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1.1 root 1: /*
2: * The information contained herein is a trade secret of Mark Williams
3: * Company, and is confidential information. It is provided under a
4: * license agreement, and may be copied or disclosed only under the
5: * terms of that agreement. Any reproduction or disclosure of this
6: * material without the express written authorization of Mark Williams
7: * Company or persuant to the license agreement is unlawful.
8: *
9: * An unpublished work by Mark Williams Company, Chicago.
10: * All rights reserved.
11: */
12:
13: /*
14: * crontab.c
15: *
16: * Emulation of the SV crontab command.
17: *
18: * The next table shows conditions when user is allowed to use crontab.
19: *
20: * \ deny exist exist exist doesn't
21: * \ is user no user but empty exist
22: * allow \
23: * _______\________________________________________________________________
24: * exist |
25: * is user | Y Y Y Y
26: * ------------------------------------------------------------------------
27: * exist |
28: * no user | N N N N
29: * ------------------------------------------------------------------------
30: * doesn't|
31: * exist | N Y Y N
32: *
33: * Where deny means the file /usr/lib/cron/cron.deny, and allow is
34: * the file /usr/lib/cron/cron.allow
35: * This table is not valid for user root hwich can always use crontab.
36: *
37: * $ 12-06-1991 vlad (Vladimir Smelyansky)
38: *
39: */
40: #include <pwd.h>
41: #include <errno.h>
42: #include <stdio.h>
43: #include "cron.h"
44:
45: extern int iAllow(); /* Check permissions to use crontab */
46: extern void vDelete(); /* Delete user crontable */
47: extern void vList(); /* List user crontable */
48: extern void vMailDisable(); /* Disable the mail messages */
49: extern void vMailEnable(); /* Enable the mail messages */
50: extern void vReplace(); /* Replace user crontable */
51:
52: extern char *pcFileName; /* User crontab */
53:
54: char acRealUser[MAX_UNAME]; /* Real user name */
55: char *pcUserName; /* User name from a command line */
56: FILE *pfNewTab;
57: int lFlag = FALSE, /* List crontab */
58: rFlag = FALSE, /* Delete crontab */
59: fFlag = FALSE, /* Replace crontab */
60: uFlag = FALSE, /* User name */
61: mFlag = FALSE, /* Mail enable/disable */
62: ldrFlag = FALSE;
63:
64: main(argc, argv)
65: int argc;
66: char *argv[];
67: {
68: int iChar;
69: extern int optind;
70: extern char *optarg;
71:
72: /* Check if user allowed to use the crontab.
73: * NOTICE: iAllow finds real user name (acRealUser).
74: */
75: if (iAllow() != TRUE) {
76: fprintf(stderr, "Sorry, you are not authorized to use cron\n");
77: exit(1);
78: }
79:
80: /* Ok, we have permissions to execute it.
81: */
82: while((iChar = getopt(argc, argv, "u:lrf:m:")) != EOF) {
83: switch(iChar) {
84: case 'l': /* List crontab */
85: if (ldrFlag)
86: usage();
87: lFlag = ldrFlag = TRUE;
88: break;
89: case 'r': /* Remove crontab */
90: if (ldrFlag)
91: usage();
92: rFlag = ldrFlag = TRUE;
93: break;
94: case 'f': /* Replace crontab */
95: if (ldrFlag)
96: usage();
97: fFlag = ldrFlag = TRUE;
98: pcFileName = optarg;
99: Dprint("main: file is %s\n", pcFileName);
100: break;
101: case 'u': /* User name */
102: if (strcmp(acRealUser, optarg)) {
103: if (strcmp(acRealUser, "root")) {
104: fprintf(stderr,
105: "Sorry, you are not autorized edit '%s' crontab\n", pcUserName);
106: exit(1);
107: }
108: strncpy(acRealUser, optarg, MAX_UNAME);
109: }
110: break;
111: case 'm': /* Enable disable mail */
112: mFlag = TRUE;
113: switch(optarg[0]) {
114: case 'e':
115: Dprint("crontab: mail enable. %s\n", optarg);
116: vMailEnable();
117: break;
118: case 'd':
119: Dprint("crontab: mail disable. %s\n", optarg);
120: vMailDisable();
121: break;
122: default:
123: usage();
124: }
125: break;
126: case '?':
127: default:
128: usage();
129: }
130: }
131:
132: /* At least one option should be given.
133: */
134: if (ldrFlag == FALSE && mFlag == FALSE)
135: usage();
136:
137: if (lFlag) { /* List user crontab */
138: vList();
139: exit(0);
140: }
141: if (fFlag) { /* Replace user crontab */
142: Dprint("main: Case replace. User %s\n", acRealUser);
143: vReplace();
144: exit(0);
145: }
146: if (rFlag) { /* Remove user crontab */
147: vDelete();
148: exit(0);
149: }
150: exit(1);
151: }
152:
153: usage()
154: {
155: fprintf(stderr, "usage: crontab [-u user_name] ...\n");
156: fprintf(stderr, "\t\t-l list user's crontab\n");
157: fprintf(stderr, "\t\t-r remove user's crontab\n");
158: fprintf(stderr, "\t\t-f file_name replace user's crontab\n");
159: fprintf(stderr, "\t\t-m e[nable]/d[isable] enable/disable mail\n");
160: exit(1);
161: }
162:
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