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27755: add "zsystem supports" to zsh/system

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This commit is contained in:
Peter Stephenson 2010-02-25 11:15:26 +00:00
parent bec3de98df
commit a3b971a27e
3 changed files with 47 additions and 1 deletions
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31
Src/Modules/system.c
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@ -491,6 +491,35 @@ bin_zsystem_flock(char *nam, char **args, UNUSED(Options ops), UNUSED(int func))
}
/*
* Return status zero if the zsystem feature is supported, else 1.
* Operates silently for future-proofing.
*/
/**/
static int
bin_zsystem_supports(char *nam, char **args,
UNUSED(Options ops), UNUSED(int func))
{
if (!args[0]) {
zwarnnam(nam, "supports: not enough arguments");
return 255;
}
if (args[1]) {
zwarnnam(nam, "supports: too many arguments");
return 255;
}
/* stupid but logically this should work... */
if (!strcmp(*args, "supports"))
return 0;
#ifdef HAVE_FCNTL_H
if (!strcmp(*args, "flock"))
return 0;
#endif
return 1;
}
/**/
static int
bin_zsystem(char *nam, char **args, Options ops, int func)
@ -498,6 +527,8 @@ bin_zsystem(char *nam, char **args, Options ops, int func)
/* If more commands are implemented, this can be more sophisticated */
if (!strcmp(*args, "flock")) {
return bin_zsystem_flock(nam, args+1, ops, func);
} else if (!strcmp(*args, "supports")) {
return bin_zsystem_supports(nam, args+1, ops, func);
}
zwarnnam(nam, "unknown subcommand: %s", *args);
return 1;