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   sd_bus_message_read    ( 3 )

прочитать последовательность значений из сообщения (Read a sequence of values from a message)
  Name  |  Synopsis  |  Description  |  Return value  |  Note  |    Examples    |  See also  |

Примеры (Examples)

Read a single basic type (a 64-bit integer):


           sd_bus_message *m;
           int64_t x;


           sd_bus_message_read(m, "x", &x);


       Read a boolean value:


           sd_bus_message *m;
           int x; /* Do not use C99 'bool' type here, it's typically smaller
                     in memory and would cause memory corruption */


           sd_bus_message_read(m, "b", &x);


       Read all types of integers:


           uint8_t y;
           int16_t n;
           uint16_t q;
           int32_t i;
           uint32_t u;
           int32_t x;
           uint32_t t;
           double d;


           sd_bus_message_read(m, "ynqiuxtd", &y, &n, &q, &i, &u, &x, &t, &d);


       Read a structure composed of a string and a D-Bus path:


           const char *s, *p;


           sd_bus_message_read(m, "(so)", &s, &p);


       Read a variant, with the real type "gt" (signature, unsigned
       integer):


           const char *s;
           uint64_t *v;


           sd_bus_message_read(m, "v", "gt", &s, &v);


       Read a dictionary containing three pairs of type
       {integer=>string}:


           int i, j, k;
           const char *s, *t, *u;


           sd_bus_message_read(m, "a{is}", 3, &i, &s, &j, &t, &k, &u);


       Read a single file descriptor, and duplicate it in order to keep
       it open after the message is freed.


           sd_bus_message *m;
           int fd, fd_copy;


           sd_bus_message_read(m, "h", &fd);
           fd_copy = fcntl(fd, FD_DUPFD_CLOEXEC, 3);