aboutsummaryrefslogtreecommitdiff
path: root/debianutils/run_parts.c
blob: c9b0907172c15bd72d43d8e0c8db5c80c5203556 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* vi: set sw=4 ts=4: */
/*
 * Mini run-parts implementation for busybox
 *
 * Copyright (C) 2007 Bernhard Fischer
 *
 * Based on a older version that was in busybox which was 1k big..
 *   Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
 *
 * Based on the Debian run-parts program, version 1.15
 *   Copyright (C) 1996 Jeff Noxon <jeff@router.patch.net>,
 *   Copyright (C) 1996-1999 Guy Maor <maor@debian.org>
 *
 *
 * Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
 */

/* This is my first attempt to write a program in C (well, this is my first
 * attempt to write a program! :-) . */

/* This piece of code is heavily based on the original version of run-parts,
 * taken from debian-utils. I've only removed the long options and a the
 * report mode. As the original run-parts support only long options, I've
 * broken compatibility because the BusyBox policy doesn't allow them.
 * The supported options are:
 * -t           test. Print the name of the files to be executed, without
 *              execute them.
 * -a ARG       argument. Pass ARG as an argument the program executed. It can
 *              be repeated to pass multiple arguments.
 * -u MASK      umask. Set the umask of the program executed to MASK.
 */

#include "libbb.h"

struct globals {
	char **names;
	int    cur;
	char  *cmd[1];
};
#define G (*(struct globals*)&bb_common_bufsiz1)
#define names (G.names)
#define cur   (G.cur  )
#define cmd   (G.cmd  )

enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };

enum {
	OPT_r = (1 << 0),
	OPT_a = (1 << 1),
	OPT_u = (1 << 2),
	OPT_t = (1 << 3),
	OPT_l = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_FANCY,
};

#if ENABLE_FEATURE_RUN_PARTS_FANCY
#define list_mode (option_mask32 & OPT_l)
#else
#define list_mode 0
#endif

/* Is this a valid filename (upper/lower alpha, digits,
 * underscores, and hyphens only?)
 */
static bool invalid_name(const char *c)
{
	c = bb_basename(c);

	while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
		c++;

	return *c; /* TRUE (!0) if terminating NUL is not reached */
}

static int bb_alphasort(const void *p1, const void *p2)
{
	int r = strcmp(*(char **) p1, *(char **) p2);
	return (option_mask32 & OPT_r) ? -r : r;
}

static int act(const char *file, struct stat *statbuf, void *args ATTRIBUTE_UNUSED, int depth)
{
	if (depth == 1)
		return TRUE;

	if (depth == 2
	 && (  !(statbuf->st_mode & (S_IFREG | S_IFLNK))
	    || invalid_name(file)
	    || (!list_mode && access(file, X_OK) != 0))
	) {
		return SKIP;
	}

	names = xrealloc(names, (cur + 2) * sizeof(names[0]));
	names[cur++] = xstrdup(file);
	names[cur] = NULL;

	return TRUE;
}

#if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
static const char runparts_longopts[] ALIGN1 =
	"arg\0"     Required_argument "a"
	"umask\0"   Required_argument "u"
	"test\0"    No_argument       "t"
#if ENABLE_FEATURE_RUN_PARTS_FANCY
	"list\0"    No_argument       "l"
	"reverse\0" No_argument       "r"
//TODO: "verbose\0" No_argument       "v"
#endif
	;
#endif

int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int run_parts_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
	const char *umask_p = "22";
	llist_t *arg_list = NULL;
	unsigned n;
	int ret;

#if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
	applet_long_options = runparts_longopts;
#endif
	/* We require exactly one argument: the directory name */
	/* We require exactly one argument: the directory name */
	opt_complementary = "=1:a::";
	getopt32(argv, "ra:u:t"USE_FEATURE_RUN_PARTS_FANCY("l"), &arg_list, &umask_p);

	umask(xstrtou_range(umask_p, 8, 0, 07777));

	n = 1;
	while (arg_list && n < NUM_CMD) {
		cmd[n++] = llist_pop(&arg_list);
	}
	/* cmd[n] = NULL; - is already zeroed out */

	/* run-parts has to sort executables by name before running them */

	recursive_action(argv[optind],
			ACTION_RECURSE|ACTION_FOLLOWLINKS,
			act,            /* file action */
			act,            /* dir action */
			NULL,           /* user data */
			1               /* depth */
		);

	if (!names)
		return 0;

	qsort(names, cur, sizeof(char *), bb_alphasort);

	n = 0;
	while (1) {
		char *name = *names++;
		if (!name)
			break;
		if (option_mask32 & (OPT_t | OPT_l)) {
			puts(name);
			continue;
		}
		cmd[0] = name;
		ret = wait4pid(spawn(cmd));
		if (ret == 0)
			continue;
		n = 1;
		if (ret < 0)
			bb_perror_msg("can't exec %s", name);
		else /* ret > 0 */
			bb_error_msg("%s exited with code %d", name, ret);
	}

	return n;
}