \ THIRD_PARTY_COMPILER_RT \
THIRD_PARTY_DLMALLOC \ THIRD_PARTY_DLMALLOC \
THIRD_PARTY_GDTOA \ THIRD_PARTY_GDTOA \

33
libc/dns/dns.h
View file

@ -1,15 +1,34 @@
#ifndef COSMOPOLITAN_LIBC_DNS_DNS_H_ #ifndef COSMOPOLITAN_LIBC_DNS_DNS_H_
#define COSMOPOLITAN_LIBC_DNS_DNS_H_ #define COSMOPOLITAN_LIBC_DNS_DNS_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0) #include "libc/dns/resolvconf.h"
COSMOPOLITAN_C_START_ #include "libc/sock/sock.h"
#define DNS_PORT 53 #define DNS_PORT 53
#define DNS_NAME_MAX 253 #define DNS_NAME_MAX 253
#define DNS_LABEL_MAX 63 #define DNS_LABEL_MAX 63
struct sockaddr; #define EAI_SUCCESS 0
struct sockaddr_in; #define EAI_BADFLAGS -1
struct ResolvConf; #define EAI_NONAME -2
#define EAI_AGAIN -3
#define EAI_FAIL -4
#define EAI_NODATA -5
#define EAI_FAMILY -6
#define EAI_SOCKTYPE -7
#define EAI_SERVICE -8
#define EAI_ADDRFAMILY -9
#define EAI_MEMORY -10
#define EAI_OVERFLOW -12
#define EAI_SYSTEM -11
#define EAI_ALLDONE -103
#define EAI_CANCELED -101
#define EAI_IDN_ENCODE -105
#define EAI_INPROGRESS -100
#define EAI_INTR -104
#define EAI_NOTCANCELED -102
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
struct addrinfo { struct addrinfo {
int32_t ai_flags; /* AI_XXX */ int32_t ai_flags; /* AI_XXX */

63
libc/dns/eai2str.c
View file

@ -17,30 +17,51 @@
│ PERFORMANCE OF THIS SOFTWARE. │ │ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/ ╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dns/dns.h" #include "libc/dns/dns.h"
#include "libc/sysv/consts/eai.h"
/** /**
* Turns getaddrinfo() return code into string. * Turns getaddrinfo() return code into string.
*/ */
const char *eai2str(int code) { const char *eai2str(int code) {
if (code == EAI_ADDRFAMILY) return "ADDRFAMILY"; switch (code) {
if (code == EAI_AGAIN) return "AGAIN"; case EAI_ADDRFAMILY:
if (code == EAI_ALLDONE) return "ALLDONE"; return "ADDRFAMILY";
if (code == EAI_BADFLAGS) return "BADFLAGS"; case EAI_AGAIN:
if (code == EAI_CANCELED) return "CANCELED"; return "AGAIN";
if (code == EAI_FAIL) return "FAIL"; case EAI_ALLDONE:
if (code == EAI_FAMILY) return "FAMILY"; return "ALLDONE";
if (code == EAI_IDN_ENCODE) return "ENCODE"; case EAI_BADFLAGS:
if (code == EAI_INPROGRESS) return "INPROGRESS"; return "BADFLAGS";
if (code == EAI_INTR) return "INTR"; case EAI_CANCELED:
if (code == EAI_MEMORY) return "MEMORY"; return "CANCELED";
if (code == EAI_NODATA) return "NODATA"; case EAI_FAIL:
if (code == EAI_NONAME) return "NONAME"; return "FAIL";
if (code == EAI_NOTCANCELED) return "NOTCANCELED"; case EAI_FAMILY:
if (code == EAI_OVERFLOW) return "OVERFLOW"; return "FAMILY";
if (code == EAI_SERVICE) return "SERVICE"; case EAI_IDN_ENCODE:
if (code == EAI_SOCKTYPE) return "SOCKTYPE"; return "ENCODE";
if (code == EAI_SUCCESS) return "SUCCESS"; case EAI_INPROGRESS:
if (code == EAI_SYSTEM) return "SYSTEM"; return "INPROGRESS";
return "???"; case EAI_INTR:
return "INTR";
case EAI_MEMORY:
return "MEMORY";
case EAI_NODATA:
return "NODATA";
case EAI_NONAME:
return "NONAME";
case EAI_NOTCANCELED:
return "NOTCANCELED";
case EAI_OVERFLOW:
return "OVERFLOW";
case EAI_SERVICE:
return "SERVICE";
case EAI_SOCKTYPE:
return "SOCKTYPE";
case EAI_SUCCESS:
return "SUCCESS";
case EAI_SYSTEM:
return "SYSTEM";
default:
return "???";
}
} }

1
libc/dns/getaddrinfo.c
View file

@ -27,7 +27,6 @@
#include "libc/str/str.h" #include "libc/str/str.h"
#include "libc/sysv/consts/af.h" #include "libc/sysv/consts/af.h"
#include "libc/sysv/consts/ai.h" #include "libc/sysv/consts/ai.h"
#include "libc/sysv/consts/eai.h"
#include "libc/sysv/consts/inaddr.h" #include "libc/sysv/consts/inaddr.h"
#include "libc/sysv/errfuns.h" #include "libc/sysv/errfuns.h"

5
libc/dns/resolvconf.h
View file

@ -1,11 +1,10 @@
#ifndef COSMOPOLITAN_LIBC_DNS_RESOLVCONF_H_ #ifndef COSMOPOLITAN_LIBC_DNS_RESOLVCONF_H_
#define COSMOPOLITAN_LIBC_DNS_RESOLVCONF_H_ #define COSMOPOLITAN_LIBC_DNS_RESOLVCONF_H_
#include "libc/sock/sock.h"
#include "libc/stdio/stdio.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0) #if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_ COSMOPOLITAN_C_START_
struct FILE;
struct sockaddr_in;
struct Nameservers { struct Nameservers {
size_t i, n; size_t i, n;
struct sockaddr_in *p; struct sockaddr_in *p;

23
libc/sysv/consts.sh
View file

@ -1833,29 +1833,6 @@ syscon gai AI_NUMERICSERV 0x0400 0x1000 8 0x10 0x10 8
syscon gai AI_ALL 0x10 0x0100 0x0100 0 0 0x0100 syscon gai AI_ALL 0x10 0x0100 0x0100 0 0 0x0100
syscon gai AI_V4MAPPED 8 0x0800 0x0800 0 0 0x0800 syscon gai AI_V4MAPPED 8 0x0800 0x0800 0 0 0x0800
# getaddrinfo() return codes
#
# group name GNU/Systemd XNU's Not UNIX FreeBSD OpenBSD NetBSD XENIX Commentary
syscon eai EAI_SUCCESS 0 0 0 0 0 0
syscon eai EAI_BADFLAGS -1 3 3 -1 -1 0x2726
syscon eai EAI_NONAME -2 8 8 -2 -2 0x2af9
syscon eai EAI_AGAIN -3 2 2 -3 -3 0x2afa
syscon eai EAI_FAIL -4 4 4 -4 -4 0x2afb
syscon eai EAI_FAMILY -6 5 5 -6 -6 0x273f
syscon eai EAI_MEMORY -10 6 6 -10 -10 0x2747
syscon eai EAI_SERVICE -8 9 9 -8 -8 0x277d
syscon eai EAI_SOCKTYPE -7 10 10 -7 -7 0x273c
syscon eai EAI_NODATA -5 7 0 -5 -5 0x2af9
syscon eai EAI_OVERFLOW -12 14 14 -14 -14 -12
syscon eai EAI_SYSTEM -11 11 11 -11 -11 -11
syscon eai EAI_ADDRFAMILY -9 1 0 -9 -9 -9
syscon eai EAI_ALLDONE -103 -103 -103 -103 -103 -103 # copying from linux
syscon eai EAI_CANCELED -101 -101 -101 -101 -101 -101 # copying from linux
syscon eai EAI_IDN_ENCODE -105 -105 -105 -105 -105 -105 # copying from linux
syscon eai EAI_INPROGRESS -100 -100 -100 -100 -100 -100 # copying from linux
syscon eai EAI_INTR -104 -104 -104 -104 -104 -104 # copying from linux
syscon eai EAI_NOTCANCELED -102 -102 -102 -102 -102 -102 # copying from linux
syscon misc BLK_BYTECOUNT 2 2 2 2 2 0 # unix consensus syscon misc BLK_BYTECOUNT 2 2 2 2 2 0 # unix consensus
syscon misc BLK_EOF 0x40 0x40 0x40 0x40 0x40 0 # unix consensus syscon misc BLK_EOF 0x40 0x40 0x40 0x40 0x40 0 # unix consensus
syscon misc BLK_EOR 0x80 0x80 0x80 0x80 0x80 0 # unix consensus syscon misc BLK_EOR 0x80 0x80 0x80 0x80 0x80 0 # unix consensus

2
libc/sysv/consts/EAI_ADDRFAMILY.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_ADDRFAMILY,-9,1,0,-9,-9,-9

2
libc/sysv/consts/EAI_AGAIN.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_AGAIN,-3,2,2,-3,-3,0x2afa

2
libc/sysv/consts/EAI_ALLDONE.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_ALLDONE,-103,-103,-103,-103,-103,-103

2
libc/sysv/consts/EAI_BADFLAGS.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_BADFLAGS,-1,3,3,-1,-1,0x2726

2
libc/sysv/consts/EAI_CANCELED.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_CANCELED,-101,-101,-101,-101,-101,-101

2
libc/sysv/consts/EAI_FAIL.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_FAIL,-4,4,4,-4,-4,0x2afb

2
libc/sysv/consts/EAI_FAMILY.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_FAMILY,-6,5,5,-6,-6,0x273f

2
libc/sysv/consts/EAI_IDN_ENCODE.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_IDN_ENCODE,-105,-105,-105,-105,-105,-105

2
libc/sysv/consts/EAI_INPROGRESS.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_INPROGRESS,-100,-100,-100,-100,-100,-100

2
libc/sysv/consts/EAI_INTR.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_INTR,-104,-104,-104,-104,-104,-104

2
libc/sysv/consts/EAI_MEMORY.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_MEMORY,-10,6,6,-10,-10,0x2747

2
libc/sysv/consts/EAI_NODATA.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_NODATA,-5,7,0,-5,-5,0x2af9

2
libc/sysv/consts/EAI_NONAME.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_NONAME,-2,8,8,-2,-2,0x2af9

2
libc/sysv/consts/EAI_NOTCANCELED.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_NOTCANCELED,-102,-102,-102,-102,-102,-102

2
libc/sysv/consts/EAI_OVERFLOW.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_OVERFLOW,-12,14,14,-14,-14,-12

2
libc/sysv/consts/EAI_SERVICE.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_SERVICE,-8,9,9,-8,-8,0x277d

2
libc/sysv/consts/EAI_SOCKTYPE.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_SOCKTYPE,-7,10,10,-7,-7,0x273c

2
libc/sysv/consts/EAI_SUCCESS.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_SUCCESS,0,0,0,0,0,0

2
libc/sysv/consts/EAI_SYSTEM.S
View file

@ -1,2 +0,0 @@
#include "libc/sysv/consts/syscon.internal.h"
.syscon eai,EAI_SYSTEM,-11,11,11,-11,-11,-11

49
libc/sysv/consts/eai.h
View file

@ -1,49 +0,0 @@
#ifndef COSMOPOLITAN_LIBC_SYSV_CONSTS_EAI_H_
#define COSMOPOLITAN_LIBC_SYSV_CONSTS_EAI_H_
#include "libc/runtime/symbolic.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern const long EAI_ADDRFAMILY;
extern const long EAI_AGAIN;
extern const long EAI_ALLDONE;
extern const long EAI_BADFLAGS;
extern const long EAI_CANCELED;
extern const long EAI_FAIL;
extern const long EAI_FAMILY;
extern const long EAI_IDN_ENCODE;
extern const long EAI_INPROGRESS;
extern const long EAI_INTR;
extern const long EAI_MEMORY;
extern const long EAI_NODATA;
extern const long EAI_NONAME;
extern const long EAI_NOTCANCELED;
extern const long EAI_OVERFLOW;
extern const long EAI_SERVICE;
extern const long EAI_SOCKTYPE;
extern const long EAI_SYSTEM;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#define EAI_ADDRFAMILY SYMBOLIC(EAI_ADDRFAMILY)
#define EAI_AGAIN SYMBOLIC(EAI_AGAIN)
#define EAI_ALLDONE SYMBOLIC(EAI_ALLDONE)
#define EAI_BADFLAGS SYMBOLIC(EAI_BADFLAGS)
#define EAI_CANCELED SYMBOLIC(EAI_CANCELED)
#define EAI_FAIL SYMBOLIC(EAI_FAIL)
#define EAI_FAMILY SYMBOLIC(EAI_FAMILY)
#define EAI_IDN_ENCODE SYMBOLIC(EAI_IDN_ENCODE)
#define EAI_INPROGRESS SYMBOLIC(EAI_INPROGRESS)
#define EAI_INTR SYMBOLIC(EAI_INTR)
#define EAI_MEMORY SYMBOLIC(EAI_MEMORY)
#define EAI_NODATA SYMBOLIC(EAI_NODATA)
#define EAI_NONAME SYMBOLIC(EAI_NONAME)
#define EAI_NOTCANCELED SYMBOLIC(EAI_NOTCANCELED)
#define EAI_OVERFLOW SYMBOLIC(EAI_OVERFLOW)
#define EAI_SERVICE SYMBOLIC(EAI_SERVICE)
#define EAI_SOCKTYPE SYMBOLIC(EAI_SOCKTYPE)
#define EAI_SUCCESS LITERALLY(0)
#define EAI_SYSTEM SYMBOLIC(EAI_SYSTEM)
#endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_EAI_H_ */

27
net/http/urislice2cstr.c
View file

@ -16,19 +16,30 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │ │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │ │ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/ ╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
#include "libc/str/str.h" #include "libc/str/str.h"
#include "net/http/uri.h" #include "net/http/uri.h"
/* TODO(jart): Unescape */
char *urislice2cstr(char *buf, size_t size, struct UriSlice slice, char *urislice2cstr(char *buf, size_t size, struct UriSlice slice,
const char *uristr, const char *defaultval) { const char *uristr, const char *defaultval) {
/* TODO(jart): Unescape */ size_t n;
if (slice.n && slice.n + 1 < size) { const char *p;
memcpy(buf, uristr + slice.i, slice.n); if (size) {
} else if (defaultval) { if (slice.n) {
memcpy(buf, defaultval, (slice.n = strlen(defaultval))); p = uristr + slice.i;
} else { n = slice.n;
slice.n = 0; } else if (defaultval) {
p = defaultval;
n = strlen(defaultval);
} else {
p = NULL;
n = 0;
}
n = MIN(n, size - 1);
memcpy(buf, p, n);
buf[n] = '\0';
} }
buf[slice.n] = '\0';
return buf; return buf;
} }

13
tool/net/dig.c
View file

@ -31,14 +31,21 @@
#include "tool/decode/lib/socknames.h" #include "tool/decode/lib/socknames.h"
void lookup(const char *name) { void lookup(const char *name) {
int rc;
struct addrinfo hints = (struct addrinfo){.ai_family = AF_INET, struct addrinfo hints = (struct addrinfo){.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM, .ai_socktype = SOCK_STREAM,
.ai_protocol = IPPROTO_TCP, .ai_protocol = IPPROTO_TCP,
.ai_flags = AI_NUMERICSERV}; .ai_flags = AI_NUMERICSERV};
struct addrinfo *addrs = NULL; struct addrinfo *addrs = NULL;
if (getaddrinfo(name, "80", &hints, &addrs) == -1) { switch ((rc = getaddrinfo(name, "80", &hints, &addrs))) {
perror("getaddrinfo"); case EAI_SUCCESS:
exit(1); break;
case EAI_SYSTEM:
perror("getaddrinfo");
exit(1);
default:
fprintf(stderr, "getaddrinfo failed: %d (EAI_%s)\n", rc, eai2str(rc));
exit(1);
} }
if (addrs) { if (addrs) {
for (struct addrinfo *addr = addrs; addr; addr = addr->ai_next) { for (struct addrinfo *addr = addrs; addr; addr = addr->ai_next) {