From 8211954fc3390c0fa19cca788b03336a37aa9dc0 Mon Sep 17 00:00:00 2001 From: Andre Noll Date: Sun, 9 Sep 2007 01:17:50 +0200 Subject: [PATCH] Make afs commands work. This required a rewrite of send_callback_request(). The patch also includes the rename of get_socket() to get_stream_socket() which takes the new domain parameter, so that it may be used for both AF_INET and AF_UNIX sockets. --- afs.c | 406 ++++++++++-------------------------------------- aft.c | 5 +- attribute.c | 6 +- audioc.c | 3 +- blob.c | 9 +- client_common.c | 2 +- http_recv.c | 3 +- net.c | 8 +- net.h | 4 +- server.c | 2 +- server.ggo | 8 + 11 files changed, 117 insertions(+), 339 deletions(-) diff --git a/afs.c b/afs.c index 0a3d1038..364eb7f3 100644 --- a/afs.c +++ b/afs.c @@ -1,11 +1,19 @@ +/* + * Copyright (C) 1997-2007 Andre Noll + * + * Licensed under the GPL v2. For licencing details see COPYING. + */ + +/** \file afs.c Paraslash's audio file selector. */ + +#include "server.cmdline.h" #include "para.h" #include "afh.h" +#include "server.h" #include "error.h" #include /* readdir() */ #include #include -//#include - #include "net.h" #include "afs.h" #include "ipc.h" @@ -15,7 +23,7 @@ #include "signal.h" #include "fd.h" -/** \file afs.c Paraslash's audio file selector. */ +extern uint32_t afs_socket_cookie; /** * Compare two osl objects of string type. @@ -169,89 +177,92 @@ static int result_mutex; * \param result Callback result will be stored here. * * This function creates a shared memory area, copies the buffer pointed to by - * \a buf to that area and notifies the parent process that \a f should be - * called ASAP. It provides proper locking via semaphores to protect against - * concurent access to the shared memory area and against concurrent access by - * another child process that asks to call the same function. + * \a buf to that area and notifies the afs process that \a f should be + * called ASAP. * - * \return Negative, if the shared memory area could not be set up. The return - * value of the callback function otherwise. + * \return Negative, on errors, the return value of the callback function + * otherwise. * - * \sa shm_new(), shm_attach(), shm_detach(), mutex_lock(), mutex_unlock(), - * shm_destroy(), struct callback_data, send_option_arg_callback_request(), - * send_standard_callback_request(). + * \sa send_option_arg_callback_request(), send_standard_callback_request(). */ int send_callback_request(callback_function *f, struct osl_object *query, struct osl_object *result) { - struct callback_data cbd = {.handler = f}; - int ret; - void *query_sma; + struct callback_query *cq; + struct callback_result *cr; + int ret, fd = -1, query_shmid, result_shmid; + void *query_shm, *result_shm; + char buf[sizeof(afs_socket_cookie) + sizeof(int)]; +// char *tmpsocket_name; + struct sockaddr_un unix_addr; assert(query->data && query->size); - ret = shm_new(query->size); + ret = shm_new(query->size + sizeof(*cq)); if (ret < 0) return ret; - cbd.query_shmid = ret; - cbd.query_size = query->size; - ret = shm_attach(cbd.query_shmid, ATTACH_RW, &query_sma); + query_shmid = ret; + ret = shm_attach(query_shmid, ATTACH_RW, &query_shm); + if (ret < 0) + goto out; + cq = query_shm; + cq->handler = f; + cq->query_size = query->size; + + memcpy(query_shm + sizeof(*cq), query->data, query->size); + ret = shm_detach(query_shm); if (ret < 0) goto out; - memcpy(query_sma, query->data, query->size); - ret = shm_detach(query_sma); + + *(uint32_t *) buf = afs_socket_cookie; + *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid; + + ret = get_stream_socket(PF_UNIX); if (ret < 0) goto out; - /* prevent other children from interacting */ - mutex_lock(child_mutex); - /* prevent parent from messing with shm_callback_data. */ - mutex_lock(callback_mutex); - /* all three mutexes are locked, set parameters for callback */ - *shm_callback_data = cbd; - /* unblock parent */ - mutex_unlock(callback_mutex); - kill(getppid(), SIGUSR1); /* wake up parent */ - /* - * At this time only the parent can run. It will execute our callback - * and unlock the result_mutex when ready to indicate that the child - * may use the result. So let's sleep on this mutex. - */ - mutex_lock(result_mutex); - /* No need to aquire the callback mutex again */ - ret = shm_callback_data->sma_ret; - if (ret < 0) /* sma problem, callback might not have been executed */ - goto unlock_child_mutex; - if (shm_callback_data->result_shmid >= 0) { /* parent provided a result */ - void *sma; - ret = shm_attach(shm_callback_data->result_shmid, ATTACH_RO, - &sma); - if (ret >= 0) { - if (result) { /* copy result */ - result->size = shm_callback_data->result_size; - result->data = para_malloc(result->size); - memcpy(result->data, sma, result->size); - ret = shm_detach(sma); - if (ret < 0) - PARA_ERROR_LOG("can not detach result\n"); - } else - PARA_WARNING_LOG("no result pointer\n"); - } else - PARA_ERROR_LOG("attach result failed: %d\n", ret); - if (shm_destroy(shm_callback_data->result_shmid) < 0) - PARA_ERROR_LOG("destroy result failed\n"); - } else { /* no result from callback */ - if (result) { - PARA_WARNING_LOG("callback has no result\n"); - result->data = NULL; - result->size = 0; - } + fd = ret; + ret = init_unix_addr(&unix_addr, conf.afs_socket_arg); + if (ret < 0) + goto out; + ret = -E_CONNECT; + if (connect(fd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) /* FIXME: Use para_connect() */ + goto out; + ret = send_bin_buffer(fd, buf, sizeof(buf)); + PARA_NOTICE_LOG("bin buffer ret: %d\n", ret); + if (ret < 0) + goto out; + ret = recv_bin_buffer(fd, buf, sizeof(buf)); + PARA_NOTICE_LOG("ret: %d\n", ret); + if (ret < 0) + goto out; + if (ret != sizeof(int)) { + ret = -E_RECV; + goto out; } - ret = shm_callback_data->callback_ret; -unlock_child_mutex: - /* give other children a chance */ - mutex_unlock(child_mutex); + ret = *(int *) buf; + PARA_NOTICE_LOG("result_shmid: %d\n", ret); + if (ret <= 0) + goto out; + result_shmid = ret; + ret = shm_attach(result_shmid, ATTACH_RO, &result_shm); + if (ret >= 0) { + assert(result); + cr = result_shm; + result->size = cr->result_size; + result->data = para_malloc(result->size); + memcpy(result->data, result_shm + sizeof(*cr), result->size); + ret = shm_detach(result_shm); + if (ret < 0) + PARA_ERROR_LOG("can not detach result\n"); + } else + PARA_ERROR_LOG("attach result failed: %d\n", ret); + if (shm_destroy(result_shmid) < 0) + PARA_ERROR_LOG("destroy result failed\n"); + ret = 1; out: - if (shm_destroy(cbd.query_shmid) < 0) + if (shm_destroy(query_shmid) < 0) PARA_ERROR_LOG("%s\n", "shm destroy error"); + if (fd >= 0) + close(fd); PARA_DEBUG_LOG("callback_ret: %d\n", ret); return ret; } @@ -488,7 +499,7 @@ static enum play_mode init_admissible_files(void) static int setup_command_socket_or_die(void) { int ret; - char *socket_name = "/tmp/afs_command_socket"; + char *socket_name = conf.afs_socket_arg; struct sockaddr_un unix_addr; unlink(socket_name); @@ -586,7 +597,7 @@ static int call_callback(int fd, int query_shmid) struct osl_object query, result = {.data = NULL}; int result_shmid = -1, ret, ret2; - ret = shm_attach(query_shmid, ATTACH_RO, &query_shm); + ret = shm_attach(query_shmid, ATTACH_RW, &query_shm); if (ret < 0) goto out; cq = query_shm; @@ -617,7 +628,7 @@ static int call_callback(int fd, int query_shmid) ret = result_shmid; out: free(result.data); - ret2 = send_bin_buffer(fd, (char *)ret, sizeof(int)); + ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int)); if (ret < 0 || ret2 < 0) { if (result_shmid >= 0) if (shm_destroy(result_shmid) < 0) @@ -648,9 +659,10 @@ static void command_post_select(struct sched *s, struct task *t) * and para_server. */ fd = t->ret; - t->ret = recv_bin_buffer(ct->fd, buf, sizeof(buf)); + /* FIXME: This is easily dosable (peer doesn't send data) */ + t->ret = recv_bin_buffer(fd, buf, sizeof(buf)); if (t->ret < 0) { - PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret)); + PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret); t->ret = 1; goto out; } @@ -823,249 +835,3 @@ int com_init(__a_unused int fd, int argc, const char **argv) } return 1; } - -#if 0 -/** Describes a command of para_server. */ -struct command { - /** The name of the command. */ - const char *name; - /** The handler function. */ - int (*handler)(int fd, int argc, const char **argv); -}; - -static struct command afs_cmds[] = { -{ - .name = "add", - .handler = com_add, -}, -{ - .name = "addlyr", - .handler = com_addlyr, -}, -{ - .name = "addimg", - .handler = com_addimg, -}, -{ - .name = "addmood", - .handler = com_addmood, -}, -{ - .name = "addpl", - .handler = com_addpl, -}, -{ - .name = "catlyr", - .handler = com_catlyr, -}, -{ - .name = "catimg", - .handler = com_catimg, -}, -{ - .name = "mvimg", - .handler = com_mvimg, -}, -{ - .name = "mvlyr", - .handler = com_mvlyr, -}, -{ - .name = "mvmood", - .handler = com_mvmood, -}, -{ - .name = "mvpl", - .handler = com_mvpl, -}, -{ - .name = "catmood", - .handler = com_catmood, -}, -{ - .name = "catpl", - .handler = com_catpl, -}, -{ - .name = "rmatt", - .handler = com_rmatt, -}, -{ - .name = "init", - .handler = com_init, -}, -{ - .name = "lsatt", - .handler = com_lsatt, -}, -{ - .name = "ls", - .handler = com_afs_ls, -}, -{ - .name = "lslyr", - .handler = com_lslyr, -}, -{ - .name = "lsimg", - .handler = com_lsimg, -}, -{ - .name = "lsmood", - .handler = com_lsmood, -}, -{ - .name = "lspl", - .handler = com_lspl, -}, -{ - .name = "setatt", - .handler = com_setatt, -}, -{ - .name = "addatt", - .handler = com_addatt, -}, -{ - .name = "rm", - .handler = com_afs_rm, -}, -{ - .name = "rmlyr", - .handler = com_rmlyr, -}, -{ - .name = "rmimg", - .handler = com_rmimg, -}, -{ - .name = "rmmood", - .handler = com_rmmood, -}, -{ - .name = "rmpl", - .handler = com_rmpl, -}, -{ - .name = "touch", - .handler = com_touch, -}, -{ - .name = NULL, -} -}; - -static void call_callback(void) -{ - struct osl_object query, result = {.data = NULL}; - int ret, ret2; - - shm_callback_data->result_shmid = -1; /* no result */ - ret = shm_attach(shm_callback_data->query_shmid, ATTACH_RW, - &query.data); - if (ret < 0) - goto out; - query.size = shm_callback_data->query_size; - shm_callback_data->callback_ret = shm_callback_data->handler(&query, - &result); - if (result.data && result.size) { - void *sma; - ret = shm_new(result.size); - if (ret < 0) - goto detach_query; - shm_callback_data->result_shmid = ret; - shm_callback_data->result_size = result.size; - ret = shm_attach(shm_callback_data->result_shmid, ATTACH_RW, &sma); - if (ret < 0) - goto destroy_result; - memcpy(sma, result.data, result.size); - ret = shm_detach(sma); - if (ret < 0) { - PARA_ERROR_LOG("detach result failed\n"); - goto destroy_result; - } - } - ret = 1; - goto detach_query; -destroy_result: - if (shm_destroy(shm_callback_data->result_shmid) < 0) - PARA_ERROR_LOG("destroy result failed\n"); - shm_callback_data->result_shmid = -1; -detach_query: - free(result.data); - ret2 = shm_detach(query.data); - if (ret2 < 0) { - PARA_ERROR_LOG("detach query failed\n"); - if (ret >= 0) - ret = ret2; - } -out: - if (ret < 0) - PARA_ERROR_LOG("sma error %d\n", ret); - shm_callback_data->sma_ret = ret; - shm_callback_data->handler = NULL; - mutex_unlock(result_mutex); /* wake up child */ -} - -static int got_sigchld; -static void server_loop(int child_pid) -{ -// int status; - - PARA_DEBUG_LOG("server pid: %d, child pid: %d\n", - getpid(), child_pid); - for (;;) { - mutex_lock(callback_mutex); - if (shm_callback_data->handler) - call_callback(); - mutex_unlock(callback_mutex); - usleep(100); - if (!got_sigchld) - continue; - mutex_destroy(result_mutex); - mutex_destroy(callback_mutex); - mutex_destroy(child_mutex); - afs_shutdown(OSL_MARK_CLEAN); - exit(EXIT_SUCCESS); - } -} - -int main(int argc, const char **argv) -{ - int i, ret = -E_AFS_SYNTAX; - - signal(SIGUSR1, dummy); - signal(SIGCHLD, sigchld_handler); - if (argc < 2) - goto out; - ret = setup(); -// ret = afs_init(); - if (ret < 0) { - PARA_EMERG_LOG("afs_init returned %d\n", ret); - exit(EXIT_FAILURE); - } - ret = fork(); - if (ret < 0) { - ret = -E_FORK; - goto out; - } - if (ret) - server_loop(ret); - for (i = 0; cmd[i].name; i++) { - if (strcmp(cmd[i].name, argv[1])) - continue; - ret = cmd[i].handler(1, argc - 1 , argv + 1); - goto out; - - } - PARA_ERROR_LOG("unknown command: %s\n", argv[1]); - ret = -1; -out: - if (ret < 0) - PARA_ERROR_LOG("error %d\n", ret); - else - PARA_DEBUG_LOG("%s", "success\n"); - afs_shutdown(0); - return ret < 0? EXIT_FAILURE : EXIT_SUCCESS; -} -#endif diff --git a/aft.c b/aft.c index 06ff805c..e682c203 100644 --- a/aft.c +++ b/aft.c @@ -4,6 +4,7 @@ #include #include "afh.h" #include "afs.h" +#include "net.h" #include "string.h" int mp3_get_file_info(char *map, size_t numbytes, @@ -1029,7 +1030,7 @@ out: * full list: list everything, including afsi, afhi, atts as clear text * * */ -int com_afs_ls(__a_unused int fd, int argc, const char **argv) +int com_afs_ls(int fd, int argc, const char **argv) { int i, ret; unsigned flags = 0; @@ -1135,7 +1136,7 @@ int com_afs_ls(__a_unused int fd, int argc, const char **argv) ret = send_option_arg_callback_request(&query, opts.num_patterns, argv + i, com_ls_callback, &ls_output); if (ret >= 0 && ls_output.data) { - printf("%s\n", (char *)ls_output.data); + send_buffer(fd, (char *)ls_output.data); free(ls_output.data); } return ret; diff --git a/attribute.c b/attribute.c index d4a0bfaf..86fc36d7 100644 --- a/attribute.c +++ b/attribute.c @@ -3,6 +3,7 @@ #include "afh.h" #include "afs.h" #include "string.h" +#include "net.h" static void *attribute_table; static int greatest_att_bitnum; @@ -94,17 +95,18 @@ static int log_attribute(struct osl_row *row, void *private_data) if (ret < 0) return ret; if (!(pld->flags & LAA_FLAG_LONG)) { - printf("%s\n", (char *)name_obj.data); + send_buffer(pld->fd, (char *)name_obj.data); return 1; } ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &bitnum_obj); if (ret < 0) return ret; - printf("%u\t%s\n", *(unsigned char*)bitnum_obj.data, + send_va_buffer(pld->fd, "%u\t%s\n", *(unsigned char*)bitnum_obj.data, (char *)name_obj.data); return 1; } +/* FIXME: Need callback */ int com_lsatt(int fd, int argc, const char **argv) { struct private_laa_data pld = {.fd = fd, .flags = 0}; diff --git a/audioc.c b/audioc.c index 42372cae..d98ab460 100644 --- a/audioc.c +++ b/audioc.c @@ -105,6 +105,7 @@ int main(int argc, char *argv[]) ret = create_local_socket(tmpsocket_name, &unix_addr, S_IRUSR | S_IWUSR); unlink(tmpsocket_name); + free(tmpsocket_name); if (ret < 0) goto out; fd = ret; @@ -112,7 +113,7 @@ int main(int argc, char *argv[]) if (init_unix_addr(&unix_addr, socket_name) < 0) goto out; ret = -E_AUDIOC_CONNECT; - if (connect(fd, (struct sockaddr *)&unix_addr, UNIX_PATH_MAX) < 0) + if (connect(fd, (struct sockaddr *)&unix_addr, UNIX_PATH_MAX) < 0) /* FIXME: Use para_connect() */ goto out; ret = send_cred_buffer(fd, args); if (ret < 0) diff --git a/blob.c b/blob.c index b970ab65..eca3c563 100644 --- a/blob.c +++ b/blob.c @@ -3,6 +3,7 @@ #include "afh.h" #include "afs.h" #include "string.h" +#include "net.h" /** \file blob.c Macros and functions for blob handling. */ @@ -105,7 +106,7 @@ int com_lsblob_callback(struct osl_table *table, return ret; } -static int com_lsblob(callback_function *f, __a_unused int fd, int argc, const char **argv) +static int com_lsblob(callback_function *f, int fd, int argc, const char **argv) { struct com_lsblob_options clbo = {.flags = 0}; struct osl_object query = {.data = &clbo, .size = sizeof(clbo)}, @@ -138,7 +139,7 @@ static int com_lsblob(callback_function *f, __a_unused int fd, int argc, const c ret = send_option_arg_callback_request(&query, argc - i, argv + i, f, &ls_output); if (ret >= 0 && ls_output.data) - printf("%s\n", (char *)ls_output.data); + send_buffer(fd, (char *)ls_output.data); free(ls_output.data); return ret; } @@ -161,7 +162,7 @@ static int com_catblob_callback(struct osl_table *table, memcpy(output->data, obj.data, obj.size); return osl_close_disk_object(&obj); } -static int com_catblob(callback_function *f, __a_unused int fd, int argc, +static int com_catblob(callback_function *f, int fd, int argc, const char **argv) { struct osl_object cat_output = {.data = NULL}; @@ -173,7 +174,7 @@ static int com_catblob(callback_function *f, __a_unused int fd, int argc, return -E_BLOB_SYNTAX; ret = send_standard_callback_request(1, argv + 1, f, &cat_output); if (ret >= 0 && cat_output.data) - printf("%s\n", (char *)cat_output.data); + ret = send_buffer(fd, (char *)cat_output.data); free(cat_output.data); return ret; diff --git a/client_common.c b/client_common.c index 1b53f705..5a555469 100644 --- a/client_common.c +++ b/client_common.c @@ -84,7 +84,7 @@ static int client_connect(struct private_client_data *pcd) if (ret < 0) return ret; /* get new socket */ - ret = get_socket(); + ret = get_stream_socket(AF_INET); if (ret < 0) return ret; pcd->fd = ret; diff --git a/http_recv.c b/http_recv.c index 56783b72..05f452e6 100644 --- a/http_recv.c +++ b/http_recv.c @@ -175,8 +175,7 @@ static int http_recv_open(struct receiver_node *rn) ret = get_host_info(conf->host_arg, &he); if (ret < 0) goto err_out; - /* get new socket */ - ret = get_socket(); + ret = get_stream_socket(AF_INET); if (ret < 0) goto err_out; phd->fd = ret; diff --git a/net.c b/net.c index bc7d234b..c5f33c82 100644 --- a/net.c +++ b/net.c @@ -292,11 +292,11 @@ int get_host_info(char *host, struct hostent **ret) * * \sa socket(2) */ -int get_socket(void) +int get_stream_socket(int domain) { int socket_fd; - if ((socket_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) + if ((socket_fd = socket(domain, SOCK_STREAM, 0)) == -1) return -E_SOCKET; return socket_fd; } @@ -542,7 +542,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size) * \return The file descriptor of the created socket, negative * on errors. * - * \sa get_socket() + * \sa get_stream_socket() * \sa setsockopt(2) * \sa bind(2) * \sa listen(2) @@ -550,7 +550,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size) int init_tcp_socket(int port) { struct sockaddr_in my_addr; - int fd, ret = get_socket(); + int fd, ret = get_stream_socket(AF_INET); if (ret < 0) return ret; diff --git a/net.h b/net.h index 1695504c..ddc25095 100644 --- a/net.h +++ b/net.h @@ -22,9 +22,9 @@ typedef void crypt_function(unsigned long len, #include /* hostent */ int get_host_info(char *host, struct hostent **ret); -int get_socket(void); +int get_stream_socket(int domain); void init_sockaddr(struct sockaddr_in*, int, const struct hostent*); -int para_connect(int, struct sockaddr_in *); +int para_connect(int fd, struct sockaddr_in *their_addr); int send_buffer(int, const char *); int send_bin_buffer(int, const char *, size_t); __printf_2_3 int send_va_buffer(int fd, const char *fmt, ...); diff --git a/server.c b/server.c index a63aeefc..90f8cd53 100644 --- a/server.c +++ b/server.c @@ -348,7 +348,7 @@ out: exit(EXIT_FAILURE); } -static uint32_t afs_socket_cookie; +uint32_t afs_socket_cookie; static int afs_socket; pid_t afs_pid; diff --git a/server.ggo b/server.ggo index 4f6e05b2..dedb0e86 100644 --- a/server.ggo +++ b/server.ggo @@ -133,6 +133,14 @@ option "selector" S optional +option "afs_socket" s +#~~~~~~~~~~~~~~~~~~~~ + +"Command socket for the audio file selector" + + string typestr="path" + default="/var/paraslash/afs_command_socket" + optional section "mysql selector" #~~~~~~~~~~~~~~~~~~~~~~~ -- 2.39.2