ccx-utils

Miscellaneous utilities written in C
git clone https://ccx.te2000.cz/git/ccx-utils
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ptsname.c (687B)

      1 #include <unistd.h>  /* write() */
      2 #include <stdlib.h>  /* ptsname() */
      3 #include <string.h>
      4 
      5 #include <skalibs/types.h>
      6 #include <skalibs/strerr.h>
      7 
      8 #define USAGE "ptsname ptmx_fd"
      9 #define PROG "ptsname"
     10 
     11 
     12 int main (int argc, char const *const *argv)
     13 {
     14   unsigned int ptmx_fd;
     15   const char *pts_name;
     16   if ((argc != 2)) strerr_dieusage(100, USAGE) ;
     17   if (!uint0_scan(argv[1], &ptmx_fd)) strerr_dieusage(100, USAGE) ;
     18 
     19   pts_name = ptsname(ptmx_fd);
     20   if (pts_name == NULL) {
     21     strerr_dief1sys(111, "ptsname()");
     22   }
     23 
     24   if (write(1, pts_name, strlen(pts_name)) <= 0) {
     25     strerr_dief1sys(111, "write()");
     26   }
     27   if (write(1, "\n", 1) <= 0) {
     28     strerr_dief1sys(111, "write()");
     29   }
     30 }