/* install - copy files and set attributes Copyright (C) 1989, 1990, 1991, 1995 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Copy files and set their permission modes and, if possible, their owner and group. Used similarly to `cp'; typically used in Makefiles to copy programs into their destination directories. It can also be used to create the destination directories and any leading directories, and to set the final directory's modes. It refuses to copy files onto themselves. Options: -g, --group=GROUP Set the group ownership of the installed file or directory to the group ID of GROUP (default is process's current group). GROUP may also be a numeric group ID. -m, --mode=MODE Set the permission mode for the installed file or directory to MODE, which is an octal number (default is 0755). -o, --owner=OWNER If run as root, set the ownership of the installed file to the user ID of OWNER (default is root). OWNER may also be a numeric user ID. -c No effect. For compatibility with old Unix versions of install. -s, --strip Strip the symbol tables from installed files. -d, --directory Create a directory and its leading directories, if they do not already exist. Set the owner, group and mode as given on the command line. Any leading directories that are created are also given those attributes. This is different from the SunOS 4.0 install, which gives directories that it creates the default attributes. David MacKenzie */ #include #include #include #include #include #include #include "system.h" #include "version.h" #include "modechange.h" #include "makepath.h" #include "error.h" #if HAVE_SYS_WAIT_H #include #endif struct passwd *getpwnam (); struct group *getgrnam (); #ifndef _POSIX_VERSION uid_t getuid (); gid_t getgid (); int wait (); #endif #ifndef HAVE_ENDGRENT # define endgrent() ((void) 0) #endif #ifndef HAVE_ENDPWENT # define endpwent() ((void) 0) #endif /* True if C is an ASCII octal digit. */ #define isodigit(c) ((c) >= '0' && c <= '7') /* Number of bytes of a file to copy at a time. */ #define READ_SIZE (32 * 1024) char *basename (); char *stpcpy (); char *xmalloc (); int safe_read (); int full_write (); int isdir (); static int change_attributes __P ((char *path, int no_need_to_chown)); static int copy_file __P ((char *from, char *to, int *to_created)); static int install_file_in_dir __P ((char *from, char *to_dir)); static int install_file_in_file __P ((char *from, char *to)); static void get_ids __P ((void)); static void strip __P ((char *path)); static void usage __P ((int status)); /* The name this program was run with, for error messages. */ char *program_name; /* The user name that will own the files, or NULL to make the owner the current user ID. */ static char *owner_name; /* The user ID corresponding to `owner_name'. */ static uid_t owner_id; /* The group name that will own the files, or NULL to make the group the current group ID. */ static char *group_name; /* The group ID corresponding to `group_name'. */ static gid_t group_id; /* The permissions to which the files will be set. The umask has no effect. */ static int mode; /* If nonzero, strip executable files after copying them. */ static int strip_files; /* If nonzero, install a directory instead of a regular file. */ static int dir_arg; /* If non-zero, display usage information and exit. */ static int show_help; /* If non-zero, print the version on standard output and exit. */ static int show_version; static struct option const long_options[] = { {"strip", no_argument, NULL, 's'}, {"directory", no_argument, NULL, 'd'}, {"group", required_argument, NULL, 'g'}, {"mode", required_argument, NULL, 'm'}, {"owner", required_argument, NULL, 'o'}, {"help", no_argument, &show_help, 1}, {"version", no_argument, &show_version, 1}, {NULL, 0, NULL, 0} }; void main (int argc, char **argv) { int optc; int errors = 0; char *symbolic_mode = NULL; program_name = argv[0]; owner_name = NULL; group_name = NULL; mode = 0755; strip_files = 0; dir_arg = 0; umask (0); while ((optc = getopt_long (argc, argv, "csdg:m:o:", long_options, (int *) 0)) != EOF) { switch (optc) { case 0: break; case 'c': break; case 's': strip_files = 1; break; case 'd': dir_arg = 1; break; case 'g': group_name = optarg; break; case 'm': symbolic_mode = optarg; break; case 'o': owner_name = optarg; break; default: usage (1); } } if (show_version) { printf ("install - %s\n", version_string); exit (0); } if (show_help) usage (0); /* Check for invalid combinations of arguments. */ if (dir_arg && strip_files) error (1, 0, "the strip option may not be used when installing a directory"); if (optind == argc || (optind == argc - 1 && !dir_arg)) { error (0, 0, "too few arguments"); usage (1); } if (symbolic_mode) { struct mode_change *change = mode_compile (symbolic_mode, 0); if (change == MODE_INVALID) error (1, 0, "invalid mode `%s'", symbolic_mode); else if (change == MODE_MEMORY_EXHAUSTED) error (1, 0, "virtual memory exhausted"); mode = mode_adjust (0, change); } get_ids (); if (dir_arg) { for (; optind < argc; ++optind) { errors |= make_path (argv[optind], mode, mode, owner_id, group_id, 0, NULL); } } else { if (optind == argc - 2) { if (!isdir (argv[argc - 1])) errors = install_file_in_file (argv[argc - 2], argv[argc - 1]); else errors = install_file_in_dir (argv[argc - 2], argv[argc - 1]); } else { if (!isdir (argv[argc - 1])) usage (1); for (; optind < argc - 1; ++optind) { errors |= install_file_in_dir (argv[optind], argv[argc - 1]); } } } exit (errors); } /* Copy file FROM onto file TO and give TO the appropriate attributes. Return 0 if successful, 1 if an error occurs. */ static int install_file_in_file (char *from, char *to) { int to_created; int no_need_to_chown; if (copy_file (from, to, &to_created)) return 1; if (strip_files) strip (to); no_need_to_chown = (to_created && owner_name == NULL && group_name == NULL); return change_attributes (to, no_need_to_chown); } /* Copy file FROM into directory TO_DIR, keeping its same name, and give the copy the appropriate attributes. Return 0 if successful, 1 if not. */ static int install_file_in_dir (char *from, char *to_dir) { char *from_base; char *to; int ret; from_base = basename (from); to = xmalloc ((unsigned) (strlen (to_dir) + strlen (from_base) + 2)); stpcpy (stpcpy (stpcpy (to, to_dir), "/"), from_base); ret = install_file_in_file (from, to); free (to); return ret; } /* A chunk of a file being copied. */ static char buffer[READ_SIZE]; /* Copy file FROM onto file TO, creating TO if necessary. Return 0 if the copy is successful, 1 if not. If the copy is successful, set *TO_CREATED to non-zero if TO was created (if it did not exist or did, but was unlinked) and to zero otherwise. If the copy fails, don't modify *TO_CREATED. */ static int copy_file (char *from, char *to, int *to_created) { int fromfd, tofd; int bytes; int ret = 0; struct stat from_stats, to_stats; int target_created = 1; if (stat (from, &from_stats)) { error (0, errno, "%s", from); return 1; } if (!S_ISREG (from_stats.st_mode)) { error (0, 0, "`%s' is not a regular file", from); return 1; } if (stat (to, &to_stats) == 0) { if (!S_ISREG (to_stats.st_mode)) { error (0, 0, "`%s' is not a regular file", to); return 1; } if (from_stats.st_dev == to_stats.st_dev && from_stats.st_ino == to_stats.st_ino) { error (0, 0, "`%s' and `%s' are the same file", from, to); return 1; } /* If unlink fails, try to proceed anyway. */ if (unlink (to)) target_created = 0; } fromfd = open (from, O_RDONLY, 0); if (fromfd == -1) { error (0, errno, "%s", from); return 1; } /* Make sure to open the file in a mode that allows writing. */ tofd = open (to, O_WRONLY | O_CREAT | O_TRUNC, 0600); if (tofd == -1) { error (0, errno, "%s", to); close (fromfd); return 1; } while ((bytes = safe_read (fromfd, buffer, READ_SIZE)) > 0) if (full_write (tofd, buffer, bytes) < 0) { error (0, errno, "%s", to); goto copy_error; } if (bytes == -1) { error (0, errno, "%s", from); goto copy_error; } if (close (fromfd) < 0) { error (0, errno, "%s", from); ret = 1; } if (close (tofd) < 0) { error (0, errno, "%s", to); ret = 1; } if (ret == 0) *to_created = target_created; return ret; copy_error: close (fromfd); close (tofd); return 1; } /* Set the attributes of file or directory PATH. If NO_NEED_TO_CHOWN is non-zero, don't call chown. Return 0 if successful, 1 if not. */ static int change_attributes (char *path, int no_need_to_chown) { int err = 0; /* chown must precede chmod because on some systems, chown clears the set[ug]id bits for non-superusers, resulting in incorrect permissions. On System V, users can give away files with chown and then not be able to chmod them. So don't give files away. We don't pass -1 to chown to mean "don't change the value" because SVR3 and earlier non-BSD systems don't support that. We don't normally ignore errors from chown because the idea of the install command is that the file is supposed to end up with precisely the attributes that the user specified (or defaulted). If the file doesn't end up with the group they asked for, they'll want to know. But AFS returns EPERM when you try to change a file's group; thus the kludge. */ if (!no_need_to_chown && chown (path, owner_id, group_id) #ifdef AFS && errno != EPERM #endif ) err = errno; if (chmod (path, mode)) err = errno; if (err) { error (0, err, "%s", path); return 1; } return 0; } /* Strip the symbol table from the file PATH. We could dig the magic number out of the file first to determine whether to strip it, but the header files and magic numbers vary so much from system to system that making it portable would be very difficult. Not worth the effort. */ static void strip (char *path) { int pid, status; pid = fork (); switch (pid) { case -1: error (1, errno, "cannot fork"); break; case 0: /* Child. */ execlp ("strip", "strip", path, (char *) NULL); error (1, errno, "cannot run strip"); break; default: /* Parent. */ /* Parent process. */ while (pid != wait (&status)) /* Wait for kid to finish. */ /* Do nothing. */ ; break; } } /* Return nonzero if STR is an ASCII representation of a nonzero decimal integer, zero if not. */ static int is_number (char *str) { if (*str == 0) return 0; for (; *str; str++) if (!ISDIGIT (*str)) return 0; return 1; } /* Initialize the user and group ownership of the files to install. */ static void get_ids (void) { struct passwd *pw; struct group *gr; if (owner_name) { pw = getpwnam (owner_name); if (pw == NULL) { if (!is_number (owner_name)) error (1, 0, "invalid user `%s'", owner_name); /* FIXME: atoi won't warn about overflow. Use xstrtoul. */ /* FIXME: eliminate is_number altogether! */ owner_id = atoi (owner_name); } else owner_id = pw->pw_uid; endpwent (); } else owner_id = getuid (); if (group_name) { gr = getgrnam (group_name); if (gr == NULL) { if (!is_number (group_name)) error (1, 0, "invalid group `%s'", group_name); /* FIXME: atoi won't warn about overflow. Use xstrtoul. */ group_id = atoi (group_name); } else group_id = gr->gr_gid; endgrent (); } else group_id = getgid (); } static void usage (int status) { if (status != 0) fprintf (stderr, "Try `%s --help' for more information.\n", program_name); else { printf ("\ Usage: %s [OPTION]... SOURCE DEST (1st format)\n\ or: %s [OPTION]... SOURCE... DIRECTORY (2nd format)\n\ or: %s -d [OPTION]... DIRECTORY... (3nd format)\n\ ", program_name, program_name, program_name); printf ("\ In first two formats, copy SOURCE to DEST or multiple SOURCE(s) to\n\ DIRECTORY, while setting permission modes and owner/group. In third\n\ format, make all components of the given DIRECTORY(ies).\n\ \n\ -c (ignored)\n\ -d, --directory create [leading] directories, mandatory for 3rd format\n\ -g, --group=GROUP set group ownership, instead of process' current group\n\ -m, --mode=MODE set permission mode (as in chmod), instead of rw-r--r--\n\ -o, --owner=OWNER set ownership (super-user only)\n\ -s, --strip strip symbol tables, only for 1st and 2nd formats\n\ --help display this help and exit\n\ --version output version information and exit\n"); } exit (status); }