336 lines
6.8 KiB
C
336 lines
6.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <assert.h>
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#include "sigar.h"
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#include "sigar_private.h"
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#include "sigar_os.h"
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#include "sigar_util.h"
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#ifndef WIN32
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#include <dirent.h>
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SIGAR_INLINE char *sigar_uitoa(char *buf, unsigned int n, int *len)
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{
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char *start = buf + UITOA_BUFFER_SIZE - 1;
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*start = 0;
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do {
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*--start = '0' + (n % 10);
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++*len;
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n /= 10;
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} while (n);
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return start;
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}
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SIGAR_INLINE char *sigar_skip_line(char *buffer, int buflen)
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{
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char *ptr = buflen ?
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(char *)memchr(buffer, '\n', buflen) : /* bleh */
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strchr(buffer, '\n');
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return ++ptr;
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}
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SIGAR_INLINE char *sigar_skip_token(char *p)
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{
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while (sigar_isspace(*p)) p++;
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while (*p && !sigar_isspace(*p)) p++;
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return p;
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}
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SIGAR_INLINE char *sigar_skip_multiple_token(char *p, int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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p = sigar_skip_token(p);
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}
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return p;
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}
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int sigar_file2str(const char *fname, char *buffer, int buflen)
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{
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int len;
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int fd = open(fname, O_RDONLY);
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if (fd < 0) {
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return ENOENT;
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}
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len = read(fd, buffer, buflen);
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buffer[len] = '\0';
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close(fd);
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return SIGAR_OK;
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}
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/* avoiding sprintf */
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char *sigar_proc_filename(char *buffer, int buflen,
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sigar_pid_t bigpid,
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const char *fname, int fname_len)
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{
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int len = 0;
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char *ptr = buffer;
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unsigned int pid = (unsigned int)bigpid; /* XXX -- This isn't correct */
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char pid_buf[UITOA_BUFFER_SIZE];
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char *pid_str = sigar_uitoa(pid_buf, pid, &len);
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assert((unsigned int)buflen >=
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(SSTRLEN(PROC_FS_ROOT) + UITOA_BUFFER_SIZE + fname_len + 1));
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memcpy(ptr, PROC_FS_ROOT, SSTRLEN(PROC_FS_ROOT));
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ptr += SSTRLEN(PROC_FS_ROOT);
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memcpy(ptr, pid_str, len);
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ptr += len;
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memcpy(ptr, fname, fname_len);
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ptr += fname_len;
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*ptr = '\0';
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return buffer;
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}
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int sigar_proc_file2str(char *buffer, int buflen,
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sigar_pid_t pid,
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const char *fname,
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int fname_len)
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{
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int retval;
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buffer = sigar_proc_filename(buffer, buflen, pid,
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fname, fname_len);
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retval = sigar_file2str(buffer, buffer, buflen);
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if (retval != SIGAR_OK) {
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switch (retval) {
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case ENOENT:
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retval = ESRCH; /* no such process */
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default:
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break;
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}
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}
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return retval;
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}
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int sigar_proc_list_procfs_get(sigar_t *sigar,
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sigar_proc_list_t *proclist)
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{
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DIR *dirp = opendir("/proc");
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struct dirent *ent;
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#ifdef HAVE_READDIR_R
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struct dirent dbuf;
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#endif
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if (!dirp) {
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return errno;
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}
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sigar_proc_list_create(proclist);
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#ifdef HAVE_READDIR_R
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while (readdir_r(dirp, &dbuf, &ent) == 0) {
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if (ent == NULL) {
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break;
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}
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#else
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while ((ent = readdir(dirp))) {
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#endif
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if (!sigar_isdigit(*ent->d_name)) {
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continue;
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}
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/* XXX: more sanity checking */
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SIGAR_PROC_LIST_GROW(proclist);
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proclist->data[proclist->number++] =
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strtoul(ent->d_name, NULL, 10);
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}
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closedir(dirp);
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return SIGAR_OK;
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}
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int sigar_proc_fd_count(sigar_t *sigar, sigar_pid_t pid,
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sigar_uint64_t *total)
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{
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DIR *dirp;
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struct dirent *ent;
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#ifdef HAVE_READDIR_R
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struct dirent dbuf;
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#endif
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char name[BUFSIZ];
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(void)SIGAR_PROC_FILENAME(name, pid, "/fd");
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*total = 0;
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if (!(dirp = opendir(name))) {
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return errno;
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}
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#ifdef HAVE_READDIR_R
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while (readdir_r(dirp, &dbuf, &ent) == 0) {
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if (ent == NULL) {
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break;
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}
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#else
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while ((ent = readdir(dirp))) {
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#endif
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if (!sigar_isdigit(*ent->d_name)) {
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continue;
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}
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(*total)++;
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}
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closedir(dirp);
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return SIGAR_OK;
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}
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#endif /* WIN32 */
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/* os impls should use an optimized version of this */
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int sigar_proc_count(sigar_t *sigar, sigar_uint64_t *total)
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{
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int status;
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sigar_proc_list_t proclist;
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*total = 0;
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if ((status = sigar_proc_list_get(sigar, &proclist)) != SIGAR_OK) {
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return status;
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}
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*total = proclist.number;
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sigar_proc_list_destroy(sigar, &proclist);
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return SIGAR_OK;
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}
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int sigar_mem_calc_ram(sigar_t *sigar, sigar_mem_t *mem)
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{
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sigar_uint64_t lram = (mem->total / (1024 * 1024));
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int ram = (int)lram; /* must cast after division */
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int remainder = ram % 8;
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if (remainder > 0) {
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ram += (8 - remainder);
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}
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mem->ram = ram;
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return ram;
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}
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double sigar_file_system_usage_calc_used(sigar_t *sigar,
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sigar_file_system_usage_t *fsusage)
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{
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/*
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* win32 will not convert __uint64 to double.
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* convert to KB then do unsigned long -> double.
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*/
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sigar_uint64_t b_used = (fsusage->total - fsusage->free) / 1024;
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sigar_uint64_t b_avail = fsusage->avail / 1024;
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unsigned long utotal = b_used + b_avail;
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unsigned long used = b_used;
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if (utotal != 0) {
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unsigned long u100 = used * 100;
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double pct = u100 / utotal +
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((u100 % utotal != 0) ? 1 : 0);
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return pct / 100;
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}
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return 0;
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}
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#ifdef WIN32
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#define vsnprintf _vsnprintf
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#endif
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SIGAR_DECLARE(void) sigar_log_printf(sigar_t *sigar, int level,
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const char *format, ...)
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{
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va_list args;
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char buffer[8192];
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if (level > sigar->log_level) {
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return;
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}
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if (!sigar->log_impl) {
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return;
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}
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va_start(args, format);
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vsnprintf(buffer, sizeof(buffer), format, args);
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va_end(args);
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sigar->log_impl(sigar, sigar->log_data, level, buffer);
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}
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SIGAR_DECLARE(void) sigar_log(sigar_t *sigar, int level, char *message)
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{
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if (level > sigar->log_level) {
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return;
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}
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if (!sigar->log_impl) {
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return;
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}
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sigar->log_impl(sigar, sigar->log_data, level, message);
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}
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SIGAR_DECLARE(void) sigar_log_impl_set(sigar_t *sigar, void *data,
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sigar_log_impl_t impl)
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{
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sigar->log_data = data;
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sigar->log_impl = impl;
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}
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SIGAR_DECLARE(int) sigar_log_level_get(sigar_t *sigar)
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{
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return sigar->log_level;
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}
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static const char *log_levels[] = {
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"FATAL",
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"ERROR",
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"WARN",
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"INFO",
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"DEBUG",
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"TRACE"
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};
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SIGAR_DECLARE(const char *) sigar_log_level_string_get(sigar_t *sigar)
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{
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return log_levels[sigar->log_level];
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}
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SIGAR_DECLARE(void) sigar_log_level_set(sigar_t *sigar, int level)
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{
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sigar->log_level = level;
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}
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SIGAR_DECLARE(void) sigar_log_impl_file(sigar_t *sigar, void *data,
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int level, char *message)
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{
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FILE *fp = (FILE*)data;
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fprintf(fp, "[%s] %s\n", log_levels[level], message);
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}
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