326 lines
8.0 KiB
C
326 lines
8.0 KiB
C
/* getfacl.c
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Written by Corinna Vinschen <vinschen@redhat.com>
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include <pwd.h>
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#include <grp.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <cygwin/acl.h>
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#include <sys/stat.h>
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#include <cygwin/version.h>
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#include <string.h>
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#include <errno.h>
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static char *prog_name;
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char *
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permstr (mode_t perm)
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{
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static char pbuf[4];
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pbuf[0] = (perm & S_IROTH) ? 'r' : '-';
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pbuf[1] = (perm & S_IWOTH) ? 'w' : '-';
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pbuf[2] = (perm & S_IXOTH) ? 'x' : '-';
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pbuf[3] = '\0';
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return pbuf;
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}
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const char *
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username (uid_t uid)
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{
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static char ubuf[256];
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struct passwd *pw;
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if ((pw = getpwuid (uid)))
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strcpy (ubuf, pw->pw_name);
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else
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sprintf (ubuf, "%lu <unknown>", (unsigned long)uid);
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return ubuf;
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}
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const char *
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groupname (gid_t gid)
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{
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static char gbuf[256];
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struct group *gr;
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if ((gr = getgrgid (gid)))
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strcpy (gbuf, gr->gr_name);
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else
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sprintf (gbuf, "%lu <unknown>", (unsigned long)gid);
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return gbuf;
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}
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static void
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usage (FILE * stream)
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{
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fprintf (stream, "Usage: %s [-adn] FILE [FILE2...]\n"
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"\n"
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"Display file and directory access control lists (ACLs).\n"
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"\n"
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" -a, --access display the file access control list only\n"
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" -d, --default display the default access control list only\n"
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" -c, --omit-header do not display the comment header\n"
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" -e, --all-effective print all effective rights\n"
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" -E, --no-effective print no effective rights\n"
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" -n, --numeric print numeric user/group identifiers\n"
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" -V, --version print version and exit\n"
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" -h, --help this help text\n"
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"\n"
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"When multiple files are specified on the command line, a blank\n"
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"line separates the ACLs for each file.\n", prog_name);
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if (stream == stdout)
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{
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fprintf (stream, ""
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"For each argument that is a regular file, special file or\n"
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"directory, getfacl displays the owner, the group, and the ACL.\n"
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"For directories getfacl displays additionally the default ACL.\n"
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"\n"
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"With no options specified, getfacl displays the filename, the\n"
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"owner, the group, the setuid (s), setgid (s), and sticky (t)\n"
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"bits if available, and both the ACL and the default ACL, if it\n"
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"exists.\n"
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"\n"
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"The format for ACL output is as follows:\n"
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" # file: filename\n"
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" # owner: name or uid\n"
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" # group: name or uid\n"
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" # flags: sst\n"
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" user::perm\n"
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" user:name or uid:perm\n"
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" group::perm\n"
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" group:name or gid:perm\n"
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" mask:perm\n"
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" other:perm\n"
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" default:user::perm\n"
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" default:user:name or uid:perm\n"
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" default:group::perm\n"
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" default:group:name or gid:perm\n"
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" default:mask:perm\n"
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" default:other:perm\n"
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"\n");
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}
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}
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struct option longopts[] = {
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{"access", no_argument, NULL, 'a'},
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{"all", no_argument, NULL, 'a'},
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{"omit-header", no_argument, NULL, 'c'},
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{"all-effective", no_argument, NULL, 'e'},
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{"no-effective", no_argument, NULL, 'E'},
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{"default", no_argument, NULL, 'd'},
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{"dir", no_argument, NULL, 'd'},
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{"help", no_argument, NULL, 'h'},
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{"noname", no_argument, NULL, 'n'}, /* Backward compat */
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{"numeric", no_argument, NULL, 'n'},
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{"version", no_argument, NULL, 'V'},
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{0, no_argument, NULL, 0}
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};
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const char *opts = "acdeEhnV";
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static void
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print_version ()
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{
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printf ("getfacl (cygwin) %d.%d.%d\n"
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"Get POSIX ACL information\n"
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"Copyright (C) 2000 - %s Cygwin Authors\n"
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"This is free software; see the source for copying conditions. There is NO\n"
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"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
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CYGWIN_VERSION_DLL_MAJOR / 1000,
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CYGWIN_VERSION_DLL_MAJOR % 1000,
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CYGWIN_VERSION_DLL_MINOR,
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strrchr (__DATE__, ' ') + 1);
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}
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int
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main (int argc, char **argv)
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{
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int c;
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int ret = 0;
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int aopt = 0;
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int copt = 0;
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int eopt = 0;
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int dopt = 0;
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int nopt = 0;
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int istty = isatty (fileno (stdout));
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struct stat st;
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aclent_t acls[MAX_ACL_ENTRIES];
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prog_name = program_invocation_short_name;
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while ((c = getopt_long (argc, argv, opts, longopts, NULL)) != EOF)
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switch (c)
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{
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case 'a':
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aopt = 1;
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break;
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case 'c':
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copt = 1;
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break;
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case 'd':
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dopt = 1;
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break;
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case 'e':
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eopt = 1;
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break;
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case 'E':
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eopt = -1;
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break;
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case 'h':
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usage (stdout);
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return 0;
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case 'n':
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nopt = 1;
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break;
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case 'V':
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print_version ();
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return 0;
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default:
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fprintf (stderr, "Try `%s --help' for more information.\n", prog_name);
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return 1;
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}
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if (optind > argc - 1)
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{
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usage (stderr);
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return 1;
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}
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for (; optind < argc; ++optind)
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{
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int i, num_acls;
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mode_t mask = S_IRWXO, def_mask = S_IRWXO;
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if (stat (argv[optind], &st)
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|| (num_acls = acl (argv[optind], GETACL, MAX_ACL_ENTRIES, acls)) < 0)
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{
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fprintf (stderr, "%s: %s: %s\n",
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prog_name, argv[optind], strerror (errno));
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ret = 2;
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continue;
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}
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if (!copt)
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{
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printf ("# file: %s\n", argv[optind]);
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if (nopt)
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{
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printf ("# owner: %lu\n", (unsigned long)st.st_uid);
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printf ("# group: %lu\n", (unsigned long)st.st_gid);
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}
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else
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{
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printf ("# owner: %s\n", username (st.st_uid));
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printf ("# group: %s\n", groupname (st.st_gid));
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}
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if (st.st_mode & (S_ISUID | S_ISGID | S_ISVTX))
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printf ("# flags: %c%c%c\n", (st.st_mode & S_ISUID) ? 's' : '-',
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(st.st_mode & S_ISGID) ? 's' : '-',
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(st.st_mode & S_ISVTX) ? 't' : '-');
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}
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for (i = 0; i < num_acls; ++i)
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{
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if (acls[i].a_type == CLASS_OBJ)
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mask = acls[i].a_perm;
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else if (acls[i].a_type == DEF_CLASS_OBJ)
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def_mask = acls[i].a_perm;
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}
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for (i = 0; i < num_acls; ++i)
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{
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int n = 0;
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int print_effective = 0;
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mode_t effective = acls[i].a_perm;
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if (acls[i].a_type & ACL_DEFAULT)
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{
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if (aopt)
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continue;
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n += printf ("default:");
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}
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else if (dopt)
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continue;
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switch (acls[i].a_type & ~ACL_DEFAULT)
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{
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case USER_OBJ:
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printf ("user::");
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break;
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case USER:
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if (nopt)
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n += printf ("user:%lu:", (unsigned long)acls[i].a_id);
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else
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n += printf ("user:%s:", username (acls[i].a_id));
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break;
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case GROUP_OBJ:
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n += printf ("group::");
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break;
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case GROUP:
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if (nopt)
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n += printf ("group:%lu:", (unsigned long)acls[i].a_id);
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else
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n += printf ("group:%s:", groupname (acls[i].a_id));
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break;
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case CLASS_OBJ:
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printf ("mask:");
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break;
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case OTHER_OBJ:
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printf ("other:");
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break;
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}
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n += printf ("%s", permstr (acls[i].a_perm));
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switch (acls[i].a_type)
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{
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case USER:
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case GROUP_OBJ:
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effective = acls[i].a_perm & mask;
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print_effective = 1;
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break;
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case GROUP:
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/* Special case SYSTEM and Admins group: The mask only
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applies to them as far as the execute bit is concerned. */
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if (acls[i].a_id == 18 || acls[i].a_id == 544)
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effective = acls[i].a_perm & (mask | S_IROTH | S_IWOTH);
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else
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effective = acls[i].a_perm & mask;
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print_effective = 1;
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break;
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case DEF_USER:
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case DEF_GROUP_OBJ:
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effective = acls[i].a_perm & def_mask;
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print_effective = 1;
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break;
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case DEF_GROUP:
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/* Special case SYSTEM and Admins group: The mask only
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applies to them as far as the execute bit is concerned. */
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if (acls[i].a_id == 18 || acls[i].a_id == 544)
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effective = acls[i].a_perm & (def_mask | S_IROTH | S_IWOTH);
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else
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effective = acls[i].a_perm & def_mask;
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print_effective = 1;
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break;
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}
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if (print_effective && eopt >= 0
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&& (eopt > 0 || effective != acls[i].a_perm))
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{
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if (istty)
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{
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n = 40 - n;
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if (n <= 0)
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n = 1;
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printf ("%*s", n, " ");
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}
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else
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putchar ('\t');
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printf ("#effective:%s", permstr (effective));
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}
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putchar ('\n');
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}
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putchar ('\n');
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}
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return ret;
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}
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