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[trace] Get the tracee program name from the environment.

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Support non-Linux systems which don't have a /proc/self/cmdline
by transferring the application name given to cairo-trace via
an environment variable CAIRO_TRACE_PROG_NAME.
This commit is contained in:
M Joonas Pihlaja 2009-06-26 16:54:11 +03:00
parent 17cdffafda
commit c64f6f8a15
2 changed files with 21 additions and 13 deletions
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3
util/cairo-trace/cairo-trace.in
View file

@ -85,7 +85,8 @@ if test $# -eq 0; then
usage
fi
#echo $*
CAIRO_TRACE_PROG_NAME="$1"
export CAIRO_TRACE_PROG_NAME
LD_PRELOAD=@libdir@/cairo/cairo-trace.so
export LD_PRELOAD

31
util/cairo-trace/trace.c
View file

@ -651,22 +651,29 @@ _trace_printf (const char *fmt, ...)
static void
get_prog_name (char *buf, int length)
{
FILE *file = fopen ("/proc/self/cmdline", "rb");
*buf = '\0';
char *slash;
FILE *file;
memset (buf, 0, length);
if (length == 0)
return;
file = fopen ("/proc/self/cmdline", "rb");
if (file != NULL) {
char *slash;
slash = fgets (buf, length, file);
fgets (buf, length, file);
fclose (file);
if (slash == NULL)
return;
slash = strrchr (buf, '/');
if (slash != NULL) {
int len = strlen (slash+1);
memmove (buf, slash+1, len+1);
} else {
char const *name = getenv ("CAIRO_TRACE_PROG_NAME");
if (name != NULL) {
strncpy (buf, name, length-1);
}
}
slash = strrchr (buf, '/');
if (slash != NULL) {
size_t len = strlen (slash+1);
memmove (buf, slash+1, len+1);
}
}
static void