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#define _GNU_SOURCE |
| 2 |
|
| 3 |
#include <stdlib.h> |
| 4 |
#include <string.h> |
| 5 |
#include <ctype.h> |
| 6 |
#include <unistd.h> |
| 7 |
#include <sys/types.h> |
| 8 |
#include <fnmatch.h> |
| 9 |
|
| 10 |
#include "fileutil.h" |
| 11 |
#include "ImageMapFile.h" |
| 12 |
|
| 13 |
#define WHITESPACE_CHARS " \t\n" |
| 14 |
#define QUOTING_CHARS "\"" |
| 15 |
#define ESCAPING_CHARS "\\" |
| 16 |
#define COMMENT_CHARS "#" |
| 17 |
#define WILD_CHARS '*' |
| 18 |
#define DIGIT_CHARS "0123456789" |
| 19 |
#define USERID_SEP_CHARS "," |
| 20 |
#define USERID_TERMINATOR_CHARS USERID_SEP_CHARS WHITESPACE_CHARS |
| 21 |
#define NUL '\0' |
| 22 |
#define USERID_CHUNK_SIZE 4 |
| 23 |
|
| 24 |
|
| 25 |
/****************************************************************************** |
| 26 |
Function: gridmap_parse_line |
| 27 |
Description: |
| 28 |
Given a line from the gridmap file, parse it returning |
| 29 |
a gridmap_line_t structure. line is modified during parsing. |
| 30 |
|
| 31 |
The format of the line is expected to be: |
| 32 |
|
| 33 |
<DN> <userid>[,<userid>[,<userid>...]] |
| 34 |
|
| 35 |
Leading and trailing whitespace is ignored. |
| 36 |
|
| 37 |
userids must only have a comma between them, no whitespace. |
| 38 |
|
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Anything after the userids is ignored. |
| 40 |
|
| 41 |
Anything after an unescaped comment character is ignored. |
| 42 |
|
| 43 |
Parameters: |
| 44 |
line, a pointer to the line from the file (NUL-terminated string) |
| 45 |
|
| 46 |
gline, a pointer to a pointer that will be set to point at |
| 47 |
the gridmap_line_t structure containing the line information. |
| 48 |
If the line contains no content, gline will be set to NULL. |
| 49 |
|
| 50 |
Returns: |
| 51 |
0 on success, non-zero on error. |
| 52 |
|
| 53 |
******************************************************************************/ |
| 54 |
static int gridmap_parse_line(char * line, gridmap_line_t ** gline); |
| 55 |
static int xdigit_to_value(char xdigit); |
| 56 |
static int gridmap_parse_globusid(const char * unparsed, char ** pparsed); |
| 57 |
static void gridmap_free_gridmap_line(gridmap_line_t *gline); |
| 58 |
static int match_dn(const char * dn, const char * match, unsigned short matching_type); |
| 59 |
|
| 60 |
static int match_dn(const char * match, const char * to_match, unsigned short matching_type) { |
| 61 |
if ( (matching_type&MATCH_WILD_CHARS) == MATCH_WILD_CHARS ){ |
| 62 |
return fnmatch(match, to_match, 0); |
| 63 |
} else { |
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return strcmp(match, to_match); |
| 65 |
} |
| 66 |
} |
| 67 |
|
| 68 |
gridmap_line_t * find_mapping(const gridmap_list_t * list, const char * to_match, unsigned short matching_type) { |
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const gridmap_list_t * current = list; |
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while (current != NULL){ |
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if (match_dn(current->line->match,to_match,matching_type) == 0) |
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return current->line; |
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current = current->next; |
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if (current == list) |
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break; |
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} |
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return NULL; |
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} |
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|
| 80 |
void gridmap_list_free(gridmap_list_t * list){ |
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gridmap_list_t * current = list; |
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gridmap_list_t * working = NULL; |
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while (current != NULL){ |
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working = current; |
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current = current->next; |
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|
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gridmap_free_gridmap_line(working->line); |
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free(working); |
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} |
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} |
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|
| 92 |
int parseImageMapFile(const char * image_map_file, gridmap_list_t ** list){ |
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gridmap_list_t * result = NULL; |
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gridmap_list_t * resultlast = NULL; |
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gridmap_list_t * resultnew = NULL; |
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gridmap_line_t * gline = NULL; |
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char * contents = NULL; |
| 98 |
char * linestart = NULL; |
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char * lineend = NULL; |
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int eof = 0; |
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int size; |
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|
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size = cgul_read_config(image_map_file, &contents, getuid(), getgid()); |
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if (size != 0){ |
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/*EEF_log(LOG_ERR,"Unable to safely open the image map file '%s', reason: %d (for an explenation of the reason look in cgul/fileutil/fileutil.h)",image_map_file,size);*/ |
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goto failure; |
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} |
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|
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linestart = contents; |
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while (eof == 0){ |
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lineend = linestart; |
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while (*lineend != '\n'){ |
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if (*lineend == '\0'){ |
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eof = 1; |
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break; |
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} |
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lineend++; |
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} |
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*lineend = '\0'; |
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|
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size = gridmap_parse_line(linestart, &gline); |
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linestart = lineend+1; |
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|
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/* error which is unrecoverable only will result in a non 0 value */ |
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if (size != 0) { |
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goto failure; |
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} |
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|
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/* line consisting of comment or whitespaces only */ |
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if (gline == NULL) |
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continue; |
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|
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resultnew = calloc(1,sizeof(gridmap_list_t)); |
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resultnew->line = gline; |
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|
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if (result == NULL){ |
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resultlast = result = resultnew; |
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} else { |
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resultlast->next = resultnew; |
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resultlast = resultnew; |
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} |
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/* be sure to point the last result to the actual last result in the list */ |
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while (resultlast->next != NULL) |
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resultlast = resultlast->next; |
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|
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gline = NULL; |
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resultnew = NULL; |
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} |
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|
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*list = result; |
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|
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return 0; |
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failure: |
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gridmap_free_gridmap_line(gline); |
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gline = NULL; |
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|
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free(contents); |
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contents = NULL; |
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|
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gridmap_list_free(result); |
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result = NULL; |
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resultlast = NULL; |
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|
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return -1; |
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} |
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|
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static int gridmap_parse_line(char * line, gridmap_line_t ** gline) { |
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charlist_t * mappings = NULL; |
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charlist_t * mappingsnew = NULL; |
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char * dn_end; |
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char * parsed_dn = NULL; |
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gridmap_line_t * gline_tmp = NULL; |
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|
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|
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/* Check arguments */ |
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if ((line == NULL) || (gline == NULL)) |
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goto error; |
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|
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/* Skip over leading whitespace */ |
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line += strspn(line, WHITESPACE_CHARS); |
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|
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/* Check for comment at start of line and ignore line if present */ |
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if (strchr(COMMENT_CHARS, *line) != NULL) { |
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/* Ignore line, return NULL gline */ |
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*gline = NULL; |
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return 0; |
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} |
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|
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/* Check for empty line */ |
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if (*line == NUL) { |
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/* Empty line, return NULL gline. */ |
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*gline = NULL; |
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return 0; |
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} |
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|
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/* Is DN quoted? */ |
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if (strchr(QUOTING_CHARS, *line) != NULL) { |
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/* |
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* Yes, skip over opening quote and look for unescaped |
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* closing double quote |
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*/ |
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line++; |
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dn_end = line; |
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while (strchr(QUOTING_CHARS, *dn_end) == NULL){ |
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if (strchr(ESCAPING_CHARS, *dn_end) != NULL) |
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dn_end++; |
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if (*dn_end == 0) |
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goto error; |
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dn_end++; |
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} |
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} else { |
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/* No, just find next whitespace */ |
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dn_end = line + strcspn(line, WHITESPACE_CHARS); |
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|
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if (*dn_end == NUL) |
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goto error; /* Nothing after DN */ |
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} |
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|
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/* NUL terminate DN and parse */ |
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*dn_end = NUL; |
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|
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if (gridmap_parse_globusid(line, &parsed_dn) != 0) |
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return -1; |
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|
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/* Skip over closing delim and any whitespace after DN */ |
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line = dn_end + 1; |
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line += strspn(line, WHITESPACE_CHARS); |
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|
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/* Parse list of unix user ID seperated by USERID_SEP_CHARS */ |
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while ((*line != NUL) && (strchr(WHITESPACE_CHARS, *line) == NULL)) { |
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int mapping_len; |
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char * mapping; |
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|
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/* Find end of this userid */ |
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mapping_len = strcspn(line, USERID_TERMINATOR_CHARS); |
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|
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mapping = strndup(line,mapping_len); |
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if (mapping == NULL) |
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goto error; |
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|
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mappingsnew = charlist_add_char_ptr_own(mappings, mapping); |
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/* test for the memory beeing available */ |
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if (mappingsnew == NULL){ |
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/* free the local char ptr */ |
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free(mapping); |
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|
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goto error; |
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} |
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|
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mappings = mappingsnew; |
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|
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line += mapping_len; |
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|
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/* If we're on a seperator character, skip over it */ |
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if (strchr(USERID_SEP_CHARS, *line) != NULL) |
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line++; |
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} |
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|
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/* |
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* There might be more stuff on the line, but we're ignoring |
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* it for now. |
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*/ |
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|
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/* Ok, build our gridmap_line_t structure */ |
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gline_tmp = malloc(sizeof(*gline_tmp)); |
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|
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if (gline_tmp == NULL) |
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goto error; |
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|
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gline_tmp->match = parsed_dn; |
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gline_tmp->mappings = mappings; |
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|
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*gline = gline_tmp; |
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|
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return 0; |
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|
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error: |
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free(parsed_dn); |
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parsed_dn = NULL; |
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|
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charlist_free(mappings); |
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|
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free(gline_tmp); |
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|
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return -1; |
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|
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} /* gridmap_parse_line() */ |
| 288 |
|
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/****************************************************************************** |
| 290 |
Function: gridmap_parse_globusid |
| 291 |
Description: |
| 292 |
Given a pointer to a string containing the globusid from the |
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gridmap file, return a pointer to a string containing the |
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parsed from of the id. |
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|
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Specifically handle backslashed characters - e.g. '\\', |
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'\x4a' or '\37'. |
| 298 |
|
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Parameters: |
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unparsed, pointer to unparsed string |
| 301 |
|
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pparsed, pointer to pointer that should be set to point at |
| 303 |
allocated parsed string |
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|
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Returns: |
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0 on success |
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non-zero on error. |
| 308 |
|
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******************************************************************************/ |
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static int gridmap_parse_globusid(const char * unparsed, char ** pparsed) { |
| 311 |
int escaped = 0; /* Is the current character escaped? (Previous char was backslash) */ |
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char * buffer = NULL; /* Buffer we are putting resulting name into */ |
| 313 |
int buffer_len = 0; /* Buffer's length in bytes */ |
| 314 |
int buffer_index = 0; /* And our current position in buffer */ |
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char unparsed_char; /* Character we're currently looking at */ |
| 316 |
|
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|
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/* Check input parameters for legality */ |
| 319 |
if ((unparsed == NULL) || (pparsed == NULL)) |
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return -1; |
| 321 |
|
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buffer_len = strlen(unparsed); |
| 323 |
buffer = malloc(buffer_len); |
| 324 |
if (buffer == NULL) |
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return -1; |
| 326 |
|
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/* Walk through the name, parsing as we go */ |
| 328 |
while ((unparsed_char = *(unparsed++)) != NUL){ |
| 329 |
/* Unescaped backslash */ |
| 330 |
if (strchr(ESCAPING_CHARS, unparsed_char) && !escaped) { |
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escaped = 1; |
| 332 |
continue; |
| 333 |
} |
| 334 |
|
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/* Escaped hex character - e.g. '\xfe' */ |
| 336 |
if ((unparsed_char == 'x') && escaped) { |
| 337 |
if (isxdigit(*unparsed) && isxdigit(*(unparsed + 1))) { |
| 338 |
/* Set unparsed_char to value represented by hex value */ |
| 339 |
unparsed_char = (xdigit_to_value(*unparsed) << 4) + xdigit_to_value(*(unparsed + 1)); |
| 340 |
unparsed += 2; |
| 341 |
} |
| 342 |
/* else just fall through */ |
| 343 |
} |
| 344 |
|
| 345 |
/* |
| 346 |
* Ok, we now have the character in unparsed_char to be appended |
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* to our output string. |
| 348 |
* |
| 349 |
* First, make sure we have enough room in our output buffer. |
| 350 |
*/ |
| 351 |
if ((buffer_index + 1 /* for NUL */) >= buffer_len) { |
| 352 |
/* Grow buffer */ |
| 353 |
char *tmp_buffer; |
| 354 |
buffer_len *= 2; |
| 355 |
tmp_buffer = realloc(buffer, buffer_len); |
| 356 |
if (tmp_buffer == NULL) { |
| 357 |
free(buffer); |
| 358 |
return -1; |
| 359 |
} |
| 360 |
buffer = tmp_buffer; |
| 361 |
} |
| 362 |
|
| 363 |
buffer[buffer_index++] = unparsed_char; |
| 364 |
buffer[buffer_index] = NUL; |
| 365 |
|
| 366 |
escaped = 0; |
| 367 |
} |
| 368 |
|
| 369 |
/* XXX What if escaped == 1 here? */ |
| 370 |
/* Success */ |
| 371 |
|
| 372 |
*pparsed = buffer; |
| 373 |
|
| 374 |
return 0; |
| 375 |
|
| 376 |
} /* gridmap_parse_globusid() */ |
| 377 |
|
| 378 |
/****************************************************************************** |
| 379 |
Function: xdigit_to_value |
| 380 |
Description: |
| 381 |
Convert a ascii character representing a hexadecimal digit |
| 382 |
into a integer. |
| 383 |
|
| 384 |
Parameters: |
| 385 |
xdigit, character contain the hex digit. |
| 386 |
|
| 387 |
Returns: |
| 388 |
value contained in xdigit, or -1 on error. |
| 389 |
|
| 390 |
******************************************************************************/ |
| 391 |
|
| 392 |
static int xdigit_to_value(char xdigit) { |
| 393 |
if ((xdigit >= '0') && (xdigit <= '9')) |
| 394 |
return (xdigit - '0'); |
| 395 |
if ((xdigit >= 'a') && (xdigit <= 'f')) |
| 396 |
return (xdigit - 'a' + 0xa); |
| 397 |
if ((xdigit >= 'A') && (xdigit <= 'F')) |
| 398 |
return (xdigit - 'A' + 0xa); |
| 399 |
/* Illegal digit */ |
| 400 |
return -1; |
| 401 |
} /* xdigit_to_value() */ |
| 402 |
|
| 403 |
/****************************************************************************** |
| 404 |
Function: gridmap_free_gridmap_line |
| 405 |
Description: |
| 406 |
Frees all memory allocated to a gridmap_line_t structure. |
| 407 |
|
| 408 |
Parameters: |
| 409 |
gline, pointer to structure to be freed. |
| 410 |
|
| 411 |
Returns: |
| 412 |
Nothing. |
| 413 |
******************************************************************************/ |
| 414 |
static void gridmap_free_gridmap_line(gridmap_line_t *gline) { |
| 415 |
if (gline == NULL) |
| 416 |
return; |
| 417 |
|
| 418 |
free(gline->match); |
| 419 |
gline->match = NULL; |
| 420 |
|
| 421 |
charlist_free(gline->mappings); |
| 422 |
gline->mappings = NULL; |
| 423 |
|
| 424 |
free(gline); |
| 425 |
} /* gridmap_free_gridmap_line() */ |
| 426 |
|
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