12-02-2002
You're not supposed to use link()/unlink() on directories anymore. You create directories with mkdir(). You remove them with rmdir(). And you rename them with rename(). What you are attempting is a rename operation.
With link() you had to: link it to the new name, unlink the old name. And if the parent changed, unlink .. and link in a new ..
But rename() will do all of this atomically. Even if you write your program correctly using link/unlink, if it dies during the process, your filesystem will be hosed.
And anyway, only root can link/unlink directories.
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LEARN ABOUT OPENSOLARIS
isaexec
isaexec(3C) Standard C Library Functions isaexec(3C)
NAME
isaexec - invoke isa-specific executable
SYNOPSIS
#include <unistd.h>
int isaexec(const char *path, char *const argv[], char *const envp[]);
DESCRIPTION
The isaexec() function takes the path specified as path and breaks it into directory and file name components. It enquires from the running
system the list of supported instruction set architectures; see isalist(5). The function traverses the list for an executable file in named
subdirectories of the original directory. When such a file is located, execve() is invoked with argv[] and envp[]. See exec(2).
RETURN VALUES
If no file is located, isaexec() returns ENOENT. Other return values are the same as for execve().
EXAMPLES
Example 1 Example of isaexec() function.
On a system whose isalist is
sparcv7 sparc
the program
int
main(int argc, char *argv[], char *envp[])
{
return (isaexec("/bin/thing", argv, envp));
}
will look first for an executable file named /bin/sparcv7/thing, then for an executable file named /bin/sparc/thing. It will invoke
execve() on the first executable file it finds named thing.
On that same system, a program called /u/bin/tofu can cause either /u/bin/sparcv7/tofu or /u/bin/sparc/tofu to be invoked using the follow-
ing code:
int
main(int argc, char *argv[], char *envp[])
{
return (isaexec(getexecname(), argv, envp));
}
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
|Interface Stability |Stable |
+-----------------------------+-----------------------------+
SEE ALSO
exec(2), getexecname(3C), attributes(5), isalist(5)
SunOS 5.11 20 Mar 1998 isaexec(3C)