[thirdparty/systemd.git] / src / import / curl-util.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include <fcntl.h>

#include "alloc-util.h"
#include "build.h"
#include "curl-util.h"
#include "fd-util.h"
#include "locale-util.h"
#include "string-util.h"

static void curl_glue_check_finished(CurlGlue *g) {
        CURLMsg *msg;
        int k = 0;

        assert(g);

        msg = curl_multi_info_read(g->curl, &k);
        if (!msg)
                return;

        if (msg->msg != CURLMSG_DONE)
                return;

        if (g->on_finished)
                g->on_finished(g, msg->easy_handle, msg->data.result);
}

static int curl_glue_on_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
        CurlGlue *g = userdata;
        int action, k = 0, translated_fd;

        assert(s);
        assert(g);

        translated_fd = PTR_TO_FD(hashmap_get(g->translate_fds, FD_TO_PTR(fd)));

        if (FLAGS_SET(revents, EPOLLIN | EPOLLOUT))
                action = CURL_POLL_INOUT;
        else if (revents & EPOLLIN)
                action = CURL_POLL_IN;
        else if (revents & EPOLLOUT)
                action = CURL_POLL_OUT;
        else
                action = 0;

        if (curl_multi_socket_action(g->curl, translated_fd, action, &k) != CURLM_OK)
                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Failed to propagate IO event.");

        curl_glue_check_finished(g);
        return 0;
}

static int curl_glue_socket_callback(CURLM *curl, curl_socket_t s, int action, void *userdata, void *socketp) {
        sd_event_source *io;
        CurlGlue *g = userdata;
        uint32_t events = 0;
        int r;

        assert(curl);
        assert(g);

        io = hashmap_get(g->ios, FD_TO_PTR(s));

        if (action == CURL_POLL_REMOVE) {
                if (io) {
                        int fd;

                        fd = sd_event_source_get_io_fd(io);
                        assert(fd >= 0);

                        sd_event_source_set_enabled(io, SD_EVENT_OFF);
                        sd_event_source_unref(io);

                        hashmap_remove(g->ios, FD_TO_PTR(s));
                        hashmap_remove(g->translate_fds, FD_TO_PTR(fd));

                        safe_close(fd);
                }

                return 0;
        }

        r = hashmap_ensure_allocated(&g->ios, &trivial_hash_ops);
        if (r < 0) {
                log_oom();
                return -1;
        }

        r = hashmap_ensure_allocated(&g->translate_fds, &trivial_hash_ops);
        if (r < 0) {
                log_oom();
                return -1;
        }

        if (action == CURL_POLL_IN)
                events = EPOLLIN;
        else if (action == CURL_POLL_OUT)
                events = EPOLLOUT;
        else if (action == CURL_POLL_INOUT)
                events = EPOLLIN|EPOLLOUT;

        if (io) {
                if (sd_event_source_set_io_events(io, events) < 0)
                        return -1;

                if (sd_event_source_set_enabled(io, SD_EVENT_ON) < 0)
                        return -1;
        } else {
                _cleanup_close_ int fd = -1;

                /* When curl needs to remove an fd from us it closes
                 * the fd first, and only then calls into us. This is
                 * nasty, since we cannot pass the fd on to epoll()
                 * anymore. Hence, duplicate the fds here, and keep a
                 * copy for epoll which we control after use. */

                fd = fcntl(s, F_DUPFD_CLOEXEC, 3);
                if (fd < 0)
                        return -1;

                if (sd_event_add_io(g->event, &io, fd, events, curl_glue_on_io, g) < 0)
                        return -1;

                (void) sd_event_source_set_description(io, "curl-io");

                r = hashmap_put(g->ios, FD_TO_PTR(s), io);
                if (r < 0) {
                        log_oom();
                        sd_event_source_unref(io);
                        return -1;
                }

                r = hashmap_put(g->translate_fds, FD_TO_PTR(fd), FD_TO_PTR(s));
                if (r < 0) {
                        log_oom();
                        hashmap_remove(g->ios, FD_TO_PTR(s));
                        sd_event_source_unref(io);
                        return -1;
                }

                fd = -1;
        }

        return 0;
}

static int curl_glue_on_timer(sd_event_source *s, uint64_t usec, void *userdata) {
        CurlGlue *g = userdata;
        int k = 0;

        assert(s);
        assert(g);

        if (curl_multi_socket_action(g->curl, CURL_SOCKET_TIMEOUT, 0, &k) != CURLM_OK)
                return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Failed to propagate timeout.");

        curl_glue_check_finished(g);
        return 0;
}

static int curl_glue_timer_callback(CURLM *curl, long timeout_ms, void *userdata) {
        CurlGlue *g = userdata;
        usec_t usec;

        assert(curl);
        assert(g);

        if (timeout_ms < 0) {
                if (g->timer) {
                        if (sd_event_source_set_enabled(g->timer, SD_EVENT_OFF) < 0)
                                return -1;
                }

                return 0;
        }

        usec = now(clock_boottime_or_monotonic()) + (usec_t) timeout_ms * USEC_PER_MSEC + USEC_PER_MSEC - 1;

        if (g->timer) {
                if (sd_event_source_set_time(g->timer, usec) < 0)
                        return -1;

                if (sd_event_source_set_enabled(g->timer, SD_EVENT_ONESHOT) < 0)
                        return -1;
        } else {
                if (sd_event_add_time(g->event, &g->timer, clock_boottime_or_monotonic(), usec, 0, curl_glue_on_timer, g) < 0)
                        return -1;

                (void) sd_event_source_set_description(g->timer, "curl-timer");
        }

        return 0;
}

CurlGlue *curl_glue_unref(CurlGlue *g) {
        sd_event_source *io;

        if (!g)
                return NULL;

        if (g->curl)
                curl_multi_cleanup(g->curl);

        while ((io = hashmap_steal_first(g->ios))) {
                int fd;

                fd = sd_event_source_get_io_fd(io);
                assert(fd >= 0);

                hashmap_remove(g->translate_fds, FD_TO_PTR(fd));

                safe_close(fd);
                sd_event_source_unref(io);
        }

        hashmap_free(g->ios);

        sd_event_source_unref(g->timer);
        sd_event_unref(g->event);
        return mfree(g);
}

int curl_glue_new(CurlGlue **glue, sd_event *event) {
        _cleanup_(curl_glue_unrefp) CurlGlue *g = NULL;
        _cleanup_(curl_multi_cleanupp) CURL *c = NULL;
        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
        int r;

        if (event)
                e = sd_event_ref(event);
        else {
                r = sd_event_default(&e);
                if (r < 0)
                        return r;
        }

        c = curl_multi_init();
        if (!c)
                return -ENOMEM;

        g = new(CurlGlue, 1);
        if (!g)
                return -ENOMEM;

        *g = (CurlGlue) {
                .event = TAKE_PTR(e),
                .curl = TAKE_PTR(c),
        };

        if (curl_multi_setopt(g->curl, CURLMOPT_SOCKETDATA, g) != CURLM_OK)
                return -EINVAL;

        if (curl_multi_setopt(g->curl, CURLMOPT_SOCKETFUNCTION, curl_glue_socket_callback) != CURLM_OK)
                return -EINVAL;

        if (curl_multi_setopt(g->curl, CURLMOPT_TIMERDATA, g) != CURLM_OK)
                return -EINVAL;

        if (curl_multi_setopt(g->curl, CURLMOPT_TIMERFUNCTION, curl_glue_timer_callback) != CURLM_OK)
                return -EINVAL;

        *glue = TAKE_PTR(g);

        return 0;
}

int curl_glue_make(CURL **ret, const char *url, void *userdata) {
        _cleanup_(curl_easy_cleanupp) CURL *c = NULL;
        const char *useragent;

        assert(ret);
        assert(url);

        c = curl_easy_init();
        if (!c)
                return -ENOMEM;

        /* curl_easy_setopt(c, CURLOPT_VERBOSE, 1L); */

        if (curl_easy_setopt(c, CURLOPT_URL, url) != CURLE_OK)
                return -EIO;

        if (curl_easy_setopt(c, CURLOPT_PRIVATE, userdata) != CURLE_OK)
                return -EIO;

        useragent = strjoina(program_invocation_short_name, "/" GIT_VERSION);
        if (curl_easy_setopt(c, CURLOPT_USERAGENT, useragent) != CURLE_OK)
                return -EIO;

        if (curl_easy_setopt(c, CURLOPT_FOLLOWLOCATION, 1L) != CURLE_OK)
                return -EIO;

        *ret = TAKE_PTR(c);
        return 0;
}

int curl_glue_add(CurlGlue *g, CURL *c) {
        assert(g);
        assert(c);

        if (curl_multi_add_handle(g->curl, c) != CURLM_OK)
                return -EIO;

        return 0;
}

void curl_glue_remove_and_free(CurlGlue *g, CURL *c) {
        assert(g);

        if (!c)
                return;

        if (g->curl)
                curl_multi_remove_handle(g->curl, c);

        curl_easy_cleanup(c);
}

struct curl_slist *curl_slist_new(const char *first, ...) {
        struct curl_slist *l;
        va_list ap;

        if (!first)
                return NULL;

        l = curl_slist_append(NULL, first);
        if (!l)
                return NULL;

        va_start(ap, first);

        for (;;) {
                struct curl_slist *n;
                const char *i;

                i = va_arg(ap, const char*);
                if (!i)
                        break;

                n = curl_slist_append(l, i);
                if (!n) {
                        va_end(ap);
                        curl_slist_free_all(l);
                        return NULL;
                }

                l = n;
        }

        va_end(ap);
        return l;
}

int curl_header_strdup(const void *contents, size_t sz, const char *field, char **value) {
        const char *p;
        char *s;

        p = memory_startswith_no_case(contents, sz, field);
        if (!p)
                return 0;

        sz -= p - (const char*) contents;

        if (memchr(p, 0, sz))
                return 0;

        /* Skip over preceding whitespace */
        while (sz > 0 && strchr(WHITESPACE, p[0])) {
                p++;
                sz--;
        }

        /* Truncate trailing whitespace */
        while (sz > 0 && strchr(WHITESPACE, p[sz-1]))
                sz--;

        s = strndup(p, sz);
        if (!s)
                return -ENOMEM;

        *value = s;
        return 1;
}

int curl_parse_http_time(const char *t, usec_t *ret) {
        _cleanup_(freelocalep) locale_t loc = (locale_t) 0;
        const char *e;
        struct tm tm;
        time_t v;

        assert(t);
        assert(ret);

        loc = newlocale(LC_TIME_MASK, "C", (locale_t) 0);
        if (loc == (locale_t) 0)
                return -errno;

        /* RFC822 */
        e = strptime_l(t, "%a, %d %b %Y %H:%M:%S %Z", &tm, loc);
        if (!e || *e != 0)
                /* RFC 850 */
                e = strptime_l(t, "%A, %d-%b-%y %H:%M:%S %Z", &tm, loc);
        if (!e || *e != 0)
                /* ANSI C */
                e = strptime_l(t, "%a %b %d %H:%M:%S %Y", &tm, loc);
        if (!e || *e != 0)
                return -EINVAL;

        v = timegm(&tm);
        if (v == (time_t) -1)
                return -EINVAL;

        *ret = (usec_t) v * USEC_PER_SEC;
        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
72648326	2
ca78ad1d ZJS	3	#include <fcntl.h>
ca78ad1d ZJS	4
b5efdb8a	5	#include "alloc-util.h"
681bd2c5	6	#include "build.h"
72648326	7	#include "curl-util.h"
3ffd4af2	8	#include "fd-util.h"
e520e0fc	9	#include "locale-util.h"
3ffd4af2	10	#include "string-util.h"
72648326 LP	11
	12	static void curl_glue_check_finished(CurlGlue *g) {
	13	CURLMsg *msg;
	14	int k = 0;
	15
	16	assert(g);
	17
	18	msg = curl_multi_info_read(g->curl, &k);
	19	if (!msg)
	20	return;
	21
	22	if (msg->msg != CURLMSG_DONE)
	23	return;
	24
	25	if (g->on_finished)
	26	g->on_finished(g, msg->easy_handle, msg->data.result);
	27	}
	28
	29	static int curl_glue_on_io(sd_event_source s, int fd, uint32_t revents, void userdata) {
	30	CurlGlue *g = userdata;
	31	int action, k = 0, translated_fd;
	32
	33	assert(s);
	34	assert(g);
	35
23e096cc	36	translated_fd = PTR_TO_FD(hashmap_get(g->translate_fds, FD_TO_PTR(fd)));
72648326	37
d94a24ca	38	if (FLAGS_SET(revents, EPOLLIN \| EPOLLOUT))
72648326 LP	39	action = CURL_POLL_INOUT;
	40	else if (revents & EPOLLIN)
	41	action = CURL_POLL_IN;
	42	else if (revents & EPOLLOUT)
	43	action = CURL_POLL_OUT;
	44	else
	45	action = 0;
	46
baaa35ad ZJS	47	if (curl_multi_socket_action(g->curl, translated_fd, action, &k) != CURLM_OK)
	48	return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
	49	"Failed to propagate IO event.");
72648326 LP	50
	51	curl_glue_check_finished(g);
	52	return 0;
	53	}
	54
	55	static int curl_glue_socket_callback(CURLM curl, curl_socket_t s, int action, void userdata, void *socketp) {
	56	sd_event_source *io;
	57	CurlGlue *g = userdata;
	58	uint32_t events = 0;
	59	int r;
	60
	61	assert(curl);
	62	assert(g);
	63
23e096cc	64	io = hashmap_get(g->ios, FD_TO_PTR(s));
72648326 LP	65
	66	if (action == CURL_POLL_REMOVE) {
	67	if (io) {
	68	int fd;
	69
	70	fd = sd_event_source_get_io_fd(io);
	71	assert(fd >= 0);
	72
	73	sd_event_source_set_enabled(io, SD_EVENT_OFF);
	74	sd_event_source_unref(io);
	75
23e096cc LP	76	hashmap_remove(g->ios, FD_TO_PTR(s));
23e096cc LP	77	hashmap_remove(g->translate_fds, FD_TO_PTR(fd));
72648326 LP	78
	79	safe_close(fd);
	80	}
	81
	82	return 0;
	83	}
	84
	85	r = hashmap_ensure_allocated(&g->ios, &trivial_hash_ops);
	86	if (r < 0) {
	87	log_oom();
	88	return -1;
	89	}
	90
	91	r = hashmap_ensure_allocated(&g->translate_fds, &trivial_hash_ops);
	92	if (r < 0) {
	93	log_oom();
	94	return -1;
	95	}
	96
	97	if (action == CURL_POLL_IN)
	98	events = EPOLLIN;
	99	else if (action == CURL_POLL_OUT)
	100	events = EPOLLOUT;
	101	else if (action == CURL_POLL_INOUT)
	102	events = EPOLLIN\|EPOLLOUT;
	103
	104	if (io) {
	105	if (sd_event_source_set_io_events(io, events) < 0)
	106	return -1;
	107
	108	if (sd_event_source_set_enabled(io, SD_EVENT_ON) < 0)
	109	return -1;
	110	} else {
	111	_cleanup_close_ int fd = -1;
	112
	113	/* When curl needs to remove an fd from us it closes
	114	* the fd first, and only then calls into us. This is
	115	* nasty, since we cannot pass the fd on to epoll()
	116	* anymore. Hence, duplicate the fds here, and keep a
	117	* copy for epoll which we control after use. */
	118
	119	fd = fcntl(s, F_DUPFD_CLOEXEC, 3);
	120	if (fd < 0)
	121	return -1;
	122
	123	if (sd_event_add_io(g->event, &io, fd, events, curl_glue_on_io, g) < 0)
	124	return -1;
	125
edfd706d	126	(void) sd_event_source_set_description(io, "curl-io");
72648326	127
23e096cc	128	r = hashmap_put(g->ios, FD_TO_PTR(s), io);
72648326 LP	129	if (r < 0) {
	130	log_oom();
	131	sd_event_source_unref(io);
	132	return -1;
	133	}
	134
23e096cc	135	r = hashmap_put(g->translate_fds, FD_TO_PTR(fd), FD_TO_PTR(s));
72648326 LP	136	if (r < 0) {
72648326 LP	137	log_oom();
23e096cc	138	hashmap_remove(g->ios, FD_TO_PTR(s));
72648326 LP	139	sd_event_source_unref(io);
	140	return -1;
	141	}
	142
	143	fd = -1;
	144	}
	145
	146	return 0;
	147	}
	148
	149	static int curl_glue_on_timer(sd_event_source s, uint64_t usec, void userdata) {
	150	CurlGlue *g = userdata;
	151	int k = 0;
	152
	153	assert(s);
	154	assert(g);
	155
baaa35ad ZJS	156	if (curl_multi_socket_action(g->curl, CURL_SOCKET_TIMEOUT, 0, &k) != CURLM_OK)
	157	return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
	158	"Failed to propagate timeout.");
72648326 LP	159
	160	curl_glue_check_finished(g);
	161	return 0;
	162	}
	163
	164	static int curl_glue_timer_callback(CURLM curl, long timeout_ms, void userdata) {
	165	CurlGlue *g = userdata;
	166	usec_t usec;
	167
	168	assert(curl);
	169	assert(g);
	170
	171	if (timeout_ms < 0) {
	172	if (g->timer) {
	173	if (sd_event_source_set_enabled(g->timer, SD_EVENT_OFF) < 0)
	174	return -1;
	175	}
	176
	177	return 0;
	178	}
	179
	180	usec = now(clock_boottime_or_monotonic()) + (usec_t) timeout_ms * USEC_PER_MSEC + USEC_PER_MSEC - 1;
	181
	182	if (g->timer) {
	183	if (sd_event_source_set_time(g->timer, usec) < 0)
	184	return -1;
	185
	186	if (sd_event_source_set_enabled(g->timer, SD_EVENT_ONESHOT) < 0)
	187	return -1;
	188	} else {
	189	if (sd_event_add_time(g->event, &g->timer, clock_boottime_or_monotonic(), usec, 0, curl_glue_on_timer, g) < 0)
	190	return -1;
	191
edfd706d	192	(void) sd_event_source_set_description(g->timer, "curl-timer");
72648326 LP	193	}
	194
	195	return 0;
	196	}
	197
	198	CurlGlue curl_glue_unref(CurlGlue g) {
	199	sd_event_source *io;
	200
	201	if (!g)
	202	return NULL;
	203
	204	if (g->curl)
	205	curl_multi_cleanup(g->curl);
	206
	207	while ((io = hashmap_steal_first(g->ios))) {
	208	int fd;
	209
	210	fd = sd_event_source_get_io_fd(io);
	211	assert(fd >= 0);
	212
23e096cc	213	hashmap_remove(g->translate_fds, FD_TO_PTR(fd));
72648326 LP	214
	215	safe_close(fd);
	216	sd_event_source_unref(io);
	217	}
	218
	219	hashmap_free(g->ios);
	220
	221	sd_event_source_unref(g->timer);
	222	sd_event_unref(g->event);
6b430fdb	223	return mfree(g);
72648326 LP	224	}
	225
	226	int curl_glue_new(CurlGlue *glue, sd_event event) {
	227	_cleanup_(curl_glue_unrefp) CurlGlue *g = NULL;
0d94088e YW	228	_cleanup_(curl_multi_cleanupp) CURL *c = NULL;
0d94088e YW	229	_cleanup_(sd_event_unrefp) sd_event *e = NULL;
72648326 LP	230	int r;
72648326 LP	231
72648326	232	if (event)
0d94088e	233	e = sd_event_ref(event);
72648326	234	else {
0d94088e	235	r = sd_event_default(&e);
72648326 LP	236	if (r < 0)
	237	return r;
	238	}
	239
0d94088e YW	240	c = curl_multi_init();
0d94088e YW	241	if (!c)
72648326 LP	242	return -ENOMEM;
72648326 LP	243
0d94088e YW	244	g = new(CurlGlue, 1);
	245	if (!g)
	246	return -ENOMEM;
	247
	248	*g = (CurlGlue) {
	249	.event = TAKE_PTR(e),
	250	.curl = TAKE_PTR(c),
	251	};
	252
72648326 LP	253	if (curl_multi_setopt(g->curl, CURLMOPT_SOCKETDATA, g) != CURLM_OK)
	254	return -EINVAL;
	255
	256	if (curl_multi_setopt(g->curl, CURLMOPT_SOCKETFUNCTION, curl_glue_socket_callback) != CURLM_OK)
	257	return -EINVAL;
	258
	259	if (curl_multi_setopt(g->curl, CURLMOPT_TIMERDATA, g) != CURLM_OK)
	260	return -EINVAL;
	261
	262	if (curl_multi_setopt(g->curl, CURLMOPT_TIMERFUNCTION, curl_glue_timer_callback) != CURLM_OK)
	263	return -EINVAL;
	264
1cc6c93a	265	*glue = TAKE_PTR(g);
72648326 LP	266
	267	return 0;
	268	}
	269
	270	int curl_glue_make(CURL *ret, const char url, void *userdata) {
c3e65800	271	_cleanup_(curl_easy_cleanupp) CURL *c = NULL;
72648326	272	const char *useragent;
72648326 LP	273
	274	assert(ret);
	275	assert(url);
	276
	277	c = curl_easy_init();
	278	if (!c)
	279	return -ENOMEM;
	280
	281	/* curl_easy_setopt(c, CURLOPT_VERBOSE, 1L); */
	282
c3e65800 YW	283	if (curl_easy_setopt(c, CURLOPT_URL, url) != CURLE_OK)
c3e65800 YW	284	return -EIO;
72648326	285
c3e65800 YW	286	if (curl_easy_setopt(c, CURLOPT_PRIVATE, userdata) != CURLE_OK)
c3e65800 YW	287	return -EIO;
72648326	288
681bd2c5	289	useragent = strjoina(program_invocation_short_name, "/" GIT_VERSION);
c3e65800 YW	290	if (curl_easy_setopt(c, CURLOPT_USERAGENT, useragent) != CURLE_OK)
c3e65800 YW	291	return -EIO;
72648326	292
c3e65800 YW	293	if (curl_easy_setopt(c, CURLOPT_FOLLOWLOCATION, 1L) != CURLE_OK)
c3e65800 YW	294	return -EIO;
72648326	295
67577508	296	*ret = TAKE_PTR(c);
72648326	297	return 0;
72648326 LP	298	}
	299
	300	int curl_glue_add(CurlGlue g, CURL c) {
	301	assert(g);
	302	assert(c);
	303
	304	if (curl_multi_add_handle(g->curl, c) != CURLM_OK)
	305	return -EIO;
	306
	307	return 0;
	308	}
	309
	310	void curl_glue_remove_and_free(CurlGlue g, CURL c) {
	311	assert(g);
	312
	313	if (!c)
	314	return;
	315
	316	if (g->curl)
	317	curl_multi_remove_handle(g->curl, c);
	318
	319	curl_easy_cleanup(c);
	320	}
	321
	322	struct curl_slist curl_slist_new(const char first, ...) {
	323	struct curl_slist *l;
	324	va_list ap;
	325
	326	if (!first)
	327	return NULL;
	328
	329	l = curl_slist_append(NULL, first);
	330	if (!l)
	331	return NULL;
	332
	333	va_start(ap, first);
	334
	335	for (;;) {
	336	struct curl_slist *n;
	337	const char *i;
	338
	339	i = va_arg(ap, const char*);
	340	if (!i)
	341	break;
	342
	343	n = curl_slist_append(l, i);
	344	if (!n) {
	345	va_end(ap);
	346	curl_slist_free_all(l);
	347	return NULL;
	348	}
	349
	350	l = n;
	351	}
	352
	353	va_end(ap);
	354	return l;
	355	}
	356
	357	int curl_header_strdup(const void contents, size_t sz, const char field, char **value) {
d27b725a	358	const char *p;
72648326 LP	359	char *s;
72648326 LP	360
21224070	361	p = memory_startswith_no_case(contents, sz, field);
d27b725a	362	if (!p)
72648326 LP	363	return 0;
72648326 LP	364
d27b725a	365	sz -= p - (const char*) contents;
72648326 LP	366
	367	if (memchr(p, 0, sz))
	368	return 0;
	369
5238e957	370	/* Skip over preceding whitespace */
72648326 LP	371	while (sz > 0 && strchr(WHITESPACE, p[0])) {
	372	p++;
	373	sz--;
	374	}
	375
13e785f7	376	/* Truncate trailing whitespace */
72648326 LP	377	while (sz > 0 && strchr(WHITESPACE, p[sz-1]))
	378	sz--;
	379
	380	s = strndup(p, sz);
	381	if (!s)
	382	return -ENOMEM;
	383
	384	*value = s;
	385	return 1;
	386	}
90199220	387
5fa89b2c	388	int curl_parse_http_time(const char t, usec_t ret) {
e520e0fc	389	_cleanup_(freelocalep) locale_t loc = (locale_t) 0;
0193ad26	390	const char *e;
90199220 LP	391	struct tm tm;
	392	time_t v;
	393
	394	assert(t);
	395	assert(ret);
	396
0193ad26 CR	397	loc = newlocale(LC_TIME_MASK, "C", (locale_t) 0);
	398	if (loc == (locale_t) 0)
	399	return -errno;
	400
	401	/* RFC822 */
	402	e = strptime_l(t, "%a, %d %b %Y %H:%M:%S %Z", &tm, loc);
	403	if (!e \|\| *e != 0)
	404	/* RFC 850 */
	405	e = strptime_l(t, "%A, %d-%b-%y %H:%M:%S %Z", &tm, loc);
	406	if (!e \|\| *e != 0)
	407	/* ANSI C */
	408	e = strptime_l(t, "%a %b %d %H:%M:%S %Y", &tm, loc);
0193ad26 CR	409	if (!e \|\| *e != 0)
0193ad26 CR	410	return -EINVAL;
90199220	411
0193ad26	412	v = timegm(&tm);
90199220 LP	413	if (v == (time_t) -1)
	414	return -EINVAL;
	415
5fa89b2c	416	ret = (usec_t) v USEC_PER_SEC;
90199220 LP	417	return 0;
90199220 LP	418	}