]>
git.ipfire.org Git - thirdparty/cups.git/blob - scheduler/cups-exec.c
2 * Sandbox helper for CUPS.
4 * Copyright 2007-2014 by Apple Inc.
6 * Licensed under Apache License v2.0. See the file "LICENSE" for more information.
10 * cups-exec /path/to/profile [-u UID] [-g GID] [-n NICE] /path/to/program argv0 argv1 ... argvN
14 * Include necessary headers...
17 #include <cups/string-private.h>
18 #include <cups/file.h>
25 # ifndef SANDBOX_NAMED_EXTERNAL
26 # define SANDBOX_NAMED_EXTERNAL 0x0003
27 # endif /* !SANDBOX_NAMED_EXTERNAL */
28 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
29 #endif /* HAVE_SANDBOX_H */
36 static void usage(void) _CUPS_NORETURN
;
40 * 'main()' - Apply sandbox profile and execute program.
43 int /* O - Exit status */
44 main(int argc
, /* I - Number of command-line args */
45 char *argv
[]) /* I - Command-line arguments */
47 int i
; /* Looping var */
48 const char *opt
; /* Current option character */
49 uid_t uid
= getuid(); /* UID */
50 gid_t gid
= getgid(); /* GID */
51 int niceval
= 0; /* Nice value */
53 char *sandbox_error
= NULL
; /* Sandbox error, if any */
54 #endif /* HAVE_SANDBOX_H */
58 * Parse command-line...
61 for (i
= 1; i
< argc
; i
++)
63 if (argv
[i
][0] == '-')
65 for (opt
= argv
[i
] + 1; *opt
; opt
++)
69 case 'g' : /* -g gid */
74 gid
= (gid_t
)atoi(argv
[i
]);
77 case 'n' : /* -n nice-value */
82 niceval
= atoi(argv
[i
]);
85 case 'u' : /* -g gid */
90 uid
= (uid_t
)atoi(argv
[i
]);
94 fprintf(stderr
, "cups-exec: Unknown option '-%c'.\n", *opt
);
104 * Check that we have enough arguments...
109 fputs("cups-exec: Insufficient arguments.\n", stderr
);
114 * Make sure side and back channel FDs are non-blocking...
117 fcntl(3, F_SETFL
, O_NDELAY
);
118 fcntl(4, F_SETFL
, O_NDELAY
);
121 * Change UID, GID, and nice value...
132 if (setgroups(1, &gid
))
135 if (uid
&& setuid(uid
))
141 #ifdef HAVE_SANDBOX_H
143 * Run in a separate security profile...
146 if (strcmp(argv
[i
], "none") &&
147 sandbox_init(argv
[i
], SANDBOX_NAMED_EXTERNAL
, &sandbox_error
))
149 cups_file_t
*fp
; /* File */
150 char line
[1024]; /* Line from file */
151 int linenum
= 0; /* Line number in file */
153 fprintf(stderr
, "DEBUG: sandbox_init failed: %s (%s)\n", sandbox_error
,
155 sandbox_free_error(sandbox_error
);
157 if ((fp
= cupsFileOpen(argv
[i
], "r")) != NULL
)
159 while (cupsFileGets(fp
, line
, sizeof(line
)))
162 fprintf(stderr
, "DEBUG: %4d %s\n", linenum
, line
);
167 return (100 + EINVAL
);
169 #endif /* HAVE_SANDBOX_H */
172 * Execute the program...
175 execv(argv
[i
+ 1], argv
+ i
+ 2);
178 * If we get here, execv() failed...
181 fprintf(stderr
, "DEBUG: execv failed: %s\n", strerror(errno
));
182 return (errno
+ 100);
187 * 'usage()' - Show program usage.
193 fputs("Usage: cups-exec [-g gid] [-n nice-value] [-u uid] /path/to/profile /path/to/program argv0 argv1 ... argvN\n", stderr
);