42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/*
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* Copyright (c) 2011, 2012, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* unistd/get_current_dir_name.c
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* Returns the current working directory.
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*/
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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// TODO: This interface should removed as its $PWD use is not thread safe.
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char* get_current_dir_name(void)
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{
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const char* pwd = getenv("PWD");
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int saved_errno = errno;
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struct stat pwd_st;
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struct stat cur_st;
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if ( pwd && pwd[0] && stat(pwd, &pwd_st) == 0 && stat(".", &cur_st) == 0 )
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{
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if ( cur_st.st_dev == pwd_st.st_dev && cur_st.st_ino == pwd_st.st_ino )
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return strdup(pwd);
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}
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errno = saved_errno;
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return canonicalize_file_name(".");
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}
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