X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fcommon.c;h=974a29eac035afca6a158deafbe4e56bfae2be52;hb=f0c44c295d16ab49ba6e7e36d8ae9aae78e460f4;hp=0b603fa876dcd9b823584fa355bd66087ab5a94b;hpb=a9e8ad509f86d0e2cb5f7ac39da5955c53fe3e60;p=collectd.git diff --git a/src/common.c b/src/common.c index 0b603fa8..974a29ea 100644 --- a/src/common.c +++ b/src/common.c @@ -1,52 +1,52 @@ /** * collectd - src/common.c - * Copyright (C) 2005 Florian octo Forster + * Copyright (C) 2005-2007 Florian octo Forster * - * This program is free software; you can redistribute it and/ - * or modify it under the terms of the GNU General Public Li- - * cence as published by the Free Software Foundation; either - * version 2 of the Licence, or any later version. + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; only version 2 of the License is applicable. * - * This program is distributed in the hope that it will be use- - * ful, but WITHOUT ANY WARRANTY; without even the implied war- - * ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * See the GNU General Public Licence for more details. + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. * - * You should have received a copy of the GNU General Public - * Licence along with this program; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, - * USA. + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Authors: * Florian octo Forster * Niki W. Waibel **/ +#if HAVE_CONFIG_H +# include "config.h" +#endif + #include "common.h" -#include "utils_debug.h" +#include "plugin.h" -extern int operating_mode; +#if HAVE_PTHREAD_H +# include +#endif + +#ifdef HAVE_MATH_H +# include +#endif + +/* for ntohl and htonl */ +#if HAVE_ARPA_INET_H +# include +#endif #ifdef HAVE_LIBKSTAT extern kstat_ctl_t *kc; #endif -#ifdef HAVE_LIBRRD -static char *rra_def[] = -{ - "RRA:AVERAGE:0.2:6:1500", - "RRA:AVERAGE:0.1:180:1680", - "RRA:AVERAGE:0.1:2160:1520", - "RRA:MIN:0.2:6:1500", - "RRA:MIN:0.1:180:1680", - "RRA:MIN:0.1:2160:1520", - "RRA:MAX:0.2:6:1500", - "RRA:MAX:0.1:180:1680", - "RRA:MAX:0.1:2160:1520", - NULL -}; -static int rra_num = 9; -#endif /* HAVE_LIBRRD */ +#if !HAVE_GETPWNAM_R +static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER; +#endif void sstrncpy (char *d, const char *s, int len) { @@ -63,20 +63,52 @@ char *sstrdup (const char *s) if((r = strdup (s)) == NULL) { - DBG ("Not enough memory."); + DEBUG ("Not enough memory."); exit(3); } return (r); } +/* Even though Posix requires "strerror_r" to return an "int", + * some systems (e.g. the GNU libc) return a "char *" _and_ + * ignore the second argument ... -tokkee */ +char *sstrerror (int errnum, char *buf, size_t buflen) +{ + buf[0] = '\0'; +#ifdef STRERROR_R_CHAR_P + { + char *temp; + temp = strerror_r (errnum, buf, buflen); + if (buf[0] == '\0') + { + if ((temp != NULL) && (temp != buf) && (temp[0] != '\0')) + strncpy (buf, temp, buflen); + else + strncpy (buf, "strerror_r did not return " + "an error message", buflen); + buf[buflen - 1] = '\0'; + } + } +#else + if (strerror_r (errnum, buf, buflen) != 0) + { + snprintf (buf, buflen, "Error #%i; " + "Additionally, strerror_r failed.", + errnum); + } +#endif /* STRERROR_R_CHAR_P */ + buf[buflen - 1] = '\0'; + return (buf); +} /* char *sstrerror */ + void *smalloc (size_t size) { void *r; if ((r = malloc (size)) == NULL) { - DBG("Not enough memory."); + DEBUG("Not enough memory."); exit(3); } @@ -96,14 +128,80 @@ void sfree (void **ptr) } #endif +ssize_t sread (int fd, void *buf, size_t count) +{ + char *ptr; + size_t nleft; + ssize_t status; + + ptr = (char *) buf; + nleft = count; + + while (nleft > 0) + { + status = read (fd, (void *) ptr, nleft); + + if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR))) + continue; + + if (status < 0) + return (status); + + if (status == 0) + { + DEBUG ("Received EOF from fd %i. " + "Closing fd and returning error.", + fd); + close (fd); + return (-1); + } + + assert (nleft >= status); + + nleft = nleft - status; + ptr = ptr + status; + } + + return (0); +} + + +ssize_t swrite (int fd, const void *buf, size_t count) +{ + const char *ptr; + size_t nleft; + ssize_t status; + + ptr = (const char *) buf; + nleft = count; + + while (nleft > 0) + { + status = write (fd, (const void *) ptr, nleft); + + if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR))) + continue; + + if (status < 0) + return (status); + + nleft = nleft - status; + ptr = ptr + status; + } + + return (0); +} + int strsplit (char *string, char **fields, size_t size) { size_t i; char *ptr; + char *saveptr; i = 0; ptr = string; - while ((fields[i] = strtok (ptr, " \t")) != NULL) + saveptr = NULL; + while ((fields[i] = strtok_r (ptr, " \t", &saveptr)) != NULL) { ptr = NULL; i++; @@ -155,6 +253,27 @@ int strjoin (char *dst, size_t dst_len, return (strlen (dst)); } +int strsubstitute (char *str, char c_from, char c_to) +{ + int ret; + + if (str == NULL) + return (-1); + + ret = 0; + while (*str != '\0') + { + if (*str == c_from) + { + *str = c_to; + ret++; + } + str++; + } + + return (ret); +} /* int strsubstitute */ + int escape_slashes (char *buf, int buf_len) { int i; @@ -168,8 +287,12 @@ int escape_slashes (char *buf, int buf_len) return (0); } + if (buf_len <= 1) + return (0); + /* Move one to the left */ - memmove (buf, buf + 1, buf_len - 1); + if (buf[0] == '/') + memmove (buf, buf + 1, buf_len - 1); for (i = 0; i < buf_len - 1; i++) { @@ -181,9 +304,32 @@ int escape_slashes (char *buf, int buf_len) buf[i] = '\0'; return (0); +} /* int escape_slashes */ + +int timeval_sub_timespec (struct timeval *tv0, struct timeval *tv1, struct timespec *ret) +{ + if ((tv0 == NULL) || (tv1 == NULL) || (ret == NULL)) + return (-2); + + if ((tv0->tv_sec < tv1->tv_sec) + || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec))) + return (-1); + + ret->tv_sec = tv0->tv_sec - tv1->tv_sec; + ret->tv_nsec = 1000 * ((long) (tv0->tv_usec - tv1->tv_usec)); + + if (ret->tv_nsec < 0) + { + assert (ret->tv_sec > 0); + + ret->tv_nsec += 1000000000; + ret->tv_sec -= 1; + } + + return (0); } -static int check_create_dir (const char *file_orig) +int check_create_dir (const char *file_orig) { struct stat statbuf; @@ -193,7 +339,9 @@ static int check_create_dir (const char *file_orig) char *fields[16]; int fields_num; char *ptr; + char *saveptr; int last_is_file = 1; + int path_is_absolute = 0; int len; int i; @@ -214,9 +362,11 @@ static int check_create_dir (const char *file_orig) */ if (file_orig[len - 1] == '/') last_is_file = 0; + if (file_orig[0] == '/') + path_is_absolute = 1; /* - * Create a copy for `strtok' to destroy + * Create a copy for `strtok_r' to destroy */ strncpy (file_copy, file_orig, 512); file_copy[511] = '\0'; @@ -226,8 +376,9 @@ static int check_create_dir (const char *file_orig) * remove leading and trailing slashes.. */ ptr = file_copy; + saveptr = NULL; fields_num = 0; - while ((fields[fields_num] = strtok (ptr, "/")) != NULL) + while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL) { ptr = NULL; fields_num++; @@ -248,16 +399,18 @@ static int check_create_dir (const char *file_orig) */ if (fields[i][0] == '.') { - syslog (LOG_ERR, "Cowardly refusing to create a directory that begins with a `.' (dot): `%s'", file_orig); + ERROR ("Cowardly refusing to create a directory that begins with a `.' (dot): `%s'", file_orig); return (-2); } /* * Join the components together again */ - if (strjoin (dir, dir_len, fields, i + 1, "/") < 0) + dir[0] = '/'; + if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute, + fields, i + 1, "/") < 0) { - syslog (LOG_ERR, "strjoin failed: `%s', component #%i", file_orig, i); + ERROR ("strjoin failed: `%s', component #%i", file_orig, i); return (-1); } @@ -267,257 +420,31 @@ static int check_create_dir (const char *file_orig) { if (mkdir (dir, 0755) == -1) { - syslog (LOG_ERR, "mkdir (%s): %s", dir, strerror (errno)); + char errbuf[1024]; + ERROR ("check_create_dir: mkdir (%s): %s", dir, + sstrerror (errno, + errbuf, sizeof (errbuf))); return (-1); } } else { - syslog (LOG_ERR, "stat (%s): %s", dir, strerror (errno)); + char errbuf[1024]; + ERROR ("stat (%s): %s", dir, + sstrerror (errno, errbuf, + sizeof (errbuf))); return (-1); } } else if (!S_ISDIR (statbuf.st_mode)) { - syslog (LOG_ERR, "stat (%s): Not a directory!", dir); - return (-1); - } - } - - return (0); -} - -static int log_create_file (char *filename, char **ds_def, int ds_num) -{ - FILE *log; - int i; - - log = fopen (filename, "w"); - if (log == NULL) - { - syslog (LOG_WARNING, "Failed to create %s: %s", filename, - strerror(errno)); - return (-1); - } - - for (i = 0; i < ds_num; i++) - { - char *name; - char *tmp; - - name = index (ds_def[i], ':'); - if (name == NULL) - { - syslog (LOG_WARNING, "Invalid DS definition '%s' for %s", - ds_def[i], filename); - fclose(log); - remove(filename); - return (-1); - } - - name += 1; - tmp = index(name, ':'); - if (tmp == NULL) - { - syslog (LOG_WARNING, "Invalid DS definition '%s' for %s", - ds_def[i], filename); - fclose(log); - remove(filename); - return (-1); - } - - if (i != 0) - fprintf (log, ":"); - fprintf(log, "%.*s", (tmp - name), name); - } - fprintf(log, "\n"); - fclose(log); - - return 0; -} - -static int log_update_file (char *host, char *file, char *values, - char **ds_def, int ds_num) -{ - char *tmp; - FILE *fp; - struct stat statbuf; - char full_file[1024]; - - /* host == NULL => local mode */ - if (host != NULL) - { - if (snprintf (full_file, 1024, "%s/%s", host, file) >= 1024) - return (-1); - } - else - { - if (snprintf (full_file, 1024, "%s", file) >= 1024) - return (-1); - } - - strncpy (full_file, file, 1024); - - tmp = full_file + strlen (full_file) - 4; - assert (tmp > 0); - - /* Change the filename for logfiles. */ - if (strncmp (tmp, ".rrd", 4) == 0) - { - time_t now; - struct tm *tm; - - now = time (NULL); - tm = localtime (&now); - - strftime (tmp, 1024 - (tmp - full_file), "-%Y-%m-%d", tm); - - /* `localtime(3)' returns a pointer to static data, - * therefore the pointer may not be free'd. */ - } - else - DBG ("The filename ends with `%s' which is unexpected.", tmp); - - if (stat (full_file, &statbuf) == -1) - { - if (errno == ENOENT) - { - if (log_create_file (full_file, ds_def, ds_num)) - return (-1); - } - else - { - syslog (LOG_ERR, "stat %s: %s", full_file, strerror (errno)); - return (-1); - } - } - else if (!S_ISREG (statbuf.st_mode)) - { - syslog (LOG_ERR, "stat %s: Not a regular file!", full_file); - return (-1); - } - - - fp = fopen (full_file, "a"); - if (fp == NULL) - { - syslog (LOG_WARNING, "Failed to append to %s: %s", full_file, - strerror(errno)); - return (-1); - } - fprintf(fp, "%s\n", values); - fclose(fp); - - return (0); -} /* int log_update_file */ - -#if HAVE_LIBRRD -static int rrd_create_file (char *filename, char **ds_def, int ds_num) -{ - char **argv; - int argc; - int i, j; - int status = 0; - - if (check_create_dir (filename)) - return (-1); - - argc = ds_num + rra_num + 4; - - if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL) - { - syslog (LOG_ERR, "rrd_create failed: %s", strerror (errno)); - return (-1); - } - - argv[0] = "create"; - argv[1] = filename; - argv[2] = "-s"; - argv[3] = "10"; - - j = 4; - for (i = 0; i < ds_num; i++) - argv[j++] = ds_def[i]; - for (i = 0; i < rra_num; i++) - argv[j++] = rra_def[i]; - argv[j] = NULL; - - optind = 0; /* bug in librrd? */ - rrd_clear_error (); - if (rrd_create (argc, argv) == -1) - { - syslog (LOG_ERR, "rrd_create failed: %s: %s", filename, rrd_get_error ()); - status = -1; - } - - free (argv); - - return (status); -} -#endif /* HAVE_LIBRRD */ - -int rrd_update_file (char *host, char *file, char *values, - char **ds_def, int ds_num) -{ -#if HAVE_LIBRRD - struct stat statbuf; - char full_file[1024]; - char *argv[4] = { "update", full_file, values, NULL }; -#endif /* HAVE_LIBRRD */ - - /* I'd rather have a function `common_update_file' to make this - * decission, but for that we'd need to touch all plugins.. */ - if (operating_mode == MODE_LOG) - return (log_update_file (host, file, values, - ds_def, ds_num)); - -#if HAVE_LIBRRD - /* host == NULL => local mode */ - if (host != NULL) - { - if (snprintf (full_file, 1024, "%s/%s", host, file) >= 1024) - return (-1); - } - else - { - if (snprintf (full_file, 1024, "%s", file) >= 1024) - return (-1); - } - - if (stat (full_file, &statbuf) == -1) - { - if (errno == ENOENT) - { - if (rrd_create_file (full_file, ds_def, ds_num)) - return (-1); - } - else - { - syslog (LOG_ERR, "stat %s: %s", full_file, strerror (errno)); + ERROR ("stat (%s): Not a directory!", dir); return (-1); } } - else if (!S_ISREG (statbuf.st_mode)) - { - syslog (LOG_ERR, "stat %s: Not a regular file!", full_file); - return (-1); - } - optind = 0; /* bug in librrd? */ - rrd_clear_error (); - if (rrd_update (3, argv) == -1) - { - syslog (LOG_WARNING, "rrd_update failed: %s: %s", full_file, rrd_get_error ()); - return (-1); - } return (0); -/* #endif HAVE_LIBRRD */ - -#else - syslog (LOG_ERR, "`rrd_update_file' was called, but collectd isn't linked against librrd!"); - return (-1); -#endif -} +} /* check_create_dir */ #ifdef HAVE_LIBKSTAT int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name) @@ -534,13 +461,13 @@ int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name) { if ((*ksp_ptr = kstat_lookup (kc, module, instance, name)) == NULL) { - syslog (LOG_ERR, "Cound not find kstat %s", ident); + ERROR ("Cound not find kstat %s", ident); return (-1); } if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED) { - syslog (LOG_WARNING, "kstat %s has wrong type", ident); + WARNING ("kstat %s has wrong type", ident); *ksp_ptr = NULL; return (-1); } @@ -553,13 +480,13 @@ int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name) if (kstat_read (kc, *ksp_ptr, NULL) == -1) { - syslog (LOG_WARNING, "kstat %s could not be read", ident); + WARNING ("kstat %s could not be read", ident); return (-1); } if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED) { - syslog (LOG_WARNING, "kstat %s has wrong type", ident); + WARNING ("kstat %s has wrong type", ident); return (-1); } @@ -599,8 +526,204 @@ long long get_kstat_value (kstat_t *ksp, char *name) else if (kn->data_type == KSTAT_DATA_UINT64) retval = (long long) kn->value.ui64; /* XXX: Might overflow! */ else - syslog (LOG_WARNING, "get_kstat_value: Not a numeric value: %s", name); + WARNING ("get_kstat_value: Not a numeric value: %s", name); return (retval); } #endif /* HAVE_LIBKSTAT */ + +unsigned long long ntohll (unsigned long long n) +{ +#if __BYTE_ORDER == __BIG_ENDIAN + return (n); +#else + return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32); +#endif +} /* unsigned long long ntohll */ + +unsigned long long htonll (unsigned long long n) +{ +#if __BYTE_ORDER == __BIG_ENDIAN + return (n); +#else + return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32); +#endif +} /* unsigned long long htonll */ + +int format_name (char *ret, int ret_len, + const char *hostname, + const char *plugin, const char *plugin_instance, + const char *type, const char *type_instance) +{ + int status; + + assert (plugin != NULL); + assert (type != NULL); + + if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0)) + { + if ((type_instance == NULL) || (strlen (type_instance) == 0)) + status = snprintf (ret, ret_len, "%s/%s/%s", + hostname, plugin, type); + else + status = snprintf (ret, ret_len, "%s/%s/%s-%s", + hostname, plugin, type, + type_instance); + } + else + { + if ((type_instance == NULL) || (strlen (type_instance) == 0)) + status = snprintf (ret, ret_len, "%s/%s-%s/%s", + hostname, plugin, plugin_instance, + type); + else + status = snprintf (ret, ret_len, "%s/%s-%s/%s-%s", + hostname, plugin, plugin_instance, + type, type_instance); + } + + if ((status < 1) || (status >= ret_len)) + return (-1); + return (0); +} /* int format_name */ + +int parse_identifier (char *str, char **ret_host, + char **ret_plugin, char **ret_plugin_instance, + char **ret_type, char **ret_type_instance) +{ + char *hostname = NULL; + char *plugin = NULL; + char *plugin_instance = NULL; + char *type = NULL; + char *type_instance = NULL; + + hostname = str; + if (hostname == NULL) + return (-1); + + plugin = strchr (hostname, '/'); + if (plugin == NULL) + return (-1); + *plugin = '\0'; plugin++; + + type = strchr (plugin, '/'); + if (type == NULL) + return (-1); + *type = '\0'; type++; + + plugin_instance = strchr (plugin, '-'); + if (plugin_instance != NULL) + { + *plugin_instance = '\0'; + plugin_instance++; + } + + type_instance = strchr (type, '-'); + if (type_instance != NULL) + { + *type_instance = '\0'; + type_instance++; + } + + *ret_host = hostname; + *ret_plugin = plugin; + *ret_plugin_instance = plugin_instance; + *ret_type = type; + *ret_type_instance = type_instance; + return (0); +} /* int parse_identifier */ + +int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds) +{ + int i; + char *dummy; + char *ptr; + char *saveptr; + + i = -1; + dummy = buffer; + saveptr = NULL; + while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL) + { + dummy = NULL; + + if (i >= vl->values_len) + break; + + if (i == -1) + { + if (strcmp ("N", ptr) == 0) + vl->time = time (NULL); + else + vl->time = (time_t) atoi (ptr); + } + else + { + if (strcmp ("U", ptr) == 0) + vl->values[i].gauge = NAN; + else if (ds->ds[i].type == DS_TYPE_COUNTER) + vl->values[i].counter = atoll (ptr); + else if (ds->ds[i].type == DS_TYPE_GAUGE) + vl->values[i].gauge = atof (ptr); + } + + i++; + } /* while (strtok_r) */ + + if ((ptr != NULL) || (i != vl->values_len)) + return (-1); + return (0); +} /* int parse_values */ + +#if !HAVE_GETPWNAM_R +int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf, + size_t buflen, struct passwd **pwbufp) +{ + int status = 0; + struct passwd *pw; + + memset (pwbuf, '\0', sizeof (struct passwd)); + + pthread_mutex_lock (&getpwnam_r_lock); + + do + { + pw = getpwnam (name); + if (pw == NULL) + { + status = (errno != 0) ? errno : ENOENT; + break; + } + +#define GETPWNAM_COPY_MEMBER(member) \ + if (pw->member != NULL) \ + { \ + int len = strlen (pw->member); \ + if (len >= buflen) \ + { \ + status = ENOMEM; \ + break; \ + } \ + sstrncpy (buf, pw->member, buflen); \ + pwbuf->member = buf; \ + buf += (len + 1); \ + buflen -= (len + 1); \ + } + GETPWNAM_COPY_MEMBER(pw_name); + GETPWNAM_COPY_MEMBER(pw_passwd); + GETPWNAM_COPY_MEMBER(pw_gecos); + GETPWNAM_COPY_MEMBER(pw_dir); + GETPWNAM_COPY_MEMBER(pw_shell); + + pwbuf->pw_uid = pw->pw_uid; + pwbuf->pw_gid = pw->pw_gid; + + if (pwbufp != NULL) + *pwbufp = pwbuf; + } while (0); + + pthread_mutex_unlock (&getpwnam_r_lock); + + return (status); +} /* int getpwnam_r */ +#endif