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NSH: Add support for while-do-done and until-do-done loops

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This commit is contained in:
Gregory Nutt
2014-01-17 15:56:32 -06:00
parent 97e1d8b535
commit cfb7c77ed3
6 changed files with 423 additions and 54 deletions
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14
nshlib/nsh_command.c
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@@ -460,9 +460,9 @@ static inline void help_usage(FAR struct nsh_vtbl_s *vtbl)
{
nsh_output(vtbl, "NSH command forms:\n");
#ifndef CONFIG_NSH_DISABLEBG
nsh_output(vtbl, " [nice [-d <niceness>>]] <cmd> [> <file>|>> <file>] [&]\n");
nsh_output(vtbl, " [nice [-d <niceness>>]] <cmd> [> <file>|>> <file>] [&]\n\n");
#else
nsh_output(vtbl, " <cmd> [> <file>|>> <file>]\n");
nsh_output(vtbl, " <cmd> [> <file>|>> <file>]\n\n");
#endif
#ifndef CONFIG_NSH_DISABLESCRIPT
nsh_output(vtbl, "OR\n");
@@ -472,6 +472,16 @@ static inline void help_usage(FAR struct nsh_vtbl_s *vtbl)
nsh_output(vtbl, " else\n");
nsh_output(vtbl, " [sequence of <cmd>]\n");
nsh_output(vtbl, " fi\n\n");
nsh_output(vtbl, "OR\n");
nsh_output(vtbl, " while <cmd>\n");
nsh_output(vtbl, " do\n");
nsh_output(vtbl, " [sequence of <cmd>]\n");
nsh_output(vtbl, " done\n\n");
nsh_output(vtbl, "OR\n");
nsh_output(vtbl, " until <cmd>\n");
nsh_output(vtbl, " do\n");
nsh_output(vtbl, " [sequence of <cmd>]\n");
nsh_output(vtbl, " done\n\n");
#endif
}
#endif