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Adapt sh 'help' command to built-in command lengths

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This commit is contained in:
K. Lange 2018-08-15 23:00:12 +09:00
parent 88affdf86b
commit f36d45b21c
1 changed files with 12 additions and 3 deletions
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15
apps/sh.c
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@ -1272,13 +1272,22 @@ uint32_t shell_cmd_exit(int argc, char * argv[]) {
uint32_t shell_cmd_help(int argc, char * argv[]) {
show_version();
printf("\nThis shell is not POSIX-compliant, please be careful.\n\n");
printf("Built-in commands:\n");
/* First, determine max width of command names */
unsigned int max_len = 0;
for (int i = 0; i < shell_commands_len; ++i) {
if (!shell_descript[i]) continue;
printf(" %-20s - %s\n", shell_commands[i], shell_descript[i]);
if (strlen(shell_commands[i]) > max_len) {
max_len = strlen(shell_commands[i]);
}
}
/* Then print the commands their help text */
for (int i = 0; i < shell_commands_len; ++i) {
if (!shell_descript[i]) continue;
printf(" %-*s - %s\n", max_len + 1, shell_commands[i], shell_descript[i]);
}
return 0;