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Read shared-mime-info globs2 file for mime extensions #192

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Read shared-mime-info globs2 file for mime extensions #192

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60 changes: 54 additions & 6 deletions src/util/files.c
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@
#include <getopt.h>
#include <string.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <sys/stat.h> // open
#include <sys/types.h> // open
#include <stdlib.h> // exit
Expand Down Expand Up @@ -197,9 +198,8 @@ char *infer_mime_type_from_contents(const char *file_path) {
return res;
}

char *infer_mime_type_from_name(const char *file_path) {
const char *actual_ext = get_file_extension(file_path);
if (actual_ext == NULL) {
static char *search_mime_dot_types_for_ext(const char *ext) {
if (ext == NULL) {
return NULL;
}

Expand All @@ -212,7 +212,7 @@ char *infer_mime_type_from_name(const char *file_path) {
}

for (char line[200]; fgets(line, sizeof(line), f) != NULL;) {
/* Skip comments and black lines */
/* Skip comments and blank lines */
if (line[0] == '#' || line[0] == '\n') {
continue;
}
Expand All @@ -222,11 +222,12 @@ char *infer_mime_type_from_name(const char *file_path) {
int consumed;
if (sscanf(line, "%199s%n", mime_type, &consumed) != 1) {
/* A malformed line, perhaps? */
fprintf(stderr, "malformed mime.types line: %s\n", line);
continue;
}
char *lineptr = line + consumed;
for (char ext[200]; sscanf(lineptr, "%199s%n", ext, &consumed) == 1;) {
if (strcmp(ext, actual_ext) == 0) {
for (char ext_pattern[200]; sscanf(lineptr, "%199s%n", ext_pattern, &consumed) == 1;) {
if (strcmp(ext_pattern, ext) == 0) {
fclose(f);
return strdup(mime_type);
}
Expand All @@ -237,6 +238,53 @@ char *infer_mime_type_from_name(const char *file_path) {
return NULL;
}

static char *search_shared_mime_info_globs_for_filename(const char *filename) {
FILE *f = fopen("/usr/share/mime/globs2", "r");
if (f == NULL) {
f = fopen("/usr/local/share/mime/globs2", "r");
}
if (f == NULL) {
return NULL;
}

for (char line[200]; fgets(line, sizeof(line), f) != NULL;) {
/* Skip comments and blank lines */
if (line[0] == '#' || line[0] == '\n') {
continue;
}

/* Each line consists of colon-separated
* weight, mime type, and glob pattern.
* We ignore the weight.
*/
char mime_type[200];
char filename_glob[200];
if (sscanf(line, "%*d:%199[^:]:%199s\n", mime_type, filename_glob) != 2) {
/* A malformed line, perhaps? */
fprintf(stderr, "malformed globs2 line: %s\n", line);
continue;
}
if (fnmatch(filename_glob, filename, 0) == 0) {
fclose(f);
return strdup(mime_type);
}
}
fclose(f);
return NULL;
}

char *infer_mime_type_from_name(const char *file_path) {
const char *ext = get_file_extension(file_path);
char* file_path_dup = strdup(file_path);
const char *filename = basename(file_path_dup);
char* mime_type = search_shared_mime_info_globs_for_filename(filename);
if (!mime_type) {
mime_type = search_mime_dot_types_for_ext(ext);
}
free(file_path_dup);
return mime_type;
}

/* Returns the name of a new file */
char *dump_stdin_into_a_temp_file() {
/* Create a temp directory to host out file */
Expand Down