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https://https.git.savannah.gnu.org/git/patch.git
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f266434caf
* cfg.mk: New file, to configure maint.mk. * Makefile.am (EXTRA_DIST): Add, so the new file is distributed. (config_h_header): Define, to make the sc_require_config_h_first syntax-check test pass. * pc/chdirsaf.c: Include <config.h>.
36 lines
580 B
C
36 lines
580 B
C
/* A safer version of chdir, which returns back to the
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initial working directory when the program exits. */
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#include <config.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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static char *initial_wd;
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static void
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restore_wd (void)
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{
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chdir (initial_wd);
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}
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int
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chdir_safer (char const *dir)
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{
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if (! initial_wd)
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{
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size_t s;
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for (s = 256; ! (initial_wd = getcwd (0, s)); s *= 2)
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if (errno != ERANGE)
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return -1;
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if (atexit (restore_wd) != 0)
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{
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free (initial_wd);
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initial_wd = 0;
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return -1;
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}
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}
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return chdir (dir);
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}
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