From cce9100076426aea45e90fc26f12c8c546c5f586 Mon Sep 17 00:00:00 2001 From: octo Date: Sat, 28 Jan 2006 10:21:31 +0000 Subject: [PATCH] Added config options `host' and `port' to the `hddtemp' plugin. --- src/hddtemp.c | 121 +++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 96 insertions(+), 25 deletions(-) diff --git a/src/hddtemp.c b/src/hddtemp.c index cfa7b8ff..f77c0305 100644 --- a/src/hddtemp.c +++ b/src/hddtemp.c @@ -24,14 +24,17 @@ #include "collectd.h" #include "common.h" #include "plugin.h" +#include "configfile.h" #define MODULE_NAME "hddtemp" +#include #include #include #include #include /* for basename */ +#if 0 /* LOCALHOST_ADDR The ip address 127.0.0.1, as a 32 bit. */ #define LOCALHOST_ADDR 0x7F000001 @@ -39,6 +42,10 @@ /* HDDTEMP_PORT The tcp port the hddtemp daemon is listening on. */ #define HDDTEMP_PORT 7634 +#endif + +#define HDDTEMP_DEF_HOST "127.0.0.1" +#define HDDTEMP_DEF_PORT 7634 /* BUFFER_SIZE Size of the buffer we use to receive from the hddtemp daemon. */ @@ -53,6 +60,14 @@ static char *ds_def[] = }; static int ds_num = 1; +static char *config_keys[] = +{ + "Host", + "Port", + NULL +}; +static int config_keys_num = 2; + typedef struct hddname { int major; @@ -62,6 +77,8 @@ typedef struct hddname } hddname_t; static hddname_t *first_hddname = NULL; +static char *hddtemp_host = NULL; +static int hddtemp_port = 0; /* * NAME @@ -88,59 +105,112 @@ static hddname_t *first_hddname = NULL; static int hddtemp_query_daemon (char *buffer, int buffer_size) { int sock; - ssize_t size; - const struct sockaddr_in addr = + ssize_t status; + int buffer_fill; + + char *host; + int port; + + struct hostent *srv_ent; + struct sockaddr_in srv_addr; + + host = hddtemp_host; + if (host == NULL) + host = HDDTEMP_DEF_HOST; + + port = hddtemp_port; + if (port == 0) + port = HDDTEMP_DEF_PORT; + + /* + * Resolve `host' address and set up `srv_addr' + */ + memset (&srv_addr, '\0', sizeof (srv_addr)); + + if ((srv_ent = gethostbyname (host)) == NULL) { - AF_INET, /* sin_family */ - htons(HDDTEMP_PORT), /* sin_port */ - { /* sin_addr */ - htonl(LOCALHOST_ADDR), /* s_addr */ - } - }; + syslog (LOG_WARNING, "hddtemp: Could not resolve hostname `%s'", + host); + return (-1); + } + + memcpy (&srv_addr.sin_addr.s_addr, srv_ent->h_addr, srv_ent->h_length); + srv_addr.sin_port = htons (port); + srv_addr.sin_family = AF_INET; /* create our socket descriptor */ if ((sock = socket (PF_INET, SOCK_STREAM, 0)) < 0) { - syslog (LOG_ERR, "hddtemp: could not create socket: %s", strerror (errno)); + syslog (LOG_ERR, "hddtemp: could not create socket: %s", + strerror (errno)); return (-1); } /* connect to the hddtemp daemon */ - if (connect (sock, (const struct sockaddr *) &addr, sizeof (addr))) + if (connect (sock, (struct sockaddr *) &srv_addr, sizeof (srv_addr))) { - syslog (LOG_ERR, "hddtemp: Could not connect to the hddtemp daemon: %s", strerror (errno)); + syslog (LOG_ERR, "hddtemp: Could not connect to the hddtemp " + "daemon at %s:%i: %s", + host, port, strerror (errno)); close (sock); return (-1); } /* receive data from the hddtemp daemon */ memset (buffer, '\0', buffer_size); - size = recv (sock, buffer, buffer_size, 0); - if (size >= buffer_size) + buffer_fill = 0; + while ((status = read (sock, buffer + buffer_fill, buffer_size - buffer_fill)) != 0) + { + if (status == -1) + { + if ((errno == EAGAIN) || (errno == EINTR)) + continue; + + syslog (LOG_ERR, "hddtemp: Error reading from socket: %s", + strerror (errno)); + return (-1); + } + buffer_fill += status; + + if (buffer_fill >= buffer_size) + break; + } + + if (buffer_fill >= buffer_size) { + buffer[buffer_size - 1] = '\0'; syslog (LOG_WARNING, "hddtemp: Message from hddtemp has been truncated."); - close (sock); - return (-1); } - /* FIXME: Since the server closes the connection this returns zero. At - * least my machine does. -octo */ - /* - else if (size == 0) + else if (buffer_fill == 0) { - syslog (LOG_WARNING, "hddtemp: Peer has unexpectedly shut down the socket. Buffer: `%s'", buffer); + syslog (LOG_WARNING, "hddtemp: Peer has unexpectedly shut down the socket. " + "Buffer: `%s'", buffer); close (sock); return (-1); } - */ - else if (size < 0) + + close (sock); + return (0); +} + +static int hddtemp_config (char *key, char *value) +{ + if (strcasecmp (key, "host") == 0) + { + if (hddtemp_host != NULL) + free (hddtemp_host); + hddtemp_host = strdup (value); + } + else if (strcasecmp (key, "port") == 0) + { + hddtemp_port = atoi (value); + } + else { - syslog (LOG_ERR, "hddtemp: Could not receive from the hddtemp daemon: %s", strerror (errno)); - close (sock); return (-1); } - close (sock); return (0); } @@ -364,6 +434,7 @@ static void hddtemp_read (void) void module_register (void) { plugin_register (MODULE_NAME, hddtemp_init, hddtemp_read, hddtemp_write); + cf_register (MODULE_NAME, hddtemp_config, config_keys, config_keys_num); } #undef MODULE_NAME -- 2.30.2