src/gromacs/utility/sysinfo.cpp

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  36 /*! \internal \file
  37  * \brief
  38  * Implements functions from sysinfo.h.
  39  *
  40  * \author Teemu Murtola <teemu.murtola@gmail.com>
  41  * \ingroup module_utility
  42  */
  43 #include "gmxpre.h"
  44
  45 #include "sysinfo.h"
  46
  47 #include "config.h"
  48
  49 #include <cstring>
  50 #include <ctime>
  51
  52 #include <array>
  53
  54 #include <sys/types.h>
  55 #ifdef HAVE_SYS_TIME_H
  56 #    include <sys/time.h>
  57 #endif
  58 #if GMX_NATIVE_WINDOWS
  59 #    include <Windows.h>
  60 #    include <process.h>
  61 #endif
  62 #if HAVE_PWD_H
  63 #    include <pwd.h>
  64 #endif
  65 #ifdef HAVE_UNISTD_H
  66 #    include <unistd.h>
  67 #endif
  68
  69 #include "gromacs/utility/basedefinitions.h"
  70 #include "gromacs/utility/gmxassert.h"
  71
  72 namespace
  73 {
  74 //! Static return value for cases when a string value is not available.
  75 const char c_unknown[] = "unknown";
  76 } // namespace
  77
  78 int gmx_gethostname(char* buf, size_t len)
  79 {
  80     GMX_RELEASE_ASSERT(len >= 8, "Input buffer is too short");
  81 #if GMX_NATIVE_WINDOWS
  82     DWORD dlen = len;
  83     if (GetComputerName(buf, &dlen))
  84     {
  85         return 0;
  86     }
  87 #elif defined(HAVE_UNISTD_H) && !defined(__native_client__)
  88     if (gethostname(buf, len - 1) == 0)
  89     {
  90         buf[len - 1] = '\0';
  91         return 0;
  92     }
  93 #endif
  94     strcpy(buf, c_unknown);
  95     return -1;
  96 }
  97
  98 int gmx_getpid()
  99 {
 100 #if GMX_NATIVE_WINDOWS
 101     return _getpid();
 102 #else
 103     return getpid();
 104 #endif
 105 }
 106
 107 int gmx_getuid()
 108 {
 109 #if defined(HAVE_UNISTD_H) && !defined(__MINGW32__)
 110     return getuid();
 111 #else
 112     return -1;
 113 #endif
 114 }
 115
 116 int gmx_getusername(char* buf, size_t len)
 117 {
 118     GMX_RELEASE_ASSERT(len >= 8, "Input buffer is too short");
 119     // TODO: nice_header() used getpwuid() instead; consider using getpwuid_r()
 120     // here.  If not, get rid of HAVE_PWD_H completely.
 121 #if GMX_NATIVE_WINDOWS
 122     DWORD dlen = len;
 123     if (GetUserName(buf, &dlen))
 124     {
 125         return 0;
 126     }
 127 #elif defined(HAVE_UNISTD_H) && !__has_feature(memory_sanitizer) // MSAN Issue 83
 128     if (!getlogin_r(buf, len))
 129     {
 130         buf[len - 1] = '\0';
 131         return 0;
 132     }
 133 #endif
 134     strcpy(buf, c_unknown);
 135     return -1;
 136 }
 137
 138 std::string gmx_ctime_r(const time_t* clock)
 139 {
 140 #ifdef _MSC_VER
 141     std::array<char, 1024> buf;
 142     ctime_s(buf.data(), buf.size(), clock);
 143     return std::string(buf.begin(), buf.end());
 144 #elif GMX_NATIVE_WINDOWS
 145     char* tmpbuf = ctime(clock);
 146     return tmpbuf;
 147 #elif (defined(__sun))
 148     /*Solaris*/
 149     std::array<char, 1024> buf;
 150     ctime_r(clock, buf.data());
 151     return std::string(buf.begin(), buf.end());
 152 #else
 153     std::array<char, 1024> buf;
 154     ctime_r(clock, buf.data());
 155     return std::string(buf.begin(), buf.end());
 156 #endif
 157 }
 158
 159 std::string gmx_format_current_time()
 160 {
 161     time_t clock = time(nullptr);
 162     return gmx_ctime_r(&clock);
 163 }
 164
 165 int gmx_set_nice(int level)
 166 {
 167 #if GMX_USE_NICE
 168     // TODO: This may not be reliable, but currently the return value is not
 169     // used.
 170     if (nice(level) != -1)
 171     {
 172         return 0;
 173     }
 174 #else
 175     GMX_UNUSED_VALUE(level);
 176 #endif
 177     return -1;
 178 }