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comparison common/listutil.c @ 22:bc302bbceaf5

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Move listutil again
author Andre Heinecke <aheinecke@intevation.de>
date Thu, 20 Feb 2014 15:44:09 +0000
parents cinst/listutil.c@f4f957c58e0a
children e783fd99a9eb
comparison
equal deleted inserted replaced
21:dc1e1e9e62ce 22:bc302bbceaf5
1 #include "listutil.h"
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <errno.h>
6 #include <fcntl.h>
7 #include <unistd.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <string.h>
11
12 #define MAX_FILESIZE_KB 1024
13
14 void handle_errno()
15 {
16 printf("Error: %s \n", strerror(errno));
17 }
18
19 list_status_t readList(const char *fileName, char **data, size_t *size)
20 {
21 int fd = -1;
22 struct stat fileStat;
23 int rc = 0;
24 ssize_t bRead = 0;
25
26 memset(&fileStat, 0, sizeof(fileStat));
27
28 list_status_t retval = UnknownError;
29
30 fd = open(fileName, O_RDONLY);
31 if (fd == -1) {
32 handle_errno();
33 retval = StatFailed;
34 goto cleanup;
35 }
36
37 rc = fstat(fd, &fileStat);
38 if (rc < 0) {
39 printf ("Stat failed with rc: %i\n", rc);
40 retval = StatFailed;
41 goto cleanup;
42 }
43
44 // Check the size of the file
45 if (!fileStat.st_size) {
46 printf("Size zero\n");
47 retval = StatFailed;
48 goto cleanup;
49 }
50
51 if (fileStat.st_size / 1024 > MAX_FILESIZE_KB &&
52 fileStat.st_size > 0) {
53 printf("File too large\n");
54 retval = TooLarge;
55 goto cleanup;
56 }
57
58 *size = (size_t) fileStat.st_size;
59
60 *data = (char*) malloc(*size);
61
62 if (*data == NULL) {
63 printf("Malloc failed\n");
64 retval = UnknownError;
65 goto cleanup;
66 }
67
68 bRead = read(fd, *data, *size);
69
70 if (bRead < 0 || (size_t) bRead != *size) {
71 printf("Read failed\n");
72 if (bRead == -1) {
73 handle_errno();
74 }
75 retval = UnknownError;
76 *size = 0;
77 if (*data) {
78 free(*data);
79 printf("Nulling data\n");
80 *data = NULL;
81 }
82 goto cleanup;
83 }
84
85 retval = UnknownValidity;
86 cleanup:
87
88 if (fd && fd != -1) {
89 close(fd);
90 fd = -1;
91 }
92
93 return retval;
94 }
95
96 list_status_t readAndVerifyList(const char *fileName, char **data, size_t *size)
97 {
98 // int validSig = 0;
99 char * signature = NULL;
100
101 list_status_t retval = UnknownError;
102 *data = NULL;
103 *size = 0;
104
105 retval = readList(fileName, data, size);
106
107 if (retval != UnknownValidity) {
108 printf ("Readlist failed\n");
109 return retval;
110 }
111
112 if (!data || !*size) {
113 // should not have happend if readList works as specified
114 return UnknownError;
115 }
116
117 signature = *data;
118
119 if (*signature != 'S') {
120 printf("Does not start with S\n");
121 retval = InvalidFormat;
122 goto cleanup;
123 }
124
125 // TODO VERIFIY
126 retval = Valid;
127
128 // Maybe check if all bytes are < 127 and > 0
129
130 cleanup:
131 if (retval != Valid && *data) {
132 free(*data);
133 *data = NULL;
134 *size = 0;
135 }
136 return retval;
137 }
138
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