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https://github.com/kovidgoyal/calibre.git
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055f5b0979
Ideally someone needs to go through all the code and check that nothing breaks because of this macro, but, I dont have that kind of time
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/*
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* launcher.c
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* Copyright (C) 2014 Kovid Goyal <kovid at kovidgoyal.net>
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*
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* Distributed under terms of the GPL3 license.
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*/
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#define PY_SSIZE_T_CLEAN
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <libgen.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define PATHLEN 1023
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#define SET(x, y) if (setenv(x, y, 1) != 0) { fprintf(stderr, "Failed to set environment variable with error: %s\n", strerror(errno)); return 1; }
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int main(int argc, char **argv) {
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static char buf[PATHLEN+1] = {0}, lib[PATHLEN+1] = {0}, base[PATHLEN+1] = {0}, exe[PATHLEN+1] = {0}, *ldp = NULL;
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if (readlink("/proc/self/exe", buf, PATHLEN) == -1) {
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fprintf(stderr, "Failed to read path of executable with error: %s\n", strerror(errno));
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return 1;
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}
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strncpy(lib, buf, PATHLEN);
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strncpy(base, dirname(lib), PATHLEN);
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snprintf(exe, PATHLEN, "%s/bin/%s", base, basename(buf));
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memset(lib, 0, PATHLEN);
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snprintf(lib, PATHLEN, "%s/lib", base);
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SET("CALIBRE_QT_PREFIX", base)
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memset(buf, 0, PATHLEN);
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ldp = getenv("LD_LIBRARY_PATH");
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if (ldp == NULL) strncpy(buf, lib, PATHLEN);
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else snprintf(buf, PATHLEN, "%s:%s", lib, ldp);
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SET("LD_LIBRARY_PATH", buf)
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argv[0] = exe;
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if (execv(exe, argv) == -1) {
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fprintf(stderr, "Failed to execute binary: %s with error: %s\n", exe, strerror(errno));
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return 1;
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}
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return 0;
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}
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