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include cleanups: remove unused headers and add feature test macros
[oweals/musl.git]
/
src
/
misc
/
get_current_dir_name.c
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <unistd.h>
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#include <sys/stat.h>
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char *get_current_dir_name(void) {
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struct stat a, b;
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char buf[PATH_MAX];
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char *res = getenv("PWD");
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if (res && *res && !stat(res, &a) && !stat(".", &b)
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&& (a.st_dev == b.st_dev) && (a.st_ino == b.st_ino))
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return strdup(res);
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if(!getcwd(buf, sizeof(buf))) return NULL;
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return strdup(buf);
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}