Initial commit of src/ptmx.c

src/Makefile

@@ -13,7 +13,7 @@ HEADERS		= buffer.h kiss.h ax25.h ax25/if.h ax25/macros.h ax25/proto.h \
 OBJS		= buffer.o kiss.o ax25.o if.o address.o frame.o \
 		  list.o hash.o dict.o
 
-EXAMPLES	= iflist decode
+EXAMPLES	= iflist decode ptmx
 
 AR		= $(CROSS)ar
 RANLIB		= $(CROSS)ranlib

src/ptmx.c

@@ -0,0 +1,53 @@
+#define _XOPEN_SOURCE
+#define _XOPEN_SOURCE_EXTENDED
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+int main(int argc, char **argv) {
+    int ptm;
+    char ptsname[64];
+
+    if ((ptm = open("/dev/ptmx", O_RDWR)) < 0) {
+        fprintf(stderr, "%s: %s: %s: %s\n", argv[0], "open()", "/dev/ptmx", strerror(errno));
+
+        goto error_open_ptmx;
+    }
+
+    if (grantpt(ptm) < 0) {
+        fprintf(stderr, "%s: %s: %s\n", argv[0], "grantpt()", strerror(errno));
+
+        goto error_grantpt_ptm;
+    }
+
+    if (unlockpt(ptm) < 0) {
+        fprintf(stderr, "%s: %s: %s\n", argv[0], "unlockpt()", strerror(errno));
+
+        goto error_unlockpt_ptm;
+    }
+
+    if (ptsname_r(ptm, ptsname, sizeof(ptsname)) < 0) {
+        fprintf(stderr, "%s: %s: %s: %s\n", argv[0], "ptsname_r()", "/dev/ptmx", strerror(errno));
+
+        goto error_ptsname_r_ptm;
+    }
+
+    printf("pts %s\n", ptsname);
+
+    close(ptm);
+
+    return 0;
+
+error_unlockpt_ptm:
+error_grantpt_ptm:
+error_ptsname_r_ptm:
+    close(ptm);
+
+error_open_ptmx:
+    return 127;
+}