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
following 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)


March 20, 1998 ISAEXEC(3C)