static void uwsgi_plugin_parse_section(char *filename) { size_t s_len = 0; char *buf = uwsgi_elf_section(filename, "uwsgi", &s_len); if (buf) { char *ctx = NULL; char *p = strtok_r(buf, "\n", &ctx); while (p) { char *equal = strchr(p, '='); if (equal) { *equal = 0; if (!strcmp(p, "requires")) { uwsgi_load_plugin(-1, equal + 1, NULL); } } p = strtok_r(NULL, "\n", &ctx); } free(buf); } }
/* extremely complex function for reading resources (files, url...) need a lot of refactoring... */ char *uwsgi_open_and_read(char *url, size_t *size, int add_zero, char *magic_table[]) { int fd; struct stat sb; char *buffer = NULL; char byte; ssize_t len; char *uri, *colon; char *domain; char *ip; int body = 0; char *magic_buf; // stdin ? if (!strcmp(url, "-")) { buffer = uwsgi_read_fd(0, size, add_zero); } // fd ? else if (!strncmp("fd://", url, 5)) { fd = atoi(url + 5); buffer = uwsgi_read_fd(fd, size, add_zero); } // exec ? else if (!strncmp("exec://", url, 5)) { int cpipe[2]; if (pipe(cpipe)) { uwsgi_error("pipe()"); exit(1); } uwsgi_run_command(url + 7, NULL, cpipe[1]); buffer = uwsgi_read_fd(cpipe[0], size, add_zero); close(cpipe[0]); close(cpipe[1]); } // http url ? else if (!strncmp("http://", url, 7)) { domain = url + 7; uri = strchr(domain, '/'); if (!uri) { uwsgi_log("invalid http url\n"); exit(1); } uri[0] = 0; uwsgi_log("domain: %s\n", domain); colon = uwsgi_get_last_char(domain, ':'); if (colon) { colon[0] = 0; } ip = uwsgi_resolve_ip(domain); if (!ip) { uwsgi_log("unable to resolve address %s\n", domain); exit(1); } if (colon) { colon[0] = ':'; ip = uwsgi_concat2(ip, colon); } else { ip = uwsgi_concat2(ip, ":80"); } fd = uwsgi_connect(ip, 0, 0); if (fd < 0) { exit(1); } free(ip); uri[0] = '/'; len = write(fd, "GET ", 4); len = write(fd, uri, strlen(uri)); len = write(fd, " HTTP/1.0\r\n", 11); len = write(fd, "Host: ", 6); uri[0] = 0; len = write(fd, domain, strlen(domain)); uri[0] = '/'; len = write(fd, "\r\nUser-Agent: uWSGI on ", 23); len = write(fd, uwsgi.hostname, uwsgi.hostname_len); len = write(fd, "\r\n\r\n", 4); int http_status_code_ptr = 0; while (read(fd, &byte, 1) == 1) { if (byte == '\r' && body == 0) { body = 1; } else if (byte == '\n' && body == 1) { body = 2; } else if (byte == '\r' && body == 2) { body = 3; } else if (byte == '\n' && body == 3) { body = 4; } else if (body == 4) { *size = *size + 1; char *tmp = realloc(buffer, *size); if (!tmp) { uwsgi_error("uwsgi_open_and_read()/realloc()"); exit(1); } buffer = tmp; buffer[*size - 1] = byte; } else { body = 0; http_status_code_ptr++; if (http_status_code_ptr == 10) { if (byte != '2') { uwsgi_log("Not usable HTTP response: %cxx\n", byte); if (uwsgi.has_emperor) { exit(UWSGI_EXILE_CODE); } else { exit(1); } } } } } close(fd); if (add_zero) { *size = *size + 1; char *tmp = realloc(buffer, *size); if (!tmp) { uwsgi_error("uwsgi_open_and_read()/realloc()"); exit(1); } buffer = tmp; buffer[*size - 1] = 0; } } else if (!strncmp("emperor://", url, 10)) { if (uwsgi.emperor_fd_config < 0) { uwsgi_log("this is not a vassal instance\n"); exit(1); } ssize_t rlen; *size = 0; struct uwsgi_header uh; size_t remains = 4; char *ptr = (char *) &uh; while(remains) { int ret = uwsgi_waitfd(uwsgi.emperor_fd_config, 5); if (ret <= 0) { uwsgi_log("[uwsgi-vassal] error waiting for config header %s !!!\n", url); exit(1); } rlen = read(uwsgi.emperor_fd_config, ptr, remains); if (rlen <= 0) { uwsgi_log("[uwsgi-vassal] error reading config header from !!!\n", url); exit(1); } ptr+=rlen; remains-=rlen; } remains = uh.pktsize; if (!remains) { uwsgi_log("[uwsgi-vassal] invalid config from %s\n", url); exit(1); } buffer = uwsgi_calloc(remains + add_zero); ptr = buffer; while (remains) { int ret = uwsgi_waitfd(uwsgi.emperor_fd_config, 5); if (ret <= 0) { uwsgi_log("[uwsgi-vassal] error waiting for config %s !!!\n", url); exit(1); } rlen = read(uwsgi.emperor_fd_config, ptr, remains); if (rlen <= 0) { uwsgi_log("[uwsgi-vassal] error reading config from !!!\n", url); exit(1); } ptr+=rlen; remains-=rlen; } *size = uh.pktsize + add_zero; } #ifdef UWSGI_EMBED_CONFIG else if (url[0] == 0) { *size = &UWSGI_EMBED_CONFIG_END - &UWSGI_EMBED_CONFIG; if (add_zero) { *size += 1; } buffer = uwsgi_malloc(*size); memset(buffer, 0, *size); memcpy(buffer, &UWSGI_EMBED_CONFIG, &UWSGI_EMBED_CONFIG_END - &UWSGI_EMBED_CONFIG); } #endif else if (!strncmp("data://", url, 7)) { fd = open(uwsgi.binary_path, O_RDONLY); if (fd < 0) { uwsgi_error_open(uwsgi.binary_path); exit(1); } int slot = atoi(url + 7); if (slot < 0) { uwsgi_log("invalid binary data slot requested\n"); exit(1); } uwsgi_log("requesting binary data slot %d\n", slot); off_t fo = lseek(fd, 0, SEEK_END); if (fo < 0) { uwsgi_error("lseek()"); uwsgi_log("invalid binary data slot requested\n"); exit(1); } int i = 0; uint64_t datasize = 0; for (i = 0; i <= slot; i++) { fo = lseek(fd, -9, SEEK_CUR); if (fo < 0) { uwsgi_error("lseek()"); uwsgi_log("invalid binary data slot requested\n"); exit(1); } ssize_t len = read(fd, &datasize, 8); if (len != 8) { uwsgi_error("read()"); uwsgi_log("invalid binary data slot requested\n"); exit(1); } if (datasize == 0) { uwsgi_log("0 size binary data !!!\n"); exit(1); } fo = lseek(fd, -(datasize + 9), SEEK_CUR); if (fo < 0) { uwsgi_error("lseek()"); uwsgi_log("invalid binary data slot requested\n"); exit(1); } if (i == slot) { *size = datasize; if (add_zero) { *size += 1; } buffer = uwsgi_malloc(*size); memset(buffer, 0, *size); len = read(fd, buffer, datasize); if (len != (ssize_t) datasize) { uwsgi_error("read()"); uwsgi_log("invalid binary data slot requested\n"); exit(1); } } } } else if (!strncmp("sym://", url, 6)) { char *symbol = uwsgi_concat3("_binary_", url + 6, "_start"); void *sym_start_ptr = dlsym(RTLD_DEFAULT, symbol); if (!sym_start_ptr) { uwsgi_log("unable to find symbol %s\n", symbol); exit(1); } free(symbol); symbol = uwsgi_concat3("_binary_", url + 6, "_end"); void *sym_end_ptr = dlsym(RTLD_DEFAULT, symbol); if (!sym_end_ptr) { uwsgi_log("unable to find symbol %s\n", symbol); exit(1); } free(symbol); *size = sym_end_ptr - sym_start_ptr; if (add_zero) { *size += 1; } buffer = uwsgi_malloc(*size); memset(buffer, 0, *size); memcpy(buffer, sym_start_ptr, sym_end_ptr - sym_start_ptr); } #ifdef UWSGI_ELF else if (!strncmp("section://", url, 10)) { size_t s_len = 0; buffer = uwsgi_elf_section(uwsgi.binary_path, url + 10, &s_len); if (!buffer) { uwsgi_log("unable to find section %s in %s\n", url + 10, uwsgi.binary_path); exit(1); } *size = s_len; if (add_zero) *size += 1; } #endif // fallback to file else { fd = open(url, O_RDONLY); if (fd < 0) { uwsgi_error_open(url); exit(1); } if (fstat(fd, &sb)) { uwsgi_error("fstat()"); exit(1); } if (S_ISFIFO(sb.st_mode)) { buffer = uwsgi_read_fd(fd, size, add_zero); close(fd); goto end; } buffer = uwsgi_malloc(sb.st_size + add_zero); len = read(fd, buffer, sb.st_size); if (len != sb.st_size) { uwsgi_error("read()"); exit(1); } close(fd); *size = sb.st_size + add_zero; if (add_zero) buffer[sb.st_size] = 0; } end: if (magic_table) { magic_buf = magic_sub(buffer, *size, size, magic_table); free(buffer); return magic_buf; } return buffer; }