#pragma prototyped

static const char usage[] =

"according to mode, which can be either a symbolic representation "

"of changes to make, or an octal number representing the bit "

"pattern for the new permissions.]"

"of operations that can be perfomed on the mode. Each operation is of "

"the form \auser\a \aop\a \aperm\a where \auser\a is zero or more of "

"the following letters:]{"

"[+u?User permission bits.]"

"[+g?Group permission bits.]"

"[+o?Other permission bits.]"

"[+a?All permission bits. This is the default if none are specified.]"

"}"

"[+r?Read permission.]"

"[+s?Setuid when \bu\b is selected for \awho\a and setgid when \bg\b "

"is selected for \awho\a.]"

"[+w?Write permission.]"

"[+x?Execute permission for files, search permission for directories.]"

"[+X?Same as \bx\b except that it is ignored for files that do not "

"already have at least one \bx\b bit set.]"

"[+l?Exclusive lock bit on systems that support it. Group execute "

"must be off.]"

"[+t?Sticky bit on systems that support it.]"

"}"

"[++?Cause the permission selected to be added to the existing "

"permissions. | is equivalent to +.]"

"[+-?Cause the permission selected to be removed to the existing "

"permissions.]"

"[+=?Cause the permission to be set to the given permissions.]"

"[+&?Cause the permission selected to be \aand\aed with the existing "

"permissions.]"

"[+^?Cause the permission selected to be propagated to more "

"restrictive groups.]"

"}"

"\bumask\b(2) settings unless the \b=\b \aop\a or the "

"\b--ignore-umask\b option is specified.]"

"derived by adding up the bits with values 4, 2, and 1. "

"Any omitted digits are assumed to be leading zeros. The "

"first digit selects the set user ID (4) and set group ID "

"(2) and save text image (1) attributes. The second digit "

"selects permissions for the user who owns the file: read "

"(4), write (2), and execute (1); the third selects permissions"

"for other users in the file's group, with the same values; "

"and the fourth for other users not in the file's group, with "

"the same values.]"

"referenced by the symbolic link, not on the symbolic link itself. "

"The \b-h\b options can be specified to change the mode of the link. "

"When traversing directories with \b-R\b, \bchmod\b either follows "

"symbolic links or does not follow symbolic links, based on the "

"options \b-H\b, \b-L\b, and \b-P\b. The configuration parameter "

"\bPATH_RESOLVE\b determines the default behavior if none of these "

"options is specified.]"

"are written to standard output using the format, "

"\b%s: mode changed to %0.4o (%s)\b, with arguments of the "

"pathname, the numeric mode, and the resulting permission bits as "

"would be displayed by the \bls\b command.]"

"symbolic mode specification, \bchmod\b treats this as a mode "

"specification rather than as an option specification.]"

"follow symbolic links when traversing directories.]"

"support \blchmod\b(2). Implies \b--physical\b.]"

"expressions. This is probably how you expect \bchmod\b to work.]"

"instead.]:[file]"

"[+0?All files changed successfully.]"

"[+>0?Unable to change mode of one or more files.]"

"\bls\b(1), \bumask\b(2)]"

;

#if defined(__STDPP__directive) && defined(__STDPP__hide)

__STDPP__directive pragma pp:hide lchmod

#else

#define lchmod ______lchmod

#endif

#include <cmd.h>

#include <ls.h>

#include <fts_fix.h>

#ifndef ENOSYS

#define ENOSYS EINVAL

#endif

#include "FEATURE/symlink"

#if defined(__STDPP__directive) && defined(__STDPP__hide)

__STDPP__directive pragma pp:nohide lchmod

#else

#undef lchmod

#endif

extern int lchmod(const char*, mode_t);

b_chmod(int argc, char** argv, Shbltin_t* context)

{

register int mode;

register int force = 0;

register int flags;

register char* amode = 0;

register FTS* fts;

register FTSENT*ent;

char* last;

int (*chmodf)(const char*, mode_t);

int logical = 1;

int notify = 0;

int ignore = 0;

int show = 0;

int chlink = 0;

struct stat st;

cmdinit(argc, argv, context, ERROR_CATALOG, ERROR_NOTIFY);

flags = fts_flags() | FTS_META | FTS_TOP | FTS_NOPOSTORDER | FTS_NOSEEDOTDIR;

/*

for (;;)

{

switch (optget(argv, usage))

{

case 'c':

notify = 1;

continue;

case 'f':

force = 1;

continue;

case 'h':

chlink = 1;

continue;

case 'i':

ignore = 1;

continue;

case 'n':

show = 1;

continue;

case 'v':

notify = 2;

continue;

case 'F':

if (stat(opt_info.arg, &st))

error(ERROR_exit(1), "%s: cannot stat", opt_info.arg);

mode = st.st_mode;

amode = "";

continue;

case 'H':

flags |= FTS_META|FTS_PHYSICAL;

logical = 0;

continue;

case 'L':

flags &= ~(FTS_META|FTS_PHYSICAL);

logical = 0;

continue;

case 'P':

flags &= ~FTS_META;

flags |= FTS_PHYSICAL;

logical = 0;

continue;

case 'R':

flags &= ~FTS_TOP;

logical = 0;

continue;

case '?':

error(ERROR_usage(2), "%s", opt_info.arg);

break;

}

break;

}

argv += opt_info.index;

if (error_info.errors || !*argv || !amode && !*(argv + 1))

error(ERROR_usage(2), "%s", optusage(NiL));

if (chlink)

{

flags &= ~FTS_META;

flags |= FTS_PHYSICAL;

logical = 0;

}

if (logical)

flags &= ~(FTS_META|FTS_PHYSICAL);

if (ignore)

ignore = umask(0);

if (amode)

amode = 0;

else

{

amode = *argv++;

mode = strperm(amode, &last, 0);

if (*last)

{

if (ignore)

umask(ignore);

error(ERROR_exit(1), "%s: invalid mode", amode);

}

}

if (!(fts = fts_open(argv, flags, NiL)))

{

if (ignore)

umask(ignore);

error(ERROR_system(1), "%s: not found", *argv);

}

while (!sh_checksig(context) && (ent = fts_read(fts)))

switch (ent->fts_info)

{

case FTS_SL:

case FTS_SLNONE:

if (chlink)

{

#if _lib_lchmod

chmodf = lchmod;

goto commit;

#else

if (!force)

{

errno = ENOSYS;

error(ERROR_system(0), "%s: cannot change symlink mode", ent->fts_path);

}

#endif

}

break;

case FTS_F:

case FTS_D:

anyway:

chmodf = chmod;

#if _lib_lchmod

commit:

#endif

if (amode)

mode = strperm(amode, &last, ent->fts_statp->st_mode);

if (show || (*chmodf)(ent->fts_accpath, mode) >= 0)

{

if (notify == 2 || notify == 1 && (mode&S_IPERM) != (ent->fts_statp->st_mode&S_IPERM))

sfprintf(sfstdout, "%s: mode changed to %0.4o (%s)\n", ent->fts_path, mode, fmtmode(mode, 1)+1);

}

else if (!force)

error(ERROR_system(0), "%s: cannot change mode", ent->fts_path);

break;

case FTS_DC:

if (!force)

error(ERROR_warn(0), "%s: directory causes cycle", ent->fts_path);

break;

case FTS_DNR:

if (!force)

error(ERROR_system(0), "%s: cannot read directory", ent->fts_path);

goto anyway;

case FTS_DNX:

if (!force)

error(ERROR_system(0), "%s: cannot search directory", ent->fts_path);

goto anyway;

case FTS_NS:

if (!force)

error(ERROR_system(0), "%s: not found", ent->fts_path);

break;

}

fts_close(fts);

if (ignore)

umask(ignore);

return error_info.errors != 0;

}