[PATCH] getdents.2: Use 'ssize_t' instead of 'int'

[Alejandro Colomar <colomar.6.4.3@gmail.com>]

The glibc wrapper for getdents64() uses ssize_t.
And let's use it also for getdents().
It makes more sense than int:
It's a count of bytes, and can report an error (-1).

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
---
 man2/getdents.2 | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/man2/getdents.2 b/man2/getdents.2
index a187fbcef..d660f1bc1 100644
--- a/man2/getdents.2
+++ b/man2/getdents.2
@@ -33,13 +33,13 @@
 getdents, getdents64 \- get directory entries
 .SH SYNOPSIS
 .nf
-.BI "int getdents(unsigned int " fd ", struct linux_dirent *" dirp ,
+.BI "ssize_t getdents(unsigned int " fd ", struct linux_dirent *" dirp ,
 .BI "             unsigned int " count );
 .PP
 .BR "#define _GNU_SOURCE" "        /* See feature_test_macros(7) */"
 .B #include <dirent.h>
 .PP
-.BI "int getdents64(unsigned int " fd ", struct linux_dirent64 *" dirp ,
+.BI "ssize_t getdents64(unsigned int " fd ", struct linux_dirent64 *" dirp ,
 .BI "             unsigned int " count );
 .fi
 .PP
@@ -266,6 +266,7 @@ inode#    file type  d_reclen  d_off   d_name
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/syscall.h>
+#include <sys/types.h>
 
 #define handle_error(msg) \e
         do { perror(msg); exit(EXIT_FAILURE); } while (0)
@@ -282,7 +283,8 @@ struct linux_dirent {
 int
 main(int argc, char *argv[])
 {
-    int fd, nread;
+    int fd;
+    ssize_t nread;
     char buf[BUF_SIZE];
     struct linux_dirent *d;
     char d_type;
@@ -301,7 +303,7 @@ main(int argc, char *argv[])
 
         printf("\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- nread=%d \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\en", nread);
         printf("inode#    file type  d_reclen  d_off   d_name\en");
-        for (int bpos = 0; bpos < nread;) {
+        for (ssize_t bpos = 0; bpos < nread;) {
             d = (struct linux_dirent *) (buf + bpos);
             printf("%8ld  ", d\->d_ino);
             d_type = *(buf + bpos + d\->d_reclen \- 1);
-- 
2.28.0