getexecname(3c) [osx man page]

getexecname(3C) 					   Standard C Library Functions 					   getexecname(3C)

NAME

       getexecname - return pathname of executable

SYNOPSIS

       #include <stdlib.h>

       const char *getexecname(void);

DESCRIPTION

       The  getexecname() function returns the pathname (the first argument of one of the exec family of functions; see exec(2)) of the executable
       that started the process.

       Normally this is an absolute pathname, as the majority of commands are executed by the shells that append the command name  to  the  user's
       PATH  components.   If this is not an absolute path, the output of getcwd(3C) can be prepended to it to create an absolute path, unless the
       process or one of its ancestors has changed its root directory or current working directory since the last successful call to  one  of  the
       exec family of functions.

RETURN VALUES

       If successful, getexecname() returns a pointer to the executables pathname; otherwise, it returns 0.

USAGE

       The getexecname() function obtains the executable pathname from the AT_SUN_EXECNAME aux vector.	These vectors are made available to dynam-
       ically linked processes only.

       A successful call to one of the exec family of functions will always have AT_SUN_EXECNAME in the aux vector.  The  associated  pathname	is
       guaranteed to be less than or equal to PATH_MAX, not counting the trailing null byte that is always present.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       exec(2), getcwd(3C), attributes(5)

SunOS 5.10							    17 Dec 1997 						   getexecname(3C)

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 5.10                                                          20 Mar 1998                                                        isaexec(3C)