#! /usr/bin/env python # Variant of "which".# On stderr, near and total misses are reported.# '-l<flags>' argument adds ls -l<flags> of each file found. import sysif sys.path[0] in (".", ""): del sys.path[0] import sys, osfrom stat import * def msg(str):    sys.stderr.write(str + '\n') def main():    pathlist = os.environ['PATH'].split(os.pathsep)     sts = 0    longlist = ''     if sys.argv[1:] and sys.argv[1][:2] == '-l':        longlist = sys.argv[1]        del sys.argv[1]     for prog in sys.argv[1:]:        ident = ()        for dir in pathlist:            filename = os.path.join(dir, prog)            try:                st = os.stat(filename)            except os.error:                continue            if not S_ISREG(st[ST_MODE]):                msg(filename + ': not a disk file')            else:                mode = S_IMODE(st[ST_MODE])                if mode & 0111:                    if not ident:                        print filename                        ident = st[:3]                    else:                        if st[:3] == ident:                            s = 'same as: '                        else:                            s = 'also: '                        msg(s + filename)                else:                    msg(filename + ': not executable')            if longlist:                sts = os.system('ls ' + longlist + ' ' + filename)                if sts: msg('"ls -l" exit status: ' + repr(sts))        if not ident:            msg(prog + ': not found')            sts = 1     sys.exit(sts) if __name__ == '__main__':    main()