Move getusername/getgroupname to lib. (Return name or string representation

of number, but never NULL. Both returned in static buffer good through
next call.)

3 files changed, 26 insertions, 17 deletions

diff --git a/lib/lib.c b/lib/lib.c
index 718ea3ac..8f8b4a3b 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -1184,3 +1184,26 @@ int regexec0(regex_t *preg, char *string, long len, int nmatch,
     len -= ll;
   }
 }
+
+// Return user name or string representation of number, returned buffer
+// lasts until next call.
+char *getusername(uid_t uid)
+{
+  struct passwd *pw = bufgetpwuid(uid);
+  static char unum[12];
+
+  sprintf(unum, "%u", (unsigned)uid);
+  return pw ? pw->pw_name : unum;
+}
+
+// Return group name or string representation of number, returned buffer
+// lasts until next call.
+char *getgroupname(gid_t gid)
+{
+  struct group *gr = bufgetgrgid(gid);
+  static char gnum[12];
+
+  sprintf(gnum, "%u", (unsigned)gid);
+  return gr ? gr->gr_name : gnum;
+}
+
diff --git a/lib/lib.h b/lib/lib.h
index 520a5ed6..67d53035 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -223,6 +223,8 @@ int readlinkat0(int dirfd, char *path, char *buf, int len);
 int readlink0(char *path, char *buf, int len);
 int regexec0(regex_t *preg, char *string, long len, int nmatch,
   regmatch_t pmatch[], int eflags);
+char *getusername(uid_t uid);
+char *getgroupname(gid_t gid);
 
 #define HR_SPACE 1 // Space between number and units
 #define HR_B     2 // Use "B" for single byte units
diff --git a/toys/posix/ls.c b/toys/posix/ls.c
index 3ad28da4..d48fb831 100644
--- a/toys/posix/ls.c
+++ b/toys/posix/ls.c
@@ -61,7 +61,7 @@ GLOBALS(
 
   unsigned screen_width;
   int nl_title;
-  char uid_buf[12], gid_buf[12], *escmore;
+  char *escmore;
 )
 
 // Callback from crunch_str to represent unprintable chars
@@ -121,22 +121,6 @@ static char endtype(struct stat *st)
   return 0;
 }
 
-static char *getusername(uid_t uid)
-{
-  struct passwd *pw = bufgetpwuid(uid);
-
-  sprintf(TT.uid_buf, "%u", (unsigned)uid);
-  return pw ? pw->pw_name : TT.uid_buf;
-}
-
-static char *getgroupname(gid_t gid)
-{
-  struct group *gr = bufgetgrgid(gid);
-
-  sprintf(TT.gid_buf, "%u", (unsigned)gid);
-  return gr ? gr->gr_name : TT.gid_buf;
-}
-
 static int numlen(long long ll)
 {
   return snprintf(0, 0, "%llu", ll);