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Diffstat (limited to 'contrib/sendmail/libsm/memstat.c')
| -rw-r--r-- | contrib/sendmail/libsm/memstat.c | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/contrib/sendmail/libsm/memstat.c b/contrib/sendmail/libsm/memstat.c new file mode 100644 index 0000000..6c2a4d1 --- /dev/null +++ b/contrib/sendmail/libsm/memstat.c @@ -0,0 +1,333 @@ +/* + * Copyright (c) 2005 Sendmail, Inc. and its suppliers. + * All rights reserved. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + */ + +#include <sm/gen.h> +SM_RCSID("@(#)$Id: memstat.c,v 1.4 2005/12/10 00:38:48 ca Exp $") + +#include <errno.h> + +#if USESWAPCTL +#include <sys/stat.h> +#include <sys/swap.h> + +static long sc_page_size; + +/* +** SM_MEMSTAT_OPEN -- open memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_open() +{ + sc_page_size = sysconf(_SC_PAGE_SIZE); + if (sc_page_size == -1) + return (errno != 0) ? errno : -1; + return 0; +} + +/* +** SM_MEMSTAT_CLOSE -- close memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_close() +{ + return 0; +} + +/* +** SM_MEMSTAT_GET -- get memory statistics +** +** Parameters: +** resource -- resource to look up +** pvalue -- (pointer to) memory statistics value (output) +** +** Results: +** 0: success +** !=0: error +*/ + +int +sm_memstat_get(resource, pvalue) + char *resource; + long *pvalue; +{ + int r; + struct anoninfo ai; + + r = swapctl(SC_AINFO, &ai); + if (r == -1) + return (errno != 0) ? errno : -1; + r = ai.ani_max - ai.ani_resv; + r *= sc_page_size >> 10; + *pvalue = r; + return 0; +} + +#elif USEKSTAT + +#include <kstat.h> +#include <sys/sysinfo.h> + +static kstat_ctl_t *kc; +static kstat_t *kst; + +/* +** SM_MEMSTAT_OPEN -- open memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_open() +{ + kstat_named_t *kn; + + kc = kstat_open(); + if (kc == NULL) + return (errno != 0) ? errno : -1; + kst = kstat_lookup(kc, "unix", 0, + (name != NULL) ? name : "system_pages"); + if (kst == 0) + return (errno != 0) ? errno : -2; + return 0; +} + +/* +** SM_MEMSTAT_CLOSE -- close memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_close() +{ + int r; + + if (kc == NULL) + return 0; + r = kstat_close(kc); + if (r != 0) + return (errno != 0) ? errno : -1; + return 0; +} + +/* +** SM_MEMSTAT_GET -- get memory statistics +** +** Parameters: +** resource -- resource to look up +** pvalue -- (pointer to) memory statistics value (output) +** +** Results: +** 0: success +** !=0: error +*/ + +int +sm_memstat_get(resource, pvalue) + char *resource; + long *pvalue; +{ + int r; + kstat_named_t *kn; + + if (kc == NULL || kst == NULL) + return -1; + if (kstat_read(kc, kst, NULL) == -1) + return (errno != 0) ? errno : -2; + kn = kstat_data_lookup(kst, + (resource != NULL) ? resource: "freemem"); + if (kn == NULL) + return (errno != 0) ? errno : -3; + *pvalue = kn->value.ul; + return 0; +} + +#elif USEPROCMEMINFO + +/* +/proc/meminfo? + total: used: free: shared: buffers: cached: +Mem: 261468160 252149760 9318400 0 3854336 109813760 +Swap: 1052794880 62185472 990609408 +MemTotal: 255340 kB +MemFree: 9100 kB +MemShared: 0 kB +Buffers: 3764 kB +Cached: 107240 kB +Active: 104340 kB +Inact_dirty: 4220 kB +Inact_clean: 2444 kB +Inact_target: 4092 kB +HighTotal: 0 kB +HighFree: 0 kB +LowTotal: 255340 kB +LowFree: 9100 kB +SwapTotal: 1028120 kB +SwapFree: 967392 kB +*/ + +#include <stdio.h> +#include <string.h> +static FILE *fp; + +/* +** SM_MEMSTAT_OPEN -- open memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_open() +{ + fp = fopen("/proc/meminfo", "r"); + return (fp != NULL) ? 0 : errno; +} + +/* +** SM_MEMSTAT_CLOSE -- close memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_close() +{ + if (fp != NULL) + { + fclose(fp); + fp = NULL; + } + return 0; +} + +/* +** SM_MEMSTAT_GET -- get memory statistics +** +** Parameters: +** resource -- resource to look up +** pvalue -- (pointer to) memory statistics value (output) +** +** Results: +** 0: success +** !=0: error +*/ + +int +sm_memstat_get(resource, pvalue) + char *resource; + long *pvalue; +{ + int r; + size_t l; + char buf[80]; + + if (resource == NULL) + return EINVAL; + if (pvalue == NULL) + return EINVAL; + if (fp == NULL) + return -1; /* try to reopen? */ + rewind(fp); + l = strlen(resource); + while (fgets(buf, sizeof(buf), fp) != NULL) + { + if (strncmp(buf, resource, l) == 0 && buf[l] == ':') + { + r = sscanf(buf + l + 1, "%ld", pvalue); + return (r > 0) ? 0 : -1; + } + } + return 0; +} + +#else /* USEPROCMEMINFO */ + +/* +** SM_MEMSTAT_OPEN -- open memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_open() +{ + return -1; +} + +/* +** SM_MEMSTAT_CLOSE -- close memory statistics +** +** Parameters: +** none +** +** Results: +** errno as error code, 0: ok +*/ + +int +sm_memstat_close() +{ + return 0; +} + +/* +** SM_MEMSTAT_GET -- get memory statistics +** +** Parameters: +** resource -- resource to look up +** pvalue -- (pointer to) memory statistics value (output) +** +** Results: +** 0: success +** !=0: error +*/ + +int +sm_memstat_get(resource, pvalue) + char *resource; + long *pvalue; +{ + return -1; +} + +#endif /* USEKSTAT */ |
