[hackers] [sbase] printf: allow flags for the %s format string aswell || Hiltjo Posthuma

[git]

commit 1cc5a57fd7f0c72d9e4c383cfb5c7decf39fa346
Author:     Hiltjo Posthuma <hil...@codemadness.org>
AuthorDate: Sun Jul 25 14:24:41 2021 +0200
Commit:     Hiltjo Posthuma <hil...@codemadness.org>
CommitDate: Mon Jul 26 20:10:09 2021 +0200

    printf: allow flags for the %s format string aswell
    
    This is useful for example to left-align strings and pad them with spaces.
    
    printf '%-12.12s: %s\n' 'user' "$USER"

diff --git a/printf.c b/printf.c
index 4bc645b..039dac7 100644
--- a/printf.c
+++ b/printf.c
@@ -127,7 +127,11 @@ main(int argc, char *argv[])
                        free(rarg);
                        break;
                case 's':
-                       printf("%*.*s", width, precision, arg);
+                       fmt = estrdup(flag ? "%#*.*s" : "%*.*s");
+                       if (flag)
+                               fmt[1] = flag;
+                       printf(fmt, width, precision, arg);
+                       free(fmt);
                        break;
                case 'd': case 'i': case 'o': case 'u': case 'x': case 'X':
                        for (j = 0; isspace(arg[j]); j++);