47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
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// Written by retoor@molodetz.nl
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// This header file contains utility functions for manipulating file system paths, focusing primarily on expanding paths starting with '~' to the home directory.
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// This code uses standard libraries: stdio.h, stdlib.h, and string.h, and conditionally includes the posix libraries pwd.h and unistd.h when expanding the home directory manually.
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// MIT License
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//
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// Permission is granted to use, copy, modify, merge, distribute, sublicense, and/or sell copies of the Software.
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// The license includes conditions about providing a copy of the license and the limitation of liability and warranty.
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#ifndef UTILS_H
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#define UTILS_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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char* expand_home_directory(const char* path) {
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if (path == NULL) return NULL;
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if (path[0] == '~' && path[1] == '/') {
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const char* home_dir = getenv("HOME");
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if (home_dir == NULL) {
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#include <pwd.h>
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#include <unistd.h>
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struct passwd* pw = getpwuid(getuid());
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if (pw == NULL) return NULL;
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home_dir = pw->pw_dir;
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}
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size_t home_len = strlen(home_dir);
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size_t path_len = strlen(path) - 1;
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char* expanded_path = malloc(home_len + path_len + 1);
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if (expanded_path == NULL) return NULL;
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strcpy(expanded_path, home_dir);
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strcat(expanded_path, path + 1);
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return expanded_path;
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} else {
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return strdup(path);
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}
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}
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#endif
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