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author | Chris Metcalf <cmetcalf@tilera.com> | 2014-02-10 10:54:47 -0500 |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2014-02-10 11:04:39 -0500 |
commit | 4372980f5881e7d537a52e3c49588ce116088061 (patch) | |
tree | 138fbc88313c8cb0cabee393e0c08afd67dac6f1 /sysdeps/unix/sysv/linux/generic/dl-origin.c | |
parent | a1ffb40e32741f992c743e7b16c061fefa3747ac (diff) | |
download | glibc-4372980f5881e7d537a52e3c49588ce116088061.tar.gz glibc-4372980f5881e7d537a52e3c49588ce116088061.tar.xz glibc-4372980f5881e7d537a52e3c49588ce116088061.zip |
Move tilegx, tilepro, and linux-generic from ports to libc.
I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy, along with the linux-generic ports infrastructure. Beyond the README update, the move was just git mv ports/sysdeps/tile sysdeps/tile git mv ports/sysdeps/unix/sysv/linux/tile \ sysdeps/unix/sysv/linux/tile git mv ports/sysdeps/unix/sysv/linux/generic \ sysdeps/unix/sysv/linux/generic I updated the relevant ChangeLogs along the lines of the ARM move in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that there were no changes in "objdump -dr" output in the shared objects.
Diffstat (limited to 'sysdeps/unix/sysv/linux/generic/dl-origin.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/generic/dl-origin.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/dl-origin.c b/sysdeps/unix/sysv/linux/generic/dl-origin.c new file mode 100644 index 0000000000..c010076f06 --- /dev/null +++ b/sysdeps/unix/sysv/linux/generic/dl-origin.c @@ -0,0 +1,81 @@ +/* Find path of executable. + Copyright (C) 1998-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/param.h> +#include <ldsodefs.h> +#include <sysdep.h> + +#include <dl-dst.h> + +/* On Linux >= 2.1 systems which have the dcache implementation we can get + the path of the application from the /proc/self/exe symlink. Try this + first and fall back on the generic method if necessary. */ + +const char * +_dl_get_origin (void) +{ + char linkval[PATH_MAX]; + char *result; + int len; + INTERNAL_SYSCALL_DECL (err); + + len = INTERNAL_SYSCALL (readlinkat, err, 4, AT_FDCWD, "/proc/self/exe", + linkval, sizeof (linkval)); + if (! INTERNAL_SYSCALL_ERROR_P (len, err) && len > 0 && linkval[0] != '[') + { + /* We can use this value. */ + assert (linkval[0] == '/'); + while (len > 1 && linkval[len - 1] != '/') + --len; + result = (char *) malloc (len + 1); + if (result == NULL) + result = (char *) -1; + else if (len == 1) + memcpy (result, "/", 2); + else + *((char *) __mempcpy (result, linkval, len - 1)) = '\0'; + } + else + { + result = (char *) -1; + /* We use the environment variable LD_ORIGIN_PATH. If it is set make + a copy and strip out trailing slashes. */ + if (GLRO(dl_origin_path) != NULL) + { + size_t len = strlen (GLRO(dl_origin_path)); + result = (char *) malloc (len + 1); + if (result == NULL) + result = (char *) -1; + else + { + char *cp = __mempcpy (result, GLRO(dl_origin_path), len); + while (cp > result + 1 && cp[-1] == '/') + --cp; + *cp = '\0'; + } + } + } + + return result; +} |